Consulta: subjectFacets:"Follicle"
Registros recuperados: 19
Data/hora: 06/06/2024 01:11:34

Efecto macho en la dinámica folicular de ovejas de lana superovuladas.
Provedor de dados: 32
Autores: Domínguez Islas, Manuel.
Se evaluó la incorporación del “efecto macho” a un protocolo de superovulación. Se utilizaron 20 ovejas de lana de la raza Suffolk, Hampshire y Dorset, de condición corporal (cc)  3.1 ± 0.4, con edad promedio de 3.9 ± 0.8 años, durante época de transición de anestro a temporada reproductiva en los meses de junio-julio del 2011. Se asignaron 10 ovejas de manera aleatoria en dos lotes. Los tratamientos fueron los siguientes: Tratamiento 1 (T1): se introdujo un CIDR (considerado día 0) a cada ovejas durante 9 días, 48 horas previas al retiro, se administro 500 μg de Cloprostenol, además de 300 UI de Gonadotropina coriónica equina (eCG) y 250 UI de gonadotropinas hipofisarias de cerdo cada 12 horas (48, 36, 24, 12, 0 previas al retiro y 12 h después del...
Palavras-chave: Efecto macho; Ovejas; Anestro; Gonadotropinas; Folículo; Ganadería; Maestría; Male effect; Ewes; Anestrus; Gonadotropins; Follicle.
Ano: 2012
URL: http://hdl.handle.net/10521/1779

Follicular-Stromal Interaction in Mare Ovary During the Reproductive Cycle
Provedor de dados: 77
Autores: Smok S,Carolina; Rojas R,Mariana.
Ovogenesis and foliculogenesis in the mare differ from other farm animals and therefore, gamete manipulation, in vitro fertilization and embryo transfer have been very difficult. The histologic traits of ovaries from 12 mares, in estrus and diestrus were studied. Number and size of follicules and corpora lutea were recorded. The ovarian stroma was evaluated using the pricosirius technique for collagen. A simple morphometric analysis was done using computerized scanner programs. During late estrus, one dominant follicle (46 ± 4mm) is seen. The surrounding stroma contains collagen I and III. By the end of the estrus, one hemorrhagic follicle is seen, plus one or two small follicle (2 mm in size). In early diestrus there is a corpus luteum (43-60 mm) and some...
Tipo: Journal article
Palavras-chave: Follicle; Stroma; Mare ovary; Seasonality.
Ano: 2010
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022010000300007

The Differences Among Lines on Oviduct and Cumulative Follicle Weight in Laying Hens
Provedor de dados: 19
Autores: 三好, 俊三; 高橋, 洋明; ルック, キィウ　ミン; 口田, 圭吾; 光本, 孝次.
Palavras-chave: 卵管; 膨大部; 卵巣; 黄色卵胞; 採卵鶏; Oviduct; Magnum; Ovary; Follicle; Laying hen.
Ano: 1996
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/444

Comparison of Bacterial Endotoxin Lipopolysaccharide Concentrations in the Blood, Ovarian Follicular Fluid and Uterine Fluid: A Clinical Case of Bovine Metritis
Provedor de dados: 19
Autores: MAGATA, Fumie; ISHIDA, Yoshikazu; MIYAMOTO, Akio; FURUOKA, Hidefumi; INOKUMA, Hisashi; SHIMIZU, Takashi; 宮本, 明夫; 古岡, 秀文; 猪熊, 壽; 清水, 隆.
We investigated the concentration of the bacterial endotoxin lipopolysaccharide (LPS) in the blood, ovarian follicular fluid and uterine fluid of a clinical case of bovine metritis. A 2-year-old lactating Holstein cow exhibited continuous fever &gt;39.5°C for more than 2 weeks after normal calving. The cow produced a fetid, watery, red-brown uterine discharge from the vagina and was diagnosed with metritis. The LPS concentrations in plasma and uterine fluid were 0.94 and 6.34 endotoxin units (EU)/ml, respectively. One of seven follicles showed an extremely high level of LPS (12.40 EU/ml) compared to the other follicles (0.62–0.97 EU/ml). These results might suggest the presence of high concentration of LPS in follicles in cows with postpartum metritis.
Palavras-chave: Dairy cow; Follicle; Lipopolysaccharide; Metritis.
Ano: 2015
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/4043

ウシ卵巣における糖質コルチコイドの生理的役割の評価
Provedor de dados: 19
Autores: 手塚, 雅文.
平成13年度～平成14年度科学研究費補助金（基盤研究C2））研究成果報告書13660277
Palavras-chave: 11β-HSD; Follicle; Corpus luteum; Cattle.
Ano: 2003
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/781

Gene Expression of 11β-HSD and Glucocorticoid Receptor in the Bovine (Bos taurus) Follicle During Follicular Maturation and Atresia : The Role of Follicular Stimulating Hormone
Provedor de dados: 19
Autores: TETSUKA, Masafumi; NISHIMOTO, Hiromi; MIYAMOTO, Akio; OKUDA, Kiyoshi; HAMANO, Seizo; 手塚, 雅文; 宮本, 明夫.
Glucocorticoids modulate ovarian function in cattle. However, their regulatory mechanisms have not been fully elucidated. In the present study, we examined gene expression of two glucocorticoid-metabolizing enzymes, a bidirectional 11β-HSD type 1 (11HSD1) and a dehydrogenase 11β-HSD type 2 (11HSD2), and glucocorticoid receptor (GR) in bovine follicles during follicular maturation and atresia. Granulosa cells (GCs) and theca interna layers (TIs) were harvested from follicles classified as small growing, dominant, preovulatory, early atretic and late atretic follicles. The expression levels of 11HSD1, 11HSD2 and GR mRNA were quantified by real-time PCR. In the healthy follicles, expression of 11HSD1 mRNA increased as follicles matured, both in GCs and TIs. A...
Palavras-chave: Bovine; Cortisol; 11β-HSD; Follicle; Glucocorticoid receptor; MRNA.
Ano: 2010
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2810

Incidence of apoptotic cells after vitrification in canine ovarian tissues
Provedor de dados: 19
Autores: Hariya, Madoka; Suzuki, Hiroshi.
Although vitrification and follicular survival subsequent to xenotransplantation of canine ovarian tissues have been reported, the degree of cryoinjury after the vitrification has not yet been fully examined. Since cryoinjury after vitrification of ovaries has been reported in bovine and humans, this study evaluated canine ovarian tissues after vitrification by immunohistochemistry and TUNEL assay. Ovaries were collected from immature bitches. The ovarian tissue cubes were pretreated with 1 M DMSO. Subsequently, DAP 213 solution (2 M DMSO, 1 M acetamide, 3 M propylene glycol) was added. The cryotubes containing the ovarian tissues were placed on ice for 5 min, then plunged directly into liquid nitrogen. After warming with 0.25 M sucrose, cryopreserved...
Palavras-chave: Cryopreservation; Dog; Follicle; Ovary.
Ano: 2016
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/4535

In Vivo Evidence that Local Cortisol Production Increases in the Preovulatory Follicle of the Cow
Provedor de dados: 19
Autores: ACOSTA, Tomas J.; TETSUKA, Masa; MATSUI, Motozumi; SHIMIZU, Takashi; BERISHA, Bajram; SCHAMS, Dieter; MIYAMOTO, Akio; 松井, 基純; 清水, 隆; 宮本, 明夫.
The aim of the present in vivo study was to monitor real-time fluctuations of cortisol (Cr) in the wall of preovulatory follicles using a microdialysis system (MDS) implanted in the theca layer as well as changes in ovarian venous plasma (OVP) and jugular venous plasma (JVP). Seven cows were superovulated using FSH and prostaglandin F2α injections. Dialysis capillary membranes were surgically implanted into the theca layer of mature follicles and connected to a microdialysis system. Fractions of the perfusates were collected from Day -1 (Day 0=LH surge) to Day 3. No difference in the concentrations of Cr between JVP and OVP was detected throughout the experiment. Circulating concentrations of Cr ranged from 20 to 35 ng/ml 8 h after surgery in ovulatory and...
Palavras-chave: Bovine; Cortisol; Follicle; Ovary; Ovulation.
Ano: 2005
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2980

Immunoreactivity for Gonadotropin-Releasing Hormone in Microdialyzed Perfusates of Bovine Mature Follicles In Vitro
Provedor de dados: 19
Autores: Ozawa, Takahiro; Acosta, Tomas J.; Nakamura, Tadashi; Miyamoto, Akio; 中村, 正; 宮本, 明夫.
The presence of gonadotropin-releasing hormone (GnRH)-like protein has been previously demonstrated in the bovine follicle. This GnRH-like protein was purified and concluded to be histone H2A. However, neither GnRH peptide nor specific GnRH-immunoreactivity (GnRH-IR) has been demonstrated in the bovine follicle so far. Thus, this study focused on the detection of specific GnRH-IR using the second-antibody enzyme immunoassay in isolated bovine mature follicles, and on an examination of the direct effect of luteinizing hormone (LH), endothelin-1 (ET-1), and cytokines on the GnRH-IR using an in vitro microdialysis system (MDS). We further examined a cross-reactivity of the GnRH antibody with bovine histone H2A. GnRH-IR was detected in microdialyzed perfusate...
Palavras-chave: GnRH; Immunoreactivity; Microdialysis; Follicle; Cow.
Ano: 2000
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2970

Genital  Blood Flow and Endometrial Gene Expression During the Preovulatory Period after Prostaglandin F2α-Induced Luteolysis in Different Luteal Phases in Cows
Provedor de dados: 19
Autores: JORDAN, Anne; HERZOG, Kathrin; ULBRICH, Susanne E; BEINDORFF, Nicola; HONNENS, Änne; KRÜGER, Lars; MIYAMOTO, Akio; BOLLWEIN, Heinrich; 宮本, 明夫.
The aim of this study was to examine the hypothesis that follicular and uterine perfusion as well as endometrial gene expression during the ovulatory period differs after induction of luteolysis during the 1st follicular wave compared with the 2nd wave or in intact cycle. Nine healthy non-lactating Holstein-Friesian cows were examined during three estrous cycles. A prostaglandin F2α analogue (PGF) was administered randomly either on Day 7 (1st wave cycle) or Day 11 (2nd wave cycle) after detection of ovulation (=Day 1). No hormonal treatment was used in the intact cycle with spontaneous ovulation. Transrectal Doppler sonography was conducted daily after PGF injection and in the intact cycle beginning on Day 18 of the estrous cycle until ovulation....
Palavras-chave: Blood flow; Cow; Endometrial receptors; Follicle; Prostaglandin F2α.
Ano: 2009
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2813

Increased iNOS gene expression in the granulosa layer of F1 follicle of over-fed and under-fed broiler breeder hens
Provedor de dados: 89
Autores: Sheikh Ahmadi,A; Zaghari,M; Shivazad,M; Hassanpour,H; Towhidi,A.
To clarify the effects of high (20 and 40% more than normal) and low (20% less than normal) daily feed allowance on egg and body parameters, ovarian morphology and plasma glucose, cholesterol, triacylglycerol, leptin-like hormone, nitrite/nitrate and gene expression of inducible nitric oxide synthase (iNOS) in the granulosa layer of F1 follicle, broiler breeder hens (30-week-old) were fed for 30 days. Egg and body parameters significantly changed between treatments (p&lt;0.05). Effect of different level of feed intake on ovarian morphology parameters was significant (p&lt;0.05), except for white follicles. After 30 days of experiment, plasma nitrite/nitrate (as a index of plasma nitric oxide) and leptin-like hormone increased in FI+20% and FI+40% groups as...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Broiler breeder; Follicle; Leptin-like hormone; Nitric oxide; Over/under-fed.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2010000400004

EFFECTS OF VITAMIN E SUPPLEMENTATION ON SERUM HORMONES AND GENE EXPRESSION OF ANTI-SEASON BREEDING XINGGUO GREY GEESE (ANSER CYGNOIDES)
Provedor de dados: 89
Autores: Yin,L; Ran,J; Lian,T; Yang,C; Li,S; Liu,Y.
ABSTRACT The objective of this study was to analyse the impact of dietary vitamin E supplementation on laying performance, serum reproductive hormones concentration and gene expression in ovary and follicles of anti-season breeding goose. A total of 210 anti-season breeding geese were divided into seven treatments with six replications. Each group was supplied with diets containing different vitamin E (DL-α-tocopherol acetate) contents (0, 10, 20, 40, 80, 160, 320mg/kg). We observed that the egg production and laying rate improved significantly at doses of 10 and 80 mg/kg, while the highest egg weight appeared in the 320 mg/kg group. Meantime, 80 mg/kg of vitamin E supplementation significantly improved the concentration of follicle-stimulating hormone...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Vitamin E; Reproductive hormones; Ovary; Follicle; Dicer.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2019000400310

Embryo development and follicular status of Toggenburg does fed urea diet
Provedor de dados: 96
Autores: Amorim,Lincoln da Silva; Torres,Ciro Alexandre Alves; Siqueira,Luiz Gustavo Bruno; Fonseca,Jeferson Ferreira da; Guimarães,José Domingos; Carvalho,Giovanni Ribeiro de; Alves,Nadja Gomes; Oliveira,Margarida Maria Nascimento Figueiredo de.
The effects of feeding urea on embryo production, quality and developmental stages and follicular status at the beginning of a superovulatory treatment of Toggenburg does fed urea diet were investigated in this study. Eighteen females were randomly allocated to receive diets with: no urea (control, n=8), and 2.4% urea dietary dry matter (n=10) UDM. The embryo recovery was performed at day 7 or 8 of estrus cycle by transcervical technique and classified according to quality and developmental stage. The follicular status was determined by transrectal ultrasonography at the first day of FSH injection. The number and quality of embryos were not affected by dietary urea concentration. Embryos from does treated with 2.4% UDM were recovered at advanced stage....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Embryo; Follicle; Goat; Superovulation; Urea.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000200007

Oocyte development in cattle: physiological and genetic aspects
Provedor de dados: 96
Autores: Britt,Jack H.
Oocytes in cattle are formed during embryogenesis and develop within individual follicles in the cortex of the ovary. Dormant primordial follicles become active and undergo progressive development at regular intervals commencing during the late fetal stage and continuing throughout adulthood. Once activated, follicles and oocytes in a cohort either grow to maturation and ovulation or undergo atresia, ultimately depleting the ovaries of germ cells. It takes an estimated 100 days for a follicle and its oocyte to reach the mature ovulatory stage. Within an individual, number of follicles in one ovary is similar to number in the other ovary; however, there are large differences among individuals in total number of follicles present in both ovaries. In...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bovine; Follicle; Ovary; Oocyte; Embryo; Fecundity.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982008001300013

ผลของวิธีการให้อาหารแบบขั้นบันไดในระยะวงรอบการเป็นสัดต่อการพัฒนาฟอลลิเคิลและคุณภาพของโอโอไซต์ของแม่แพะพื้นเมืองไทย
Provedor de dados: 106
Autores: Jaruk Nutthakornkul; Chainarong Navanukraw; Parwadee Pakdee; Chalong Wachirapakorn; Krittiya Lertchunhakiat.
Objective of this study was to determine the effect of stair-step feeding regimen during estrous cycle on follicular development and oocytes quality. Sixteen Thai-native non pregnant goats were used with the average age and body weight of 8 months and 17±0.6 kg, respectively. The does exhibited at least 2 normal estrous cycle and were housed in 1 m2 steel cages. Heat detection was daily recorded using a vasectomized buck. The does were randomly assigned into two groups: Control and Stair-step feeding group. In the control group, does were fed 100% of nutrients requirement for growth in puberty periods. Does consumed Ruzi grass hay, DM = 500 g/head/d and concentrate supplemented at 1% of body weight. Total feed intake was 670 g/head/d, (ME = 1.48 Mcal/kg/d,...
Tipo: Collection
Palavras-chave: Thai-native goats; Stair-step feeding regimen; Follicle; Oocyte; Estrous cycle; Feed intake; แพะ; พันธุ์พื้นเมืองไทย; ฟอลลิเคิล; โอโอไซต์; การให้อาหารแบบขั้นบันได; การกินอาหาร; ความต้องการโภชนะ; การเจริญเติบโต.
Ano: 2011
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5275

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

Ultrastructure of ovarian follicular epithelium of the Amazonian fish Pseudotylosurus microps (Teleostei: Belonidae): morphological and histochemical characterization of the intercellular deposits
Provedor de dados: 57
Autores: CRUZ-LANDIM,C.; CRUZ-HÖFLING,M. A.
The present paper reports the presence of great quantities of electrondense intercellular material in the follicular epithelium of P. microps. The material apparently is uptaken from circulation and enter the follicle through the intercellular spaces accumulating in the epithelial median-apical intercellular spaces and in perioocytic space. The accumulation starts in the early growth of the primary oocyte and proceed until vitellogenesis. The possible chemical nature and function of the deposits are discussed.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chorion; Oocytes; Oogenesis; Electrondense deposits; Follicle.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082001000100017

Synchronization of ovulation in crossbred dairy heifers using gonadotrophin-releasing hormone agonist, prostaglandin F2a and human chorionic gonadotrophin or estradiol benzoate
Provedor de dados: 56
Autores: Castilho,C.; Gambini,A.L.G.; Fernandes,P.; Trinca,L.A.; Teixeira,A.B.; Barros,C.M.
Girolando (Gir x Holstein) is a very common dairy breed in Brazil because it combines the rusticity of Gir (Bos indicus) with the high milk yield of Holstein (Bos taurus). The ovarian follicular dynamics and hormonal treatments for synchronization of ovulation and timed artificial insemination were studied in Girolando heifers. The injection of a gonadotrophin-releasing hormone (GnRH) agonist was followed 6 or 7 days (d) later by prostaglandin F2&lt;FONT FACE="Symbol"&gt;a&lt;/FONT&gt; (PGF2&lt;FONT FACE="Symbol"&gt;a&lt;/FONT&gt;). Twenty-four hours after PGF2&lt;FONT FACE="Symbol"&gt;a&lt;/FONT&gt; injection either human chorionic gonadotropin (hCG, GPh-d6 and GPh-d7 groups) or estradiol benzoate (EB, GPE-d6 and GPE-d7 groups) was administered to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Follicle; Corpus luteum; Ovulation; HCG; GnRH; Artificial insemination.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2000000100013

Different times to perform timed artificial insemination when using a P4/E2/eCG-based protocol in buffalo
Provedor de dados: 65
Autores: Carvalho,Nelcio Antonio Tonizza de; Carvalho,Júlia Gleyci Soares de; Sales,José Nélio de Sousa; Macari,Rodrigo Caron; Baruselli,Pietro Sampaio.
ABSTRACT: The aim of this study was to evaluate different times for timed artificial insemination (TAI) in buffalo submitted to a P4/E2/eCG-based protocol. In this study, 204 buffaloes were distributed into one of two groups (TAI56, n=103 and TAI64, n=101). At a random stage of the oestrous cycle (Day 0 = D0), in the morning (TAI56, a.m.) or afternoon (TAI64, p.m.), buffaloes received an intravaginal progesterone device (P4; 1.0 g) plus EB (2.0 mg i.m.). On D9 a.m. (TAI56) or p.m. (TAI64), the P4 was removed and buffaloes received PGF2a (0.53 mg i.m. sodium cloprostenol) and eCG (400 IU i.m.). On D10 a.m. (TAI56) or p.m. (TAI64), 24 h after P4 removal, buffaloes were treated with EB (1.0 mg i.m.). Buffaloes from TAI56 and TAI64 were inseminated 56 and 64 h...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anoestrous; Artificial insemination; Oestradiol benzoate; Follicle; Induction of ovulation.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782020000400701