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https://www.readbyqxmd.com/read/28916336/renal-tubular-and-adrenal-medullary-tumors-in-the-2-year-rat-study-with-canagliflozin-confirmed-to-be-secondary-to-carbohydrate-glucose-malabsorption-in-the-15-month-mechanistic-rat-study
#1
Sandra De Jonghe, Mark D Johnson, Rao N V S Mamidi, Petra Vinken, Bianca Feyen, Godelieve Lammens, Jim Proctor
During preclinical development of canagliflozin, an SGLT2 inhibitor, treatment-related pheochromocytomas, renal tubular tumors (RTT), and testicular Leydig cell tumors were reported in the 2-year rat toxicology study. In a previous 6-month rat mechanistic study, feeding a glucose free diet prevented canagliflozin effects on carbohydrate malabsorption as well as the increase in cell proliferation in adrenal medulla and kidneys, implicating carbohydrate malabsorption as the mechanism for tumor formation. In this chronic study male Sprague-Dawley rats were dosed orally with canagliflozin at high dose-levels (65 or 100 mg/kg/day) for 15 months and received either a standard diet or a glucose-free diet...
September 12, 2017: Chemico-biological Interactions
https://www.readbyqxmd.com/read/28914501/andrology-of-male-to-female-transsexuals-influence-of-cross-sex-hormone-therapy-on-testicular-function
#2
REVIEW
F Schneider, S Kliesch, S Schlatt, N Neuhaus
Patients with gender dysphoria are offered cross-sex hormone therapy and sex reassignment surgery to achieve the transition between the sex assigned at birth and gender identity. According to international guidelines, cross-sex hormone therapy in trans-women should lead to a psychologically and physiologically healthy body with feminized serum hormone levels, resulting in suppression of spermatogenesis. However, in a recently published multi-center study, we discovered a high proportion of patients with male serum hormone levels and qualitatively intact spermatogenesis on the day of sex reassignment surgery...
September 2017: Andrology
https://www.readbyqxmd.com/read/28912046/seasonal-expression-of-luteinizing-hormone-receptor-and-follicle-stimulating-hormone-receptor-in-testes-of-the-wild-ground-squirrels-citellus-dauricus-brandt
#3
Junjie Wang, Ying Wang, Manyu Zhu, Fengwei Zhang, Xia Sheng, Haolin Zhang, Yingying Han, Zhengrong Yuan, Qiang Weng
The objective of this study was to evaluate whether luteinizing hormone (LH), follicle stimulating hormone (FSH) and their receptors luteinizing hormone receptor (LHR) and follicle stimulating hormone receptor (FSHR) play roles in the seasonal spermatogenesis of the wild ground squirrels. To that end, we characterized the testicular immunolocalization of LHR and FSHR, their expression on both mRNA and protein levels, as well as serum concentrations of LH and FSH in male wild ground squirrels throughout the annual reproductive cycle...
September 11, 2017: Acta Histochemica
https://www.readbyqxmd.com/read/28911537/functional-study-of-cordyceps-sinensis-and-cordycepin-in-male-reproduction-a-review
#4
REVIEW
Yung-Chia Chen, Ying-Hui Chen, Bo-Syong Pan, Ming-Min Chang, Bu-Miin Huang
Cordyceps sinensis has various biological and pharmacological functions, and it has been claimed as a tonic supplement for sexual and reproductive dysfunctions for a long time in oriental society. In this article, the in vitro and in vivo effects of C. sinensis and cordycepin on mouse Leydig cell steroidogenesis are briefly described, the stimulatory mechanisms are summarized, and the recent findings related to the alternative substances regulating male reproductive functions are also discussed.
January 2017: Journal of Food and Drug Analysis
https://www.readbyqxmd.com/read/28911170/sertoli-cell-number-defines-and-predicts-germ-and-leydig-cell-population-sizes-in-the-adult-mouse-testis
#5
Diane Rebourcet, Annalucia Darbey, Ana Monteiro, Ugo Soffientini, Yi Ting Tsai, Ian Handel, Jean-Luc Pitetti, Serge Nef, Lee B Smith, Peter J O'Shaughnessy
Sertoli cells regulate differentiation and development of the testis and are essential for maintaining adult testis function. To model the effects of dysregulating Sertoli cell number during development or aging, we have used acute diphtheria toxin-mediated cell ablation to reduce Sertoli cell population size. Results show that the size of the Sertoli cell population that forms during development determines the number of germ cells and Leydig cells that will be present in the adult testis. Similarly, the number of germ cells and Leydig cells that can be maintained in the adult depends directly on the size of the adult Sertoli cell population...
September 1, 2017: Endocrinology
https://www.readbyqxmd.com/read/28903822/evaluation-of-a-zinc-gluconate-neutralized-with-arginine-product-as-a-nonsurgical-method-for-sterilization-of-rhesus-macaques-macaca-mulatta
#6
Kacie N Woodward, Rebekah I Keesler, J Rachel Reader, Kari L Christe
Because rhesus macaques (Macaca mulatta) are prolific breeders, overpopulation can be problematic in both research and feral populations. Currently, the most effective contraceptive methods are hormonal control in female macaques and vasectomies in males. These methods each come with innate challenges, the foremost being the alteration of necessary hormonal patterns. In this study, we assessed the use of zinc gluconate neutralized with arginine as a novel, nonsurgical alternative to male contraception in 12 rhesus macaques...
September 1, 2017: Journal of the American Association for Laboratory Animal Science: JAALAS
https://www.readbyqxmd.com/read/28903063/cooperative-regulation-of-gja1-expression-by-members-of-the-ap-1-family-cjun-and-cfos-in-tm3-leydig-and-tm4-sertoli-cells
#7
Firas Ghouili, Luc J Martin
Within the testis, connexin43 encoded by Gja1 plays an important role in cell-to-cell communication between Leydig cells as well as between Sertoli cells and spermatogonia. In the adult male, Leydig cells are the principal producers of testosterone sustaining spermatogenesis, while Sertoli cells nourish, protect and support the differentiating germ cells. It has been shown previously that members of the AP-1 family regulate Gja1 expression in myometrial cells, suggesting that such regulatory mechanism may also be relevant within the testis...
September 10, 2017: Gene
https://www.readbyqxmd.com/read/28894178/effect-of-prenatal-dinch-plasticizer-exposure-on-rat-offspring-testicular-function-and-metabolism
#8
Enrico Campioli, Sunghoon Lee, Matthew Lau, Lucas Marques, Vassilios Papadopoulos
In 2002, the plasticizer 1,2-cyclohexane dicarboxylic acid diisononyl ester (DINCH) was introduced in the European market as a substitute for endocrine-disrupting phthalates. We found that in utero exposure of rats to DINCH from gestational day 14 until parturition affected reproductive organ physiology and reduced circulating testosterone levels at post-natal day 60, indicating a long-term effect on Leydig cells of the testis. Metabolically, animals exhibited randomly increased serum glucose concentrations not associated with impaired glucose utilization...
September 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28893856/distinct-and-cooperative-roles-of-amh-and%C3%A2-dmrt1-in-self-renewal-and-differentiation-of-male-germ-cells-in-zebrafish
#9
Qiaohong Lin, Jie Mei, Zhi Li, Xuemei Zhang, Li Zhou, Jian-Fang Gui
Spermatogenesis is a fundamental process in male reproductive biology, and depends on precise balance between self-renewal and differentiation of male germ cells. However, the regulative factors for controlling the balance are poorly understood. In this study, we examined the roles of amh and dmrt1 in male germ cell development by generating their mutants with Crispr/Cas9 technology in zebrafish. Amh mutant zebrafish displayed a female-biased sex ratio, and both male and female amh mutants developed hypertrophic gonads due to uncontrolled proliferation and impaired differentiation of germ cells...
September 11, 2017: Genetics
https://www.readbyqxmd.com/read/28889079/lead-induces-apoptosis-in-mouse-tm3-leydig-cells-through-the-fas-fasl-death-receptor-pathway
#10
Xiuyuan He, Jing Wu, Liyun Yuan, Feng Lin, Jine Yi, Jing Li, Hui Yuan, Jinling Shi, Tingting Yuan, Shufang Zhang, Yongheng Fan, Zhihang Zhao
The study was aimed to investigate the effect of Pb toxicity on mouse Leydig cells and its molecular mechanism. The TM3 cells were cultured in vitro and exposed to Pb at different concentrations for 24h. The effects of Pb on cell proliferation and apoptosis were analyzed with MTT and Annexin V-FITC/PI via flow cytometry, respectively. Expression levels of Fas, Fas-L and caspase-8 in TM3 cells were determined by western blot. As well as the inhibitory effect of the caspase-8 inhibitor Z-IETD-FMK on cell apoptosis...
September 1, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28887675/how-bad-is-aluminum-exposure-to-reproductive-parameters-in-rats
#11
Viviane G S Mouro, Tatiana P Menezes, Graziela D A Lima, Rafael R Domingues, Ana Cláudia F Souza, Juraci A Oliveira, Sérgio L P Matta, Mariana Machado-Neves
Aluminum (Al) is the most widely distributed metal in the environment and is extensively used in human daily life without any known biological function. It is known that exposure to high concentrations of Al impacts negatively on serum testosterone levels, testicular histomorphometry, and sperm parameters; however, no information is available about the effects of low exposure levels on reproduction. International organizations have established the Al concentration tolerated in drinking water as 3.35 × 10(-4) mg/kg...
September 8, 2017: Biological Trace Element Research
https://www.readbyqxmd.com/read/28871060/hydroxysteroid-dehydrogenase-hsd1l-is-localised-to-the-pituitary-gonadal-axis-of-primates
#12
A Daniel Bird, Spencer Greatorex, David Reser, Gareth G Lavery, Timothy J Cole
Steroid hormones play clinically important and specific regulatory roles in the development, growth, metabolism, reproduction and brain function in human. The type 1 and 2 11-beta hydroxysteroid dehydrogenase enzymes (11β-HSD1 and 2) have key roles in the pre-receptor modification of glucocorticoids allowing aldosterone regulation of blood pressure, control of systemic fluid and electrolyte homeostasis and modulation of integrated metabolism and brain function. Although the activity and function of 11β-HSDs is thought to be understood, there exists an open reading frame for a distinct 11βHSD-like gene; HSD11B1L, which is present in human, non-human primate, sheep, pig and many other higher organisms, whereas an orthologue is absent in the genomes of mouse, rat and rabbit...
October 2017: Endocrine Connections
https://www.readbyqxmd.com/read/28863065/ovarian-leydig-cells-olc-about-their-heterotopia-or-eutopia
#13
Jose-Luis Carrasco-Juan, Hugo Álvarez-Argüelles Cabrera, Maria Del Carmen Martín Corriente, Francisco Valladares Parrilla, Ricardo Gutiérrez García, Lucio Díaz-Flores Feo
No abstract text is available yet for this article.
August 31, 2017: International Journal of Gynecological Pathology
https://www.readbyqxmd.com/read/28859251/comparative-sperm-protein-profiling-in-bulls-differing-in-fertility-and-identification-of-phosphatidylethanolamine-binding-protein-4-a-potential-fertility-marker
#14
L Somashekar, S Selvaraju, S Parthipan, S K Patil, B K Binsila, M M Venkataswamy, S Karthik Bhat, J P Ravindra
This study aimed to identify sperm proteomic signatures regulating sperm functions and fertility by: (i) comparing the sperm electrophoretic protein profiles and identifying the differentially abundant proteins among breeding bulls differing in fertility status and (ii) elucidating the possible role of one of the identified novel proteins, PEBP4 on sperm function and fertility. The grouping of bulls as fertile (n = 6) and low fertile (n = 6) was performed based on bull fertility index and infertile (n = 6) based on semen rejection rate (>33%)...
August 31, 2017: Andrology
https://www.readbyqxmd.com/read/28856410/dynamic-contrast-enhanced-and-diffusion-weighted-mr-imaging-in-the-characterisation-of-small-non-palpable-solid-testicular-tumours
#15
Lucia Manganaro, Matteo Saldari, Carlotta Pozza, Valeria Vinci, Daniele Gianfrilli, Ermanno Greco, Giorgio Franco, Maria Eleonora Sergi, Michele Scialpi, Carlo Catalano, Andrea M Isidori
OBJECTIVES: To explore the role of dynamic contrast-enhanced (DCE) magnetic resonance imaging (MRI), using semiquantitative and quantitative parameters, and diffusion-weighted (DW) MRI in differentiating benign from malignant small, non-palpable solid testicular tumours. METHODS: We calculated the following DCE-MRI parameters of 47 small, non-palpable solid testicular tumours: peak enhancement (PE), time to peak (TTP), percentage of peak enhancement (Epeak), wash-in-rate (WIR), signal enhancement ratio (SER), volume transfer constant (Ktrans), rate constant (Kep), extravascular extracellular space volume fraction (Ve) and initial area under the curve (iAUC)...
August 30, 2017: European Radiology
https://www.readbyqxmd.com/read/28832725/the-quantification-of-testicular-cells-during-the-postnatal-development-in-two-caviomorph-rodents-the-guinea-pig-cavia-porcellus-and-the-cutia-dasyprocta-agouti
#16
Luciana S Simões, Tais H C Sasahara, Phelipe O Favaron, Ricardo Marques, Moacir F DE Oliveira, Márcia R F Machado, Maria Angelica Miglino
The germinative, Sertoli and Leydig cells of two caviomorph rodents (Cavia porcellus and Dasyprocta agouti) were counted as well as the estimation of the total volume of the testis and the total volume of seminiferous tubules and interstitium in prepubertal, pubertal and adult animals. The number of spermatogonia, spermatocytes and spermatids cells increased during the pubertal phase in both rodents, notably the spermatid cells. The spermatocyte and spermatid slightly decreased in the adult of both rodents, but the increment in spermatogonia cells number was seen, mainly in cutias...
August 17, 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/28830057/histopathological-and-ultrastructural-changes-experimentally-induced-by-bee-venom-in-seminiferous-epithelium-via-structural-functional-alteration-of-sertoli-cells
#17
Adrian Florea, Constantin Puică, Sami Hamed, Mariana Tilinca, Horea Matei
We tested here the ability of bee venom (BV) to interfere with spermatogenesis in rats in two experimental conditions. The histopathological changes were assessed with brightfield microscopy using a novel staining technique, based on methylene blue, orange G and ponceau xylidine. Transmission electron microscopy was also used to identify fine subcellular changes. BV injection for 30days in daily doses of 700μg BV/kg resulted in reducing testicular weight, along with significant larger diameters of seminiferous tubules and reduced number of Sertoli cells (SCs)...
August 16, 2017: Micron: the International Research and Review Journal for Microscopy
https://www.readbyqxmd.com/read/28820402/does-signaling-of-estrogen-related-receptors-affect-structure-and-function-of-bank-vole-leydig-cells
#18
P Pawlicki, A Milon, M Zarzycka, J Galas, W Tworzydlo, A Kaminska, L Pardyak, K Lesniak, A Pacwa, B Bilinska, E Gorowska-Wojtowicz, M Kotula-Balak
To get a deeper insight into the function of estrogen-related receptors (ERRs) and dissect underlying mechanism in Leydig cells, ERRs (type α, β and γ) were blocked or activated in testes of adult bank voles (Myodes glareolus) which show seasonal changes in the intratesticular sex hormones level. Both actively reproducing animals (long day conditions; LD) and those with regression of the reproductive system (short day conditions; SD) received intraperitoneal injections of selective ERRα antagonist 3-[4-(2,4-Bis-trifluoromethylbenzyloxy)-3-methoxyphenyl]-2-cyano-N-(5-trifluoromethyl-1,3,4-thiadiazol-2-yl)acrylamide (XCT 790) or selective ERRβ/ERRγ agonist N-(4-(Diethylaminobenzylidenyl)-N'-(4-hydroxybenzoyl)-hydrazine (DY131) (50 μ/kg bw; six doses every other day)...
June 2017: Journal of Physiology and Pharmacology: An Official Journal of the Polish Physiological Society
https://www.readbyqxmd.com/read/28816296/-complete-androgen-insensitivity-syndrome-associated-with-vesical-fistula-a-case-report-and-literature-review
#19
K H Hua, L Yang, X W Zhang, W J Bai, Q Li, T Xu
Androgen insensitivity syndrome (AIS) is a very uncommon genetic disorder that results from the resistance of androgen receptor (AR) to androgen, which influences the formation of the male genitalia and in turn presents with female phenotype. Surgical resection of undesceaded testicle and different kinds of genitoplasty are crucial methods to correct the deformity of reproductive system, as well as hormone replacement therapy, which is an essential therapy for postoperational rehabilitation in AIS patients...
August 18, 2017: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/28812227/effects-of-fluoride-on-surface-structure-of-primary-culture-leydig-cells-in-mouse
#20
Jian Li, Yan Shi, Hua Fan, Yanyan Li, Yuchen Zhu, Xijun Lin, Jianhai Zhang
Fluoride (F) is known to induce reproduction toxicity, and the elucidation of its underlying mechanisms is an ongoing research. These findings aim to provide deeper insights into roles of soduim fluoride (NaF) in testis damage, which could contribute to a better understanding of fluoride-induced male reproductive toxicity. The Leydig cells were administrated by 0, 5, 10, and 20 mg/L NaF for 24 h, respectively. Scanning electron microscope was used to identify the change of surface structure in the Leydig cells...
August 15, 2017: Biological Trace Element Research
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