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Two Figla homologues have disparate functions during sex differentiation in half-smooth tongue sole (Cynoglossus semilaevis)
Li, H.; Xu, W.; Zhang, N.; Shao, C.; Zhu, Y.; Dong, Z.; Wang, N.; Jia, X.; Xu, H.; Chen, S. (2016). Two Figla homologues have disparate functions during sex differentiation in half-smooth tongue sole (Cynoglossus semilaevis). NPG Scientific Reports 6(28219): 10 pp. http://hdl.handle.net/10.1038/srep28219
In: Scientific Reports (Nature Publishing Group). Nature Publishing Group: London. ISSN 2045-2322, more
Peer reviewed article  

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Keywords
    Cynoglossus semilaevis Günther, 1873 [WoRMS]; Marine

Authors  Top 
  • Li, H.
  • Xu, W.
  • Zhang, N.
  • Shao, C.
  • Zhu, Y.
  • Dong, Z.
  • Wang, N.
  • Jia, X.
  • Xu, H.
  • Chen, S.

Abstract
    Figla is a germ-cell-specific transcription factor associated with ovary development and differentiation. In vertebrates, one transcriptional form of Figla is commonly found. However, besides the common form of this gene (named Figla_tv1), a new transcriptional form (named Figla_tv2) was identified in half-smooth tongue sole (Cynoglossus semilaevis). The full-length cDNA of Figla_tv1 was 1057 bp long with a 591-bp open reading frame encoding a predicted 196 amino acid protein, while Figla_tv2 encoded a 125 amino acid protein. Figla_tv1 and Figla_tv2 expression in various tissues was detected by qRT-PCR. Figla_tv1 was expressed mainly in ovary, skin and liver, while Figla_tv2 was expressed in all examined tissues. In the gonads, Figla_tv1 was expressed in ovary, while Figla_tv2 was predominately expressed in testis of pseudomales. Further, in situ hybridization located Figla_tv1 only in oocytes and Figla_tv2 mainly in germ cells of pseudomale testis. After knocking down Figla_tv2 in a pseudomale testis cell line, the expression of two steroid hormone-encoding genes, StAR and P450scc, was significantly upregulated (P < 0.05). Our findings suggest that Figla_tv1 has a conserved function in folliculogenesis, as in other vertebrates, and that Figla_tv2 may have a role in the spermatogenesis of pseudomales by regulating the synthesis and metabolism of steroid hormones.

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