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Spermatogenesis

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https://www.readbyqxmd.com/read/28820536/atp7a-and-atp7b-regulate-copper-homeostasis-in-developing-male-germ-cells-in-mice
#1
Mateusz Ogórek, Małgorzata Lenartowicz, Rafał Starzyński, Aneta Jończy, Robert Staroń, Andrzej Doniec, Wojciech Krzeptowski, Aleksandra Bednarz, Olga Pierzchała, Paweł Lipiński, Zenon Rajfur, Zbigniew Baster, Patrycja Gibas-Tybur, Paweł Grzmil
The maintenance of copper homeostasis is critical for all cells. As learned from mice with disturbed copper metabolism, this trace element is also important for spermatogenesis. The experiments conducted in yeasts have demonstrated that appropriate copper level must be preserved to enable meiosis progression; however, increased copper level is toxic for cells. This study aims to analyze the expression profile of Atp7a and Atp7b and other genes encoding copper-related proteins during spermatogenesis in mice...
August 18, 2017: Metallomics: Integrated Biometal Science
https://www.readbyqxmd.com/read/28820276/attenuation%C3%A2-of-sulfite-induced-testicular-injury-in-rats-by-zingiber-officinale-roscoe
#2
Akbar Afkhami Fathabad, Shahnaz Shekarforoush, Maryam Hoseini, Zahra Ebrahimi
Sulfite salts, including sodium metabisulfte, are widely used as preservatives in foods and pharmaceutical agents. Previous studies suggest that oxidative stress may be an important mediator of testicular injury. The present study was designed to elucidate the effect of exposure to sodium metabisulfite by gavage without or with Zingiber officinale (ginger) extract on the rat testes. Thirty-two male Wistar rats were randomly divided into control, ginger-treated (500 mg/kg/day), sodium metabisulfite- (SMB-) treated (260 mg/kg/day), and SMB + ginger- (SZ-) treated groups...
August 18, 2017: Journal of Dietary Supplements
https://www.readbyqxmd.com/read/28818485/role-of-stromal-derived-factor-1a-sdf-1a-for-spermatogenesis-of-busulfan-injured-rats
#3
Neda Khanlarkhani, Keywan Mortezaee, Fardin Amidi, Ebrahim Kharazinejad, Cordian Beyer, Maryam Baazm, Parichehr Pasbakhsh, Azar Pazhohan, Aligholi Sobhani, Adib Zendedel
SDF-1a is a member of CXC chemokine family that plays a crucial role in stem cell migration, cell apoptosis and development. The role of intra-scrotal administration of SDF-1a in spermatogenesis of busulfan-treated rats was investigated in this study. Two injections of busulfan (15mg/kg) with a 14days interval between were given intraperitoneally to male Wistar rats. Rats were then treated for seven days with 500ng/mL SDF-1a. Real-time PCR and immunohistochemistry were performed for evaluation of various cell markers for proliferation and spermatogenesis, and sperm parameters were assessed...
August 14, 2017: Reproductive Toxicology
https://www.readbyqxmd.com/read/28816268/-expression-and-localization-of-transmembrane-protein-cmtm2-in-human-testis-and-sperm
#4
X W Zhang, K Lan, W B Yang, Q Li, Y P Zhao, H Q Yin, B Kite, W J Bai, T Xu
OBJECTIVE: To study the expression of transmembrane protein CMTM2 in the testis and sperm of adult males and to approach the potential function of the protein in the male reproductive system. METHODS: The expression of CMTM2 in human testis and sperm was confirmed by Western blot. Immunohistochemical staining was used for detecting CMTM2 localization in the testis tissue, TRITC-CMTM2 and FITC-Hoechst double immunofluorescence staining was performed to examine the subcellular localization of CMTM2 in the human sperm before and after acrosome reaction, that is, immunofluorescent staining was used for detecting CMTM2 localization in both the testis and sperm before and after the acrosome reaction...
August 18, 2017: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/28810916/the-catsper-channel-and-its-roles-in-male-fertility-a-systematic-review
#5
REVIEW
Xiang-Hong Sun, Ying-Ying Zhu, Lin Wang, Hong-Ling Liu, Yong Ling, Zong-Li Li, Li-Bo Sun
The Catsper channel is a sperm-specific, Ca(2+)-permeable, pH-dependent, and low voltage-dependent channel that is essential for the hyperactivity of sperm flagellum, chemotaxis towards the egg, capacitation and acrosome reaction. All of these physiological events require calcium entry into sperm cells. Remarkably, Catsper genes are exclusively expressed in the testis during spermatogenesis, and are sensitive to ion channel-induced pH change, such as NHEs, Ca(2+)ATPase, K(+) channel, Hv1 channel and HCO3(-) transporters...
August 15, 2017: Reproductive Biology and Endocrinology: RB&E
https://www.readbyqxmd.com/read/28809393/ythdc2-is-an-n-6-methyladenosine-binding-protein-that-regulates-mammalian-spermatogenesis
#6
Phillip J Hsu, Yunfei Zhu, Honghui Ma, Yueshuai Guo, Xiaodan Shi, Yuanyuan Liu, Meijie Qi, Zhike Lu, Hailing Shi, Jianying Wang, Yiwei Cheng, Guanzheng Luo, Qing Dai, Mingxi Liu, Xuejiang Guo, Jiahao Sha, Bin Shen, Chuan He
N(6)-methyladenosine (m(6)A) is the most common internal modification in eukaryotic mRNA. It is dynamically installed and removed, and acts as a new layer of mRNA metabolism, regulating biological processes including stem cell pluripotency, cell differentiation, and energy homeostasis. m(6)A is recognized by selective binding proteins; YTHDF1 and YTHDF3 work in concert to affect the translation of m(6)A-containing mRNAs, YTHDF2 expedites mRNA decay, and YTHDC1 affects the nuclear processing of its targets. The biological function of YTHDC2, the final member of the YTH protein family, remains unknown...
August 15, 2017: Cell Research
https://www.readbyqxmd.com/read/28809392/mettl3-mediated-m-6-a-regulates-spermatogonial-differentiation-and-meiosis-initiation
#7
Kai Xu, Ying Yang, Gui-Hai Feng, Bao-Fa Sun, Jun-Qing Chen, Yu-Fei Li, Yu-Sheng Chen, Xin-Xin Zhang, Chen-Xin Wang, Li-Yuan Jiang, Chao Liu, Ze-Yu Zhang, Xiu-Jie Wang, Qi Zhou, Yun-Gui Yang, Wei Li
METTL3 catalyzes the formation of N(6)-methyl-adenosine (m(6)A) which has important roles in regulating various biological processes. However, the in vivo function of Mettl3 remains largely unknown in mammals. Here we generated germ cell-specific Mettl3 knockout mice and demonstrated that Mettl3 was essential for male fertility and spermatogenesis. The ablation of Mettl3 in germ cells severely inhibited spermatogonial differentiation and blocked the initiation of meiosis. Transcriptome and m(6)A profiling analysis revealed that genes functioning in spermatogenesis had altered profiles of expression and alternative splicing...
August 15, 2017: Cell Research
https://www.readbyqxmd.com/read/28807164/effect-of-chinese-herbal-medicine-on-male-infertility
#8
Dan Jiang, Alberto Coscione, Lily Li, Bai-Yun Zeng
Male infertility normally refers a male's inability to cause pregnancy in a fertile female partner after 1 year of unprotected intercourse. Male infertility in recent years has been attracting increasing interest from public due to the evidence in decline in semen quality. There are many factors contributing to the male infertility including abnormal spermatogenesis; reproductive tract anomalies or obstruction; inadequate sexual and ejaculatory functions; and impaired sperm motility, imbalance in hormone levels, and immune system dysfunction...
2017: International Review of Neurobiology
https://www.readbyqxmd.com/read/28804967/comparative-proteomic-analysis-of-different-developmental-stages-of-swamp-buffalo-testicular-seminiferous-tubules
#9
P-F Zhang, Y-L Huang, Q Fu, F-M Chen, Y-Q Lu, X-W Liang, M Zhang
With ageing, many protein components change markedly during mammalian spermatogenesis. Most of these proteins have yet to be characterized and verified. Here, we have employed two-dimensional electrophoresis coupled to tandem mass spectrometry to explore the different proteins from pre-pubertal, pubertal and post-pubertal swamp buffalo testicular seminiferous tubules. The results showed that 25 protein spots were differentially expressed among developmental stages, and 13 of them were successfully identified by mass spectrometry...
August 13, 2017: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/28803779/chromodomain-protein-cdyl-acts-as-a-crotonyl-coa-hydratase-to-regulate-histone-crotonylation-and-spermatogenesis
#10
Shumeng Liu, Huajing Yu, Yongqing Liu, Xinhua Liu, Yu Zhang, Chen Bu, Shuai Yuan, Zhe Chen, Guojia Xie, Wanjin Li, Bosen Xu, Jianguo Yang, Lin He, Tong Jin, Yundong Xiong, Luyang Sun, Xiaohui Liu, Chunsheng Han, Zhongyi Cheng, Jing Liang, Yongfeng Shang
Lysine crotonylation (Kcr) is a newly identified histone modification that is associated with active transcription in mammalian cells. Here we report that the chromodomain Y-like transcription corepressor CDYL negatively regulates histone Kcr by acting as a crotonyl-CoA hydratase to convert crotonyl-CoA to β-hydroxybutyryl-CoA. We showed that the negative regulation of histone Kcr by CDYL is intrinsically linked to its transcription repression activity and functionally implemented in the reactivation of sex chromosome-linked genes in round spermatids and genome-wide histone replacement in elongating spermatids...
July 29, 2017: Molecular Cell
https://www.readbyqxmd.com/read/28803373/th2a-is-phosphorylated-at-meiotic-centromere-by-haspin
#11
Masashi Hada, Jihye Kim, Erina Inoue, Yuko Fukuda, Hiromitsu Tanaka, Yoshinori Watanabe, Yuki Okada
Histone phosphorylation is sometimes associated with mitosis and meiosis. We have recently identified a phosphorylation of the 127th threonine on TH2A (pTH2A), a germ cell-specific H2A variant, in condensed spermatids and mitotic early preimplantation embryos of mice. Here, we further report the existence of pTH2A at the centromeres in metaphase I spermatocytes and oocytes. Moreover, we identified Haspin, a known kinase for the 3rd threonine on H3, is responsible for pTH2A in vivo. In contrast to the severe meiotic defect in oocytes treated with a Haspin inhibitor, pTH2A-deficient mice, in which the 127th threonine was replaced by alanine, maintained the fertility and exhibited no obvious defect in both oocytes and spermatogenesis...
August 12, 2017: Chromosoma
https://www.readbyqxmd.com/read/28794165/steroidogenesis-during-postnatal-testicular-development-of-galea-spixii
#12
Paulo Ramos da Silva Santos, Francilieusa Delys Oliveira, Maria Angélica Machado Arroyo, Moacir Franco Oliveira, Patricia Castelucci, Alan Conley, Antônio Chaves de Assis Neto
The androgen/estrogen balance is essential for normal sexual development and reproduction in mammals. Studies performed herein investigated the potential for estrogen synthesis in cells of the testes of a hystricomorph rodent, Galea spixii. The study characterized the expression of the key enzymes responsible for estrogen and androgen synthesis, cytochromes P450 aromatase (P450arom), 17α-hydroxylase/17,20-lyase (P450c17) respectively, as well as the redox partner NADPH cytochrome P450 oxido-reductase (CPR) required to support electron transfer and catalysis of these P450s, by immunohistochemistry (IHC) and quantitative polymerase chain reaction (qPCR) analysis, throughout postnatal sexual development...
August 8, 2017: Reproduction: the Official Journal of the Society for the Study of Fertility
https://www.readbyqxmd.com/read/28783592/the-efficiency-of-spermatogenesis-and-the-support-capacity-of-sertoli-cells-in-characiformes
#13
Maira da Silva Rodrigues, Diógenes Henrique de Siqueira-Silva, Patrícia Postingel Quirino, Alexandre Ninhaus-Silveira, Rosicleire Veríssimo-Silveira
This stereological analysis of the types of germ cells and the number of Sertoli cells per cyst in Astyanax altiparanae testes during spermatogenesis is the first such report in Characiformes. Testes of 25 male A. altiparanae were examined. Based on the number of spermatogonia B per cyst (469.2 ± 9.92), we estimated that spermatogonia undergo at least nine mitotic divisions before differentiating into primary spermatocytes. There are four spermatogonia types: undifferentiated spermatogonia A*, undifferentiated spermatogonia, differentiated spermatogonia, and type B spermatogonia...
July 27, 2017: Theriogenology
https://www.readbyqxmd.com/read/28782295/activation-of-tlr-signalling-regulates-microwave-radiation-mediated-impairment-of-spermatogenesis-in-rat-testis
#14
H Wu, D Wang, Y Meng, H Ning, X Liu, Y Xie, L Cui, S Wang, X Xu, R Peng
Microwave radiation could increase the expression of pro-inflammatory cytokines in rat Sertoli cells, which may impair spermatogenesis. However, the mechanisms that microwave radiation induces the cytokine expression in Sertoli cells remain to be clarified. The activation of TLRs by their ligands can trigger a common signalling pathway to upregulate inflammatory cytokines such as IL-1, IL-6, IL-12 and TNF-α. Microwave radiation can increase the expression of TLRs in lymphocytes. The purpose of this study was to determine the effect of microwave radiation on the TLRs in rat testis...
August 6, 2017: Andrologia
https://www.readbyqxmd.com/read/28782242/effects-of-hyper-and-hypothyroidism-on-the-development-and-proliferation-of-testicular-cells-in-prepubertal-rats
#15
Mohamed Babo Fadlalla, Quanwei Wei, Jaafar Sulieman Fedail, Asif Mehfooz, Dagan Mao, Fangxiong Shi
Thyroid hormones are important in the development and regulation of testes. This study was conducted to determine the effects of hyper- and hypothyroidism on testicular development in prepubertal rats aged 20-70 days. Weaning male rats (20 days old) until day 70 age were randomly divided into four groups: control, hyperthyroid (hyper-T), hypothyroid (hypo-T) and hypothyroid treated with thyroxine (T4) (hypo-T+T4). The results indicated that thyroid hormones caused a significant effect in body and testis weights, and food and water consumption...
August 7, 2017: Animal Science Journal, Nihon Chikusan Gakkaihō
https://www.readbyqxmd.com/read/28780960/expression-of-glucose-transporter-8-glut8-in-spermatogenesis-of-adult-boar-testes
#16
Huaming Xi, Zhen Zhang, Rui Ji, Hui Shen, Xiaorui Fan, Qinghong Li, Xiyun Bai, Zhixue Cheng, Junping He
The present study was designed to investigate the glucose transporter 8 (GLUT8) expression and localization in adult boar testis. Localization and expression of GLUT8 were conducted with Western Blotting, immunohistochemistry and reverse transcription-polymerase chain reaction (RT-PCR) methods GLUT8 protein and mRNA were expressed in the boar testes. The results of Western Blotting analysis showed specificity of the antibody for protein of boar testes. The immunohistochemistry results showed that GLUT8 protein mainly localized in spermatocytes, round spermatids and elongated spermatids of the seminiferous tubules in the adult boar testes...
August 3, 2017: Acta Histochemica
https://www.readbyqxmd.com/read/28778097/progress-and-future-prospect-of-in-vitro-spermatogenesis
#17
REVIEW
Fahar Ibtisham, Jiang Wu, Mei Xiao, Lilong An, Zachary Banker, Aamir Nawab, Yi Zhao, Guanghui Li
Infertility has become a major health issue in the world. It affects the social life of couples and of all infertility cases; approximately 40-50% is due to "male factor" infertility. Male infertility could be due to genetic factors, environment or due to gonadotoxic treatment. Developments in reproductive biotechnology have made it possible to rescue fertility and uphold biological fatherhood. In vitro production of haploid male germ cell is a powerful tool, not only for the treatment of infertility including oligozoospermic or azoospermic patient, but also for the fertility preservation in pre-pubertal boys whose gonadal function is threatened by gonadotoxic therapies...
July 27, 2017: Oncotarget
https://www.readbyqxmd.com/read/28777437/double-sex-and-mab-3-related-transcription-factor-1-regulates-differentiation-and-proliferation-in-dairy-goat-male-germline-stem-cells
#18
Yudong Wei, Shufang Cai, Fanglin Ma, Ying Zhang, Zhe Zhou, Shuanshuan Xu, Mengfei Zhang, Sha Peng, Jinlian Hua
The protein encoded by double sex and mab-3 related transcription factor 1 (Dmrt1)gene contains a double sex/mab-3 domain, which was considered as one of the most conservative structures in sex determination. However, its effect on spermatogenesis of dairy goat spermatogonial stem cells (SSCs) remains to be clarified. For the first time, the roles of Dmrt1 in spermatogenesis of livestock are highlighted. Here, we investigated the expression pattern of Dmrt1 in the testes of dairy goats. Dmrt1 primarily located in undifferentiated SSCs...
August 4, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28774773/degradation-of-extracellular-dna-by-dnase1-significantly-reduces-testicular-damage-after-testicular-torsion-in-rats
#19
Michael Boettcher, Dennis Meier, Miguel Jiménez-Alcázar, Georg Eschenburg, Stefan Mietzsch, Deirdre Vincent, Michaela Klinke, Magdalena Trochimiuk, Birgit Appl, Bastian Tiemann, Robert Bergholz, Konrad Reinshagen, Tobias A Fuchs
OBJECTIVE: To examine the effects of DNase1 treatment on testicular damage after TT aim of this study. It has been demonstrated that testicular torsion (TT) induces thrombus formation and that anticoagulation significantly reduces testicular damage after TT. It was hypothesized that these thrombi are dependent on neutrophil extracellular traps (NETs) and thus NETs disintegration would reduce testicular cell damage. METHODS: In 10 rats a sham operation was performed...
July 31, 2017: Urology
https://www.readbyqxmd.com/read/28774758/dmrt-proteins-and-coordination-of-mammalian-spermatogenesis
#20
Teng Zhang, David Zarkower
DMRT genes encode a deeply conserved family of transcription factors that share a unique DNA binding motif, the DM domain. DMRTs regulate development in a broad variety of metazoans and they appear to have controlled sexual differentiation for hundreds of millions of years. In mice, starting during embryonic development, three Dmrt genes act sequentially to help establish and maintain spermatogenesis. Dmrt1 has notably diverse functions that include repressing pluripotency genes and promoting mitotic arrest in embryonic germ cells, reactivating prospermatogonia perinatally, establishing and maintaining spermatogonial stem cells (SSCs), promoting spermatogonial differentiation, and controlling the mitosis/meiosis switch...
July 25, 2017: Stem Cell Research
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