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Human NANOS1 Represses Apoptosis by Downregulating Pro-Apoptotic Genes in the Male Germ Cell Line

1
Institute of Human Genetics, Polish Academy of Sciences, Strzeszynska 32, 60-479 Poznan, Poland
2
Institute of Bioorganic Chemistry, Polish Academy of Sciences, Noskowskiego 12/14, 61-704 Poznan, Poland
3
Department of Developmental, Molecular and Chemical Biology, Tufts University Medical School, 136 Harrison Ave, Boston, MA 02111, USA
4
Department of Histology and Embryology, Poznan University of Medical Sciences, Swiecickiego 6, 60-781 Poznan, Poland
5
Department of Clinical Pathology, Poznan University of Medical Sciences, Przybyszewskiego 49, 60-355 Poznan, Poland
*
Authors to whom correspondence should be addressed.
These authors contributed equally to this work.
Int. J. Mol. Sci. 2020, 21(8), 3009; https://doi.org/10.3390/ijms21083009
Received: 28 February 2020 / Revised: 17 April 2020 / Accepted: 22 April 2020 / Published: 24 April 2020
While two mouse NANOS paralogues, NANOS2 and NANOS3, are crucial for maintenance of germ cells by suppression of apoptosis, the mouse NANOS1 paralogue does not seem to regulate these processes. Previously, we described a human NANOS1 p.[(Pro34Thr);(Ser83del)] mutation associated with the absence of germ cells in seminiferous tubules of infertile patients, which might suggest an anti-apoptotic role of human NANOS1. In this study, we aimed to determine a potential influence of human NANOS1 on the maintenance of TCam-2 model germ cells by investigating proliferation, cell cycle, and apoptosis. Constructs encoding wild-type or mutated human NANOS1 were used for transfection of TCam-2 cells, in order to investigate the effect of NANOS1 on cell proliferation, which was studied using a colorimetric assay, as well as apoptosis and the cell cycle, which were measured by flow cytometry. RNA-Seq (RNA sequencing) analysis followed by RT-qPCR (reverse transcription and quantitative polymerase chain reaction) was conducted for identifying pro-apoptotic genes repressed by NANOS1. Here, we show that overexpression of NANOS1 downregulates apoptosis in TCam-2 cells. Moreover, we found that NANOS1 represses a set of pro-apoptotic genes at the mRNA level. We also found that the infertility-associated p.[(Pro34Thr);(Ser83del)] mutation causes NANOS1 to functionally switch from being anti-apoptotic to pro-apoptotic in the human male germ cell line. Thus, this report is the first to show an anti-apoptotic role of NANOS1 exerted by negative regulation of mRNAs of pro-apoptotic genes. View Full-Text
Keywords: NANOS1; apoptosis; cell cycle; human infertility; NANOS1 mutation NANOS1; apoptosis; cell cycle; human infertility; NANOS1 mutation
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Janecki, D.M.; Ilaslan, E.; Smialek, M.J.; Sajek, M.P.; Kotecki, M.; Ginter-Matuszewska, B.; Krainski, P.; Jaruzelska, J.; Kusz-Zamelczyk, K. Human NANOS1 Represses Apoptosis by Downregulating Pro-Apoptotic Genes in the Male Germ Cell Line. Int. J. Mol. Sci. 2020, 21, 3009.

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