Consulta: subjectFacets:"Testis"
Registros recuperados: 54
Data/hora: 04/06/2024 02:46:49

A transcriptome analysis of mitten crab testes (Eriocheir sinensis)
Provedor de dados: 74
Autores: Zhang,Wei; Wan,Haolei; Jiang,Hui; Zhao,Yunlong; Zhang,Xiaowei; Hu,Songnian; Wang,Qun.
The identification of expressed genes involved in sexual precocity of the mitten crab (Eriocheir sinensis) is critical for a better understanding of its reproductive development. To this end, we constructed a cDNA library from the rapid developmental stage of testis of E. sinensis and sequenced 3,388 randomly picked clones. After processing, 2,990 high-quality expressed sequence tags (ESTs) were clustered into 2,415 unigenes including 307 contigs and 2,108 singlets, which were then compared to the NCBI non-redundant (nr) protein and nucleotide (nt) database for annotation with Blastx and Blastn, respectively. After further analysis, 922 unigenes were obtained with concrete annotations and 30 unigenes were found to have functions possibly related to the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Reproduction; Testis; EST; Eriocheir sinensis.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572011000100024

PACT/PRKRA and p53 regulate transcriptional activity of DMRT1
Provedor de dados: 74
Autores: Fujitani,Kazuko; Otomo,Asako; Nagayama,Yuto; Tachibana,Taro; Kato,Rika; Kawashima,Yusuke; Kodera,Yoshio; Kato,Tomoko; Takada,Shuji; Tamura,Kei; Takamatsu,Nobuhiko; Ito,Michihiko.
Abstract The transcription factor DMRT1 (doublesex and mab-3 related transcription factor) has two distinct functions, somatic-cell masculinization and germ-cell development in some vertebrate species, including mouse and the African clawed frog Xenopus laevis. However, its transcriptional regulation remains unclear. We tried to identify DMRT1-interacting proteins from X. laevis testes by immunoprecipitation with an anti-DMRT1 antibody and MS/MS analysis, and selected three proteins, including PACT/PRKRA (Interferon-inducible double-stranded RNA dependent protein kinase activator A) derived from testes. Next, we examined the effects of PACT/PRKRA and/or p53 on the transcriptional activity of DMRT1. In transfected 293T cells, PACT/PRKRA and p53...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: P53; DMRT1; Germline stem cell; Testis; Xenopus.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572020000400702

Organization of the cysts in bee (Hymenoptera, Apidae) testis: number of spermatozoa per cyst
Provedor de dados: 76
Autores: Cruz-Landim,Carminda da.
The morphology of the cyst cells in Apis mellifera Linné, 1758, Scaptotrigona postica Latreille, 1804, and Melipona bicolor bicolor Lepeletier, 1836 testis, as well as the average number of spermatic cells are reported. The data indicates a supporting and nourrishing role of the cyst cells to the developing cystocytes. The counts of immature spermatozoa in the cysts show an average of 202.8 ± 21.2 spermatozoa for A. mellifera, 117.4 ± 8.68 for S. postica and 88.8 ± 15.57 for M. bicolor, which predict the occurrence of 8 mitotic cycles in the cystocytes of A. mellifera and 7 in the meliponines, considering that only one spermatozoom originates of each final spermatogonium.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cyst cell; Cell number average; Testis; Bees.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212001000200025

Morphology and dynamics of male gametogenesis in Sympterygia bonapartii (Chondrichthyes, Rajidae) from Northern Patagonia
Provedor de dados: 76
Autores: Moya,Ana C.; Andrade,María C. Díaz; Galíndez,Elena J.
ABSTRACT The smallnose fanskate, Sympterygia bonapartii Müller &amp; Henle, 1841 is one of the most disembarked items in commercial harbors in Argentina. In this work, the microscopic architecture of mature male gonads and the dynamics of cysts development are analyzed as a contribution to awareness of the reproductive biology of the species. Some biological data related to reproduction are given as well. Two seasons were sampled (fall and spring) and length classes's frequency distribution and maturity stages frequency distribution are given. Size at first sexual maturation for males was estimated at 57 cm of total length. Testes are symmetric, peer, lobed, with several germinal zones. Inside the gonads, there are many spermatocysts, containing...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Histology; Testis; Smallnose fanskate; Spermatogenesis.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212015000300316

Anatomical Study on the Descent of Testis in Prenatal Goat (Capra hircus)
Provedor de dados: 77
Autores: Farooqui,M. M; Archana,Chandrapal; Prakash,Ajay.
A study was conducted on 70 embryo/ foetii of goats to observe the descent of testis. These foetii were grouped into I (0-30 days), II (31-60 days), III (61-90 days), IV (91-120days) and V (121 days up to term, having 14 embryos/ foetii in each group. The genital ridge was observed at 1.2cm CRL (23 day) on the ventromedial aspect of mesonephros. At 42nd day, the genital ridge developed into cylindrical structure, the testis, located in the middle of metanephros. The abdominal migration was completed upto 88th day. The testes were situated in the inguinal canal from 89th to 95th day. From 90th day onward, scrotal migration had been observed, however the testis did not reach the base of the scrotum up to term. During the descent of testis, a peritoneal fold...
Tipo: Journal article
Palavras-chave: Anatomy; Testis; Gubernaculum; Goat.
Ano: 2011
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022011000200002

Morphological, Stereological and Histometrical Assessment of the Testicular Parameters between Holstein and Simmental Bulls
Provedor de dados: 77
Autores: Akosman,Murat Sirri; Lenger,Ömer Faruk; Demirel,Hasan Hüseyin.
The testicular measurement is important criteria for experimental researches especially in toxicological studies and the prediction of spermatogenesis. In light of this knowledge, we aimed to estimate and compare these parameters in two different kinds of cattle breeds. The gross anatomical measurements were performed by vernier caliper, volume of the testis was estimated by Cavalieri method and seminiferous tubule diameter was measured on the histological sections by software-loaded computer attached to microscope. The mean testis weight, length, width, volume, and tubule diameter of the Simmental bulls and the Holstein bulls measured as 316 g, 12.1 cm, 6.9 cm, 295 cm3 and 226.68 µm and 299 g, 12.1 cm, 6.8 cm, 285 cm3 and 223.44 µm, respectively. In...
Tipo: Journal article
Palavras-chave: Bull; Cavalieri method; Seminiferous tubule; Testis; Volume.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022013000300048

Propolis Protective Role Against Morphological, Hormonal Biochemical and Histological Alterations Induced by Sildenafil Overdoses
Provedor de dados: 77
Autores: Almansour,Mansour; Jarrar,Yazun; Jarrar,Bashir.
Sildenafil is widely used for the treatment of erectile dysfunction with few studies are available on the protective role of propolis against its reproductive toxicity. The present study aims to investigate the hormonal biochemical and histomorphometric alterations induced in the testicular tissues by sildenafil overdoses. Four groups of rabbits were exposed to sildenafil with or without propolis as follows: Group I received the formulated vehicle, Group II received sildenafil (3 mg/kg), Group III received propolis (50 mg/kg), Group IV received sildenafil plus propolis. Sildenafil lowered body weight gain, testosterone and follicular stimulating hormone concentration but increased testis index while luteinizing hormone was almost not affected. Moreover,...
Tipo: Journal article
Palavras-chave: Propolis; Sildenafil; Testis; Histological alterations; Toxicity.
Ano: 2016
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022016000200020

Histological and Morphometric Analysis of Testes of Adult Quail (Coturnix coturnix japonica) of Bangladesh
Provedor de dados: 77
Autores: Shil,Subrata Kumar; Quasem,Md. Abul; Rahman,Mohammad Lutfur.
A histological and morphometric study was conducted to evaluate the seasonal testicular variations in the adult Japanese quail (Coturnix coturnix japonica) in Bangladesh. The weight of birds and testes, volume, length, circumference, seminiferous tubule diameter, circumference and height of germinal epithelium of testes were measured. Sections of testes obtained from studied birds were stained with H&amp;E and images were taken by J software. Weight and volume of paired testes of quails significantly heavier (P&lt;0.05) in long day period of summer and rainy season (March ­ September) than the short day period of autumn and winter (October ­ February). Seasons had no significant effect on live weight gain of quails. The weight and diameter of testes or...
Tipo: Journal article
Palavras-chave: Japanese quail; Morphometry; Testis; Season; Day length; Temperature.
Ano: 2015
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022015000100017

Effect of Photoperiod and Melatonin on Volume and Cellular Parameters of Testis in Pinealectomized Rats
Provedor de dados: 77
Autores: Akosman,Murat Sirri; Özdemir,Vural; Taskiran,Nihal; Akalan,Mehmet Aydin; Bülbül,Aziz.
Mammalian reproductive axis is regulated by the combination of three fundamental tissues of neuroendocrine system including hypothalamus, hypophysis and gonads. In recent years, pineal gland has been included in this axis. The aim of the present study was to investigate the effect of 12L (Light):12D (Dark) photoperiod and melatonin administration (0.5 mg/kg/day; subcutaneously) on testicular volume and cellular parameters of testis at the pinealectomized (PE) rats. For this aim, twelve adult rats were firstly pinealectomized and then divided into two groups as GI and GII randomly. The GI rats served as control group and received only normal saline, whereas GII rats were the melatonin administered group. It was found that the total testicular volume,...
Tipo: Journal article
Palavras-chave: Cavalieri Method; Melatonin; Optical Fractionator; Pinealectomy; Stereology; Testis.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022013000300046

Anatomical Study on Domestical Fowl (Gallus domesticus) Reproductive System
Provedor de dados: 77
Autores: Bull,Marilena Longo; Martins,Márcia Regina Fernandas Boaro; Dalva Cesário,Maria; Padovani,Carlos Roberto; Mendes,Ariel Antonio.
Lately, researchers have taken into consideration studies on birds since they represent an excellent nutritional source. There are several classical descriptions of the male reproductive tract, always aiming at establishing a correlation with shape, testicular size, age and sexual maturity. This study analyzed 50 male Gallus domesticus, 1 to 64 weeks old. The birds were collected with 10 days and then weekly until 24 weeks, following 37, 48, 59 and 64 weeks, and sacrificed by cervical displacement. It was observed the sintopies of testis with the other organs. Further, it was done the testicular measurement and then the statistical analysis by following the model of testis weight variation due to the animal age. Our results showed that the maximum weight...
Tipo: Journal article
Palavras-chave: Anatomy; Testis; Fowl.
Ano: 2007
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022007000400007

Effects of Chronic Simulated Hypobaric Hypoxia on Mouse Spermatogenesis
Provedor de dados: 77
Autores: Bustos-Obregón,Eduardo; Esveile,Christian; Contreras,Julio; Maurer,Inge; Sarabia,Luis.
Reduction of O2 delivery to tissues damage them, including the seminiferous epithelium. Recently, population working in high altitude has increased, so that the study of hypobaric hypoxia on spermatogenesis becomes of interest. In this study we used two groups of male, sexually mature mice Control (C) (540 meters above sea level (masl)) and chronic simulated hypobaric hypoxia (CSHH) (4,600 masl) exposed during 8, 16, 24 or 33 days. Hematocrit; reticulocytosis; testicular, epididymal and seminal vesicle weight; seminiferous epithelium height, tubular diameter, sperm count and morphology and testicular parenchyme and spermatozoa membranes lipoperoxidation were measured. Weight of testis, epididymis and seminal vesicle were reduced but they recuperate at 33...
Tipo: Journal article
Palavras-chave: Hypoxia; Lipoperoxidation; Mouse; Testis.
Ano: 2006
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022006000400030

Unilateral Cryptorchidism in Nigerian Sahel Bucks
Provedor de dados: 77
Autores: Igbokwe,I. O; Grema,H. A; Ikpo,A. E; Mshelbwala,F. M; Igbokwe,N. A.
Out of 1608 Nigerian Sahel male goats (bucks) examined for cryptorchidism in an abattoir, 9 (0.6%) had right unilateral cryptorchidism. The coat colour-specific prevalence was highest among the brown bucks (2.1%); and was 0.8%, 0.6%, and 0.3% among black, white, back-and-white bucks, respectively. The condition was not found among bucks with brown-and-black, brown-and-white, and multiple coat colours. The right and left testes of normal bucks and the descended testes of cryptorchid bucks had comparable gross testicular measurements, but the retained cryptorchid testes were smaller in size. The estimates of the testicular measurements showed that testicular weights (with the entire epididymes), peripheral longitudinal lengths and mid-circumferences of the...
Tipo: Journal article
Palavras-chave: Abdominal; Cryptorchidism; Goat; Hypoplasia; Morphometry; Nigeria; Sahel; Subcutaneous; Testis; Unilateral; Degeneration; Orchitis; Fibroplasia.
Ano: 2009
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022009000300027

A Study of the Staining Effect of Roselle (Hibiscus sabdariffa) on the Histologic Section of the Testis
Provedor de dados: 77
Autores: Egbujo,E. C.; Adisa,O. J; Yahaya,A. B.
This study describes the preparation and use of Roselle (Hibiscus sábddariffa) for the differential staining of testicular tissue sections to find out its staining effect on nuclear, cytoplasmic and other structures. Various treatments using modifications of the plant extract in water were carried out on sections of the rabbit testis. Various levéis of differentiation of nuclear and cytoplasmic structures as well as other structures of this organ was obtained especially when 1% eosin was applied as a counter stain. The best staining result was obtained when iron alum was used to mordant the extract and when the extract, mordanted with potassium alum was acidified using acetic acid and used to stain the sections. Modification of the aqueous extract to an...
Tipo: Journal article
Palavras-chave: Hibiscus sabdariffa; Staining; Testis; Histologic section.
Ano: 2008
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022008000400022

Postnatal Development of Testis in Gaddi Goat (Capra hircus)
Provedor de dados: 77
Autores: Archana,P; Katiyar,R. S; Sharma,D. N; Farooqui,M. M; Prakash,Ajay.
A study was conducted on the testicles of 30 male Gaddi goats, divided into 3 groups viz; prepubertal (0 day to 18 months), pubertal (&lt;18 months to &amp;gt;5 yrs) and post- pubertal (&amp;gt;5 yrs) ages. The study revealed that the testis was covered by fibroserous tunica albuginia having outer fibrous layer and inner vascular layer with smooth muscle fibers at birth. The tunica albuginia continuously grew in thickness from prepubertal to postpubertal animals. The septula testis arising from the tunica albuginia, divided the parenchyma in lobules and converged at mediastinum testis. Few differentiated and undifferentiated Leydig cells were present in the intertubular spaces of neonates, which enormously increased in pubertal animals and replaced by...
Tipo: Journal article
Palavras-chave: Testis; Histology; Postnatal development; Goat.
Ano: 2014
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022014000100029

The Histo-morphometric Evidences of Vernonia amygdalina Leaf Extract-induced Testicular Toxicity
Provedor de dados: 77
Autores: Saalu,L. C; Akunna,G. G; Oyewopo,A. O.
Vernonia amygdalina (bitter-leaf) is native to West Africa but occurs mostly in its cultivated form in various parts of central and southern Nigeria. It is a dark-green leafy vegetable commonly used in cooking and as folkloric medicine for the management of several diseases in Nigeria. In the present study, the effects of varying doses of ethanolic leaf extract of Vernonia amygdalina on the rat testis histo-morphometry were investigated. Forty male wistar rats were divided into groups of four. Group A, as the control was given 10 ml/kg/day/oral distilled water while Group B, C and D subsequently treated with 100, 300 and 600 mg/kg/day/oral route Vernonia amygdalina leaves extract respectively for 56 days. Results showed that Group B rats had normal testis...
Tipo: Journal article
Palavras-chave: Vernonia amygdalina; Histology; Morphometry; Testis; Wistar rat.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022013000200052

Effect of Diet Contains Sesame Seed on Adult Wistar Rat Testis
Provedor de dados: 77
Autores: Amini Mahabadi,J; Hassani Bafrani,H; Nikzad,H; Taherian,A; Salehi,M.
Studies show that some antioxidants are effective in improving male infertility. According to several antioxidant compounds that exist in sesame seed, this study was designed and carried out to the effects of sesame seed diet consumption on adult male rats testis structure and sex hormones. This experimental study was carried out on 30 adults Wistar rat, 200 g that obtained from laboratory animal center at Kashan University of Medical Sciences. Rats were divided into experimental and control groups randomly. The control group received standard diet and experimental group received diet containing 70% standard diet and 30% sesame seed after weaning for 12 weeks. At the end of the study, testis weight and volume were measured and seminiferous tubules; lumen...
Tipo: Journal article
Palavras-chave: Sesame seed; Testis; Rat; Sex hormones.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022013000100033

Morphometric Analysis of Mice Testicular Tubules after Administration of Malathion and Maca
Provedor de dados: 77
Autores: Bustos-Obregón,Eduardo; del Río,Fernando Costa; Sarabia,Luis.
Organophosphoric (OP) agropesticidas are amply used to increase food production. However, it has been verified that they induce alterations at testicular level related to the diminution of fertility in humans as in animals. On the other hand, different studies have been made to develop chemical or natural compounds that can induce an antagonistic effect to OP. In previous studies an extract from a plant, from the Peruvian Andes (Maca) has been recognized by its stimulating action on spermatogenesis. In the present study the effects of both external agents were evaluated on testicular sections of testis of adult male mice on a population of 52 mice CF1, divided at random in 4 groups (Control, Malathion, Maca, Malathion-Maca), with sacrifice intervals of...
Tipo: Journal article
Palavras-chave: Testis; Morphometry; Mice; Malathion; Maca.
Ano: 2007
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022007000200001

Pineal Gland Plays a Role in Gonadal Development after Eyelids Separation in Puppies
Provedor de dados: 77
Autores: Abou-Easa,Khalil; El-Magd,Mohammed Abu; Tousson,Ehab; Hassanin,Amin; Shukry,Mustafa; Salama,Mohammed.
Several functional and morphological studies have been conducted on the pineal gland in many mammalian species; however, no published reports are available on the role of pineal gland on the gonadal development before and after eyelids separation in puppies. Therefore, this study aimed to trace the postnatal histo-morphological changes in the pineal gland and gonads of puppies before (2, 10 and 11 days old) and after (25, 35 and 40 days old) eyelids separation in an attempt to investigate the possible role of pineal gland on the gonadal development. In general, the differentiation of pineal cells, interstitial endocrine cells of testes and stromal ovarian cells coincides with the start of eyelids separation in puppies. Histological examination of stained...
Tipo: Journal article
Palavras-chave: Pineal; Testis; Ovary; Puppy; Eyelids separation.
Ano: 2015
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022015000100001

Malathion Affects Spermatogenic Proliferation in Mouse
Provedor de dados: 77
Autores: Penna-Videau,S; Bustos-Obregón,E; Cermeño-Vivas,J. R; Chirino,D.
The restriction of the mechanisms of cell proliferation in murine seminiferous epithelium, in terms of induction of programmed cell death until recently has not been fully analyzed. The aim of this work was to assess the effect of Malathion (MP) on testicular morphology and function in mouse spermatogenesis. For the experiments, male albino mice of strain NMRI-IVIC, weighing between 30-40 g were used, and divided into control and experimental groups of 5 each. The animals of the experimental groups were injected with a single dose of MP: 241mg/kg weight (1/12 LD 50 ) resuspended in 0.9% saline, intraperitoneally. Animals were sacrificed at 8.3, 16.6 and 33.2 days post-injection (first, second and third spermatogenic cycles). Testicular samples were...
Tipo: Journal article
Palavras-chave: Malathion; Testis; Mouse; Apoptosis; Morphology; P53; Proliferation.
Ano: 2012
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022012000400023

Sesame radiatum Phytoestrogens Stimulate Spermatogenic Activity and Improve Sperm Quality in Adult Male Sprague Dawley Rat Testis
Provedor de dados: 77
Autores: Shittu,Lukeman, A. J.; Shittu,Remilekun, K.; Adesite,Samson, O.; Ajala,M. Oluwole; Bankole,Munir, A.; Benebo,A. S.; Tayo,A. O.; Ogundipe,Olufemi, A.; Ashiru,Oladapo, A.
Increasing concern has been expressed about the declining sperm count of humans and the potential environmental effects of both synthetic and natural estrogenic endocrine disruptors (EEDs) on human reproductive health in the last few decades. However, due to paucity of knowledge, we evaluate the chronic reproductive toxicity of sesame phytoestrogenic lignans on the male Sprague Dawley (SD) rats' testis. Thirty adult male SD rats weighing 150-200g were divided into three groups. Two treated groups received a daily dose of aqueous leaves extract of Sesamum radiatum at 14.0 mg/kg bw and 28.0mg /kg bw respectively via gastric gavage, while equal volume of normal saline was administered to the control group for six weeks. Seminal analysis and hormonal assay...
Tipo: Journal article
Palavras-chave: Testis; Sesame leaves; Histopathology; Hormonal assay; Seminal analysis; SD Rats.
Ano: 2008
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022008000300022

The Ameriorating Effects of Grapefruit Seed Extract on Testicular Morphology and Function of Varicocelized Rats
Provedor de dados: 77
Autores: Saalu,,L. C; Udeh,R.; Oluyemi,K. A; Jewo,P. I; Fadeyibi,L. O.
Varicoceles are abnormal tortuosity and dilatation of the veins of the pampiniform plexus that drain the testis.The pathophysiology of testicular damage in varicocele has not been completely understood. However there is an increasing body of evidence pointing towards the role of reactive oxygen species and oxidative stress in the pathogenesis of varicocele related subfertility. In the present study we examined the role of proanthocynidin-rich ethanol extract of grapefruit seed as an antioxidant in protecting the testis against damage in experimental varicocele. Three groups of rats were constructed as the first group had intact rats; experimental bilateral varicoceles were established by complete ligation of the left and right main spermatic veins in the...
Tipo: Journal article
Palavras-chave: Varicocele; Grapefruit seed extract; Testis; Infertility.
Ano: 2008
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022008000400042

Protective Effects of Melatonin on Testicular Torsion and Detorsion Damage in Sprague-Dawley Rats
Provedor de dados: 77
Autores: Aktas,Ayfer; Tuncer,M. Cudi; Yildirim,Ayse; Nergiz,Yusuf; Akkus,Murat.
In this study, we evaluated the ultrastructural findings of testis with systemic administration of different doses of melatonin during ischemic period in a rat model of testicular torsion/detorsion (T/D). Testis ischemia-reperfusion (I/R) injury was induced by torsion of the left testis, with a 720 degrees twisting of the spermatic cord so as to produce a total occlusion of testis for 2.5 hours. Subsequently, the same testis was then detorsioned. According to surgical procedure in each group, unilateral orchiectomies were performed for histopathologic examination. The groups were labelled as control group, torsion group (T), torsion and detorsion group (T/D), torsion-detorsion and melatonin group (T/D+20,50 and 100 mg/kg melatonin). For the histological...
Tipo: Journal article
Palavras-chave: Testis; Torsion; Detorsion; Spraque-Dawley rat; Melatonin.
Ano: 2011
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022011000100001

Toxicological studies of Momordica charantia Linn Seed extracts in Male Mice
Provedor de dados: 77
Autores: Patil,Sharanabasappa A; Patil,Saraswati B.
An attempt to find out the male contraceptive molecule of plant origin, the extracts of seeds of Momordica charantia were tested in male mice. Petroleum ether, chloroform and ethanolic extracts of Momordica charantia were administered at the dose level of 25mg/100gm body weight to the albino mice for 48 days intraperitoneally. All the extracts showed antispermatogenic effect as the number of spermatogonia, spermatocytes, spermatids and spermatozoa were decreased. The increase in the weight of epididymis, prostate gland, seminal vesicle and vas deferens indicates clearly the androgenic property of these extracts. After subjecting to preliminary phytochemical screening ethanol extract showed positive tests for alkaloids, flavonoids, glycosides, phenols,...
Tipo: Journal article
Palavras-chave: Momordica charantia Linn; Toxicological; Androgenic; Testis; Spermatogenesis.
Ano: 2011
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022011000400024

Histological and Histochemical Studies on the Prenatal Development of Testis in Goat (Capra hircus)
Provedor de dados: 77
Autores: Farooqui,M. M; Archana,Chandrapal; Prakash,Ajay.
The study has been conducted on the prenatal development of testis on 70 goat embryo/foeti, categorized into group-I (0-30 days), Group-II (31-60 days), Group-III (61-90 days), Group-IV (91-120 days) and group V (121days-till birth), having 14 embryos/ foeti in each group. The genital ridge was observed at 23 days of gestation. It contained an accumulation of mesenchymal cells, immature RBC's, differentiating fibroblasts and primordial germ cells. The formation of sex cords was evidenced on 44th day of gestation. It contained small mesenchymal cells and large cells arranged in a chain like manner. The convolution of the sex cords started between 61-90 days of gestation, which increased with the increase in the gestation period and at 125 day of gestation...
Tipo: Journal article
Palavras-chave: Testis; Prenatal development; Goat.
Ano: 2012
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022012000400024

Histopathological changes in albino mouse testis induced by the administration of Tityus n. sp. venom
Provedor de dados: 79
Autores: PENNA-VIDEAÚ,S.; CERMEÑO-VIVAS,J.; MORENO-MARVAL,M.; QUIROGA-NOTTI,M.
Scorpion envenoming is a public health concern in northeastern Venezuela. Specimens of the genus Tityus are responsible for most of these. In experimental animals, Tityus venom produces histopathological changes in the skeletal muscle and pancreas, but its toxicity to the reproductive system has not been studied. The aim of this work is to describe the histopathological changes in testis and epididymis of albino mice induced by the administration of Tityus n. sp. venom. Sub-lethal doses of venom (3.75 mg/g mouse) were administered intramuscularly (IM) daily for 4 days. On the fifth day, the animals were sacrificed and the testes and epididymes were quickly removed and processed for light microscopy. The venom induced alterations in spermatogenesis. Sertoli...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Testis; Sertoli cell; Epididymis; Scorpion; Venom; Mouse; Histopathology.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-79302000000200003

A bradykinin-potentiating peptide (BPP-10c) from Bothrops jararaca induces changes in seminiferous tubules
Provedor de dados: 80
Autores: Gilio,Joyce M; Portaro,Fernanda CV; Borella,Maria I; Lameu,Claudiana; Camargo,Antonio CM; Alberto-Silva,Carlos.
Background The testis-specific isoform of angiotensin-converting enzyme (tACE) is exclusively expressed in germ cells during spermatogenesis. Although the exact role of tACE in male fertility is unknown, it clearly plays a critical function in spermatogenesis. The dipeptidase domain of tACE is identical to the C-terminal catalytic domain of somatic ACE (sACE). Bradykinin potentiating peptides (BPPs) from snake venoms are the first natural sACE inhibitors described and their structure-activity relationship studies were the basis for the development of antihypertensive drugs such as captopril. In recent years, it has been showed that a number of BPPs - including BPP-10c - are able to distinguish between the N- and C-active sites of sACE, what is not...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bradykinin-potentiating peptide; Snake venom; Angiotensin-converting enzyme; Testis; Seminiferous epithelium.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992013000100316

Anti-Müllerian hormone as an indicator of hemi-castrated unilateral cryptorchid horses
Provedor de dados: 19
Autores: MURASE, Harutaka; SAITO, Shigeaki; AMAYA, Tomohiko; SATO, Fumio; BALL, Barry Allen; NAMBO, Yasuo.
Anti-Müllerian hormone (AMH), a glycoprotein secreted from the fetal testis, is responsible for regression of the Müllerian duct in the male fetus. The aim of this study was to evaluate the usefulness of serum AMH as a biomarker for diagnosis of cryptorchidism in horses. Serum AMH concentrations were measured in intact stallions, hemi-castrated unilateral cryptorchid stallions, and geldings. In addition, expression of AMH was characterized in cryptorchid testes by immunohistochemistry. Serum AMH was detected in intact stallions (n=11, 13.3 ± 1.8 ng/ml) and in hemi-castrated cryptorchid stallions (n=8, 17.6 ± 3.0 ng/ml), but not in geldings (n=6, all data were below the limit of detection). Immunolabeling for AMH was detected in Sertoli cells of undescended...
Palavras-chave: Anti-Müllerian hormone (AMH); Cryptorchidism; Equine; Testis.
Ano: 2015
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/4151

Immunohistochemical Localization of Steroidogenic Enzymes in the Testis of the Sika Deer (Cervus nippon) During Developmental and Seasonal Changes
Provedor de dados: 19
Autores: HAYAKAWA, Daisuke; SASAKI, Motoki; SUZUKI, Masatsugu; TSUBOTA, Toshio; IGOTA, Hiromasa; KAJI, Koichi; KITAMURA, Nobuo; 佐々木, 基樹; 北村, 延夫.
Testicular steroidogenesis and spermatogenesis during developmental and seasonal changes were investigated in male sika deer (Cervus nippon), a short-day seasonal breeder, to clarify the physiological mechanisms for reproductive function. The immunohistochemical localization of steroidogenic enzymes (P450scc, P450c17, 3βHSD and P450arom), spermatogenesis and cell proliferation were analyzed in the testes of fetal (164 to 218 days of fetal age), fawn (0 years old), yearling (1 year old) and adult (more than 2 years old) male sika deer. Three kinds of steroidogenic enzymes, P450scc, P450c17 and 3βHSD, essential for the synthesis of testosterone were located only in the Leydig cells of the testes from the fetal period, and these localizations did not change...
Palavras-chave: Developmental change; Seasonal change; Sika deer; Steroidogenic enzyme; Testis.
Ano: 2010
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2816

Effects of low-protein diets supplemented with antioxidants on histopathology of testis and testosterone and performance of male Japanese quail ( Coturnix coturnix japonica )
Provedor de dados: 96
Autores: Mahmoodpour,Hamid; Vahdatpour,Sina; Jafargholipour,Mohamadali; Vahdatpour,Tohid.
ABSTRACT The present study sought to examine the effects of low-protein diets supplemented with natural and synthetic antioxidants on reproductive traits and performance of male Japanese quail. A total of 144 one-day-old quail chicks were randomly assigned to receive four different treatments, including a control diet (a basal diet) without antioxidant supplementation, low-protein diet without antioxidant supplementation, low-protein diet supplemented with the E-selenium antioxidant (a combination of vitamin E and selenium), and low-protein diet supplemented with the antioxidant Loxidan (a combination of propyl galat, ethoxyquin, and citric acid). Throughout the study, feed and water were provided ad libitum from one to 45 days of age. Performance values...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: E-selenium; Loxidan; Performance; Protein; Quail; Testis; Testosterone.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017000200123

Impact of feeding cottonseed coproducts on reproductive system of male sheep during peripubertal period
Provedor de dados: 63
Autores: Paim,Tiago do Prado; Viana,Pauline; Brandão,Eduardo; Amador,Samara; Barbosa,Tatiana; Cardoso,Caio; Lucci,Carolina Madeira; Souza,Jurandir Rodrigues de; McManus,Concepta; Abdalla,Adibe Luiz; Louvandini,Helder.
ABSTRACT Cottonseed coproducts contain gossypol which can have specific effects upon the male reproductive system. We evaluated the reproductive development of male lambs close to puberty fed on three cotton coproducts. Twenty-four 5-month old male lambs received four diets: 20 % of dry matter intake of whole cottonseed (WCS), high oil cottonseed meal (CSC), cottonseed meal (CSM), and a control group (CTL) without any cottonseed coproducts. Free gossypol intake was 16.32, 6.98, 5.47 and 0 mg kg−1 BW−1 d−1 for WCS, CSC, CSM and CTL, respectively. Every 15 days, the animals were weighted and serum and semen samples were collected. After 95 days, testis samples were collected for analysis under light and transmission electron microscopes. The CTL group had...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Gossypol; Sperm; Testis; Testosterone; Lamb.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162016000600489

Morphological study of the testes of the dove Columba livia (Gmelin) (Columbidae, Columbiformes)
Provedor de dados: 104
Autores: Maruch,Sandra Maria das Graças; Teles,Maria Eloiza de Oliveira; Ribeiro,Maria das Graças.
Known as "domestic dove", the Columba livia (Gmelin, 1789) is a columbidae species widely distributed in Brazil, whose reproductive biology has been studied by many researchers. The testes of 12 Columba livia males were collected and prepared for histologic examination under an optical microscope, the results of which were analysed and photographed. The tunica albuginea that covers the testes consists of a thick, not very cellular layer of dense connective tissue. Groups of interstitial cells with typical morphological appearance and surrounded by loose, well vascularized connective tissue are observable within the organ, between the seminiferous tubules. The seminiferous tubules are thick, intensely wound and, when seen in cross section, show Sertoli...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Columbidae; Birds; Genital apparatus; Testis.
Ano: 1995
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751995000100015

HISTOLOGICAL DESCRIPTION OF THE REPRODUCTIVE SYSTEM OF MALE AND FEMALE HATCHLINGS OF THE MAGDALENA RIVER TURTLE (Podocnemis lewyana)
Provedor de dados: 37
Autores: SÁNCHEZ-OSPINA,ANDRÉS C; RODRIGUEZ,BERARDO; CEBALLOS,CLAUDIA P.
In this study we described the macroscopic and microscopic histology of the reproductive system of male and female Podocnemis lewyana neonates (3.5 months old). We found macroscopic differences in the morphology of the gonads between the sexes, with ovaries being twice as long as testes, and testes being twice as wide as ovaries. Microscopically, we identified several immature elements, such as the lack of a muscle layer in the oviduct of females, and simple epithelia instead of pseudostratified epithelia in the oviduct and epididymis described in reptile adults. We also found a black pigment observed macroscopically in the mesovarium, and macroscopically and histologically in the epididymis. This pigment is consistent with the center of melano-macrophages...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Epididymis; Histology; Ovary; Oviduct; Pigment; Testis.
Ano: 2014
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2014000300009

Pathologic evaluation of testis and epididymis of hairy rams in the semi-arid region of Piaui State
Provedor de dados: 45
Autores: Costa,F.L.A.; Silva,S.M.M.S.; Nascimento,E.F.
The gross and histological examinations of testis and epididymis of 53 crossbred hairy rams in the semi-arid region of Piaui State showed 34 (64.1%) animals with pathologic changes: one animal presented (1.9%) testicle hipoplasia; 35 (66%) degenerative changes, being 13 (24.5%) related to testicular degeneration, three (5.7%) to intraepithelial cysts in the epididymal epithelia and 19 (35.8%) to retention cysts in the epididymis; 11 (20.7%) inflammatory alterations, being five (9.4%) related to epididymitis, four (7.5%) to orchitis and two (3.8%) to spermatic granulomas. The animals with hypoplasic testicle, testicular degeneration and inflammatory alterations were classified as sub-fertile.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hairy rams; Testis; Epididymis; Pathology.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352007000500004

Testicular tumors in dogs: frequency and age distribution
Provedor de dados: 45
Autores: Santos,R.L.; Silva,C.M.; Ribeiro,A.F.C.; Serakides,R.
Estudaram-se a ocorrência e a predisposição etária de neoplasias testiculares em cães. Em 497 cães necropsiados, 47 apresentaram tumores testiculares, correspondendo à frequência de 9,45% (47/497). Houve aumento significativo na freqüência de tumores testiculares em animais velhos.
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Dog; Testis; Neoplasia.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352000000100007

Expression of caveolin-1 in rat Leydig cells
Provedor de dados: 47
Autores: Casanova,Marta B.
Caveolin-1, the first member of caveolin family reported, is recognized as the structural component of caveola, a plasma membrane invagination or vesicles that are a subcompartment distinct from clathrin-coated pits. This protein is also known to be involved in cholesterol trafficking. The aim of this study was to determine the expression of caveolin-1 in adult rat Leydig cells. Testis sections incubated with an antibody to caveolin-1 showed, by immunohistochemistry, a moderate number of Leydig cells with different degrees of immunoreaction and a strong reaction in endothelial cells and in the lamina propia of seminiferous tubules. Caveolin-1 was detected in the cell cytoplasm with a granular pattern and on the cell surface of Leydig cells cultured 24 h on...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Testis; Leydig cells; Caveolin-1.
Ano: 2006
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-95452006000300003

Tissue mRNA expression in rat of newly described matrix metalloproteinases
Provedor de dados: 48
Autores: BERNAL,FABIÁN; HARTUNG,HANS-PETER; KIESEIER,BERND C.
Matrix metalloproteinases (MMPs) comprise a large group of endoproteinases that degrade all protein components of the extracellular matrix. Functionally, MMPs contribute to several different physiological as well as pathological conditions. The number of newly described MMPs has increased in recent years, although current knowledge about their expression pattern in various tissues remains incomplete. Here we analyzed the relative mRNA expression of the most recently described MMPs _ MT5-MMP (MMP-24), MT6-MMP (MMP-25), MMP-27 and epilysin (MMP-28) _ in a broad selection of rat tissues using real time-PCR. MMP-24 mRNA was found to be widely expressed with predominance in the central nervous system. MMP-25 mRNA, in contrast, exhibited peak expression levels...
Tipo: Journal article
Palavras-chave: Bone; CNS; Epilysin; Kidney; MT5-MMP; MT6-MMP; Testis.
Ano: 2005
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602005000200016

Musk gland seasonal development and musk secretion are regulated by the testis in muskrat (Ondatra zibethicus)
Provedor de dados: 48
Autores: Zhang,Tianxiang; Peng,Dong; Qi,Lei; Li,Weixuan; Fan,Mengyuan; Shen,Jiachen; Yang,Liangliang; Wang,Yihua; Wang,Wenxia; Hu,Xiaolong; Cai,Ruibo; Zhou,Ran; Wei,Yuting; Zhou,Juntong; Yang,Shuang; Hu,Defu; Liu,Shuqiang.
Abstract  Background  The muskrat is a seasonal breeder. Males secrete musk to attract females during the breeding season. The testosterone binding to the androgen receptor (AR) in musk glands of muskrat may play an important role conducting the musk secretion process.  Methods  The musk gland, testis and blood samples of musk rats are collected in both breeding and non-breeding seasons. Some part of the samples are kept in liquid nitrogen for transcriptome analysis and Western blotting test. Some part of the samples are kept in 70% alcohol for histology experiment, blood samples are kept at &amp;#8722;20 °C for the serum testosterone measurement experiment.  Results  This study demonstrates that the quantity of secreted musk, the volume of the musk...
Tipo: Journal article
Palavras-chave: Muskrat; Musk gland; Testis; AR; Seasonal development.
Ano: 2017
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602017000100201

Differential expression and localization of ADAM10 and ADAM17 during rat spermatogenesis suggest a role in germ cell differentiation
Provedor de dados: 48
Autores: Urriola-Muñoz,Paulina; Lizama,Carlos; Lagos-Cabré,Raúl; Reyes,Juan G; Moreno,Ricardo D.
BACKGROUND: Extracellular metolloproteases have been implied in different process such as cell death, differentiation and migration. Membrane-bound metalloproteases of the ADAM family shed the extracellular domain of many cytokines and receptor controlling auto and para/juxtacrine cell signaling in different tissues. ADAM17 and ADAM10 are two members of this family surface metalloproteases involved in germ cell apoptosis during the first wave of spermatogenesis in the rat, but they have other signaling functions in somatic tissues. RESULTS: In an attempt to further study these two enzymes, we describe the presence and localization in adult male rats. Results showed that both enzymes are detected in germ and Sertoli cells during all the stages of...
Tipo: Journal article
Palavras-chave: Testis; Spermatogenesis; Apoptosis; Paracrine; Metalloproteinase.
Ano: 2014
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602014000100031

Contribution of environmental pollutants to male infertily: A working model of germ cell apoptosis induced by plasticizers
Provedor de dados: 48
Autores: Lagos-Cabré,Raúl; Moreno,Ricardo D.
Bisphenol A [2,2-bis(4-hydroxyphenyl)propane] (BPA), 4-nonylphenol (NP) and di(2-ethylhexyl)phthalate (DEHP), and its metabolite mono-2-ethylhexyl phthalate (MEHP) are chemicals found in plastics, which act as endocrine disruptors (EDs) in animals, including human. EDs act like hormones in the endocrine system, and disrupt the physiologic function of endogenous hormones. Most people are exposed to different endocrine disruptors and concern has been raised about their true effect on reproductive organs. In the testis, they seem to preferentially attack developing testis during puberty rather than adult organs. However, the lack of information about the molecular mechanism, and the apparently controversial effect observed in different models has hampered the...
Tipo: Journal article
Palavras-chave: Testis; Spermatogenesis; Bisphenol A; Nonylphenol; ADAM17.
Ano: 2012
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602012000100001

Human testis-expressed sequence 101 is limitedly distributed in germinal epithelium of testis and disappears in seminoma
Provedor de dados: 48
Autores: Shen,Cong-Cong; Kang,Yu-Huan; Yu,Lin; Cui,Dan-Dan; He,Yi; Yang,Jin-Liang; Gou,Lan-Tu.
BACKGROUND: Testis-expressed sequence 101 (TEX101) was found to be highly expressed in testis and involved in acrosome reaction in previous studies. Recently, the metastasis suppressor function of TEX101 in cancer was disclosed, but the comprehensive investigation of its expression has rarely been reported. In this study, the expression features of TEX101 in normal human organs and seminoma were systematically analyzed. RESULTS: Immunohistochemistry demonstrated intense staining of TEX101 in human testis tissues; however, its expression in 27 other types of normal human organs, including the ovary, was negligible. Higher expression of TEX101 was observed in the spermatocytes and spermatids of the testis, but relatively lower staining was detected in...
Tipo: Journal article
Palavras-chave: Immunohistochemistry; TEX101; Seminoma; Testis; Western blotting.
Ano: 2014
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602014000100075

Propylthiouracil-induced hypothyroidism delays apoptosis during the first wave of spermatogenesis
Provedor de dados: 48
Autores: Silva,Doris; Lizama,Carlos; Tapia,Verónica; Moreno,Ricardo D.
Mammalian germ cell apoptosis plays a key role in controlling the correct number of germ cells supported by Sertoli cells during the first wave of spermatogenesis in mammalian puberty. However, little is known about hormonal factors that could influence the rate of germ cell apoptosis during puberty or adulthood. In this work we evaluate germ cell apoptosis under hypothyroidism induced by goitrogen propylthiouracil (PTU) during the first wave of spermatogenesis. Neonatally administered PTU promoted a delay in the differentiation of Sertoli cells as evaluated by the expression of clusterin using immunohistochemistry and RT-PCR. Clusterin had different expression levels in control and PTU-treated animals, but under both conditions the highest levels were...
Tipo: Journal article
Palavras-chave: Testis; Spermatocyte; Sertoli cell; Caspase; Apoptosis; Thyroid.
Ano: 2011
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602011000200010

Reproductive biology of Oligosarcus argenteus (Gunther, 1864) adult males and description of the gonadal maturation stages
Provedor de dados: 52
Autores: Matt,Sérgio Luis Pinto da; Gomes,Marcos de Lucca Moreira; Andrade,Dálcio Ricardo de.
Oligosarcus argenteus belongs to the Acestrorhynchinae subfamily, being restricted to South America, and found in several Brazilian hydrographic basins, in lotic and lentic environments, where they are able to reproduce. With the purpose of studying the reproductive biology of the males from this species, many morphological parameters were analyzed during a 24 month period, as well as characterizing the different testicular maturation stages. A maturity scale, with three stages (I - Initial Maturing, II - Intermediate Maturing, III - Final Maturing) was proposed for the adult males of Oligosarcus argenteus. The reproductive period was established by the bimonthly frequency of spermatogenesis and by the gonadal maturation stages.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Reproductive cycle; Histology; Testis; Oligosarcus argenteus.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000100016

Effects of catuaba cristal® on the testis of wistar rats
Provedor de dados: 52
Autores: Freitas,Karine Moura de; Costa,Kyvia Lugate; Campos,Pamela Kelly Araújo; Melo,Fabiana Cristina Silveira Alves de; Paula,Tarcízio Antônio Rego de; Matta,Sérgio Luis Pinto da.
The aim of this study was to evaluate the possible beneficial effects of Catuaba Cristal® (CC), an alcoholic drink made from wine and Erythroxylum catuaba Ar. Cam on testis. Wistar rats either received CC solution (n=8) or water (n=9). Results showed significant body weight reduction within the CC group, although, no weight changes were observed for liver, kidney, testis, epididymis, seminal vesicle and prostate. The volumetric proportion and volume of interstitial tissue and lymphatic space were reduced in the treated group. In the CC group, although the nuclear volume of Leydig cells (LC) decreased, the number of LC per testis increased. These results suggested that CC had no beneficial effect on spermatogenesis of Wistar rats.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aphrodisiac drink; Medicinal plants; Morphometry; Spermatogenesis; Testis.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000500007

Antioxidant Status, Lipid Peroxidation and Testis-histoarchitecture Induced by Lead Nitrate and Mercury Chloride in Male Rats
Provedor de dados: 52
Autores: Bas,Hatice; Kalender,Suna.
ABSTRACT This study was done to evaluate the effects of lead nitrate and mercury chloride in testis tissues of Wistar rats. Lead nitrate and mercury chloride are widely used heavy metals in industry. Oral lead and mercury administrations to adult male rats at doses 45 mg/kg bw and 0.02 mg/kg bw, respectively for 4 weeks caused a significant increasing in MDA levels and antioxidant enzyme activities (SOD, CAT, GPx and GST). The MDA levels and acivities of antioxidant enzymes was lower in rats that were administrated by lead nitrate than mercury chloride treated group. Light microscopic analyses revealed that lead nitrate and mercury chloride induced numerous histopathological changes in testis tissues of rats. Histopathological observations of the testis...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antioxidant enzymes; Lead; Mercury; Oxidative stress; Testis.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132016000100341

Solexa Profiling Identifies Differentially Expressed MiRNAs Between Sexually Immature and Mature Equine Testis
Provedor de dados: 52
Autores: He,Liangjun; Wang,Shiwei; Deng,Haifeng; Dong,Hong; Chen,Jingbo.
ABSTRACT MicroRNAs (miRNAs) are a class of short non-coding RNAs identified as potent regulators of gene expression. Previous studies have suggested that miRNAs are involved in mammalian spermatogenesis. Stallion fertility is an important trait for the horse breeding industry, but stallion fertility traits are largely ignored in the industry. In this study, we generated expression profiles of miRNAs in foal (immature) and stallion (mature) testes using Solexa sequencing. We identified 438 known and homologous equine miRNAs and 199 novel miRNAs which were distributed among all the chromosomes. The two developmental stages showed significant differences in miRNA expression patterns. Our result expands the horse miRNA database and provided additional...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Horse; MiRNAs; Solexa; Testis.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132018000100307

Cat, cougar, and jaguar spermatogenesis: a comparative analysis
Provedor de dados: 52
Autores: Costa,Deiler Sampaio; Paula,Tarcízio Antônio Rêgo; Matta,Sérgio Luiz Pinto da.
This work presents a comparative review about the spermatogenic process in cats (Felis domestica), jaguars (Panthera onca) and cougars (Puma concolor), with emphasis on testicular biometry, gonadossomatic index, volumetric proportion of testicular parenchyma components, tubular diameter, seminiferous epithelial height and seminiferous tubule length. It was an approach of the differences among the cell proportions that allowed conclusions about the overall yield of spermatogenic process and Sertoli cell index in three feline species.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Spermatogenesis; Felines; Testis.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000600006

Testis and vas deferens morphology of the red-clawed mangrove tree crab (Goniopsis cruentata) (Latreille, 1803)
Provedor de dados: 52
Autores: Garcia,Tatiane Martins; Silva,José Roberto Feitosa.
The present study describes the structure of the testes and vas deferens of the red-clawed mangrove tree crab, Goniopsis cruentata. Testes and vas deferens were fixed with cold Bouin's solution and submitted to histological routine examinations. Light microscopy showed the testis to be divided into three regions: anterior, containing the germinal zone; intermediary, including the collecting duct; and posterior. The vas deferens, which was continuous with the testes, could be divided into two regions: one corresponding to the expansions and another lined by cubical epithelium, collagenous fibers and a circular layer of muscle cells and containing the androgenic gland. Spermatophores were observed in both vas deferens regions suggesting that they...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brachyura; Goniopsis cruentata; Reproduction; Spermatophore; Testis; Vas deferens.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000300019

Testicular Histomorphometric Evaluation of Zebu Bull Breeds
Provedor de dados: 52
Autores: Andreussi,Paulo Antônio Terrabuio; Costa,Deiler Sampaio; Faria,Fábio José Carvalho; Fernandes,Carlos Antônio Carvalho; Santos,Marcelo Diniz; Silva,Juliana Correa Borges.
The objective of this study was to evaluate the quantitative histology and testicular biometrics in zebu bulls of different breeds. Testicular fragments of Nelore (n=10), Polled Nelore (n=6), Gir (n=5), Guzerat (n=5) and Tabapuã bulls (n=5) were used. The fragments were perfusion-fixed in Karnovsky solution, embedded in glycol methacrylate and stained with toluidine blue-1% sodium borate. The Nelore animals had a higher tubular volumetric proportion (85.2%) and greater height of the seminiferous epithelium (73.2 µm) than the Gir, Guzerat and Tabapuã breeds. The Nelore animals also had a higher volumetric proportion of Leydig cells (5.2%) than the Guzerat and Tabapuã breeds. There was no significant difference for any of these parameters between the Nelore...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cattle; Testis; Volumetric proportion; Seminiferous tubule.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132014000600900

Interbular space characterization in adult capybara (Hydrochoerus hydrochaeris) testis
Provedor de dados: 52
Autores: Paula,Tarcízio Antônio Rego de; Matta,Sérgio Luiz Pinto da; Silva Jr.,Valdemiro Amaro da; Costa,Deiler Sampaio; Fonseca,Cláudio Cesar; Neves,Marco Túlio David das.
This study aimed at the qualitative and quantitative characterization of the different intertubular tissue components in adult male capybara. Testes of 15 adult capybaras from a commercial slaughterhouse of wild animals were used. The average percentage of Leydig cells was 32.95 ± 10.03 %, whereas in the other components of the intertubular space it was 14.95 ± 4.79 %, thus the whole intertubular space totalized 47.91 ± 11.48 %. The average weight of the testes were 32.83 ± 4.78g, while the animals' body weight were around 52.37 kg and the gonadosomatic and leydigosomatic indexes were 0.125 ± 0.02% and 0.0411 ± 0.0148% respectively. It was concluded that the leydigosomatic index of the capybaras was lower than the one observed in rats, as well as the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Intertubular space; Leydig cell; Testis; Capybara; Hydrochoerus hydrochaeris.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132007000200014

Morphological aspects of the spermatic cord of mice (Mus musculus)
Provedor de dados: 62
Autores: Gonçalves,Andréia Maria Martarello; Borelli,Vicente.
A histological study of the morphological aspects of 33 spermatic cord pairs of adult mice (Mus musculus) showed that its their components were ensheated by a thin mesothelium capsule in 3 pairs. Under this capsule, completely surrounding the cord, there was a dense layer of adipose tissue. Its components were surrounded by loose connective tissue with a predominance of collagen fibers among reticular and elastic fibers. The testicular artery varied in diameter and was involved by the testicular veins, consisting of an inner layer formed by endothelium and an inner limiting elastic membrane, a middle layer formed by a thick smooth muscle layer supported by a network of reticular fibers, and an outer layer consisting of dense connective tissue close to the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Spermatic cord; Mice; Irrigation; Vascularization; Testis.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-95962003000700009

Testicular schistosomiasis caused by Schistosoma mansoni: a case report from Brazil
Provedor de dados: 55
Autores: Lopes,Roberto Iglesias; Leite,Kátia Ramos; Prando,Décio; Lopes,Roberto Nicomedes.
Testicular schistosomiasis by Schistosoma mansoni is exceedingly rare, with only 11 cases reported in PubMed. We report a new case from Brazil. A 31-year-old man from the northeast region of the country presented with a 2 cm nodule in the right testis. Ultrasonography showed a well-delimited hypoechoic tumor, suggestive of a granulomatous lesion. Magnetic resonance imaging revealed an irregular tunica albuginea signal. A biopsy showed interstitial tissue with schistosome ova and granuloma formation. The nodule was excised, and the patient was treated with oxamniquine. He has remained symptom free for 10 years. A testicular nodule should raise suspicion of numerous pathologies, including schistosomiasis. Treatment should include therapy with oxamniquine or...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Testis; Schistosomiasis; Orchiectomy.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702007000500015

The effect of microgravity on tissue structure and function of rat testis
Provedor de dados: 56
Autores: Ding,Ye; Tang,Jin; Zou,Jun; She,Ruiping; Wang,Yinghua; Yue,Zhuo; Tian,Jijing; Xia,Kangkang; Yin,Jun; Wang,Desheng.
To explore whether an environment of weightlessness will cause damage to the reproductive system of animals, we used the tail-suspension model to simulate microgravity, and investigated the effect of microgravity on the tissue structure and function of the testis in sexually mature male rats. Forty-eight male Wistar rats weighing 200-250 g were randomly assigned to three groups (N = 16 each): control, tail traction, and tail suspension. After the rats were suspended for 7 or 14 days, morphological changes of testis were evaluated by histological and electron microscopic methods. The expression of HSP70, bax/bcl-2 and AR (androgen receptor) in testis was measured by immunohistochemistry. Obvious pathological lesions were present in the testis after the rats...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Simulated microgravity; Histopathology; AR; HSP70; Bax/bcl-2; Testis.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2011001200007

Molecular analysis of CIB4 gene and protein in Kermani sheep
Provedor de dados: 56
Autores: Mohammadabadi,M.R.; Jafari,A.H.D.; Bordbar,F.
The human calcium- and integrin-binding protein (CIB) family is composed of CIB1, CIB2, CIB3, and CIB4 proteins and the CIB4 gene affects fertility. Kermani sheep is one of the most important breeds of Iranian sheep breeds. The aim of this study was to analyze for the first time molecular characteristics of the CIB4 gene and protein in Kermani sheep. Different tissues were collected from the Kermani sheep and real time PCR was performed. The PCR products were sequenced, comparative analyses of the nucleotide sequences were performed, a phylogenetic tree was constructed, and different characteristics of CIB4 proteins were predicted. Real time PCR results showed that the CIB4 gene is expressed only in testis of Kermani sheep. The cDNA nucleotide sequence was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: CIB4 gene; Kermani sheep; Molecular characteristics; Testis; Interaction.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2017001100602

Luteinizing hormone reduction by the male potency herb, Butea superba Roxb.
Provedor de dados: 56
Autores: Malaivijitnond,S.; Ketsuwan,A.; Watanabe,G.; Taya,K.; Cherdshewasart,W.
To determine if Butea superba Roxb., a traditional Thai male potency herb, has androgenic activity in 60-day-old male Wistar rats, we measured its effects on the pituitary-testicular axis and sex organs. Intact and orchidectomized adult male rats were subdivided into five groups (10 rats/group): distilled water, Butea superba (BS)-10, BS-50, BS-250, and testosterone propionate (TP). They received 0, 10, 50, and 250 mg·kg body weight-1·day-1 BS in distilled water by gavage and 6 mg·kg body weight-1·day-1 TP sc, respectively, during the 30-day treatment period. Blood was collected every 15 days and luteinizing hormone (LH), follicle-stimulating hormone (FSH) and testosterone were measured. Changes of weight and histological appearance of sex organs were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Butea superba; Testosterone propionate; Testis; Seminal vesicle; Luteinizing hormone.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2010000900006