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spermatogonial stem cell

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https://www.readbyqxmd.com/read/29782571/epigenomic-and-single-cell-profiling-of-human-spermatogonial-stem-cells
#1
EDITORIAL
Akihiko Sakashita, Yu-Han V Yeh, Satoshi H Namekawa, Shau-Ping Lin
No abstract text is available yet for this article.
2018: Stem Cell Investigation
https://www.readbyqxmd.com/read/29781095/gasoline-exhaust-damages-spermatogenesis-through-downregulating-%C3%AE-6-integrin-and-%C3%AE-1-integrin-in-the-rat-model
#2
L Luo, E Li, S Zhao, J Wang, Z Zhu, Y Liu, J Luo, Z Zhao
The health influence of air pollution has been an international public health concern. Increasing evidence has suggested that air pollution has been associated with decreased sperm quality. However, the underlying molecular mechanisms are still not fully elucidated. We aimed to verify whether gasoline exhaust leads to reproductive impairment by injuring spermatogonial stem cells and explore its underlying molecular mechanism. Twenty male Sprague-Dawley rats were randomly divided into two groups: the exposure group (n = 10) and the control group (n = 10)...
May 20, 2018: Andrologia
https://www.readbyqxmd.com/read/29780056/potential-roles-of-the-poly-a-binding-proteins-in-translational-regulation-during-spermatogenesis
#3
Saffet Ozturk, Fatma Uysal
Spermatogenesis is briefly defined as the production of mature spermatozoa from spermatogonial stem cells at the end of a strictly regulated process. It is well known that, to a large extent, transcriptional activity ceases at mid-spermiogenesis. Several mRNAs transcribed during early stages of spermatogenesis are stored as ribonucleoproteins (RNPs). During the later stages, translational control of these mRNAs is mainly carried out in a time dependent-manner by poly(A)-binding proteins (PABPs) in cooperation with other RNA-binding proteins and translation-related factors...
May 18, 2018: Journal of Reproduction and Development
https://www.readbyqxmd.com/read/29776850/what-is-the-best-protocol-to-cryopreserve-immature-mouse-testicular-cell-suspensions
#4
Jaime Onofre, Katrien Faes, Prashant Kadam, Elena Vicini, Ans M M van Pelt, Ellen Goossens
RESEARCH QUESTION: From a clinical perspective, which parameters grant optimal cryopreservation of mouse testicular cell suspensions? DESIGN: We studied the effect of different cryopreservation rates, the addition of sugars, different vessels and the addition of an apoptotic inhibitor on the efficiency of testicular cell suspension cryopreservation. After thawing and warming, testicular cell suspensions were transplanted to recipient mice for further functional assay...
April 27, 2018: Reproductive Biomedicine Online
https://www.readbyqxmd.com/read/29772210/in-silico-analysis-seasonal-variation-and-gonadotropic-regulation-of-jag1-and-its-receptor-notch1-in-testis-of-spotted-snakehead-channa-punctatus
#5
Alivia Roy, Reetuparna Basak, Umesh Rai
The present study in seasonally breeding spotted snakehead Channa punctatus, for the first time in nonmammalian vertebrates, demonstrated correlation between reproductive phase-dependent testicular expression of ligand Jag1/receptor Notch1 and spermatogenic events. Testicular transcriptome sequencing data from our earlier study in C. punctatus was used in the present study to select the best transcript for jag1 (cpjag1) and notch1 (cpnotch1). The transcripts cpjag1 and cpnotch1 encoded full-length putative proteins of 1215 (cpJag1) and 2475 (cpNotch1) amino acids, respectively...
May 14, 2018: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/29769589/conserved-and-non-conserved-characteristics-of-porcine-glial-cell-line-derived-neurotrophic-factor-expressed-in-the-testis
#6
Kazue Kakiuchi, Kazumi Taniguchi, Hiroshi Kubota
Glial cell line-derived neurotrophic factor (GDNF) is essential for the self-renewal and proliferation of spermatogonial stem cells (SSCs) in mice, rats, and rabbits. Although the key extrinsic factors essential for spermatogonial proliferation in other mammals have not been determined, GDNF is one of the potential candidates. In this study, we isolated porcine GDNF (pGDNF) cDNAs from neonatal testis and generated recombinant pGDNF to investigate its biological activity on gonocytes/undifferentiated spermatogonia, including SSCs...
May 16, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29763586/postnatal-testis-development-in-the-collared-peccary-tayassu-tajacu-with-emphasis-on-spermatogonial-stem-cells-markers-and-niche
#7
Nathália de Lima E Martins Lara, Guilherme Mattos Jardim Costa, Gleide Fernandes de Avelar, Diva Anelie Guimarães, Luiz Renato de França
Collared peccaries (Tayassu tajacu) present a unique testis cytoarchitecture, where Leydig cells (LC) are mainly located in cords around the seminiferous tubules (ST) lobes. This peculiar arrangement is very useful to better investigate and understand the role of LC in spermatogonial stem cells (SSCs) biology and niche. Recent studies from our laboratory using adult peccaries have shown that the undifferentiated type A spermatogonia (Aund or SSCs) are preferentially located in ST regions adjacent to the intertubular compartment without LC...
May 12, 2018: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/29749669/in-silico-analysis-of-single-cell-rna-sequencing-data-from-3-and-7-days-old-mouse-spermatogonial-stem-cells-to-identify-their-differentially-expressed-genes-and-transcriptional-regulators
#8
Sajjad Sisakhtnezhad
Spermatogonial stem cells (SSCs), which are at the basis of spermatogenesis process, are valuable cells with different applications in biotechnology and regenerative medicine. Understanding the molecular basis of SSC self-renewal and differentiation at various developmental stages of the male organism is crucial to find key factors in the SSCs fate and function. Therefore, this study was aimed to use single-cell RNA-sequencing dataset analysis for identification of differentially expressed genes (DEGs) and their regulators in 3 and 7 days old mouse-derived single SSCs (mSSCs)...
May 11, 2018: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/29733421/chemotherapeutic-drugs-alter-functional-properties-and-proteome-of-mouse-testicular-germ-cells-in-vitro
#9
Polash Chandra Karmakar, Yeon-Jin Cho, Yong-Hee Kim, Sang-Eun Jung, Ju-Hee Jin, Bang-Jin Kim, Woo-Sung Kwon, Young-Hyun Kim, Myung-Geol Pang, Buom-Yong Ryu
Many of the testicular cancer-survived patients, treated with chemotherapeutic drugs, show infertility, preimplantation and postimplantation loss, and germ cell abnormality. Studies examining the negative effects of chemotherapeutic drugs on testicular germ cells are ongoing; however, information on the stemness properties and proteomic profiles of these cells are lacking. The present study investigated the effects of chemotherapeutic drugs etoposide, cisplatin, bleomycin, and their combination (BEP) on the physiology and stem cell activity of mouse germ cells in vitro...
April 27, 2018: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/29730571/spermatogonial-stem-cells-and-spermatogenesis-in-mice-monkeys-and-men
#10
Adetunji P Fayomi, Kyle E Orwig
Continuous spermatogenesis in post-pubertal mammals is dependent on spermatogonial stem cells (SSCs), which balance self-renewing divisions that maintain stem cell pool with differentiating divisions that sustain continuous sperm production. Rodent stem and progenitor spermatogonia are described by their clonal arrangement in the seminiferous epithelium (e.g., Asingle , Apaired or Aaligned spermatogonia), molecular markers (e.g., ID4, GFRA1, PLZF, SALL4 and others) and most importantly by their biological potential to produce and maintain spermatogenesis when transplanted into recipient testes...
April 21, 2018: Stem Cell Research
https://www.readbyqxmd.com/read/29713548/spermatogonial-stem-cell-transplantation-and-male-infertility-current-status-and-future-directions
#11
REVIEW
Connor M Forbes, Ryan Flannigan, Peter N Schlegel
Objective: To summarise the current state of research into spermatogonial stem cell (SSC) therapies with a focus on future directions, as SSCs show promise as a source for preserving or initiating fertility in otherwise infertile men. Materials and methods: We performed a search for publications addressing spermatogonial stem cell transplantation in the treatment of male infertility. The search engines PubMed and Google Scholar were used from 1990 to 2017. Search terms were relevant for spermatogonial stem cell therapies...
March 2018: Arab Journal of Urology
https://www.readbyqxmd.com/read/29703750/identification-of-substrates-of-the-small-rna-methyltransferase-hen1-in-mouse-spermatogonial-stem-cells-and-analysis-of-its-methyl-transfer-domain
#12
Ling Peng, Fengjuan Zhang, Renfu Shang, Xueyan Wang, Jiayi Chen, James J Chou, Jinbiao Ma, Ligang Wu, Ying Huang
Small noncoding RNAs (sncRNAs) regulate many genes in eukaryotic cells. Hua enhancer 1 (Hen1) is a 2'-O-methyltransferase that adds a methyl group to the 2'-OH of 3'-terminal nucleotide of sncRNAs. The types and properties of sncRNAs may vary among different species, and the domain composition, structure, and function of Hen1 proteins differ accordingly. In mammals, Hen1 specifically methylates sncRNAs called p-element-induced wimpy testis (PIWI)-interacting RNAs (piRNAs). However, other types of sncRNAs that are methylated by Hen1 have not yet been reported, and the structures and the substrates of mammalian Hen1 remain unknown...
April 27, 2018: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29692670/recent-advances-of-in-vitro-culture-systems-for-spermatogonial-stem-cells-in-mammals
#13
REVIEW
Mahesh G Sahare, Suyatno, Hiroshi Imai
Background: Spermatogonial stem cells (SSCs) in the mammalian testis are unipotent stem cells for spermatozoa. They show unique cell characteristics as stem cells and germ cells after being isolated from the testis and cultured in vitro. This review introduces recent progress in the development of culture systems for the establishment of SSC lines in mammalian species, including humans. Methods: Based on the published reports, the isolation and purification of SSCs, identification and characteristics of SSCs, and culture system for mice, humans, and domestic animals have been summarized...
April 2018: Reproductive Medicine and Biology
https://www.readbyqxmd.com/read/29683733/cep55-overexpression-causes-male-specific-sterility-in-mice-by-suppressing-foxo1-nuclear-retention-through-sustained-activation-of-pi3k-akt-signaling
#14
Debottam Sinha, Murugan Kalimutho, Josephine Bowles, Ai-Leen Chan, D Jo Merriner, Amanda L Bain, Jacinta L Simmons, Raimundo Freire, J Alejandro Lopez, Robin M Hobbs, Moira K O'Bryan, Kum Kum Khanna
Spermatogenesis is a dynamic process involving self-renewal and differentiation of spermatogonial stem cells, meiosis, and ultimately, the differentiation of haploid spermatids into sperm. Centrosomal protein (CEP)-55 is necessary for somatic cell abscission during cytokinesis. It facilitates equal segregation of cytoplasmic contents between daughter cells by recruiting endosomal sorting complex required for transport machinery (ESCRT) at the midbody. In germ cells, CEP55, in partnership with testes expressed-14 protein (TEX14), has also been shown to be an integral component of intercellular bridge before meiosis...
April 17, 2018: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/29681540/fgf2-has-distinct-molecular-functions-from-gdnf-in-the-mouse-germline-niche
#15
Kaito Masaki, Mizuki Sakai, Shunsuke Kuroki, Jun-Ichiro Jo, Kazuo Hoshina, Yuki Fujimori, Kenji Oka, Toshiyasu Amano, Takahiro Yamanaka, Makoto Tachibana, Yasuhiko Tabata, Tanri Shiozawa, Osamu Ishizuka, Shinichi Hochi, Seiji Takashima
Both glial cell line-derived neurotrophic factor (GDNF) and fibroblast growth factor 2 (FGF2) are bona fide self-renewal factors for spermatogonial stem cells, whereas retinoic acid (RA) induces spermatogonial differentiation. In this study, we investigated the functional differences between FGF2 and GDNF in the germline niche by providing these factors using a drug delivery system in vivo. Although both factors expanded the GFRA1+ subset of undifferentiated spermatogonia, the FGF2-expanded subset expressed RARG, which is indispensable for proper differentiation, 1...
April 16, 2018: Stem Cell Reports
https://www.readbyqxmd.com/read/29660605/functional-assessment-of-spermatogonial-stem-cell-purity-in-experimental-cell-populations
#16
REVIEW
Tessa Lord, Jon M Oatley
Historically, research in spermatogonial biology has been hindered by a lack of validated approaches to identify and isolate pure populations of the various spermatogonial subsets for in-depth analysis. In particular, although a number of markers of the undifferentiated spermatogonial population have now been characterized, standardized methodology for assessing their specificity to the spermatogonial stem cell (SSC) and transit amplifying progenitor pools has been lacking. To date, SSC content within an undefined population of spermatogonia has been inferred using either lineage tracing or spermatogonial transplantation analyses which generate qualitative and quantitative data, respectively...
April 3, 2018: Stem Cell Research
https://www.readbyqxmd.com/read/29660000/spermatogonial-behavior-in-marmoset-a-new-generation-their-kinetics-and-niche
#17
A L Caldeira-Brant, L Eras-Garcia, D Alves-Freitas, F R C L Almeida, H Chiarini-Garcia
STUDY QUESTION: Could a more detailed evaluation of marmoset spermatogonial morphology, kinetics, and niches using high-resolution light microscopy (HRLM) lead to new findings? SUMMARY ANSWER: Three new classes of marmoset spermatogonia, which were not evenly distributed in terms of number and position along the basal membrane, and an extra premeiotic cell division not present in humans were identified using HRLM. WHAT IS KNOWN ALREADY: The seminiferous epithelium cycle (SEC) of marmosets is divided into nine stages when based on the acrosome system, and several spermatogenic stages can usually be recognized within the same tubular cross-section...
April 11, 2018: Molecular Human Reproduction
https://www.readbyqxmd.com/read/29657241/expression-dynamics-of-self-renewal-factors-for-spermatogonial-stem-cells-in-the-mouse-testis
#18
Mizuki Sakai, Kaito Masaki, Shota Aiba, Masaaki Tone, Seiji Takashima
Glial cell line-derived neurotrophic factor (GDNF) and fibroblast growth factor 2 (FGF2) are bona fide self-renewal factors for spermatogonial stem cells (SSCs). Although GDNF is indispensable for the maintenance of SSCs, the role of FGF2 in the testis remains to be elucidated. To clarify this, the expression dynamics and regulatory mechanisms of Fgf2 and Gdnf in the mouse testes were analyzed. It is well known that Sertoli cells express Gdnf, and its receptor is expressed in a subset of undifferentiated spermatogonia, including SSCs...
April 16, 2018: Journal of Reproduction and Development
https://www.readbyqxmd.com/read/29649409/the-forkhead-transcription-factor-foxc2-is-required-for-maintaining-murine-spermatogonial-stem-cells
#19
Chao Wei, Hao Lin, Sheng Cui
Continuous spermatogenesis from puberty to old age in males relies on spermatogonial stem cells (SSCs) that possess the property of self-renewal and differentiation. The delicate balance between self-renewal and differentiation is of great importance. In mice, SSCs exist as a subpopulation of undifferentiated spermatogonia. SSCs are controlled by intrinsic molecular pathways which can be activated by extrinsic signals. Our results here first show that the expression of forkhead box C2 (FOXC2) is restricted to GFRα1 positive spermatogonia in the testis...
March 13, 2018: Stem Cells and Development
https://www.readbyqxmd.com/read/29649254/uxt-is-required-for-spermatogenesis-in-mice
#20
Eric D Schafler, Phillip A Thomas, Susan Ha, Yu Wang, Keria Bermudez-Hernandez, Zuojian Tang, David Fenyö, Margarita Vigodner, Susan K Logan
Male mammals must simultaneously produce prodigious numbers of sperm and maintain an adequate reserve of stem cells to ensure continuous production of gametes throughout life. Failures in the mechanisms responsible for balancing germ cell differentiation and spermatogonial stem cell (SSC) self-renewal can result in infertility. We discovered a novel requirement for Ubiquitous Expressed Transcript (UXT) in spermatogenesis by developing the first knockout mouse model for this gene. Constitutive deletion of Uxt is embryonic lethal, while conditional knockout in the male germline results in a Sertoli cell-only phenotype during the first wave of spermatogenesis that does not recover in the adult...
2018: PloS One
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