Retinoic acid and meiosis induction in adult versus embryonic gonads of medaka
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- In vertebrates, one of the first recognizable sex differences in embryos is the onset of meiosis, known to be regulated by retinoic acid (RA) in mammals. We investigated in medaka a possible meiotic function of RA during the embryonic sex determination (SD) period and in mature gonads. We found RA mediated transcriptional activation in germ cells of both sexes much earlier than the SD stage, however, no such activity during the critical stages of SD. In adults, expression of the RA metabolizing enzymes indicates sexually dimorphic RA levels. InIn vertebrates, one of the first recognizable sex differences in embryos is the onset of meiosis, known to be regulated by retinoic acid (RA) in mammals. We investigated in medaka a possible meiotic function of RA during the embryonic sex determination (SD) period and in mature gonads. We found RA mediated transcriptional activation in germ cells of both sexes much earlier than the SD stage, however, no such activity during the critical stages of SD. In adults, expression of the RA metabolizing enzymes indicates sexually dimorphic RA levels. In testis, RA acts directly in Sertoli, Leydig and pre-meiotic germ cells. In ovaries, RA transcriptional activity is highest in meiotic oocytes. Our results show that RA plays an important role in meiosis induction and gametogenesis in adult medaka but contrary to common expectations, not for initiating the first meiosis in female germ cells at the SD stage.…
Autor(en): | Mateus C. Adolfi, Amaury Herpin, Martina Regensburger, Jacopo Sacquegno, Joshua S. Waxman, Manfred Schartl |
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URN: | urn:nbn:de:bvb:20-opus-147843 |
Dokumentart: | Artikel / Aufsatz in einer Zeitschrift |
Institute der Universität: | Fakultät für Biologie / Theodor-Boveri-Institut für Biowissenschaften |
Sprache der Veröffentlichung: | Englisch |
Titel des übergeordneten Werkes / der Zeitschrift (Englisch): | Scientific Reports |
Erscheinungsjahr: | 2016 |
Band / Jahrgang: | 6 |
Seitenangabe: | 34281 |
Originalveröffentlichung / Quelle: | Scientific Reports 6, 34281; doi: 10.1038/srep34281 (2016) |
DOI: | https://doi.org/10.1038/srep34281 |
Allgemeine fachliche Zuordnung (DDC-Klassifikation): | 5 Naturwissenschaften und Mathematik / 57 Biowissenschaften; Biologie / 576 Genetik und Evolution |
Freie Schlagwort(e): | developmental biology; molecular biology |
Datum der Freischaltung: | 07.06.2017 |
Sammlungen: | Open-Access-Publikationsfonds / Förderzeitraum 2016 |
Lizenz (Deutsch): | CC BY: Creative-Commons-Lizenz: Namensnennung |