Consulta: subjectFacets:"Progesterone"
Registros recuperados: 62
Data/hora: 05/06/2024 18:06:51

Sincronización del estro con diferentes dosis de progestageno FGA en ovejas
Provedor de dados: 32
Autores: Cedillo Galindo, Nelly.
Se sincronizó estros en ovinos utilizando diferentes dosis del progestágeno  acetato de fluorogestona (FGA). Se evaluaron la presentación y duración del  estro; inicio, duración y amplitud del pico preovulatorio de LH, así como la  concentración promedio de progesterona y la tasa de gestación. Se asignaron  de manera aleatoria tres tratamientos a 30 ovejas, T1: esponja completa  (n=10), T2: ½ esponja (n=10) y T3: ¼ de esponja (n=10). Los resultados para  presentación del estro de T1, T2 y T3 fueron 28.7±1.6, 37.8±2.6  y 28.5±3.5 h,  respectivamente (media ± error estándar; p&gt;0.05); inicio del estro para T1, T2 y  T3 fue 28.7±1.6, 37.8±2.6  y 28.5±3.4 h (p&gt;0.05); los resultados de inicio del  pico preovulatorio de LH para T1, T2 y T3 fueron 28±3.4,...
Palavras-chave: Sincronización; Ovinos; LH; Progesterona; FGA Synchronization; Ewes; LH; Progesterone; FGA.
Ano: 2012
URL: http://hdl.handle.net/10521/864

Sincronización del estro con diferentes dosis de progestageno FGA en ovejas
Provedor de dados: 32
Autores: Cedillo Galindo, Nelly.
Se sincronizó estros en ovinos utilizando diferentes dosis del progestágeno  acetato de fluorogestona (FGA). Se evaluaron la presentación y duración del  estro; inicio, duración y amplitud del pico preovulatorio de LH, así como la  concentración promedio de progesterona y la tasa de gestación. Se asignaron  de manera aleatoria tres tratamientos a 30 ovejas, T1: esponja completa  (n=10), T2: ½ esponja (n=10) y T3: ¼ de esponja (n=10). Los resultados para  presentación del estro de T1, T2 y T3 fueron 28.7±1.6, 37.8±2.6  y 28.5±3.5 h,  respectivamente (media ± error estándar; p&gt;0.05); inicio del estro para T1, T2 y  T3 fue 28.7±1.6, 37.8±2.6  y 28.5±3.4 h (p&gt;0.05); los resultados de inicio del  pico preovulatorio de LH para T1, T2 y T3 fueron 28±3.4,...
Tipo: Tesis
Palavras-chave: Sincronización; Ovinos; LH; Progesterona; FGA; Maestría; Ganadería; Synchronization; Ewes; LH; Progesterone; FGA.
Ano: 2008
URL: http://hdl.handle.net/10521/1234

Influencia de la nutrición en los programas de sincronización de estros, superovulación y transferencia embrionaria en ovejas.
Provedor de dados: 32
Autores: Molina Mendoza, Pedro.
El aspecto nutricional y endocrino tiene influencia en la sincronización de estros y programas de superovulación, evaluándose su efecto en dos experimentos. En el experimento 1 se evaluaron dos régimenes alimenticios y dos programas de sincronización de estros, teniendo los siguientes tratamientos: ovejas sin pre-sincronización alimentadas con heno de avena (HS) o concentrado comercial (TS) y pre-sincronizadas con heno de avena (HP), o concentrado comercial (TP). En el experimento 1 la concentración de P4 fue mayor en  grupos HP y TP (P&lt;0.05). El inicio del estro y la elevación de LH fueron más rápido en los grupos HS y HP (P&lt;0.05). En el experimento 2 se evaluaron dos régimenes de alimentación, un grupo alimentado con concentrado comercial (T) y...
Palavras-chave: Ovis aries; Grasa dorsal; Superovulación; Progesterona; Insulina; Backfat; Superovulation; Progesterone; Insulin; Doctorado; Ganadería.
Ano: 2010
URL: http://hdl.handle.net/10521/96

Influencia del aporte de progesterona exógena (CIDR) post-inseminación sobre la fertilidad de ovinos de las razas cruza Suffolk-Dorset.
Provedor de dados: 32
Autores: Torres Lemus, Fidel Miguel.
El objetivo fue determinar la relación entre el aporte de progesterona exógena a través de un dispositivo intravaginal (CIDR) con la fertilidad, durante el proceso de reconocimiento materno y el mantenimiento de la gestación después de la inseminación artificial. Las ovejas fueron sincronizadas mediante el uso de un dispositivo intravaginal impregnado de un progestágeno natural (CIDR), por un periodo de 9 días. Dos días antes del retiro del dispositivo se aplicó 15 mg de prostaglandina F2α, vía intramuscular. Las ovejas fueron distribuidas al azar en dos grupos,  para constituir los siguientes tratamientos: 1) ovejas inseminadas sin progesterona (P4) adicional (IASP) y 2) ovejas inseminadas que recibieron  progesterona exógena (P4) (IACP) a través de un...
Palavras-chave: Gestación; Embrión; Mortalidad; Synchronization; Artificial Insemination; Pregnancy; Progesterone; Ganadería; Maestría.
Ano: 2013
URL: http://hdl.handle.net/10521/2166

Tratamientos cortos para sincronizar estro con acetato  de flugestona, progesterona natural y la combinación de prostaglandina F2α y  GnRH en ovejas
Provedor de dados: 32
Autores: Ávila Castillo, Blas Rogelio.
El objetivo de este estudio fue evaluar el efecto del acetato de flugestona (FGA) y  progesterona natural (P4) por periodos cortos y la combinación de GnRH y PGF2  en la sincronización del estro en ovejas. En el experimento 1, se utilizaron 40  ovejas adultas (cruzas de Katahdin y Pelibuey) que fueron asignadas al azar a uno  de cuatro tratamientos: T1, grupo testigo, tres aplicaciones de PGF2 con nueve  días de intervalo entre cada aplicación ; T2, inserción de esponjas intravaginales  con 40 mg de FGA por 11 días y aplicación de PGF2 el día del retiro de las  esponjas; T3, inserción de esponjas intravaginales con 40 mg de FGA por 5 días y  aplicación de PGF2 el día del retiro de las esponjas; T4, aplicación de 50 g de  GnRH el día -9 y aplicación de...
Tipo: Tesis
Palavras-chave: Sincronización de estro; Acetato de flugestona; Progesterona; Partos; Ovejas. estrous synchronization; Flugestone acetate; Progesterone; Lambing; Ewes.
Ano: 2009
URL: http://hdl.handle.net/10521/1101

Grasa de sobrepaso en ovejas con diferente  espesor de grasa dorsal y su respuesta en el estro sincronizado, perfil endocrino, porcentaje de gestación y prolificidad.
Provedor de dados: 32
Autores: Nieto Aquino, Rafael.
El objetivo de este estudio fue evaluar el efecto de la grasa de sobrepaso en el estro  sincronizado, porcentaje de gestación y prolificidad en ovejas con baja y alta grasa  dorsal, y su respuesta en hormona luteinizante (LH), estradiol (E2), progesterona (P4) e  insulina (INS). Se utilizaron 59 ovejas, con diferente espesor de grasa dorsal, bajo  (EGb) y alto (EGa), que se subdividieron en grupos: sin (EGbSg, n = 16) y con (EGbCg,  n = 14) la adición de 150 g de grasa de sobrepaso; y sin (EGaSg, n = 14) y con  (EGaCg, n = 15) la adición de 150 g de grasa de sobrepaso, respectivamente. Se  sincronizaron con esponjas de FGA (20 mg), por 12 d, a diez días de su inserción se  aplicaron 15 mg de PGF2α. No se encontraron diferencias (P &gt; 0.05) para las...
Palavras-chave: Ultrasonografía; Insulina; Progesterona; Estradiol; Hormona luteinizante. Ultrasonagraphy; Insulin; Progesterone; Estradiol; Luteinizing hormone.
Ano: 2012
URL: http://hdl.handle.net/10521/882

Tratamientos cortos para sincronizar estro con acetato de flugestona, progesterona natural y la combinación de prostaglandina F2α y  GnRH en ovejas
Provedor de dados: 32
Autores: Ávila Castillo, Blas Rogelio.
El objetivo de este estudio fue evaluar el efecto del acetato de flugestona (FGA) y  progesterona natural (P4) por periodos cortos y la combinación de GnRH y PGF2  en la sincronización del estro en ovejas. En el experimento 1, se utilizaron 40  ovejas adultas (cruzas de Katahdin y Pelibuey) que fueron asignadas al azar a uno  de cuatro tratamientos: T1, grupo testigo, tres aplicaciones de PGF2 con nueve  días de intervalo entre cada aplicación ; T2, inserción de esponjas intravaginales  con 40 mg de FGA por 11 días y aplicación de PGF2 el día del retiro de las  esponjas; T3, inserción de esponjas intravaginales con 40 mg de FGA por 5 días y  aplicación de PGF2 el día del retiro de las esponjas; T4, aplicación de 50 g de  GnRH el día -9 y aplicación de...
Tipo: Tesis
Palavras-chave: Sincronización de estro; Acetato de flugestona; Progesterona; Partos; Ovejas.; Doctorado; Ganadería; Estrous synchronization; Flugestone acetate; Progesterone; Lambing; Ewes.
Ano: 2009
URL: http://hdl.handle.net/10521/1459

Sincronización del estro con diferentes dosis de progestageno FGA en ovejas
Provedor de dados: 32
Autores: Cedillo Galindo, Nelly.
Se sincronizó estros en ovinos utilizando diferentes dosis del progestágeno  acetato de fluorogestona (FGA). Se evaluaron la presentación y duración del  estro; inicio, duración y amplitud del pico preovulatorio de LH, así como la  concentración promedio de progesterona y la tasa de gestación. Se asignaron  de manera aleatoria tres tratamientos a 30 ovejas, T1: esponja completa  (n=10), T2: ½ esponja (n=10) y T3: ¼ de esponja (n=10). Los resultados para  presentación del estro de T1, T2 y T3 fueron 28.7±1.6, 37.8±2.6  y 28.5±3.5 h,  respectivamente (media ± error estándar; p&gt;0.05); inicio del estro para T1, T2 y  T3 fue 28.7±1.6, 37.8±2.6  y 28.5±3.4 h (p&gt;0.05); los resultados de inicio del  pico preovulatorio de LH para T1, T2 y T3 fueron 28±3.4,...
Palavras-chave: Sincronización; Ovinos; LH; Progesterona; FGA Synchronization; Ewes; LH; Progesterone; FGA.
Ano: 2012
URL: http://hdl.handle.net/10521/846

Manejo reproductivo postparto en ovejas de pelo.
Provedor de dados: 32
Autores: Castillo Maldonado, Paulina Paola.
En este estudio se evaluó el efecto del amamantamiento y un protocolo de sincronización postparto (PP) con el efecto del carnero y destete temporal en la respuesta reproductiva de las ovejas de pelo. Aisladas de los carneros dos meses antes de la sincronización, 96 ovejas fueron clasificadas aleatoriamente al parto en dos grupos (n=48): amamantamiento continuo por 18 horas (Ac) y lactancia controlada con amamantamiento por 30 min 2 veces día-1 (Lc). En el día 35 PP las ovejas se sincronizaron con CIDR por 10 días; y 48 horas antes de retirarlo se les aplicó 7.5 mg de dinoprost y se probó el efecto del carnero (Ca) y el destete temporal (Dt). Se determinó el contenido de progesterona plasmática (P4) por RIA a los 30, 35, 50, 55 y 64 días PP. Las ovejas...
Palavras-chave: Efecto del carnero; Tiempo de amamantamiento; Destete temporal; CIDR; Corderos; Progesterona; RIA; Ram effect; Lambs; Progesterone; Hair ewes; Ganadería; Maestría; Temporary weaning; Postpartum lambs.
Ano: 2012
URL: http://hdl.handle.net/10521/1092

Grasa de sobrepaso en ovejas con diferente  espesor de grasa dorsal y su respuesta en el estro sincronizado, perfil endocrino, porcentaje de gestación y prolificidad.
Provedor de dados: 32
Autores: Nieto Aquino, Rafael.
El objetivo de este estudio fue evaluar el efecto de la grasa de sobrepaso en el estro  sincronizado, porcentaje de gestación y prolificidad en ovejas con baja y alta grasa  dorsal, y su respuesta en hormona luteinizante (LH), estradiol (E2), progesterona (P4) e  insulina (INS). Se utilizaron 59 ovejas, con diferente espesor de grasa dorsal, bajo  (EGb) y alto (EGa), que se subdividieron en grupos: sin (EGbSg, n = 16) y con (EGbCg,  n = 14) la adición de 150 g de grasa de sobrepaso; y sin (EGaSg, n = 14) y con  (EGaCg, n = 15) la adición de 150 g de grasa de sobrepaso, respectivamente. Se  sincronizaron con esponjas de FGA (20 mg), por 12 d, a diez días de su inserción se  aplicaron 15 mg de PGF2α. No se encontraron diferencias (P &gt; 0.05) para las...
Palavras-chave: Ultrasonografía; Insulina; Progesterona; Estradiol; Hormona luteinizante. Ultrasonagraphy; Insulin; Progesterone; Estradiol; Luteinizing hormone.
Ano: 2012
URL: http://hdl.handle.net/10521/815

Influencia de la nutrición en los programas de sincronización de estros, superovulación y transferencia embrionaria en ovejas.
Provedor de dados: 32
Autores: Molina Mendoza, Pedro.
El aspecto nutricional y endocrino tiene influencia en la sincronización de estros y programas de superovulación, evaluándose su efecto en dos experimentos. En el experimento 1 se evaluaron dos régimenes alimenticios y dos programas de sincronización de estros, teniendo los siguientes tratamientos: ovejas sin pre-sincronización alimentadas con heno de avena (HS) o concentrado comercial (TS) y pre-sincronizadas con heno de avena (HP), o concentrado comercial (TP). En el experimento 1 la concentración de P4 fue mayor en  grupos HP y TP (P&lt;0.05). El inicio del estro y la elevación de LH fueron más rápido en los grupos HS y HP (P&lt;0.05). En el experimento 2 se evaluaron dos régimenes de alimentación, un grupo alimentado con concentrado comercial (T) y...
Palavras-chave: Ovis aries; Grasa dorsal; Superovulación; Progesterona; Insulina; Backfat; Superovulation; Progesterone; Insulin; Doctorado; Ganadería.
Ano: 2010
URL: http://hdl.handle.net/10521/96

Grasa de sobrepeso en ovejas con diferente  espesor de grasa dorsal y su respuesta en el estro sincronizado, perfil endocrino, porcentaje de gestación y prolificidad.
Provedor de dados: 32
Autores: Nieto Aquino, Rafael.
El objetivo de este estudio fue evaluar el efecto de la grasa de sobrepaso en el estro  sincronizado, porcentaje de gestación y prolificidad en ovejas con baja y alta grasa  dorsal, y su respuesta en hormona luteinizante (LH), estradiol (E2), progesterona (P4) e  insulina (INS). Se utilizaron 59 ovejas, con diferente espesor de grasa dorsal, bajo  (EGb) y alto (EGa), que se subdividieron en grupos: sin (EGbSg, n = 16) y con (EGbCg,  n = 14) la adición de 150 g de grasa de sobrepaso; y sin (EGaSg, n = 14) y con  (EGaCg, n = 15) la adición de 150 g de grasa de sobrepaso, respectivamente. Se  sincronizaron con esponjas de FGA (20 mg), por 12 d, a diez días de su inserción se  aplicaron 15 mg de PGF2α. No se encontraron diferencias (P &gt; 0.05) para las...
Tipo: Tesis
Palavras-chave: Ultrasonografía; Insulina; Progesterona; Hormona luteinizante.; Maestría; Ganadería; Ultrasonagraphy; Insulin; Progesterone; Estradiol; Luteinizing hormone.
Ano: 2009
URL: http://hdl.handle.net/10521/1210

Comparação de protocolos de 8 e 9 dias de duração à base de estradiol e progesterona em vacas submetidas à inseminação artificial em blocos.
Provedor de dados: 14
Autores: PFEIFER, L. F. M.; CESTARO, J. P.; NEVES, P. M. A.; ANDRADE, J. S. de; CASTRO, N. A. de.
No presente estudo, foram comparados dois dos protocolos mais utilizados de IATF para vacas Nelore lactantes no Brasil na técnica IAB com o objetivo de avaliar: 1) se a utilização de IAB em protocolos, baseados no uso de estradiol e progesterona, com 9d é tão efetiva quanto em protocolos com 8d de duração, e; 2) o efeito da categoria animal na fertilidade de vacas inseminadas em Blocos.
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Inseminação em bloco; Jaru (RO); Rondônia; Amazônia Ocidental; Western Amazon; Reprodução Animal; Gado Nelore; Vaca; Inseminação Artificial; Controle Hormonal; Estradiol; Progesterona; Animal reproduction; Nellore; Cows; Artificial insemination; Genetic techniques and protocols; Hormonal regulation; Progesterone.
Ano: 2016
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1125215

Reinício da atividade ovariana em ovelhas Santa Inês no pós-parto.
Provedor de dados: 14
Autores: ELOY, A. M. X.; SOUZA, P. H. F. de.
bitstream/item/26716/1/COT-50.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Raça Santa Inês; Atividade ovariana; Circulação sanguinea; Brasil; Nordeste; Ceará; Ovino; Progesterona; Pós-parto; Ovulação; Sheep; Ovulation; Progesterone; Perinatal period.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/515174

Effect of Bovine Somatotropin Administration on Day 11 after Artificial Insemination in Estrus-Induced Ewes during the Non-Breeding Season
Provedor de dados: 19
Autores: Fukui, Yutaka; Yamamura, Kunio; Matsunaga, Nobuyoshi; Miyamoto, Akio; 福井, 豊; 宮本, 明夫.
The present study aimed to examine the possibility that bovine somatotropin (BST) treatment after artificial insemination (AI) may improve the fertility by the stimulation of corpus luteum (CL) function in seasonally anestrous ewes. The experiment was conducted at the Tawa Field Station, Shibecha-cho in Hokkaido, Japan, during the non-breeding season (May, 1995). Eighty-nine mature (2 to 3 years old) Suffolk and Suffolk-crossed ewes were treated with controlled internal drug release devices containing 0.3 g progesterone (CIDR-G) for 12 days. Ewes were injected intramuscularly with 500 IU PMSG the day before CIDR removal. Eighty-seven ewes were assigned to an insemination of frozen semen on a fixed-time basis (42 to 50 h) after removal of CIDR. On the 11th...
Palavras-chave: Bovine somatotropin; Artificial insemination; Progesterone; Conception rate; Ewes.
Ano: 2000
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2971

Lipopolysaccharide (LPS) Inhibits Steroid Production in Theca Cells of Bovine Follicles In Vitro: Distinct Effect of LPS on Theca Cell Function in Pre- and Post-selection Follicles
Provedor de dados: 19
Autores: MAGATA, Fumie; HORIUCHI, Maya; MIYAMOTO, Akio; SHIMIZU, Takashi; 宮本, 明夫; 清水, 隆.
In postpartum dairy cows, lipopolysaccharide (LPS) derived from gram-negative bacteria such as Escherichia coli causes uterine inflammation and leads to ovarian dysfunction. The aim of this study was to determine the effect of LPS on steroid production in bovine theca cells at different stages of follicular development. Theca cells isolated from pre- and post-selection follicles (PRFs, &lt;8.5 mm in diameter, and POFs, &gt;8.5 mm in diameter, respectively) of bovine ovaries were exposed to LPS under luteinizing hormone (LH) conditions, estradiol (E2) conditions or both conditions in vitro. Bovine theca cells expressed the LPS receptor gene complex: Toll-like receptor 4 (TLR4), CD14 and MD2. LPS suppressed progesterone (P4) and androstenedione (A4)...
Palavras-chave: Androstenedione; Dairy cow; Lipopolysaccharide; Progesterone; Theca cells.
Ano: 2014
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/3935

Changes in Plasma Metabolic Hormone Concentrations During the Ovarian Cycles of Japanese Black and Holstein Cattle
Provedor de dados: 19
Autores: KAWASHIMA, Chiho; KIDA, Katsuya; HAYASHI, Ken-Go; AMAYA MONTOYA, Carlos; KANEKO, Etsushi; MATSUNAGA, Nobuyoshi; SHIMIZU, Takashi; MATSUI, Motozumi; MIYAKE, Yoh-Ichi; SCHAMS, Dieter; MIYAMOTO, Akio; 川島, 千帆; 木田, 克弥; 清水, 隆; 松井, 基純; 三宅, 陽一; 宮本, 明夫.
The aim of the present study was to investigate the changing profiles of plasma metabolic hormones during the ovarian cycles of beef and dairy cattle. We used 16 non-pregnant, non-lactating Japanese Black beef cattle (6 heifers and 10 cows; parity=2.3 ± 0.8) and 12 multiparous Holstein dairy cows (parity=3.0 ± 0.3). Blood samples for hormonal analysis (growth hormone, GH; insulin-like growth factor-I, IGF-1; insulin; and progesterone, P4) were obtained twice weekly for 40 days before artificial insemination for Japanese Black cattle and from 50 to 100 days postpartum for Holstein cows. Luteal phases were considered normal if the P4 concentrations for at least 3 time points over the course of 7 days remained above 1 ng/ml and at least 2 of the time points...
Palavras-chave: Cattle; Insulin-like growth factor-I; Ovarian cycle; Progesterone.
Ano: 2007
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2984

Seasonal changes in serum progesterone levels in Thoroughbred racehorses in training
Provedor de dados: 19
Autores: TAKAHASHI, Yuji; AKAI, Makoto; MURASE, Harutaka; NAMBO, Yasuo.
The objective of the present study was to verify the seasonal luteal activity of racehorses in training in Japan from March to August. We allocated 102 horses into a luteal activity group and non-luteal activity group. The luteal activity group included horses with serum progesterone levels that were consistently &gt;1 ng/ml and changed by ± 1 ng/ml. In contrast, the progesterone levels of the non-luteal activity group were consistently &lt;1 ng/ml. In late spring (from May 1 to June 30) and summer (from July 1 to August 31), the percentage of horses in the luteal activity group was significantly higher than in early spring (from March 1 to April 30, P&lt;0.01). These findings demonstrate clear seasonal variations in ovarian activity. The present study...
Palavras-chave: Racehorse; Progesterone; Seasonal change.
Ano: 2015
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/4290

Differences in progesterone concentrations and mRNA expressions of progesterone receptors in bovine endometrial tissue between the uterine horns ipsilateral and contralateral to the corpus luteum
Provedor de dados: 19
Autores: TAKAHASHI, Hiroto; HANEDA, Shingo; KAYANO, Mitsunori; MATSUI, Motozumi; 羽田, 真悟; 茅野, 光範; 松井, 基純.
Because the establishment of pregnancy begins at the uterine horn ipsilateral to the corpus luteum (ipsi-horn) in cattle, levels of progesterone (P4) and receptor expression in the endometrial tissue, which regulate the intrauterine environment for embryo development, may differ between the ipsi-horn and the uterine horn contralateral to corpus luteum (contra-horn). The aim of the present study was to determine the endometrial tissue P4 concentrations and nuclear progesterone receptor (PGR), progesterone receptor membrane component 1 (PGRMC1) and PGRMC2 mRNA expressions in the cranial and middle parts of the uterine horns during the luteal phase. The results showed higher endometrial tissue P4 concentrations in the cranial part of the ipsi-horn than in...
Palavras-chave: Bovine; Progesterone; Receptor; Uterus.
Ano: 2016
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/4364

Changes of Progesterone and Endothelin Concentrations in the Peripheral Plasma of Female Calves and Cycling Cows: Effects of PGF2α Injection
Provedor de dados: 19
Autores: OHTANI, Masayuki; OKI, Naoko; TANIMURA, Miyune; KOBAYASHI, Shu-ichi; ACOSTA, Tomas J.; HAYASHI, Kanako; MIYAMOTO, Akio; 宮本, 明夫.
It is well known that an injection of prostaglandin F2α (PGF2α) or its analogue during the mid luteal phase of the estrous cycle induces a rapid decrease in plasma progesterone (P4) concentration, followed by luteolysis in the cow. There is evidence that a potent vasoactive peptide, endothelin-1 (ET-1), is produced in the bovine corpus luteum (CL), and that it is directly involved in luteolysis. We previously found that ET-1 concentrations in the peripheral plasma increase during the period of luteolysis and ovulation in cows. However, it is not clear whether the elevation of peripheral plasma ET-1 concentration observed during luteolysis and ovulation originates exclusively from the ovary and/or CL. Such a profile of plasma ET-1 concentration may be...
Palavras-chave: Endothelin; Progesterone; Plasma; Calves; Cows.
Ano: 2001
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2973

Effect of Bone Morphogenetic Protein 6 (BMP6) on Chicken Granulose Cells Proliferation and Progesterone Synthesis
Provedor de dados: 89
Autores: Yang,F; He,L; Luo,B; Ye,F; Cui,C; Yu,X; Xu,H; Zhao,X; Yin,H; Li,D; Zhu,Q; Wang,Y.
ABSTRACT There is increasing evidence that bone morphogenetic protein 6 (BMP6) plays critical roles in regulating various stages of ovarian follicle development in mammals. However, the mechanisms of regulation of BMP6 in the chicken ovary remain unclear. In this study, mRNA and protein expression level of BMP6 in chicken ovarian follicles at different development stages were determined by qRT-PCR and western blot separately. Different concentrations of BMP6 protein and FSH were added to the culture medium, and the effects to proliferation of granulose cells were detected, further effect on expression pattern of progesterone synthesis associated genes were also analyzed by qRT-PCR and Western blotting and the secretion of progesterone was detected by...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chicken; BMP6; Granulosa cells; Progesterone; FSH.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2019000200310

The applications of timed artificial insemination and timed embryo transfer in reproductive management of dairy cattle
Provedor de dados: 96
Autores: Ambrose,Divakar Justus; Colazo,Marcos Germán; Kastelic,John Patrick.
Fertility of dairy cattle is generally decreasing. Overall estrus detection efficiency in lactating dairy cattle is low, as expression of estrus is often compromised. Consequently, undetected estrus, low AI-submission rates, and long inter-breeding intervals are the main contributors to poor reproductive efficiency. Although failure to become pregnant is the most common reason for culling dairy cattle, pregnancy rates could be improved by increasing the AI-submission rate through increased estrus detection efficiency, timed insemination (Timed-AI), or timed embryo transfer (Timed-ET). In these protocols, ovarian follicular development and luteolysis are controlled, culminating in synchronous ovulation in most cows. There are several modifications to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cystic ovaries; Gonadotropin releasing hormone; Porcine luteinizing hormone; Progesterone; Synchronization of ovulation; Ultrasonography.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010001300042

Effectiveness of a low-dose Norgestomet ear implant in short-term protocols to induce estrus in ewes during the non-breeding season in Brazil.
Provedor de dados: 96
Autores: Lima Júnior,Dayrton Farias; Barreto,José Victor Pronievicz; Sterza,Fabiana de Andrade Melo; Souza-Cáceres,Mirela Brochado; Pontes,Vanessa Pereira; Zundt,Marilice; Castilho,Caliê; Cunha Filho,Luiz Fernando Coelho da.
ABSTRACT The objective of this study was to evaluate the reproductive performance of ewes subjected to a short-term protocol for estrus induction using 1 mg of Norgestomet during the non-breeding season in Brazil. A total of 84 ewes were randomly divided into two equal groups (n = 42 per group). Controlled Internal Drug Release (CIDR) containing 330 mg progesterone was inserted into the vagina in the first 42 ewes, and for the other 42 ewes in the second group, 1 mg of Norgestomet was placed subcutaneously in the convex surface of the ear. Implants and devices were removed in both groups on day 6. Following the removal of implants and devices, 10 mg of PGF2α and 300 IU of eCG were injected in all the ewes. After 48 h of application, three fertile rams were...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Animal breeding; Ovine; Progesterone; Reproductive traits; Sheep; Synchronization of estrus.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982019000100603

Ovarian response of Suffolk ewes to estrous synchronization using short-term protocol
Provedor de dados: 96
Autores: Takada,Luciana; Bicudo,Sony Dimas; Rodrigues,Carlos Frederico de Carvalho; Coelho,Lia de Alencar; Mendes,Luiz Claudio Nogueira; Perri,Sílvia Helena Venturoli.
The efficacy of estrus synchronization using short-term protocol was evaluated by ultrasound exams in Suffolk ewes during the pre-breeding season. The control Group (n = 12) was synchronized by treatment for 12 days with vaginal sponges impregnated with medroxyprogesterone acetate, and 400 IU eCG at sponge withdrawal. Experimental groups I, II and III kept the sponge in place for 4 days, and 100 µg of PGF2a was administered at sponge withdrawal. Additionally, Group I (n = 12) had 0.1 mg of estradiol benzoate (EB) administered during sponge placement and 50 µg of GnRH 48 hours after sponge removal. Group II (n = 6) had 35 mg of progesterone (P4) injected, and 0.1 mg of EB administered during sponge placement, 400 IU eCG at withdrawal and 48 hours after, 50...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: ECG; Estradiol benzoate; Follicular dynamics; Progesterone.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000200012

Weight and age at puberty and their correlations with morphometric measurements in crossbred breed Suffolk ewe lambs
Provedor de dados: 96
Autores: Ferra,Janine de Campos; Cieslak,Silvia; Sartori Filho,Roberto; McManus,Connie; Martins,Carlos Frederico; Sereno,José Robson Bezerra.
The objective of this study was to identify and to correlate parameters that characterize puberty and estimate the age and weight of Suffolk ewe lambs in Mato Grosso do Sul. This study was carried out with twenty-two Suffolk ewe lambs for 256 days. Blood samples were collected from the jugular vein and centrifugated and the plasma were stored at -20°C until analysis of progesterone (P4) concentration by radioimmunoassay (RIA). The morphometric measurements included: head length and width, body length, elbow height, chest perimeter, back-sternal diameter, croup length, width and height, cannon bone perimeter and shoulder and hip width, using a tape. The animals became pubertal when the plasma progesterone concentration was &gt;1.0 ng/mL, at 34.1 ± 5.2 kg...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chest perimeter; Progesterone; Radioimmnunoassay; Sheep.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010000100018

Frequency of estrus in Santa Inês, Texel and Ile de France ewes in the northwest of Paraná State, Brazil
Provedor de dados: 96
Autores: Moraes,Gentil Vanini de; Macedo,Francisco de Assis Fonseca de; Lourenço,Fábio José; Macedo,Filipe Gomes de; Rigolon,Luiz Paulo; Nogueira,Guilherme de Paula; Santello,Graziela Aparecida.
The incidence of estrus in nulliparous Santa Inês (n = 16), Texel (n = 16) and Ile de France (n = 15) ewes fed two levels of crude protein (CP, 12 or 16%) was monitored from July 2005 to December 2006, and seasonality in the Santa Inês breed in the south of Brazil was characterized. The solar radiation data were recorded daily, and samples of blood were collected biweekly for determination of the plasma concentration of progesterone in Santa Inês lambs at, on average, 11±1 months of age. The female Santa Inês lambs, in the experimental period, stayed among teaser rams with a powdered-dye-ink mixture placed on their chest to mark the females that accepted to be mounted. Santa Inês ewes did not manifest estrus in the first fortnight of November and in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Photoperiodic; Progesterone; Reproduction; Seasonality.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013001000003

Luteal dynamics in goats: morphological and endocrine features
Provedor de dados: 96
Autores: Arashiro,Eduardo Kenji Nunes; Viana,João Henrique Moreira; Fonseca,Jeferson Ferreira da; Camargo,Luiz Sérgio de Almeida; Fernandes,Carlos Antônio de Carvalho; Brandão,Felipe Zandonadi.
The aim of this study was to establish the morphologic and endocrine characteristics of luteal dynamics in goats. It was used Toggenburg female goats that showed natural estrus in a 48-hour interval. After estrus, ultrasonographic evaluations of the ovaries were daily performed during 21 days using a portable device (5MHz probe). Blood sample was collected for plasma progresterone (P4) determination. Corpora lutea were detected for the first time on day 5 and progressively increased in size until D9 (1.26 ± 0.08 cm²), with no variation on subsequent days. In females with one ovulation, the first visualization of the corpora lutea was earlier than in those with multiple ovulation (4.54 ± 0.18 vs 5.74 ± 0.25 days). At the moment of the first visualization,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Corpus luteum; Goats; Progesterone; Ultrasonography.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010000900011

Effect of the ovulatory follicle diameter and progesterone concentration on the pregnancy rate of fixed-time inseminated lactating beef cows
Provedor de dados: 96
Autores: Pfeifer,Luiz Francisco Machado; Leal,Sofia del Carmen Bonilla de Souza; Schneider,Augusto; Schmitt,Eduardo; Corrêa,Marcio Nunes.
The objective of this study was to evaluate the influence of the ovulatory follicle diameter on the reproductive performance of lactating beef cows subjected to low progesterone fixed-time artificial insemination (FTAI) protocols. Ninety-three lactating beef cows (60-80 days postpartum) at random stages of estrous cycle were given a luteolytic dose of prostaglandin F2α (500 μg cloprostenol; PGF) twice, 11 d apart. Ten days after the second PGF treatment, cows were given 1.5 mg of estradiol benzoate im and a progesterone-releasing intravaginal device (Cue-Mate) with a single pod containing 0.78 g progesterone (Day 0). Cows received another luteolytic dose of PGF on Day 0. On Day 8, the Cue-Mate was removed. Fifty-four to 56 hours later, cows received 12.5...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Corpus luteum; Fertility; Post-partum cows; Progesterone.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000400024

Effects of long-term controlled internal drug release reuse on reproductive performance, hormone profiles, and economic profit of sheep
Provedor de dados: 96
Autores: Swelum,Ayman Abdel-Aziz; Saadeldin,Islam M.; Moumen,Abdullah F.; Ali,Mohamed; Ba-Awadh,Hani; Alowaimer,Abdullah N.
ABSTRACT Fifty-seven multiparous Awassi ewes in the breeding season were used to compare the effects of controlled internal drug release (CIDR) reuse on hormone profiles, reproductive performance, and economic production. Ewes were randomly allotted to one of three CIDR treatments: new (control), once-used, and twice-used; treatment lasted 12 days. Blood samples were collected from all groups at the time of CIDR insertion, three and six days following insertion, at withdrawal time, and at insemination. Serum estradiol (E2) and progesterone (P4) concentrations were measured. Timed insemination was performed 48 h post CIDR withdrawal in all groups. Pregnancy was diagnosed by ultrasonography at day 23 post insemination. No significant differences were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Conception; Estradiol; Estrus; Progesterone; Synchronization; Twining.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982019000100607

Effect of breed and corpus luteum on pregnancy rate of bovine embryo recipients
Provedor de dados: 96
Autores: Nogueira,Ériklis; Cardoso,Gabriel Saravi; Marques Junior,Heitor Romero; Dias,Alexandre Menezes; Ítavo,Luís Carlos Vinhas; Borges,Juliana Corrêa.
The objective of this study was to evaluate pregnancy rates of recipients of different breed groups (Nellore and crossbreed), as well as the effects of size and type of the corpus luteum (CL) on plasmatic concentrations of progesterone and pregnancy rates of embryo recipients. A total of 152 heifers were synchronized with progesterone implants and on the day of embryo transfer, previously obtained by superovulation and frozen in ethylene glycol, the diameter and type of the corpus luteum (cavitary and compact) was measured and blood was collected for progesterone measurement. The pregnancy rate was 44.1%, with a diameter of corpus luteum higher in recipients that became pregnant (2.03±0.41) compared with non-pregnant ones (1.86±0.34 cm). Plasmatic...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cavitary corpus luteum; Nellore; Progesterone; Ultrasound.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000900022

Productive and reproductive parameters in high and low growing Syrian Awassi lambs
Provedor de dados: 2
Autores: Zarkawi, Moutaz; Al-Daker, Moutassem Billah.
The objective of this study was characterize some productive and reproductive parameters in Syrian Awassi ewe lambs during different age stages. Thirty Syrian Awassi ewe lambs aged around 3 months were divided equally into 2 groups, high and low growing to identify productive and reproductive parameters during different stages. Blood samples were collected to determine progesterone and leptin concentrations. Daily milk samples were collected to determine the average daily production. At puberty, average body weight of higher growing was higher (48.4 kg) than de crescimento low growing (42.8 kg). Average age at puberty was 359.5 and 394.9 days for high and low groups, respectively with no differences. Mating, lambing and fecundity rates were similar among...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Awassi ewe lambs; Productive and reproductive parameters; Progesterone; Leptin; Milk production. leptin; Milk production; Progesterone; Puberty.
Ano: 2018
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/37983

Sincronização do estro e da ovulação utilizando protocolos de curta duração durante a pré-estação reprodutiva em ovelhas Suffolk - DOI: 10.4025/actascianimsci.v31i4.6938
Provedor de dados: 2
Autores: Takada, Luciana; USP; Bicudo, Sony Dimas; UNESP; Rodrigues, Carlos Frederico; APTA; Coelho, Lia de Alencar; USP; Perri, Silvia Venturolli; UNESP.
Este trabalho foi realizado com o objetivo de estudar a eficácia do protocolo de curta duração de sincronização do estro. As ovelhas foram divididas em quatro grupos: Grupo Controle (esponjas de MAP por 12 dias, e eCG na retirada); Os Grupos I, II e III permaneceram com a esponja por quatro dias e na retirada foi aplicado 100 &amp;micro;g de PGF e adicionalmente: no Grupo I (0,1 mg de Benzoato de estradiol - BE na colocação da esponja e 48h após a retirada 50 &amp;micro;g de GnRH); Grupo II (35 mg de progesterona injetável e 0,1 mg de BE na colocação da esponja e na retirada 400 UI de eCG e 50 &amp;micro;g de GnRH 48h após); Grupo III (35 mg de progesterona injetável e 0,2 mg de BE na colocação da esponja e na retirada 400 UI de eCG e 50 &amp;micro;g de...
Tipo: Analise laboratorial e pesquisa de campo
Palavras-chave: Benzoato de estradiol; ECG; GnRH; Progesterona; Ultrassonografia reprodução animal Estradiol benzoate; ECG; GnRH; Progesterone; Ultrasound.
Ano: 2009
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/6938

Effects of prostaglandin administration 10 days apart on reproductive parameters of cyclic dairy nulliparous goats
Provedor de dados: 45
Autores: Fonseca,J.F.; Maffili,V.V.; Santos,A.D.F.; Fürst,R.; Prosperi,C.P.; Rovay,H.; Souza,J.M.G.; Torres,C.A.A.
This study reported the effects of prostaglandin (PGF2a) administration 10 days apart on reproductive parameters of cyclic artificial inseminated (AI) nulliparous Alpine (n=9) and Saanen (n=9) goats. Animals received two doses of 22.5mg PGF2a 10 days apart. After 1st and 2nd PGF2a administrations, estrus was monitored at 12 h intervals, with a buck teaser. Plasma progesterone concentration (ng/mL) was determined from blood sampled on day 0 (1st PGF2a) and the following 5, 10 (2nd PGF2a), 15, 20, 25 and 30 days. After the onset of the second estrus, females were transrectally (5 MHz probe) scanned at 4 hour intervals until at least 8h after ovulation. Pregnancy was checked through transrectal ultrasound on days 20, 25, 30, 35 and 90 after insemination. All...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Estrus; Ovulation; Progesterone; Embryo loss; Goat.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352012000200014

Cloprostenol administration in the first week postpartum reduces expression of oxytocin receptors in the endometrium in Holstein-Zebu cows
Provedor de dados: 45
Autores: Camargos,A.; Wohlres-Viana,S.; Costa,I.F.; Camargo,L.S.; Ferreira,J.C.; Ramos,A.A.; Oba,E.
ABSTRACT The present study investigated the hormonal profile and expression of prostaglandin F2α (PGF2α), oxytocin and estrogen receptors in uterine tissues of postpartum cows treated with cloprostenol. Twenty Holstein-Zebu crossbred cows were treated with saline solution (treatment CONT) or cloprostenol (treatment CLO), both administered two and five days postpartum. Blood samples were collected on days two, seven, 14, 21 and 28 postpartum for progesterone, PGF2α metabolite (PGFM) and estradiol determination, and endometrial biopsy was performed in order to quantify the expression of oxytocin receptor (OXTR), prostaglandin F receptor (PTGFR) and estrogen receptor 1 (ERS1) genes. In the CLO treatment, expression of OXTR was reduced (P&lt;0.05) but no...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: PTGFR; ESR1; Progesterone; Estradiol; RT-PCR.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352017000400821

Morphology and vascularization of the corpus luteum of peccaries (Pecari tajacu, Linnaeus, 1758) throughout the estrous cycle
Provedor de dados: 45
Autores: Miranda-Moura,M.T.M.; Oliveira,G.B.; Peixoto,G.C.X.; Pessoa,J.M.; Papa,P.C.; Maia,M.S.; Moura,C.E.B.; Oliveira,M.F.
The current paper characterizes the changes in morphology and vascularization of the corpus luteum of collared peccaries during the estrous cycle and correlates progesterone synthesis (P4). Twenty females were subjected to a treatment for estrus synchronization; an ear implant containing 1.5 mg of norgestomet was implanted on D0, whereas on D9 the peccaries received an IM injection of eCG 200UI and 50g of PGF2a. The animals were divided into four groups (G1, G2, G3 and G4) and euthanized on post-ovulation days 3, 12, 18 and 22. The ovaries were collected and the corpora lutea were measured and processed for histological and vascular density (Dv). Blood was collected for dosage of P4 serum. The morphology of the ovaries, the corpora lutea and P4 varied...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Collared peccary; Corpora lutea; Estrous cycle; Progesterone; Vascular density.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352016000100087

Although it induces synchronized ovulation, hCG reduces the fertility of Santa Ines ewes submitted to TAI
Provedor de dados: 45
Autores: Dias,L.M.K.; Sales,J.N.S.; Viau,P.; Barros,M.B.P.; Nicolau,S.S.; Simões,L.M.S.; Alves,N.G.; Alonso,M.A.; Valentim,R.; Oliveira,C.A.
ABSTRACT The aim of this study was to evaluate hCG treatment on ovarian response and on pregnancy rate using a 9-day oestrus synchronization protocol in Santa Ines ewes. On a random oestrus cycle day, ewes received an intravaginal progesterone device (Primer-PR®, Tecnopec, Brazil). Nine days later (Day 9), 30µg of d-cloprostenol (Prolise®, Syntex, Argentina) and 250IU of eCG (Folligon®, Intervet, Brazil) were administered and the progesterone device was removed. This moment, the ewes were randomly assigned on two groups: Control Group and hCG Group. In the hCG Group, the ewes received 500IU of hCG (Vetecor®, Hertape-Calier, Spain) 24h after device removal. In the Control Group, the ewes did not receive any ovulation inductor. Control and hCG Groups ewes...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Progesterone; Follicle; Ovulation; Synchronization.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352018000100122

Conception rate in Holstein cows treated with GnRH or hCG on the fifth day post artificial insemination during summer
Provedor de dados: 45
Autores: Beltran,M.P.; Vasconcelos,J.L.M.
Lactating Holstein cows (n=158), at 213±112 days in milking and averaging 26±9kg of milk per day, were randomly assigned to one of three treatment groups: control (CG, n=52, saline), GnRH (GG, n=55, 100g gonadorelin), and hCG (HG, n=51, 2500IU) given five days after artificial insemination (AI). Rectal temperature was taken at the moment of AI and blood samples were collected five, seven, and 12 days after AI. Pregnancy was determined between 42 and 49 days after AI. Concentration of progesterone (P4) in serum (ng/ml, mean±SE) for CG, GG, and HG were, respectively, 2.7±0.4, 2.5±0.4, and 3.2±0.5 on day 5; 4.8±0.4, 4.2±0.4, and 5.7±0.5 on day 7; and 5.2±0.4, 6.9±0.4, and 8.5±0.5 on day 12 after AI. P4 concentration had proportional increase in serum between...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dairy cow; Conception; Progesterone; HCG; GnRH.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352008000300009

Metabolic stress and reproductive features in post-partum goats supplemented for a long period with detoxified castor meal as the source of dietary nitrogen
Provedor de dados: 45
Autores: Silva,L.M.; Oliveira,C.H.A.; Silva,A.M.; Montenegro,A.R.; Fernandes,C.C.L.; Silva,C.M.G.; Rossetto,R.; Rondina,D.
ABSTRACT This study evaluated the effect of detoxified castor meal on the reproductive performance, metabolic stress, milk production, and kid development in peripartum goats. The diet of the animals were with (DCM, n= 20) or without (WDCM, n= 21) detoxified castor meal during the entire gestation and until weaning, 60 days post-birth. No differences were observed in the gestation period, litter size, rate of multiple births, and mortality between the two groups. The postpartum plasma concentrations of progesterone remained below 1ng/mL in all animals, thus, confirming the absence of active corpora lutea. The thickness of sternum adipose tissue and loin area, levels of urea and cholesterol, milk production, and daily weight gain in the kids were low in the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ricinus communis L; Postpartum; Lactation; Goat kids; Progesterone.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352020000100136

Clinical and pathological study of feline mammary fibroadenomatous change associated with depot medroxyprogesterone acetate therapy
Provedor de dados: 45
Autores: Loretti,A.P.; Ilha,M.R.S.; Breitsameter,I.; Faraco,C.S.
Descrevem-se seis casos de alteração fibroadenomatosa mamária felina (AFAMF) associada à administração de uma única injeção de acetato de medroxiprogesterona (AMP) na dose recomendada pelos fabricantes. A doença foi observada em gatas jovens não-castradas atendidas em dois hospitais veterinários de 1999 a 2001. O diagnóstico de AFAMF foi feito com base no histórico, sinais clínicos e achados macroscópicos e confirmado histologicamente em quatro dos seis casos. Sugere-se que a ocorrência da AFAMF esteja associada ao efeito prolongado de uma única injeção de AMP de depósito administrada em situações nas quais o emprego dessa terapia não é recomendado.
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Cat; Feline mammary fibroadenomatous change; Progesterone.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352004000200020

Serum progesterone concentration and conception rate of beef cows supplemented with ground corn after a fixed-time artificial insemination protocol
Provedor de dados: 45
Autores: Pescara,J.B.; Sá Filho,O.G.; Losi,T.C.; Cooke,R.F.; Vasconcelos,J. L. M.
The effects of different levels of finely ground corn (FC) supplementation to grazing beef cows after fixed-time AI (TAI) on serum progesterone (P4) concentrations on day 7 and conception rates on day 28 after TAI were investigated. Three hundred and sixty-four lactating multiparous Brangus cows had follicular and luteal activity synchronized by treatment with estradiol benzoate (Estrogin; 2.0mg IM) and insertion of intra-vaginal P4 releasing device (CIDR) on day -11, followed by treatment with PGF2α (Lutalyse; 25mg IM) on day -4, CIDR and calf removal on day -2, and treatment with GnRH (Fertagyl; 100µg IM) TAI and calf return on day 0. On day 0, cows were randomly allotted in one of the following FC supplement treatments: G1 - 2kg/day from day 0 to 21; G2...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Beef cow; Conception rate; Energy intake; Progesterone.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352010000100018

Estradiol and progesterone fecal metabolites analysis in crab-eating-fox (Cerdocyoun thous)
Provedor de dados: 45
Autores: Paz,R.C.R.; Souza,N.P.; Furtado,P.V.; Brown,J.L.
ABSTRACT In this study, four crab-eating fox females (Cerdocyon thous) maintained at the Federal University of Mato Grosso Zoo, Cuiabá, Brazil, were investigated for 12 months, using feces measurement of estradiol and progesterone concentrations. Fecal collections were performed three times a week for hormone extraction. Two methods of analysis, Elisa (EIA) and Radioimmunoassay (RIA), were used in the measurement of progesterone (P4) and estradiol (E2) metabolites. The aim of this study was to compare and validate two different methods of hormone measurement for C. thous. There were no differences regarding the method used. The Radioimmunoassay technique proved to be more sensitive, however, both showed similar results.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Radioimmunoassay; Elisa; Estradiol; Progesterone; Fecal.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352016000300636

Ovarian follicular dynamic and plasma progesterone concentration in Alpine goats on the breeding season
Provedor de dados: 45
Autores: Alves,N.G.; Torres,C.A.A.; Guimarães,J.D.; Moraes,E.A.; Costa,P.B.; Silva,D.R.
RESUMO Os objetivos deste estudo foram relatar a dinâmica folicular ovariana e a concentração plasmática de progesterona durante ciclos estrais de duração irregular em cabras da raça Alpina. Vinte e nove cabras tiveram sua atividade ovariana monitorada diariamente por ultrassonografia transretal durante um, dois ou três períodos interovulatórios consecutivos. Amostras de sangue foram coletadas para análise da concentração plasmática de progesterona. Dos 47 ciclos avaliados, 28 (59,57%) foram de duração normal (17 a 25 dias), sete (14,89%) de curta duração (&lt;17 dias) e 12 (25,53%) de longa duração (&gt;25 dias). Os ciclos estrais de curta duração tiveram 6,14±0,69 dias e uma onda folicular que emergiu no dia 0,43±1,13. Os ciclos estrais de longa duração...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Follicular development; Corpus luteum; Progesterone; Short estrous cycles.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352018000602017

Proacrosin-acrosin activity in capacitated and acrosome reacted sperm from cryopreserved bovine semen
Provedor de dados: 47
Autores: Rosatti,M. I.; Beconi,M. T.; Córdoba,M.
Acrosin activity is associated with normal fertility in human and bovine spermatozoa. The aim of the study was to determine the variation of the enzyme activity in the proacrosin-acrosin system in capacitated and acrosome reacted cryopreserved bovine sperm. Enzyme activity was assessed spectrophotometrically using N-a-benzoyl-DL-arginine p-nitroanilide (BAPNA) as specific substrate for acrosin at pH 8. Capacitation with heparin and quercitin failed to induce conversion of proacrosin to acrosin. An increase in acrosin activity produced by the presence of progesterone, in a dose-dependent manner, was related with the induction of true acrosome reaction. The total level of acrosin activity registered showed that 96% of acrosin of capacitated sperm samples and...
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Bovine sperm; Proacrosin-acrosin; Heparin; Quercitin; Progesterone.
Ano: 2004
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-95452004000300007

Glucose transporters: expression, regulation and cancer
Provedor de dados: 48
Autores: MEDINA,RODOLFO A.; OWEN,GARETH I.
Mammalian cells depend on glucose as a major substrate for energy production. Glucose is transported into the cell via facilitative glucose transporters (GLUT) present in all cell types. Many GLUT isoforms have been described and their expression is cell-specific and subject to hormonal and environmental control. The kinetic properties and substrate specificities of the different isoforms are specifically suited to the energy requirements of the particular cell types. Due to the ubiquitousness of these transporters, their differential expression is involved in various disease states such as diabetes, ischemia and cancer. The majority of cancers and isolated cancer cell lines over-express the GLUT family members which are present in the respective tissue of...
Tipo: Journal article
Palavras-chave: GLUT; Glucose transporters; Expression; Cancer; Estrogen; Progesterone; Cell lines.
Ano: 2002
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602002000100004

Post partum reproductive assessment in lowland Tapir (Tapirus terrestris): a case report
Provedor de dados: 62
Autores: OLIVEIRA,Cláudio Alvarenga de; NOGUEIRA,Guilherme de Paula; CASTRO,João César Bedran de.
The lowland tapir is the biggest Brazilian terrestrial mammal, which belongs to the order Perissodactyla, suborder Hippomorpha, superfamily Tapiroidea and a member of the family Tapiridae. At tropical forest the tapir is involved with seed dispersal. The knowledge of this wild animal reproductive cycle is one way to help its preservation. The stress due to restrain of captive or free-ranging wild animal in order to sample collection limits endocrine study once it can be hazard for the estrous cycle. One possibility is to quantify gonadal hormones at the excreta. Progesterone milk levels were studied in a tapir housed at the Araçatuba Zoo, in São Paulo, Brazil. Milk samples, vaginal cytology and rectal temperature were collected during lactation. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Tapirus terrestris; Milk; Progesterone; Animal reproduction.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-95962001000600009

Evaluation of extraction methods for progesterone determination in rabbit (Oryctolagus cuniculus) feces by radioimmunoassay
Provedor de dados: 62
Autores: KORNDÖRFER,Clotilde Maria; MEIRELLES,Cyro Ferreira; BUENO,Ives Cláudio da Silva; ABDALLA,Adibe Luiz.
The purpose of this study was to find a practical procedure for the extraction of progesterone (P4) from feces and to determine if the P4 plasma profiles during pregnancy were reflected in the total fecal P4 of pregnant rabbits. The rabbit was used as model for the techniques. Plasma and feces were collected from 11 rabbits during a period of 42 days. Three different methods of P4 extraction were used. The total P4 was measured by solid-phase radioimmunoassay (RIA) with 125I-P4 as the tracer. Results suggested that it was possible to extract total P4 from rabbit feces with methanol and petroleum ether. Plasma and fecal P4 profiles were compared for both pregnant and ovariectomized rabbits. It was possible to differentiate total P4 extracted from day two...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Progesterone; Feces; Radioimmunoassay; Rabbit.
Ano: 1998
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-95961998000300004

Early embryonic death in mares: clinical and hormonal aspects
Provedor de dados: 62
Autores: PAPA,Frederico Ozanam; LOPES,Maria Denise; ALVARENGA,Marco Antonio; MEIRA,Cezinande de; LUVIZOTTO,Maria Cecília Rui; LANGONI,Hélio; RIBEIRO,Erley Felix; AZEDO,Antonio Esteves; BOMFIM,Antonio Carlos de Miranda.
The present study aimed to diagnose early embryonic death in 128 mares. Blood samples were collected at the 4th, 7th, 10th, 13th, 16th, 19th, 21st and 30th day after ovulation and the diameter of the corpus luteum was measured. The diameter and characteristics of the embryonic vesicle were evaluated by ultrasonography. Microbiology, cytology and histopathology were carried out in mares with embryonic death. Plasma oestrogen and progesterone concentration were measured by radioimmunoassay. From 128 mares, 17 (13.28%) showed early embryonic death. The embryonic losses took place at 19 days of pregnancy in 47.05% and at 21 days of pregnancy in 29.4% of the mares. The diameter of the corpus luteum in the mares that maintained pregnancy was similar to those...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Embryo mortality; Progesterone; Estrogen; Histopathology; Equine.
Ano: 1998
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-95961998000400005

Influence of progesterone on GAD65 and GAD67 mRNA expression in the dorsolateral striatum and prefrontal cortex of female rats repeatedly treated with cocaine
Provedor de dados: 56
Autores: Souza,M.F.; Toniazo,V.M.; Frazzon,A.P.G.; Barros,H.M.T.
Female rats are intensely affected by cocaine, with estrogen probably playing an important role in this effect. Progesterone modulates the GABA system and attenuates the effects of cocaine; however, there is no information about its relevance in changing GABA synthesis pathways after cocaine administration to female rats. Our objective was to investigate the influence of progesterone on the effects of repeated cocaine administration on the isoenzymes of glutamic acid decarboxylase (GAD65 and GAD67) mRNA in brain areas involved in the addiction circuitry. Ovariectomized, intact and progesterone replacement-treated female rats received saline or cocaine (30 mg/kg, ip) acutely or repeatedly. GAD isoenzyme mRNA levels were determined in the dorsolateral...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cocaine; Progesterone; GAD mRNA; Dorsolateral striatum; Prefrontal cortex.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2009001100011

Estrogen and progesterone promote breast cancer cell proliferation by inducing cyclin G1 expression
Provedor de dados: 56
Autores: Tian,J-M.; Ran,B.; Zhang,C-L.; Yan,D-M.; LI,X-H.
Breast cancer is the most common cause of cancer among women in most countries (WHO). Ovarian hormone disorder is thought to be associated with breast tumorigenesis. The present study investigated the effects of estrogen and progesterone administration on cell proliferation and underlying mechanisms in breast cancer MCF-7 cells. It was found that a single administration of estradiol (E2) or progesterone increased MCF-7 cell viability in a dose-dependent manner and promoted cell cycle progression by increasing the percentage of cells in the G2/M phase. A combination of E2 and progesterone led to a stronger effect than single treatment. Moreover, cyclin G1 was up-regulated by E2 and/or progesterone in MCF-7 cells. After knockdown of cyclin G1 in MCF-7 cells...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Breast cancer; Estrogen; Progesterone; Cyclin G1; Cell proliferation.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2018000300611

Different stress modalities result in distinct steroid hormone responses by male rats
Provedor de dados: 56
Autores: Andersen,M.L.; Bignotto,M.; Machado,R.B.; Tufik,S.
Since both paradoxical sleep deprivation (PSD) and stress alter male reproductive function, the purpose of the present study was to examine the influence of PSD and other stressors (restraint, electrical footshock, cold and forced swimming, N = 10 per group) on steroid hormones in adult Wistar male rats. Rats were submitted to chronic stress for four days. The stressors (footshock, cold and forced swimming) were applied twice a day, for periods of 1 h at 9:00 and 16:00 h. Restrained animals were maintained in plastic cylinders for 22 h/day whereas PSD was continuous. Hormone determination was measured by chemiluminescent enzyme immunoassay (testosterone), competitive immunoassay (progesterone) and by radioimmunoassay (corticosterone, estradiol, estrone)....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Paradoxical sleep deprivation; Stress; Testosterone; Progesterone; Estrogen; Corticosterone.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2004000600003

Effect of sildenafil (Viagra®) on the genital reflexes of paradoxical sleep-deprived male rats
Provedor de dados: 56
Autores: Andersen,M.L.; Bignotto,M.; Tufik,S.
Since there is evidence that paradoxical sleep deprivation (PSD) elicits penile erection (PE) and ejaculation (EJ), and that the erectile response of rats is mediated by nitric oxide, the present study sought to extend the latter finding by assessing the effects of sildenafil on the genital reflexes of male Wistar rats subjected to PSD. We also determined the influence of sildenafil on hormone concentrations. In the first experiment, sildenafil at doses ranging from 0.08 to 0.32 mg/kg was administered intraperitoneally to rats that had been deprived of sleep for 4 days and to home cage controls (N = 8-10/group). The frequency of PE and EJ was measured for 60 min. PSD alone induced PE in 50% of the animals; however, a single injection of sildenafil did not...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Paradoxical sleep deprivation; Sildenafil; Genital reflexes; Dopamine; Testosterone; Progesterone.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2007001100008

Comparison of serum hormone levels of captive and free-living maned wolves Chrysocyon brachyurus
Provedor de dados: 56
Autores: Maia,O.B.; Jácomo,A.T.A.; Bringel,B.A.; Kashivakura,C.K.; Oliveira,C.A.; Teodoro,L.O.F.; Silveira,L.; Teixeira da Costa,M.E.L.; Malta,M.C.C.; Furtado,M.M.; Torres,N.M.; Mattos,P.S.R.; Viau,.P; Lima,T.F.G.; Morato,R.G.
Serum hormone levels were compared between captive and free-living maned wolves and seasonal variations of sex hormones were studied. Blood samples were collected from 16 male and 26 female adult animals from Brazilian zoos, and from 30 male and 24 female free-living adults to determine serum progesterone and testosterone by radioimmunoassay. Serum testosterone concentrations varied (P &lt; 0.05) across seasons for 16 captive males, being higher in autumn (2184.7 ± 355.1 pg/mL) than in summer (1080.7 ± 205.4 pg/mL), winter (1270.1 ± 276.6 pg/mL) and spring (963.9 ± 248.1 pg/mL), although they did not differ between summer, winter and spring. Testosterone concentration of 30 free-living males differed (P &lt; 0.05) between autumn (824.1 ± 512.2 pg/mL),...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Maned wolf Chrysocyon brachyurus; Progesterone; Testosterone; Radioimmunoassay; Reproduction.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2008000200015

Regulation of antioxidant enzyme activities in male and female rat macrophages by sex steroids
Provedor de dados: 56
Autores: Azevedo,R.B.; Lacava,Z.G.M.; Miyasaka,C.K.; Chaves,S.B.; Curi,R.
Human and animal immune functions present sex dimorphism that seems to be mainly regulated by sex hormones. In the present study, the activities of the antioxidant enzymes total superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GSH-Px) were measured in intraperitoneal resident macrophages from adult male and female rats. In addition to comparing males and females, we also examined the regulation of these enzyme activities in macrophages by sex steroids. GSH-Px activity did not differ between male and female macrophages. However, both total SOD and CAT activities were markedly higher in females than in males (83 and 180%). Removal of the gonads in both males and females (comparison between castrated groups) increased the difference in...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Antioxidant enzymes; Macrophages; Sex hormones; Estrogen; Progesterone; Castration.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2001000500018

Roles of estrogen and progesterone in modulating renal nerve function in the rat kidney
Provedor de dados: 56
Autores: Graceli,J.B.; Cicilini,M.A.; Bissoli,N.S.; Abreu,G.R.; Moysés,M.R.
The maintenance of extracellular Na+ and Cl- concentrations in mammals depends, at least in part, on renal function. It has been shown that neural and endocrine mechanisms regulate extracellular fluid volume and transport of electrolytes along nephrons. Studies of sex hormones and renal nerves suggested that sex hormones modulate renal function, although this relationship is not well understood in the kidney. To better understand the role of these hormones on the effects that renal nerves have on Na+ and Cl- reabsorption, we studied the effects of renal denervation and oophorectomy in female rats. Oophorectomized (OVX) rats received 17β-estradiol benzoate (OVE, 2.0 mg·kg-1·day-1, sc) and progesterone (OVP, 1.7 mg·kg-1·day-1,sc). We assessed Na+ and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Estrogen; Na+ and Cl- reabsorption; Progesterone; Renal nerve.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2013000600521

Effects of metformin treatment on luteal phase progesterone concentration in polycystic ovary syndrome
Provedor de dados: 56
Autores: Meenakumari,K.J.; Agarwal,S.; Krishna,A.; Pandey,L.K.
The causes of luteal phase progesterone deficiency in polycystic ovary syndrome (PCOS) are not known. To determine the possible involvement of hyperinsulinemia in luteal phase progesterone deficiency in women with PCOS, we examined the relationship between progesterone, luteinizing hormone (LH) and insulin during the luteal phase and studied the effect of metformin on luteal progesterone levels in PCOS. Patients with PCOS (19 women aged 18-35 years) were treated with metformin (500 mg three times daily) for 4 weeks prior to the test cycle and throughout the study period, and submitted to ovulation induction with clomiphene citrate. Blood samples were collected from control (N = 5, same age range as PCOS women) and PCOS women during the late follicular (one...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Polycystic ovary syndrome; Metformin; Luteal phase defect; Progesterone.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2004001100007

Estrous cycle and stress: influence of progesterone on the female brain
Provedor de dados: 56
Autores: Lovick,T.A.
The female brain operates in a constantly changing chemical milieu caused by cyclical changes in gonadal hormones during the estrous cycle (menstrual cycle in women). Such hormones are highly lipophilic and pass readily from the plasma to the brain where they can influence neuronal function. It is becoming clear that the rapid reduction in peripheral circulating progesterone, which occurs during the late diestrous phase of the cycle, can trigger a withdrawal-like response, in which changes in GABA A receptor expression render hyper-responsive certain brain areas involved in processing responses to stressful stimuli. The periaqueductal gray matter (PAG) is recognised as an important region for integrating anxiety/defence responses. Withdrawal from...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Female; Estrous cycle; Stress; Anxiety; Progesterone; Neurosteroid replacement.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2012000400005

Effect of medroxyprogesterone acetate on thyrotropin secretion in adult and old female rats
Provedor de dados: 56
Autores: Moreira,R.M.; Borges,P.P.; Lisboa,P.C.; Curty,F.H.; Moura,E.G.; Pazos-Moura,C.C.
Steroid hormones have been implicated in the modulation of TSH secretion; however, there are few and controversial data regarding the effect of progesterone (Pg) on TSH secretion. Medroxyprogesterone acetate (MPA) is a synthetic alpha-hydroxyprogesterone analog that has been extensively employed in therapeutics for its Pg-like actions, but that also has some glucocorticoid and androgen activity. Both hormones have been shown to interfere with TSH secretion. The objective of the present study was to investigate the effects of MPA or Pg administration to ovariectomized (OVX) rats on in vivo and in vitro TSH release and pituitary TSH content. The treatment of adult OVX rats with MPA (0.25 mg/100 g body weight, sc, daily for 9 days) induced a significant...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Medroxyprogesterone acetate; Progesterone; Thyrotropin; Aging; Ovariectomy; Thyrotropin-releasing hormone.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2000000900020

Behavioral effects of endogenous or exogenous estradiol and progesterone on cocaine sensitization in female rats
Provedor de dados: 56
Autores: Souza,M.F.; Couto-Pereira,N.S.; Freese,L.; Costa,P.A.; Caletti,G.; Bisognin,K.M.; Nin,M.S.; Gomez,R.; Barros,H.M.T.
Cocaine sensitization is a marker for some facets of addiction, is greater in female rats, and may be influenced by their sex hormones. We compared the modulatory effects of endogenous or exogenous estradiol and progesterone on cocaine-induced behavioral sensitization in 106 female rats. Ovariectomized female rats received progesterone (0.5 mg/mL), estradiol (0.05 mg/mL), progesterone plus estradiol, or the oil vehicle. Sham-operated control females received oil. Control and acute subgroups received injections of saline, while the repeated group received cocaine (15 mg/kg, ip) for 8 days. After 10 days, the acute and repeated groups received a challenge dose of cocaine, after which locomotion and stereotypy were monitored. The estrous cycle phase was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cocaine; Locomotor activity; Female rats; Estradiol; Progesterone; Stereotypic activity.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2014000600505

Laparoscopic-assisted treatment of pyometra associated with mammary fibroadenomatous hyperplasia in a cat
Provedor de dados: 65
Autores: Colomé,Lucas Marques; Kunert Filho,Hiran Castagnino; Feranti,João Pedro Scussel; Santos,Fabiane Reginatto dos; Sartori,Luana Walendorff; Brun,Maurício Veloso.
This paper describes a case of laparoscopic-assisted ovariohysterectomy in a female cat presenting pyometra and mammary fibroadenomatous hyperplasia. Using four portals, mesovarium were ligated by titanium ligature clips whereas the uterine vessels were occluded by video-assisted conventional ligatures. There were no postoperative complications. Video-assisted technique can be an alternative method for treatment of pyometra and cystic endometrial hyperplasia in female cats.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Laparoscopy; Ovariohysterectomy; Endosurgery; Progesterone; Uterus.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782014000300018

Mammary fibroadenomatoid hyperplasia in a heifer
Provedor de dados: 65
Autores: Silva,Lorena Ferreira; Silva,Luiz Antonio Franco da; Rabelo,Rogério Elias; Silva,Wanessa Patrícia Rodrigues da; Cassali,Geovanni Dantas; Gonçalves,Aline De Biasi Bassani; Sant’Ana,Fabiano José Ferreira de.
ABSTRACT: This manuscript described the anatomopathological and immunohistochemical findings in a rare case of mammary fibroadenomatoid hyperplasia in a 12-month-old Holstein heifer. A yellow, multilobulated, firm 20cm x 9cm x 6.5cm mass affecting the right quarters of the udder was observed. Total mastectomy was performed. Microscopic evaluation revealed severe hyperplasia of the mammary epithelium and numerous well-differentiated and mildly pleomorphic acini. Additionally, moderate proliferation of the fibrous connective tissue and the myoepithelial cells near the proliferating acini was evident. About 50% of the proliferating epithelial cells showed positive nuclear labeling for estrogen and progesterone receptors, and approximately one-third were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mammary hyperplasia; Estrogen; Progesterone; Diseases of cattle.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000600552

Characterization of progesterone loaded biodegradable blend polymeric nanoparticles
Provedor de dados: 65
Autores: Leimann,Fernanda Vitória; Biz,Maiara Heloisa; Kaufmann,Karine Cristine; Maia,Wallace José; Honçalves,Odinei Hess; Cardozo Filho,Lucio; Sayer,Claudia; Araújo,Pedro Henrique Hermes de.
ABSTRACT: The encapsulation of progesterone in poly (hydroxybutirate-co-hydroxyvalerate) (PHBV), poly (ε-caprolactone) (PCL), poly (L-lactic acid) (PLLA) nanoparticles and PHBV/PCL and PHBV/PLLA blend nanoparticles was investigated in this research. Nanoparticles were produced by miniemulsion/solvent evaporation technique with lecithin as surfactant and were characterized regarding to z-average diameter (Dz) and polydispersity (PDI), progesterone recovery yield and encapsulation efficiency. Possible interactions between progesterone and the polymer matrices were investigated by Fourier Transform Infrared Spectroscopy (FTIR). High recoveries (up to 102.43±1.80% for the PHBV/PLLA blend) and encapsulation efficiencies (up to 99.53±0.04% for PCL) were achieved...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Progesterone; Drug-polymer interactions; PHBV; PLLA; PCL.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015001102082

FACTORS AFFECTING PREGNANCY RATES AFTER OVUM PICK UP-DERIVED EMBRYO TRANSFER IN LACTATING HOLSTEIN RECIPIENTS UNDER TROPICAL CONDITIONS
Provedor de dados: 64
Autores: Pinto,Tássia Louregiani Carvalho; Nogueira,Marina Bottrel Reis; Sales,José Nélio de Sousa; Carvalho,Rafaela Rodrigues de; Cushman,Robert Andrew; Souza,José Camisão de.
ABSTRACTHigh milk production, heat, physiological status and management impair reproduction in Holstein cows. The use of in vivo-produced embryos has been reported as an alternative to enhance pregnancy outcome in the tropics; however there are several limitations for its production, especially from variations in superovulatory responses. The in vitro production of embryos would avoid such variations, but few studies have been reported. This study aims to verify the effects of variables related to recipients under a program of routine in vitro embryo transfer on a commercial dairy farm in southeastern Brazil. It was hypothesized that pregnancy rates after transfer of ovum pick up or OPUderived embryos (ET) to lactating Holstein recipients may be influenced...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bovine; GnRH agonists; Progesterone.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542015000500498