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https://www.readbyqxmd.com/read/28645613/regulation-of-testicular-steroidogenesis-by-foxa3-via-transcriptional-modulation-of-er%C3%AE-signaling-in-type-2-diabetes-mellitus-t2dm
#1
Yong Zhao, Hong-Xin Li, Ke Wang, Bin-Yuan Yan, Wei Li
Although both insulin and estrogen receptor α (ERα) are known to exert inhibitory effects on testicular steroidogenesis, it remains unknown whether these pathways regulate testosterone (T) production under certain pathological conditions [e.g., type 2 diabetes mellitus (T2DM)] in a coordinated manner. Here, we found that the expression of forkhead box protein A3 (Foxa3), an essential transcriptional regulator engaged in adipogenesis and energy metabolism, was significantly down-regulated in the Leydig cells (LCs) from T-deficient T2DM mice...
June 20, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28641554/future-of-spermatogonial-stem-cell-culture-application-of-nanofiber-scaffolds
#2
Azar Shams, Neda Eslahi, Mansoureh Movahedin, Fariborz Izadyar, Hamidreza Asgari, Morteza Koruji
The spermatogonial stem cells (SSCs) are unique in mammals because they can transmit genetic information from generation to generation and it is of significant importance. In testes, Sertoli cells, peritubular myoid cells, Leydig cells and other interstitial cells contribute to the spermatogonial stem cell "niche". So, creation of niche in in vitro condition that mimics in vivo environment is essential to maintain functional characteristic of SSCs. Nanofiber matrices mimic the architecture and size scale of the natural extracellular matrix (ECM)...
June 22, 2017: Current Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/28637324/the-effects-of-phytosterols-on-the-sexual-behavior-and-reproductive-function-in-the-japanese-quail-coturnix-coturnix-japonica
#3
Mohammad Ibrahim Qasimi, Kentaro Nagaoka, Gen Watanabe
Phytosterols (PS) are plant origin sterols naturally found in many foods and added as food additives. Since 1950, PS have attracted considerable attention due to their ability to lower serum cholesterol and inhibit cardiovascular disease (CVD). However, recent studies have found that PS act as endocrine-disrupting chemicals in laboratory animals. Therefore, this study was aimed at finding the mechanism(s) for PS effects on the sexual behaviors and reproductive functions in male Japanese quails (Coturnix coturnix japonica)...
June 16, 2017: Poultry Science
https://www.readbyqxmd.com/read/28627666/expression-pattern-of-zinc-finger-protein-185-in-mouse-testis-and-its-role-in-regulation-of-testosterone-secretion
#4
Xinguo You, Lu Wei, Shutong Fan, Weiwei Yang, Xiaoying Liu, Guohui Wang, Yi Man, Zhifang Pan, Weiguo Feng
Zinc finger protein 185 (ZNF185) belongs to the ZNF family and is involved in cell proliferation and differentiation. To the best of our knowledge, the association between ZNF185 and male reproduction is unknown. In the present study, the expression and localization of ZNF185 in mouse testis, as well as its role in testosterone secretion, cell cycle progression and apoptosis of mouse Leydig cells were investigated. The results of the immunofluorescence analysis indicated that ZNF185 was highly expressed in Leydig cells of the mouse testis, and primarily localized in the cytoplasm...
June 16, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28613007/transcriptional-coactivator-with-pdz-binding-motif-is-required-to-sustain-testicular-function-on-aging
#5
Mi Gyeong Jeong, Hyuna Song, Ji Hyun Shin, Hana Jeong, Hyo Kyeong Kim, Eun Sook Hwang
Transcriptional coactivator with PDZ-binding motif (TAZ) directly interacts with transcription factors and regulates their transcriptional activity. Extensive functional studies have shown that TAZ plays critical regulatory roles in stem cell proliferation, differentiation, and survival and also modulates the development of organs such as the lung, kidney, heart, and bone. Despite the importance of TAZ in stem cell maintenance, TAZ function has not yet been evaluated in spermatogenic stem cells of the male reproductive system...
June 14, 2017: Aging Cell
https://www.readbyqxmd.com/read/28611113/active-paraoxonase-1-is-synthesised-throughout-the-internal-boar-genital-organs
#6
Isabel Barranco, Cristina Perez-Patiño, Asta Tvarijonaviciute, Inmaculada Parrilla, Alejandro Vicente-Carrillo, Manuel Alvarez-Rodriguez, Jose J Ceron, Emilio Martinez, Heriberto Rodriguez-Martinez, Jordi Roca
The paraoxonase type 1 (PON1) is an enzyme with antioxidant properties recently identified in the seminal plasma (SP) of several species, including the porcine. The aims of the present study were to (1) describe the inmunohistochemical localization of PON1 in the genital organs of fertile boars and (2) evaluate the relationship among PON1 activity and high-density lipoprotein cholesterol (HDL-C) concentration in fluids of the boar genital organs. Immunohistochemical analysis demonstrated that PON1 was present in testis (specifically in Leydig cells, blood vessels, spermatogonia and elongated spermatids), epididymis (specifically in the cytoplasm of the principal epithelial cells, luminal secretion and in the surrounding smooth muscle) and the lining epithelia of the accessory sexual glands (cytoplasmic location in the prostate and membranous in the seminal vesicle and bulbourethral glands)...
June 13, 2017: Reproduction: the Official Journal of the Society for the Study of Fertility
https://www.readbyqxmd.com/read/28611112/microrna-150-regulates-steroidogenesis-of-mouse-testicular-leydig-cells-by-targeting-star
#7
Xu-Jing Geng, Dong-Mei Zhao, Gen-Hong Mao, Li Tan
Leydig cells are essential for male reproductive development throughout life. Production of androgens as well as intermediate steroids is tightly regulated. Although microRNAs (miRNAs) are suggested to play important roles in spermatogenesis, little is currently known regarding the regulation of steroidogenesis by miRNAs in Leydig cells. Here, we found that miR-150 was predominantly expressed in Leydig cells within mouse testis. Therefore, we determined steroidogenesis of the Leydig cells in which miR-150 was knocked down or overexpressed using miR-150 antagomir and agomir, respectively...
June 13, 2017: Reproduction: the Official Journal of the Society for the Study of Fertility
https://www.readbyqxmd.com/read/28609275/effect-of-d-ribose-l-cysteine-on-aluminum-induced-testicular-damage-in-male-sprague-dawley-rats
#8
Benedict Falana, Opeyemi Adeleke, Mulikat Orenolu, Abraham Osinubi, Adeoye Oyewopo
OBJECTIVE: This study investigated the effects of D-ribose and L-cysteine on aluminum-induced testicular damage in male Sprague-Dawley rats. METHOD: A total number of thirty-five (35) adult male Sprague-Dawley rats were divided into four groups (AD). Group A (comprised five (5) rats) was designated the Control Group that received Physiological Saline; while groups B, C, and D (comprised ten (10) rats) were given 75 mg/kg, 150 mg/kg and 300 mg/kg of body weight of aluminum chloride respectively for 39 days...
June 1, 2017: JBRA Assisted Reproduction
https://www.readbyqxmd.com/read/28607553/study-of-testicular-structure-in-fetuses-with-prune-belly-syndrome
#9
Luciano A Favorito, Suelen F Costa, Waldemar S Costa, Rodrigo Vieiralves, Fabio O Bernardo, Francisco J B Sampaio
PURPOSE: To compare the structure of the testis in fetuses with prune belly syndrome (PBS) to normal controls. MATERIALS AND METHODS: We studied 6 testes obtained from 3 fetuses with PBS and 14 testes from 7 male fetuses. The testicular specimens were cut into 5-μm thick sections and stained with hematoxylin and eosin (HE), to observe the seminiferous tubules; Weigert's solution to observe elastic fibers; and picrosirius red to observe collagen. The images were captured with an Olympus BX51 microscope and Olympus DP70 camera...
2017: Advances in Urology
https://www.readbyqxmd.com/read/28588502/transient-hypothyroidism-dual-effect-on-adult-type-leydig-cell-and-sertoli-cell-development
#10
Eddy Rijntjes, Marcos L M Gomes, Nina Zupanič, Hans J M Swarts, Jaap Keijer, Katja J Teerds
Transient neonatal 6-propyl-2-thiouracil (PTU) induced hypothyroidism affects Leydig and Sertoli cell numbers in the developing testis, resulting in increased adult testis size. The hypothyroid condition was thought to be responsible, an assumption questioned by studies showing that uninterrupted fetal/postnatal hypothyroidism did not affect adult testis size. Here, we investigated effects of transient hypothyroidism on Leydig and Sertoli cell development, employing a perinatal iodide-deficient diet in combination with sodium perchlorate...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28582340/a-report-of-ovarian-sertoli-leydig-cell-tumors-with-heterologous-intestinal-type-glands-and-alpha-fetoprotein-elevation-and-review-of-the-literature
#11
Maysa Al-Hussaini, Yazan Al-Othman, Eman Hijazi, W Glenn McCluggage
Ovarian Sertoli-Leydig cell tumors (SLCTs) are uncommon neoplasms that are occasionally associated with an elevated level of serum alpha fetoprotein (AFP), a marker of germ cell neoplasms, particularly yolk sac tumor (YST). We report 7 cases of ovarian SLCT (3 moderately differentiated, 2 poorly differentiated, 2 retiform) with heterologous intestinal-type glands, 6 of which were associated with elevated serum AFP. The intestinal-type mucinous glands were immunoreactive for SALL4 (4 cases), AFP (4 cases), glypican 3 (1 case), CDX2 (6 cases), and villin (7 cases), markers that are commonly expressed in YSTs, although the latter 2 markers would be expected to be positive in intestinal-type glands...
June 2, 2017: International Journal of Gynecological Pathology
https://www.readbyqxmd.com/read/28579575/prenatal-and-early-postnatal-noael-dose-clothianidin-exposure-leads-to-a-reduction-of-germ-cells-in-juvenile-male-mice
#12
Shogo Yanai, Tetsushi Hirano, Takuya Omotehara, Tadashi Takada, Naoki Yoneda, Naoto Kubota, Anzu Yamamoto, Youhei Mantani, Toshifumi Yokoyama, Hiroshi Kitagawa, Nobuhiko Hoshi
Neonicotinoids are pesticides used worldwide. They bind to insect nicotinic acetylcholine receptors (nAChRs) with high affinity. We previously reported that clothianidin (CTD), one of the latest neonicotinoids, reduced antioxidant expression and induced germ cell death in the adult testis of vertebrates. Here, we investigated the male reproductive toxicity of prenatal and early postnatal exposure to CTD, because it is likely that developmental exposure more severely affects the testis compared to adults due to the absence of the blood-testis barrier...
June 3, 2017: Journal of Veterinary Medical Science
https://www.readbyqxmd.com/read/28576872/origin-of-a-rapidly-evolving-homeostatic-control-system-programming-testis-function
#13
Pengli Bu, Shintaro Yagi, Kunio Shiota, Sheik Alam, Jay Vivian, Michael W Wolfe, Mohammad Rumi, Damayanti Chakraborty, Kaiyu Kubota, Pramod Dhakal, Michael Soares
Mammals share common strategies for regulating reproduction, including a conserved hypothalamic-pituitary-gonadal axis yet individual species exhibit differences in reproductive performance. In this report, we describe the discovery of a species-restricted homeostatic control system programming testis growth and function. Prl3c1 is a member of the prolactin gene family and its protein product (PLP-J) was discovered as a uterine cytokine contributing to the establishment of pregnancy. We utilized mouse mutagenesis of Prl3c1 and revealed its involvement in the regulation of the male reproductive axis...
June 2, 2017: Journal of Endocrinology
https://www.readbyqxmd.com/read/28575284/role-of-heat-shock-factor-1-in-conserving-cholesterol-transportation-in-leydig-cell-steroidogenesis-via-steroidogenic-acute-regulatory-protein
#14
Shintaro Oka, Koji Shiraishi, Mitsuaki Fujimoto, Arpit Katiyar, Ryosuke Takii, Akira Nakai, Hideyasu Matsuyama
Testicular testosterone synthesis begins with cholesterol transport into mitochondria via steroidogenic acute regulatory protein (StAR) in Leydig cells. Acute heat stress is known to obstruct testicular steroidogenesis by transcriptional repression of StAR. In contrast, chronic heat stress such as cryptorchidism or varicocele generally does not affect testicular steroidogenesis, suggesting that Leydig cells adapt to heat stress and retain their steroid synthesis ability. However, the mechanisms of the stress response in steroid-producing cells are unclear...
May 29, 2017: Endocrinology
https://www.readbyqxmd.com/read/28571864/inhibition-effects-of-perfluoroalkyl-acids-on-progesterone-production-in-mltc-1
#15
Wei Zhao, Ruina Cui, Jianshe Wang, Jiayin Dai
Perfluoroalkyl substances (PFASs) are a class of fluorine substituted carboxylic acid, sulfonic acid and alcohol, structurally similar to their corresponding parent compounds. Previous study demonstrated the potential endocrine disruption and reproductive toxicity of perfluorooctane sulfonic acid and perfluorooctanoic acid, two dominant PFASs in animals and humans. We explored the relationship between eleven perfluoroalkyl acids (PFAAs) with different carbon chain length and their ability to inhibit progesterone production in mouse Leydig tumor cells (mLTC-1)...
June 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/28570908/new-insight-on-the-role-of-melatonin-receptors-in-reproductive-processes-of-seasonal-breeders-on-the-example-of-mature-male-european-bison-bison-bonasus-linnaeus-1758
#16
Anna Tabecka-Lonczynska, Jennifer Mytych, Przemyslaw Solek, Magdalena Kulpa, Marek Koziorowski
Melatonin receptors (MT1 and MT2) were shown to regulate proper functioning of reproductive system, especially in seasonally breeding animals. European bison is a unique endangered seasonal breeder and knowledge of the molecular mechanisms of its reproduction is crucial for the survival of the species. The aim of this study was to assess gene expression, protein synthesis and immunohistochemical localization of MT1 and MT2 receptors in testicular and spermatic cord vessels tissues collected in pre-rut (June) and post-rut (December) seasons from adult male European bisons in Bialowieza National Park...
May 24, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28569117/testicular-ultrasensitive-doppler-preliminary-experience-a-feasibility-study
#17
Laurence Rocher, Jean-Luc Gennisson, Sophie Ferlicot, Aline Criton, Laurence Albiges, Vincent Izard, Marie France Bellin, Jean-Michel Correas
Background Ultrasensitive Doppler is a novel non-invasive ultrasound (US) Doppler technique that improves sensitivity and resolution for the detection of slow flow. Purpose To investigate the feasibility of ultrasensitive Doppler (USD) for testicular disease diagnosis, using both qualitative and quantitative results. Material and Methods This prospective study was conducted in 160 successive men referred for scrotal US including B-mode and conventional Color-Doppler. A new USD sequence and algorithm dedicated to academic research were implemented into the US system...
January 1, 2017: Acta Radiologica
https://www.readbyqxmd.com/read/28566680/dibutyl-phthalate-induced-testicular-dysgenesis-originates-after-seminiferous-cord-formation-in-rats
#18
Nathália L M Lara, Sander van den Driesche, Sheila Macpherson, Luiz R França, Richard M Sharpe
Administration of dibutyl phthalate (DBP) to pregnant rats causes reproductive disorders in male offspring, resulting from suppression of intratesticular testosterone, and is used as a model for human testicular dysgenesis syndrome (TDS). DBP exposure in pregnancy induces focal dysgenetic areas in fetal testes that appear between e19.5-e21.5, manifesting as focal aggregation of Leydig cells and ectopic Sertoli cells (SC). Our aim was to identify the origins of the ectopic SC. Time-mated female rats were administered 750 mg/kg/day DBP in three different time windows: full window (FW; e13...
May 31, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28565824/roscovitine-protects-murine-leydig-cells-from-lipopolysaccharide-induced-inflammation
#19
Tiancheng Xie, Guanghui Hu, Binbin Dong, Yangye Yan, Min Liu, Xudong Yao, Junhua Zheng, Yunfei Xu
Roscovitine is a cyclin-dependent kinase inhibitor, which has been previously investigated for its anticancer effects. It has also been confirmed that roscovitine can downregulate the expression of myeloid cell leukemia-1 protein to inhibit inflammation. In the present study, roscovitine was used to treat inflammation in lipopolysaccharide (LPS)-induced model mice. At the cellular level, Leydig cells isolated from mouse testis were assessed for inflammatory factors. It was revealed that roscovitine successfully reduced inflammation-associated injury induced by LPS pretreatment...
May 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28561756/local-actions-of-melatonin-in-somatic-cells-of-the-testis
#20
REVIEW
Mónica Beatriz Frungieri, Ricardo Saúl Calandra, Soledad Paola Rossi
The pineal hormone melatonin regulates testicular function through the hypothalamic-adenohypophyseal axis. In addition, direct actions of melatonin in somatic cells of the testis have been described. Melatonin acts as a local modulator of the endocrine activity in Leydig cells. In Sertoli cells, melatonin influences cellular growth, proliferation, energy metabolism and the oxidation state, and consequently may regulate spermatogenesis. These data pinpoint melatonin as a key player in the regulation of testicular physiology (i...
May 31, 2017: International Journal of Molecular Sciences
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