PMID- 30986927 OWN - NLM STAT- MEDLINE DCOM- 20190730 LR - 20211204 IS - 1422-0067 (Electronic) IS - 1422-0067 (Linking) VI - 20 IP - 7 DP - 2019 Apr 2 TI - Molecular Mechanisms Controlled by mTOR in Male Reproductive System. LID - 10.3390/ijms20071633 [doi] LID - 1633 AB - In recent years, the mammalian target of rapamycin (mTOR) has emerged as a master integrator of upstream inputs, such as amino acids, growth factors and insulin availability, energy status and many others. The integration of these signals promotes a response through several downstream effectors that regulate protein synthesis, glucose metabolism and cytoskeleton organization, among others. All these biological processes are essential for male fertility, thus it is not surprising that novel molecular mechanisms controlled by mTOR in the male reproductive tract have been described. Indeed, since the first clinical evidence showed that men taking rapamycin were infertile, several studies have evidenced distinct roles for mTOR in spermatogenesis. However, there is a lack of consensus whether mTOR inhibition, which remains the experimental approach that originates the majority of available data, has a negative or positive impact on male reproductive health. Herein we discuss the latest findings concerning mTOR activity in testes, particularly its role on spermatogonial stem cell (SSC) maintenance and differentiation, as well as in the physiology of Sertoli cells (SCs), responsible for blood-testis barrier maintenance/restructuring and the nutritional support of spermatogenesis. Taken together, these recent advances highlight a crucial role for mTOR in determining the male reproductive potential. FAU - Moreira, Bruno P AU - Moreira BP AUID- ORCID: 0000-0002-8584-4979 AD - Department of Microscopy, Laboratory of Cell Biology, Institute of Biomedical Sciences Abel Salazar (ICBAS) and Unit for Multidisciplinary Research in Biomedicine (UMIB), University of Porto, 4050-313 Porto, Portugal. brunommoreira9@gmail.com. FAU - Oliveira, Pedro F AU - Oliveira PF AUID- ORCID: 0000-0002-4989-5699 AD - Department of Microscopy, Laboratory of Cell Biology, Institute of Biomedical Sciences Abel Salazar (ICBAS) and Unit for Multidisciplinary Research in Biomedicine (UMIB), University of Porto, 4050-313 Porto, Portugal. pfobox@gmail.com. AD - i3S-Instituto de Investigacao e Inovacao em Saude, University of Porto, 4200-135 Porto, Portugal. pfobox@gmail.com. AD - Department of Genetics, Faculty of Medicine, University of Porto, 4200-450 Porto, Portugal. pfobox@gmail.com. FAU - Alves, Marco G AU - Alves MG AUID- ORCID: 0000-0001-7635-783X AD - Department of Microscopy, Laboratory of Cell Biology, Institute of Biomedical Sciences Abel Salazar (ICBAS) and Unit for Multidisciplinary Research in Biomedicine (UMIB), University of Porto, 4050-313 Porto, Portugal. alvesmarc@gmail.com. LA - eng GR - IFCT2015; PTDC/BIM-MET/4712/2014; PTDC/BBB-BQB/1368/2014; PTDC/MEC-AND/28691/2017/Fundacao para a Ciencia e a Tecnologia/ PT - Journal Article PT - Review DEP - 20190402 PL - Switzerland TA - Int J Mol Sci JT - International journal of molecular sciences JID - 101092791 RN - EC 2.7.11.1 (TOR Serine-Threonine Kinases) MH - Animals MH - Genitalia, Male/*metabolism MH - Humans MH - Male MH - Models, Biological MH - Signal Transduction MH - TOR Serine-Threonine Kinases/*metabolism MH - Testis/metabolism PMC - PMC6480367 OTO - NOTNLM OT - Sertoli cells OT - mTOR OT - male fertility OT - spermatogenesis COIS- The authors declare no conflict of interest. The funders had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript, or in the decision to publish the results. EDAT- 2019/04/17 06:00 MHDA- 2019/07/31 06:00 PMCR- 2019/04/01 CRDT- 2019/04/17 06:00 PHST- 2019/03/12 00:00 [received] PHST- 2019/03/27 00:00 [revised] PHST- 2019/03/28 00:00 [accepted] PHST- 2019/04/17 06:00 [entrez] PHST- 2019/04/17 06:00 [pubmed] PHST- 2019/07/31 06:00 [medline] PHST- 2019/04/01 00:00 [pmc-release] AID - ijms20071633 [pii] AID - ijms-20-01633 [pii] AID - 10.3390/ijms20071633 [doi] PST - epublish SO - Int J Mol Sci. 2019 Apr 2;20(7):1633. doi: 10.3390/ijms20071633.