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Kaibori Y, Tamoto S, Okuda S, Matsuo K, Nakayama T, Nagakubo D. CCL28: A Promising Biomarker for Assessing Salivary Gland Functionality and Maintaining Healthy Oral Environments. BIOLOGY 2024; 13:147. [PMID: 38534417 DOI: 10.3390/biology13030147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Revised: 02/20/2024] [Accepted: 02/23/2024] [Indexed: 03/28/2024]
Abstract
The oral cavity serves as the primary path through which substances from the outside world enter our body. Therefore, it functions as a critical component of host defense. Saliva is essential for maintaining a stable oral environment by catching harmful agents, including pathogens, allergens, and chemicals, in the air or food. CCL28, highly expressed in mucosal tissues, such as the colon and salivary glands, is a chemokine that attracts CCR10/CCR3 expressing cells. However, the role of CCL28 in salivary gland formation remains unclear. In this study, we investigated the salivary gland structure in CCL28-deficient mice. Histological analysis showed decreased staining intensity of Alcian blue, which detects acidic mucous, reduced expression of MUC2, and higher infiltration of gram-positive bacteria in the salivary glands of CCL28-deficient mice. In addition, CCL28-deficient mice contained ectopically MUC2-expressed cells in the ducts and reduced the expression of cytokeratin 18, a marker for ductal cells, within the submandibular glands, resulting in decreased duct numbers. Additionally, the submandibular glands of CCL28-deficient mice showed reduced expression of several stem cell markers. These results suggest that CCL28 regulates saliva production via proper differentiation of salivary gland stem cells and could be a valuable biomarker of salivary gland function.
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Affiliation(s)
- Yuichiro Kaibori
- Division of Health and Hygienic Sciences, Faculty of Pharmaceutical Sciences, Himeji Dokkyo University, 7-2-1 Kamiohno, Himeji 670-8524, Hyogo, Japan
- Laboratory of Analytics for Biomolecules, Faculty of Pharmaceutical Science, Setsunan University, 45-1 Nagaotoge-cho, Hirakata-shi 573-0101, Osaka, Japan
| | - Saho Tamoto
- Division of Health and Hygienic Sciences, Faculty of Pharmaceutical Sciences, Himeji Dokkyo University, 7-2-1 Kamiohno, Himeji 670-8524, Hyogo, Japan
| | - Sayoko Okuda
- Division of Health and Hygienic Sciences, Faculty of Pharmaceutical Sciences, Himeji Dokkyo University, 7-2-1 Kamiohno, Himeji 670-8524, Hyogo, Japan
| | - Kazuhiko Matsuo
- Division of Chemotherapy, Kindai University Faculty of Pharmacy, 3-4-1 Kowakae, Higashi-Osaka 577-8502, Osaka, Japan
| | - Takashi Nakayama
- Division of Chemotherapy, Kindai University Faculty of Pharmacy, 3-4-1 Kowakae, Higashi-Osaka 577-8502, Osaka, Japan
| | - Daisuke Nagakubo
- Division of Health and Hygienic Sciences, Faculty of Pharmaceutical Sciences, Himeji Dokkyo University, 7-2-1 Kamiohno, Himeji 670-8524, Hyogo, Japan
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Wanjari UR, Gopalakrishnan AV. A review on immunological aspects in male reproduction: An immune cells and cytokines. J Reprod Immunol 2023; 158:103984. [PMID: 37390629 DOI: 10.1016/j.jri.2023.103984] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 06/17/2023] [Accepted: 06/25/2023] [Indexed: 07/02/2023]
Abstract
The male reproductive system, particularly the male gamete, offers a unique barrier to the immune system. The growing germ cells in the testis need to be shielded from autoimmune damage. Hence the testis has to establish and sustain an immune-privileged milieu. Sertoli cells create this safe space, protected by the blood-testis barrier. Cytokines are a type of immune reaction that can positively and negatively affect male reproductive health. Inflammation, disease, and obesity are just a few physiological conditions for which cytokines mediate signals. They interact with steroidogenesis, shaping the adrenals and testes to produce the hormones needed for survival. In particular pathological condition, including autoimmune disorders, contains high levels of the same cytokines in semen that play an essential role in the immunomodulation of the male gonad. This review focuses on understanding the immunological role of cytokines in the control and development of male reproduction. Also, in maintaining male reproductive health and diseases linked with their aberrant function in the testis.
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Affiliation(s)
- Uddesh Ramesh Wanjari
- Department of Biomedical Sciences, School of Bio-Sciences and Technology, Vellore Institute of Technology (VIT), Vellore, Tamil Nadu 632014, India
| | - Abilash Valsala Gopalakrishnan
- Department of Biomedical Sciences, School of Bio-Sciences and Technology, Vellore Institute of Technology (VIT), Vellore, Tamil Nadu 632014, India.
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Hosseini S, Moody SC, Fietz D, Indumathy S, Schuppe HC, Hedger MP, Loveland KL. The changing landscape of immune cells in the fetal mouse testis. Histochem Cell Biol 2022; 158:345-368. [PMID: 35829816 PMCID: PMC9512757 DOI: 10.1007/s00418-022-02129-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/13/2022] [Indexed: 11/30/2022]
Abstract
Fetal testis growth involves cell influx and extensive remodeling. Immediately after sex determination in mouse, macrophages enable normal cord formation and removal of inappropriately positioned cells. This study provides new information about macrophages and other immune cells after cord formation in fetal testes, including their density, distribution, and close cellular contacts. C57BL6J mouse testes from embryonic day (E) 13.5 to birth (post-natal day 0; PND0), were examined using immunofluorescence, immunohistochemistry, and RT-qPCR to identify macrophages (F4/80, CD206, MHCII), T cells (CD3), granulocytes/neutrophils (Ly6G), and germ cells (DDX4). F4/80+ cells were the most abundant, comprising 90% of CD45+ cells at E13.5 and declining to 65% at PND0. Changes in size, shape, and markers (CD206 and MHCII) documented during this interval align with the understanding that F4/80+ cells have different origins during embryonic life. CD3+ cells and F4/80−/MHCII+ were absent to rare until PND0. Ly6G+ cells were scarce at E13.5 but increased robustly by PND0 to represent half of the CD45+ cells. These immunofluorescence data were in accord with transcript analysis, which showed that immune marker mRNAs increased with testis age. F4/80+ and Ly6G+ cells were frequently inside cords adjacent to germ cells at E13.5 and E15.5. F4/80+ cells were often in clusters next to other immune cells. Macrophages inside cords at E13.5 and E15.5 (F4/80Hi/CD206+) were different from macrophages at PND0 (F4/80Dim/CD206−), indicating that they have distinct origins. This histological quantification coupled with transcript information identifies new cellular interactions for immune cells in fetal testis morphogenesis, and highlights new avenues for studies of their functional significance.
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Affiliation(s)
- Samira Hosseini
- Centre for Reproductive Health, Hudson Institute of Medical Research, 27-31 Wright St, Clayton, VIC, 3168, Australia.,Department of Molecular and Translational Sciences, Monash University, Clayton, VIC, Australia
| | - Sarah C Moody
- Centre for Reproductive Health, Hudson Institute of Medical Research, 27-31 Wright St, Clayton, VIC, 3168, Australia.,Department of Molecular and Translational Sciences, Monash University, Clayton, VIC, Australia
| | - Daniela Fietz
- Institute of Veterinary Anatomy, Histology and Embryology, Justus Liebig University Giessen, Giessen, Germany
| | - Sivanjah Indumathy
- Centre for Reproductive Health, Hudson Institute of Medical Research, 27-31 Wright St, Clayton, VIC, 3168, Australia.,Department of Molecular and Translational Sciences, Monash University, Clayton, VIC, Australia
| | - Hans-Christian Schuppe
- Department of Urology, Pediatric Urology and Andrology, Justus Liebig University Giessen, Giessen, Germany
| | - Mark P Hedger
- Centre for Reproductive Health, Hudson Institute of Medical Research, 27-31 Wright St, Clayton, VIC, 3168, Australia.,Department of Molecular and Translational Sciences, Monash University, Clayton, VIC, Australia.,Department of Anatomy and Developmental Biology, School of Biomedical Sciences, Monash University, Clayton, VIC, Australia
| | - Kate L Loveland
- Centre for Reproductive Health, Hudson Institute of Medical Research, 27-31 Wright St, Clayton, VIC, 3168, Australia. .,Department of Molecular and Translational Sciences, Monash University, Clayton, VIC, Australia. .,Department of Anatomy and Developmental Biology, School of Biomedical Sciences, Monash University, Clayton, VIC, Australia.
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Elrashidy RA, Hasan RA. Stromal cell-derived factor-1α predominantly mediates the ameliorative effect of linagliptin against cisplatin-induced testicular injury in adult male rats. Cytokine 2020; 136:155260. [DOI: 10.1016/j.cyto.2020.155260] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2020] [Revised: 08/09/2020] [Accepted: 08/18/2020] [Indexed: 12/12/2022]
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Zheng Y, Feng T, Zhang P, Lei P, Li F, Zeng W. Establishment of cell lines with porcine spermatogonial stem cell properties. J Anim Sci Biotechnol 2020; 11:33. [PMID: 32308978 PMCID: PMC7146966 DOI: 10.1186/s40104-020-00439-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Accepted: 02/18/2020] [Indexed: 12/17/2022] Open
Abstract
Background Spermatogonial stem cells (SSCs) are capable of both self-renewal and differentiation to mature functional spermatozoa, being the only adult stem cells in the males that can transmit genetic information to the next generation. Porcine SSCs hold great value in transgenic pig production and in establishment of porcine models for regenerative medicine. However, studies and applications of porcine SSCs have been greatly hampered by the low number of SSCs in the testis as well as the lack of an ideal stable long-term culture system to propagate porcine SSCs perpetually. Results In the present study, by lentiviral transduction of plasmids expressing the simian virus 40 (SV40) large T antigen into porcine primary SSCs, we developed two immortalized cell lines with porcine SSC attributes. The established cell lines, with the expression of porcine SSC and germ cell markers UCHL1, PLZF, THY1, VASA and DAZL, could respond to retinoic acid (RA), and could colonize the recipient mouse testis without tumor formation after transplantation. The cell lines displayed infinite proliferation potential, and have now been cultured for more than 7 months and passaged for over 35 times without morphological abnormalities. Conclusions We have for the first time established porcine SSC lines that could provide abundant cell sources for mechanistic studies on porcine SSC self-renewal and differentiation, thereby facilitating development of an optimal long-term culture system for porcine primary SSCs and their application to animal husbandry and medicine.
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Affiliation(s)
- Yi Zheng
- Key Laboratory for Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling, 712100 Shaanxi China
| | - Tongying Feng
- Key Laboratory for Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling, 712100 Shaanxi China
| | - Pengfei Zhang
- Key Laboratory for Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling, 712100 Shaanxi China
| | - Peipei Lei
- Key Laboratory for Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling, 712100 Shaanxi China
| | - Fuyuan Li
- Key Laboratory for Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling, 712100 Shaanxi China
| | - Wenxian Zeng
- Key Laboratory for Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling, 712100 Shaanxi China
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Schmid N, Flenkenthaler F, Stöckl JB, Dietrich KG, Köhn FM, Schwarzer JU, Kunz L, Luckner M, Wanner G, Arnold GJ, Fröhlich T, Mayerhofer A. Insights into replicative senescence of human testicular peritubular cells. Sci Rep 2019; 9:15052. [PMID: 31636313 PMCID: PMC6803627 DOI: 10.1038/s41598-019-51380-w] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Accepted: 09/27/2019] [Indexed: 01/10/2023] Open
Abstract
There is evidence for an age-related decline in male reproductive functions, yet how the human testis may age is not understood. Human testicular peritubular cells (HTPCs) transport sperm, contribute to the spermatogonial stem cell (SSC) niche and immune surveillance, and can be isolated and studied in vitro. Consequences of replicative senescence of HTPCs were evaluated to gain partial insights into human testicular aging. To this end, early and advanced HTPC passages, in which replicative senescence was indicated by increased cell size, altered nuclear morphology, enhanced β-galactosidase activity, telomere attrition and reduced mitochondrial DNA (mtDNA), were compared. These alterations are typical for senescent cells, in general. To examine HTPC-specific changes, focused ion beam scanning electron microscopy (FIB/SEM) tomography was employed, which revealed a reduced mitochondrial network and an increased lysosome population. The results coincide with the data of a parallel proteomic analysis and indicate deranged proteostasis. The mRNA levels of typical contractility markers and growth factors, important for the SSC niche, were not significantly altered. A secretome analysis identified, however, elevated levels of macrophage migration inhibitory factor (MIF) and dipeptidyl peptidase 4 (DPP4), which may play a role in spermatogenesis. Testicular DPP4 may further represent a possible drug target.
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Affiliation(s)
- Nina Schmid
- LMU München, Biomedical Center (BMC), Anatomy III - Cell Biology, 82152, Planegg-Martinsried, Germany
| | - Florian Flenkenthaler
- LMU München, Gene Center, Laboratory for Functional Genome Analysis (LAFUGA), 81377 München, Germany
| | - Jan B Stöckl
- LMU München, Gene Center, Laboratory for Functional Genome Analysis (LAFUGA), 81377 München, Germany
| | - Kim-Gwendolyn Dietrich
- LMU München, Biomedical Center (BMC), Anatomy III - Cell Biology, 82152, Planegg-Martinsried, Germany
| | | | | | - Lars Kunz
- LMU München, Department Biology II, Division of Neurobiology, 82152, Planegg-Martinsried, Germany
| | - Manja Luckner
- LMU München, Department Biology I, Ultrastructural Research, 82152, Planegg-Martinsried, Germany
| | - Gerhard Wanner
- LMU München, Department Biology I, Ultrastructural Research, 82152, Planegg-Martinsried, Germany
| | - Georg J Arnold
- LMU München, Gene Center, Laboratory for Functional Genome Analysis (LAFUGA), 81377 München, Germany
| | - Thomas Fröhlich
- LMU München, Gene Center, Laboratory for Functional Genome Analysis (LAFUGA), 81377 München, Germany
| | - Artur Mayerhofer
- LMU München, Biomedical Center (BMC), Anatomy III - Cell Biology, 82152, Planegg-Martinsried, Germany.
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Wang G, Li Y, Yang Q, Xu S, Ma S, Yan R, Zhang R, Jia G, Ai D, Yang Q. Gene expression dynamics during the gonocyte to spermatogonia transition and spermatogenesis in the domestic yak. J Anim Sci Biotechnol 2019; 10:64. [PMID: 31338188 PMCID: PMC6624888 DOI: 10.1186/s40104-019-0360-7] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2018] [Accepted: 05/01/2019] [Indexed: 11/10/2022] Open
Abstract
Background Spermatogenesis is a cellular differentiation process that includes three major events: mitosis of spermatogonia, meiosis of spermatocytes and spermiogenesis. Steady-state spermatogenesis relies on functions of spermatogonial stem cells (SSCs). Establishing and maintaining a foundational SSC pool is essential for continued spermatogenesis in mammals. Currently, our knowledge about SSC and spermatogenesis is severely limited in domestic animals. Results In the present study, we examined transcriptomes of testes from domestic yaks at four different stages (3, 5, 8 and 24 months of age) and attempted to identify genes that are associated with key developmental events of spermatogenesis. Histological analyses showed that the most advanced germ cells within seminiferous tubules of testes from 3, 5, 8 and 24 months old yaks were gonocytes, spermatogonia, spermatocytes and elongated spermatids, respectively. RNA-sequencing (RNA-seq) analyses revealed that 11904, 4381 and 2459 genes were differentially expressed during the gonocyte to spermatogonia transition, the mitosis to meiosis transition and the meiosis to post-meiosis transition. Further analyses identified a list of candidate genes than may regulate these important cellular processes. CXCR4, a previously identified SSC niche factor in mouse, was one of the up-regulated genes in the 5 months old yak testis. Results of immunohistochemical staining confirmed that CXCR4 was exclusively expressed in gonocytes and a subpopulation of spermatogonia in the yak testis. Conclusions Together, these findings demonstrated histological changes of postnatal testis development in the domestic yak. During development of spermatogonial lineage, meiotic and haploid germ cells are supported by dynamic transcriptional regulation of gene expression. Our transcriptomic analyses provided a list of candidate genes that potentially play crucial roles in directing the establishment of SSC and spermatogenesis in yak. Electronic supplementary material The online version of this article (10.1186/s40104-019-0360-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Guowen Wang
- 1Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, 810000 Qinghai China.,2University of Chinese Academy of Sciences, Beijing, 100049 China
| | - Yongchang Li
- 1Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, 810000 Qinghai China.,2University of Chinese Academy of Sciences, Beijing, 100049 China
| | - Qilin Yang
- 3Department of Veterinary Sciences, Qinghai Vocational and Technical Institute of Animal Husbandry and Veterinary, Qinghai University, Xining, 810016 China
| | - Shangrong Xu
- 4Qinghai Academy of Animal Science and Veterinary Medicine, Qinghai University, Xining, 810016 China
| | - Shike Ma
- 4Qinghai Academy of Animal Science and Veterinary Medicine, Qinghai University, Xining, 810016 China
| | - Rongge Yan
- 1Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, 810000 Qinghai China.,2University of Chinese Academy of Sciences, Beijing, 100049 China
| | - Ruina Zhang
- 1Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, 810000 Qinghai China
| | - Gongxue Jia
- 1Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, 810000 Qinghai China
| | - Deqiang Ai
- Animal Husbandry Technology Extension Station of Qinghai Province, Xining, 810001 Qinghai China
| | - Qi'en Yang
- 1Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, 810000 Qinghai China.,6Qinghai Key Laboratory of Animal Ecological Genomics, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, 810001 Qinghai China.,7CAS Center for Excellence in Tibetan Plateau Earth Sciences, Chinese Academy of Sciences, Beijing, 100101 China
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Mayerhofer A. Peritubular cells of the human testis: prostaglandin E 2 and more. Andrology 2019; 8:898-902. [PMID: 31237067 DOI: 10.1111/andr.12669] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Revised: 05/21/2019] [Accepted: 05/23/2019] [Indexed: 01/08/2023]
Abstract
BACKGROUND Several layers of slender, smooth muscle-like, peritubular cells and extracellular matrix (ECM) form the peritubular compartment of the human testis. Peritubular cells are the least explored testicular cells. MATERIALS AND METHODS Human testicular peritubular cells (HTPCs) can be isolated from small testicular fragments of patients and studied in vitro. We have used this cellular model, in combination with human testicular samples, to examine how peritubular cells may contribute to male (in)fertility. RESULTS Human testicular peritubular cells (HTPCs) retain contractile abilities in vitro and secrete many proteins. Among them are factors, which serve intra-testicular roles, for example, glial cell line-derived neurotrophic factor (GDNF), thought to be important for the renewal of spermatogonial stem cells (SSCs). Studies in mutant mice indicated that peritubular cell-derived GDNF is crucial for lifelong spermatogenesis. Thus, peritubular cells are a functional part of the SSC niche. Peritubular cells of mice and men express androgen receptors (AR). In mouse peritubular cells, androgens enhanced GDNF production, but not in HTPCs. Rather, AR activation increased the levels of AR and smooth muscle proteins and thereby enhanced the smooth muscle-like phenotype. Following the lead of a proteomic analysis, which identified the key prostaglandin (PG)-synthesizing enzyme (PTGS1 = COX1), we found that HTPCs secrete PGE2 . COX1, and PGE2 receptors (EP1, 2, and 4) were identified in peritubular cells in situ, supporting in vivo relevance. In HTPCs, activation of EP1/4 increased GDNF and a smooth muscle protein. Ibuprofen is a nonsteroidal anti-inflammatory drug (NSAID), which blocks PG synthesis. Added to HTPCs it reduced PGE2 and GDNF production and lowered smooth muscle protein levels. If applicable to the in vivo situation, the results suggest that ibuprofen and possibly other NSAIDs may impair important peritubular cell functions and consequently testicular functions. CONCLUSION The few examples highlighted, together with others not mentioned here, indicate that HTPCs provide an experimental window into the human testis.
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Affiliation(s)
- Artur Mayerhofer
- Biomedical Center Munich (BMC), Cell Biology - Anatomy III, Ludwig-Maximilians-Universität (LMU), Planegg-Martinsried, Germany
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Sharma S, Wistuba J, Pock T, Schlatt S, Neuhaus N. Spermatogonial stem cells: updates from specification to clinical relevance. Hum Reprod Update 2019; 25:275-297. [DOI: 10.1093/humupd/dmz006] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Revised: 11/23/2018] [Accepted: 02/22/2019] [Indexed: 12/20/2022] Open
Affiliation(s)
- Swati Sharma
- Centre of Reproductive Medicine and Andrology, Institute of Reproductive and Regenerative Biology, Albert-Schweitzer Campus 1, Building D11, Münster, Germany
| | - Joachim Wistuba
- Centre of Reproductive Medicine and Andrology, Institute of Reproductive and Regenerative Biology, Albert-Schweitzer Campus 1, Building D11, Münster, Germany
| | - Tim Pock
- Centre of Reproductive Medicine and Andrology, Institute of Reproductive and Regenerative Biology, Albert-Schweitzer Campus 1, Building D11, Münster, Germany
| | - Stefan Schlatt
- Centre of Reproductive Medicine and Andrology, Institute of Reproductive and Regenerative Biology, Albert-Schweitzer Campus 1, Building D11, Münster, Germany
| | - Nina Neuhaus
- Centre of Reproductive Medicine and Andrology, Institute of Reproductive and Regenerative Biology, Albert-Schweitzer Campus 1, Building D11, Münster, Germany
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