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| Registros recuperados: 54 | |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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... |
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Palavras-chave: Anti-Müllerian hormone (AMH); Cryptorchidism; Equine; Testis. |
| Ano: 2015 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/4151 |
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| 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... |
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Palavras-chave: Developmental change; Seasonal change; Sika deer; Steroidogenic enzyme; Testis. |
| Ano: 2010 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2816 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 −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 |
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| 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 |
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| 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 |
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| Registros recuperados: 54 | |
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