Abstract
Meiotic entry is one of the earliest sex determination events of the germ cell in higher vertebrates. Although advances in meiosis onset have been achieved in mammals, birds and fish, how this process functions in reptiles is largely unknown. In this study, we present the molecular analysis of meiosis onset and the role of retinoic acid (RA) in this process in the red-eared slider turtle. Our results using Stra8 as a pre-meiosis indicator show that in the female embryonic gonad, meiosis commitment starts around stage 19. Additionally, signals of the meiosis marker Sycp3 could be detected at stage 19 and become highly expressed by stage 23. No expression of these genes was detected in male embryonic gonads, suggesting the entry into meiosis prophase I was restricted to female embryonic germ cells. Notably, RA activity in fetal gonads is likely to be elevated in females than that in males, as evidenced by the higher expression of RA synthase Aldh1a1 and lower expression of RA-degrading enzyme Cyp26a1 in female gonads prior to meiotic entry. In addition, exogenous RA treatment induced the expression of Stra8 and Sycp3 in both sexes, whether in vivo or in vitro. Together, these results indicate that high levels of RA in the embryonic female gonads can lead to the initiation of meiosis in the turtle.
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References
Adolfi MC, Herpin A, Regensburger M, Sacquegno J, Waxman JS, Schartl M (2016) Retinoic acid and meiosis induction in adult versus embryonic gonads of medaka. Sci Rep 6:34281
Anderson EL, Baltus AE, Roepers-Gajadien HL, Hassold TJ, de Rooij DG, van Pelt AM, Page DC (2008) Stra8 and its inducer, retinoic acid, regulate meiotic initiation in both spermatogenesis and oogenesis in mice. Proc Natl Acad Sci U S A 105:14976–14980
Balmer JE, Blomhoff R (2002) Gene expression regulation by retinoic acid. J Lipid Res 43:1773–1808
Bowles J, Knight D, Smith C, Wilhelm D, Richman J, Mamiya S, Yashiro K, Chawengsaksophak K, Wilson MJ, Rossant J, Hamada H, Koopman P (2006) Retinoid signaling determines germ cell fate in mice. Science 312:596–600
Byskov AG (1986) Differentiation of mammalian embryonic gonad. Physiol Rev 66:71–117
Chen Q, Sato K, Yokoi H, Suzuki T (2020) Developmental regulatory system of ocular-side-specific asymmetric pigmentation in flounder: Critical role of retinoic acid signaling. J Exp Zool B Mol Dev Evol 334:156–167
Cunningham TJ, Duester G (2015) Mechanisms of retinoic acid signalling and its roles in organ and limb development. Nat Rev Mol Cell Biol 16:110–123
Feng CW, Burnet G, Spiller CM, Cheung FKM, Chawengsaksophak K, Koopman P, Bowles J (2021) Identification of regulatory elements required for Stra8 expression in fetal ovarian germ cells of the mouse. Development 148:dev194977
Ge C, Ye J, Weber C, Sun W, Zhang H, Zhou Y, Cai C, Qian G, Capel B (2018) The histone demethylase KDM6B regulates temperature-dependent sex determination in a turtle species. Science 360:645–648
Greenbaum E, Carr JL (2002) Staging criteria for embryos of the spiny softshell turtle, Apalone spinifera (testudines: Trionychidae). J Morphol 254:272–291
Griswold MD, Hogarth CA, Bowles J, Koopman P (2012) Initiating meiosis: the case for retinoic acid. Biol Reprod 86:35
Ishiguro KI, Matsuura K, Tani N, Takeda N, Usuki S, Yamane M, Sugimoto M, Fujimura S, Hosokawa M, Chuma S, Ko MSH, Araki K, Niwa H (2020) MEIOSIN directs the switch from mitosis to meiosis in mammalian germ cells. Dev Cell 52:429–445
Koubova J, Hu YC, Bhattacharyya T, Soh YQ, Gill ME, Goodheart ML, Hogarth CA, Griswold MD, Page DC (2014) Retinoic acid activates two pathways required for meiosis in mice. PLoS Genet 10:e1004541
Koubova J, Menke DB, Zhou Q, Capel B, Griswold MD, Page DC (2006) Retinoic acid regulates sex-specific timing of meiotic initiation in mice. Proc Natl Acad Sci USA 103:2474–2479
Li M, Feng R, Ma H, Dong R, Liu Z, Jiang W, Tao W, Wang D (2016) Retinoic acid triggers meiosis initiation via stra8-dependent pathway in Southern catfish, Silurus meridionalis. Gen Comp Endocrinol 232:191–198
MacLean G, Li H, Metzger D, Chambon P, Petkovich M (2007) Apoptotic extinction of germ cells in testes of Cyp26b1 knockout mice. Endocrinology 148:4560–4567
Menke DB, Koubova J, Page DC (2003) Sexual differentiation of germ cells in XX mouse gonads occurs in an anterior-to-posterior wave. Dev Biol 262:303–312
Niederreither K, Dolle P (2008) Retinoic acid in development: towards an integrated view. Nat Rev Genet 9:541–553
Rhinn M, Dolle P (2012) Retinoic Acid Signalling during development. Development 139:843–858
Rosselot C, Spraggon L, Chia I, Batourina E, Riccio P, Lu B, Niederreither K, Dolle P, Duester G, Chambon P, Costantini F, Gilbert T, Molotkov A, Mendelsohn C (2010) Non-cell-autonomous retinoid signaling is crucial for renal development. Development 137:283–292
Smith CA, Roeszler KN, Bowles J, Koopman P, Sinclair AH (2008) Onset of meiosis in the chicken embryo; evidence of a role for retinoic acid. BMC Dev Biol 8:85
Sou IF, Pryce RM, Tee WW, McClurg UL (2021) Meiosis initiation: a story of two sexes in all creatures great and small. Biochem J 478:3791–3805
Thisse C, Thisse B (2008) High-resolution in situ hybridization to whole-mount zebrafish embryos. Nat Protoc 3:59–69
Wallacides A, Chesnel A, Chardard D, Flament S, Dumond H (2009) Evidence for a conserved role of retinoic acid in urodele amphibian meiosis onset. Dev Dyn 238:1389–1398
Wang S, Wang X, Ma L, Lin X, Zhang D, Li Z, Wu Y, Zheng C, Feng X, Liao S, Feng Y, Chen J, Hu X, Wang M, Han C (2016) Retinoic acid is sufficient for the in vitro induction of mouse spermatocytes. Stem Cell Reports 7:80–94
Weber C, Zhou Y, Lee JG, Looger LL, Qian G, Ge C, Capel B (2020) Temperature-dependent sex determination is mediated by pSTAT3 repression of Kdm6b. Science 368:303–306
Wibbels T, Bull JJ, Crews D (1991) Chronology and morphology of temperature-dependent sex determination. J Exp Zool 260:371–381
Wilkins AS, Holliday R (2009) The evolution of meiosis from mitosis. Genetics 181:3–12
Yu M, Yu P, Leghari IH, Ge C, Mi Y, Zhang C (2013) RALDH2, the enzyme for retinoic acid synthesis, mediates meiosis initiation in germ cells of the female embryonic chickens. Amino Acids 44:405–412
Zhou Q, Nie R, Li Y, Friel P, Mitchell D, Hess RA, Small C, Griswold MD (2008) Expression of stimulated by retinoic acid gene 8 (Stra8) in spermatogenic cells induced by retinoic acid: an in vivo study in vitamin A-sufficient postnatal murine testes. Biol Reprod 79:35–42
Zolfaghari R, Mattie FJ, Wei C-H, Chisholm DR, Whiting A, Ross AC (2019) CYP26A1 gene promoter is a useful tool for reporting RAR-mediated retinoid activity. Anal Biochem 577:98–109
Acknowledgements
We thank to members of Ge laboratory for their support.
Funding
This work was supported by National Natural Science Foundation of China [31922084, 31872960, U22A20529], Natural Science Foundation of Zhejiang Province for Distinguished Young Scholars [LR19C190001] to C.G. China Postdoctoral Science Foundation [2022M722982], Ningbo Natural Science Foundation [2022J192] and the Zhejiang Provincial Top Key Discipline of Biological Engineering [1741000592] to Q.C. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
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Conceptualization: Q.C., C.G.; methodology: Q.C., C.G.; formal analysis: K.W., Q.C., C.G.; investigation: K.W., Q.C., F.L., J.S., W.S., C.G; resources: C.G.; data curation: Q.C., C.G.; writing—original draft: K.W., Q.C.; writing—review and editing: Q.C., F.L., W.S., C.G.; visualization: K.W., Q.C., W.S., J.S.; supervision: C.G.; project administration: Q.C., C.G.; funding acquisition: Q.C., C.G.
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Wu, K., Chen, Q., Li, F. et al. Evidence for RA-dependent meiosis onset in a turtle embryo. Cell Tissue Res 394, 229–241 (2023). https://doi.org/10.1007/s00441-023-03814-1
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DOI: https://doi.org/10.1007/s00441-023-03814-1