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https://www.readbyqxmd.com/read/28928959/cell-polarity-cell-adhesion-and-spermatogenesis-role-of-cytoskeletons
#1
REVIEW
Linxi Li, Ying Gao, Haiqi Chen, Tito Jesus, Elizabeth Tang, Nan Li, Qingquan Lian, Ren-Shan Ge, C Yan Cheng
In the rat testis, studies have shown that cell polarity, in particular spermatid polarity, to support spermatogenesis is conferred by the coordinated efforts of the Par-, Crumbs-, and Scribble-based polarity complexes in the seminiferous epithelium. Furthermore, planar cell polarity (PCP) is conferred by PCP proteins such as Van Gogh-like 2 (Vangl2) in the testis. On the other hand, cell junctions at the Sertoli cell-spermatid (steps 8-19) interface are exclusively supported by adhesion protein complexes (for example, α6β1-integrin-laminin-α3,β3,γ3 and nectin-3-afadin) at the actin-rich apical ectoplasmic specialization (ES) since the apical ES is the only anchoring device in step 8-19 spermatids...
2017: F1000Research
https://www.readbyqxmd.com/read/28928467/cross-talk-between-mir-471-5p-and-autophagy-component-proteins-regulates-lc3-associated-phagocytosis-lap-of-apoptotic-germ-cells
#2
Subbarayalu Panneerdoss, Suryavathi Viswanadhapalli, Nourhan Abdelfattah, Benjamin C Onyeagucha, Santosh Timilsina, Tabrez A Mohammad, Yidong Chen, Michael Drake, Kristiina Vuori, T Rajendra Kumar, Manjeet K Rao
Phagocytic clearance of apoptotic germ cells by Sertoli cells is vital for germ cell development and differentiation. Here, using a tissue-specific miRNA transgenic mouse model, we show that interaction between miR-471-5p and autophagy member proteins regulates clearance of apoptotic germ cells via LC3-associated phagocytosis (LAP). Transgenic mice expressing miR-471-5p in Sertoli cells show increased germ cell apoptosis and compromised male fertility. Those effects are due to defective engulfment and impaired LAP-mediated clearance of apoptotic germ cells as miR-471-5p transgenic mice show lower levels of Dock180, LC3, Atg12, Becn1, Rab5 and Rubicon in Sertoli cells...
September 19, 2017: Nature Communications
https://www.readbyqxmd.com/read/28923514/cell-polarity-and-planar-cell-polarity-pcp-in-spermatogenesis
#3
REVIEW
Haiqi Chen, Dolores D Mruk, Wing-Yee Lui, Chris K C Wong, Will M Lee, C Yan Cheng
In adult mammalian testes, spermatids, most notably step 17-19 spermatids in stage IV-VIII tubules, are aligned with their heads pointing toward the basement membrane and their tails toward the tubule lumen. On the other hand, these polarized spermatids also align across the plane of seminiferous epithelium, mimicking planar cell polarity (PCP) found in other hair cells in cochlea (inner ear). This orderly alignment of developing spermatids during spermiogenesis is important to support spermatogenesis, such that the maximal number of developing spermatids can be packed and supported by a fixed population of differentiated Sertoli cells in the limited space of the seminiferous epithelium in adult testes...
September 15, 2017: Seminars in Cell & Developmental Biology
https://www.readbyqxmd.com/read/28922305/mayer-rokitansky-k%C3%A3-ster-hauser-syndrome-with-bilateral-ovarian-sertoli-cell-tumors-review-of-the-literature-and-report-of-a-rare-case
#4
Alexander L Juusela, Ilana Naghi, Suresh Thani
BACKGROUND: Patients with Mayer-Rokitansky-Küster-Hauser (MRKH) syndrome are infertile secondary to hypoplasia or complete agenesis of the uterus, yet they remain at risk of primary neoplasms of the ovaries because embryologically the uterus and ovaries develop via separate mechanisms. CASE: A 72-year-old nulliparous woman with a history of primary amenorrhea underwent an exploratory laparotomy for a suspected uterine fibroid. In addition to the pelvic mass, the patient was found to have findings consistent with MRKH syndrome...
September 15, 2017: Female Pelvic Medicine & Reconstructive Surgery
https://www.readbyqxmd.com/read/28919010/germ-cell-proliferation-and-apoptosis-during-testicular-regression-in-a-seasonal-breeding-fish-kept-in-captivity
#5
Yves Moreira Ribeiro, Santer Alvares de Matos, Fabricio Flavio Theophilo Domingos, Helio Batista Dos Santos, Augusto Bicalho Cruz Vieira, Nilo Bazzoli, Elizete Rizzo
Cell proliferation and apoptosis regulate germ cells stock and sperm production, eliminate anomalous gametes, and are essential parameters to consider in fish farming. Herein, spermatogenic activity as well as germ cell proliferation and apoptosis were assessed in Leporinus taeniatus, a seasonal breeding species from the São Francisco River basin, Brazil. Testes of 24 adult fishes from a farming station were sampled between December and July and processed for light and transmission electron microscopy and immunohistochemistry for PCNA and TUNEL assay...
September 12, 2017: Tissue & Cell
https://www.readbyqxmd.com/read/28915631/in-vivo-autophagy-and-biogenesis-of-autophagosomes-within-male-haploid-cells-during-spermiogenesis
#6
Ping Yang, Nisar Ahmed, Lingling Wang, Hong Chen, Yasir Waqas, Tengfei Liu, Abdul Haseeb, Nasrullah Bangulzai, Yufei Huang, Qiusheng Chen
Autophagy is a unique catabolic pathway that is linked to several physiological processes. However, its role in the process of spermiogenesis is largely unknown. The aim of the current study was to determine the in vivo role of autophagy and the origin of autophagosome membrane biogenesis within male haploid cells. Our immunohistochemistry results demonstrated that LC3 and ATG7 localization were increased dramatically in round to elongated spermatids (haploid cells) towards the lumen of seminiferous tubules, however, poorly expressed in the early stages of germ cells near the basal membrane...
August 22, 2017: Oncotarget
https://www.readbyqxmd.com/read/28914501/andrology-of-male-to-female-transsexuals-influence-of-cross-sex-hormone-therapy-on-testicular-function
#7
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
#8
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/28911170/sertoli-cell-number-defines-and-predicts-germ-and-leydig-cell-population-sizes-in-the-adult-mouse-testis
#9
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/28905938/triptolide-induces-sertoli-cell-apoptosis-in-mice-via-ros-jnk-dependent-activation-of-the-mitochondrial-pathway-and-inhibition-of-nrf2-mediated-antioxidant-response
#10
Yu Wang, Su-Han Guo, Xue-Jun Shang, Li-Sha Yu, Jian-Wei Zhu, Ang Zhao, Yan-Fen Zhou, Guo-Hua An, Qi Zhang, Bo Ma
Triptolide (TP), an oxygenated diterpene, has a variety of beneficial pharmacodynamic activities but its clinical applications are restricted due to severe testicular injury. This study aimed to delineate the molecular mechanisms of TP-induced testicular injury in vitro and in vivo. TP (5-50000 nmol/L) dose-dependently decreased the viability of TM4 Sertoli cells with an IC50 value of 669.5-269.45 nmol/L at 24 h. TP (125, 250, and 500 nmol/L) dose-dependently increased the accumulation of ROS, the phosphorylation of JNK, mitochondrial dysfunction and activation of the intrinsic apoptosis pathway in TM4 cells...
September 14, 2017: Acta Pharmacologica Sinica
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
#11
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/28900034/beta-catenin-directs-the-transformation-of-testis-sertoli-cells-to-ovarian-granulosa-like-cells-by-inducing-foxl2-expression
#12
Yaqiong Li, Lianjun Zhang, Yuqiong Hu, Min Chen, Feng Han, Yan Qin, Min Chen, Xiuhong Cui, Shuguang Duo, Fuchou Tang, Fei Gao
Sertoli and granulosa cells are two major types of somatic cells in the male and female gonads,respectively. Previous studies have shown that Sertoli and granulosa cells are derived from common progenitor cells and that differentiation of these two cell types is regulated by sex differentiation genes. The signaling pathway including the adhesion and transcription factor Ctnnb1 (cadherin-associated protein, beta 1, also known as β-catenin) regulates differentiation of granulosa cells in the absence of the transcription factor Sry, and over-activation of β-catenin in the presence of Sry leads to granulosa prior to sex determination...
September 12, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28898977/from-the-cover-metabolomics-reveals-a-role-of-betaine-in-prenatal-dbp-exposure-induced-epigenetic-transgenerational-failure-of-spermatogenesis-in-rats
#13
Beilei Yuan, Wei Wu, Minjian Chen, Hao Gu, Qiuqin Tang, Dan Guo, Ting Chen, Yiqiu Chen, Chuncheng Lu, Ling Song, Yankai Xia, Daozhen Chen, Virender K Rehan, Jiahao Sha, Xinru Wang
There is increasing concern that early-life exposure to endocrine disruptors affects male offspring reproduction. However, whether di-n-butyl phthalate (DBP), a widely used endocrine disruptor, has transgenerational effects and, if so, the exact underlying molecular mechanisms involved remain unknown. In our study, 5 of time-mated pregnant SD rats were exposed to 0 and 500 mg/kg DBP with corn oil as the vehicle via oral gavage from embryonic days (E8-E14). Epigenetic and metabolomic of testis were analyzed after post-natal 60 days...
August 1, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
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
#14
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/28884495/asymmetrical-size-and-functionality-of-the-pampas-deer-ozotoceros-bezoarticus-testes-right-testis-is-bigger-but-left-testis-is-more-efficient-in-spermatogenesis
#15
Rodolfo Ungerfeld, Matías Villagrán, Lorena Lacuesta, Noelia Vazquez, William Pérez
Information about gonadal asymmetries in ruminants is very scarce. In this work, we performed three complementary studies to compare characteristics of both testes: (i) weight and size of offspring and adult dead males; (ii) the tissue:fluid relationship determined by ultrasound scanning; and (iii) the spermatogenic status using fine needle aspiration cytology. The right testis was heavier than the left one in both offspring and adult animals and had greater width and volume in adult males than the left one...
September 7, 2017: Anatomia, Histologia, Embryologia
https://www.readbyqxmd.com/read/28880272/abcb1a-and-abcb1b-genes-function-differentially-in-blood-testis-barrier-dynamics-in-the-rat
#16
Linlin Su, Yan C Cheng, Will M Lee, Min Zhang, Fangfang Yang, Bin Zhao, Daishu Han, Yixun Liu, Dahai Hu
During spermatogenesis, immature spermatocytes traverse the blood-testis barrier (BTB) and enter the apical apartment of seminiferous epithelium for further development. This course involves extensive junction disassembly and reassembly at the BTB. P-glycoprotein is known to be coded by two genes in rodents, namely Abcb1a and Abcb1b. Our previous studies showed that simultaneously silencing Abcb1a and Abcb1b genes in Sertoli cells impeded BTB integrity. However, the individual role of Abcb1a and Abcb1b in regulating BTB dynamics remains uninvestigated...
September 7, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28878155/determination-of-highly-sensitive-biological-cell-model-systems-to-screen-bpa-related-health-hazards-using-pathway-studio
#17
Do-Yeal Ryu, Md Saidur Rahman, Myung-Geol Pang
Bisphenol-A (BPA) is a ubiquitous endocrine-disrupting chemical. Recently, many issues have arisen surrounding the disease pathogenesis of BPA. Therefore, several studies have been conducted to investigate the proteomic biomarkers of BPA that are associated with disease processes. However, studies on identifying highly sensitive biological cell model systems in determining BPA health risk are lacking. Here, we determined suitable cell model systems and potential biomarkers for predicting BPA-mediated disease using the bioinformatics tool Pathway Studio...
September 6, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28878091/kisspeptin-regulates-steroidogenesis-and-spermiation-in-anuran-amphibian
#18
Rosanna Chianese, Vincenza Ciaramella, Silvia Fasano, Riccardo Pierantoni, Rosaria Meccariello
Kisspeptin (Kp) system has a recognized role in the control of gonadotropic axis, at multiple levels. Recently, a major focus of research has been to assess any direct activity of this system on testis physiology. Using the amphibian anuran, Pelophylax esculentus, as animal model, we demonstrate - for the first time in non-mammalian vertebrate - that testis expresses both Kiss-1 and Gpr54 proteins during the annual sexual cycle and that ex vivo 17B-estradiol (E2, 10(-6) M) increases both proteins over control group...
October 2017: Reproduction: the Official Journal of the Society for the Study of Fertility
https://www.readbyqxmd.com/read/28878076/zika-virus-infects-human-sertoli-cells-and-modulates-the-integrity-of-the-in-vitro-blood-testis-barrier-model
#19
David N Siemann, Daniel P Strange, Payal N Maharaj, Pei-Yong Shi, Saguna Verma
Confirmed reports of ZIKV in human seminal fluid for months after the clearance of viremia suggest the ability of ZIKV to establish persistent infection in the seminiferous tubules, an immune privileged site in the testis protected by the blood-testis barrier, also called the Sertoli cell barrier (SCB). However, cellular targets of ZIKV in human testis and mechanisms by which the virus enters seminiferous tubules remain unclear. We demonstrate that primary human SCs were highly susceptible to ZIKV as compared to the closely related dengue virus and induced expression of IFN-α, key cytokines and cell-adhesion molecules (VCAM-1 and ICAM-1)...
September 6, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28873352/immunophenotypic-comparison-of-testicular-sclerosing-sertoli-cell-tumors-and-sertoli-cell-tumors-not-otherwise-specified
#20
Hector Mesa, Chen Zhang, Juan C Manivel, Thomas M Ulbright
Testicular Sertoli cell tumors (SCT) are rare and most fall into the category of SCT-not otherwise specified (SCT-NOS). Only a few additional types of SCT are recognized. Sclerosing SCT (S-SCT), originally described in 1991, comprises a small fraction of SCTs and was considered a specific entity until the 2016 revision of the World Health Organization classification of non-germ cell tumors, where it was classified as a morphologic variant of SCT-NOS. In a recent study, differences in expression of PAX2/PAX8, inhibin, androgen receptor and S100 protein between SCT-NOS and S-SCT were noted in a small number of cases...
September 2, 2017: Human Pathology
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