Sox9 in a teleost fish, medaka (Oryzias latipes): Evidence for diversified function of Sox9 in gonad differentiation

Hayato Yokoi, Tohru Kobayashi, Minoru Tanaka, Yoshitaka Nagahama, Yuko Wakamatsu, Hiroyuki Takeda, Kazuo Araki, Ken Ichirou Morohashi, Kenjiro Ozato

Research output: Contribution to journalArticle

72 Citations (Scopus)

Abstract

Sox9 is a transcription factor containing the Sry-related high-mobility-group (HMG) box. Mutations in human SOX9 gene cause skeletal defects and male-to-female sex reversal, indicating its essential roles in chondrogenesis and testis development. Comparative studies have shown that Sox9 is expressed in chondrogenic tissues and testis in other vertebrates. Therefore, it was suggested that roles of Sox9 in cartilage and male gonad development are conserved among vertebrates. To investigate the evolutional significance of Sox9 in the gonad and cartilage development of teleost fish, we isolated medaka sox9 and analyzed its expression. Two kinds of transcripts (sox9 and sox91f) were isolated by cDNA library screening. The sox9 encoded 487 amino acids and showed approximately 70% amino acid identity with known vertebrate SOX9 proteins. The sox91f was a longer form of the sox9, which was transcribed from an additional exon in the 5′ upstream region. Interestingly, the expression of medaka sox9 was predominantly observed in the adult ovary by northern blot and in situ hybridization analyses, whereas in the testis, its expression was detectable only by RT-PCR. During medaka embryogenesis, its expression was observed in the cranial cartilage and pectoral fin endoskeleton. These observations suggest that the function of Sox9 in the cartilage is conserved among vertebrates, while that in the gonad is quite different in medaka.

Original languageEnglish
Pages (from-to)5-16
Number of pages12
JournalMolecular Reproduction and Development
Volume63
Issue number1
DOIs
Publication statusPublished - Aug 12 2002
Externally publishedYes

Fingerprint

Oryzias
Gonads
Cartilage
Vertebrates
Fishes
Testis
Chondrogenesis
Amino Acids
Gene Library
Northern Blotting
Embryonic Development
In Situ Hybridization
Ovary
Exons
Transcription Factors
Polymerase Chain Reaction
Mutation
Genes
Proteins

All Science Journal Classification (ASJC) codes

  • Genetics
  • Developmental Biology
  • Cell Biology

Cite this

Sox9 in a teleost fish, medaka (Oryzias latipes) : Evidence for diversified function of Sox9 in gonad differentiation. / Yokoi, Hayato; Kobayashi, Tohru; Tanaka, Minoru; Nagahama, Yoshitaka; Wakamatsu, Yuko; Takeda, Hiroyuki; Araki, Kazuo; Morohashi, Ken Ichirou; Ozato, Kenjiro.

In: Molecular Reproduction and Development, Vol. 63, No. 1, 12.08.2002, p. 5-16.

Research output: Contribution to journalArticle

Yokoi, Hayato ; Kobayashi, Tohru ; Tanaka, Minoru ; Nagahama, Yoshitaka ; Wakamatsu, Yuko ; Takeda, Hiroyuki ; Araki, Kazuo ; Morohashi, Ken Ichirou ; Ozato, Kenjiro. / Sox9 in a teleost fish, medaka (Oryzias latipes) : Evidence for diversified function of Sox9 in gonad differentiation. In: Molecular Reproduction and Development. 2002 ; Vol. 63, No. 1. pp. 5-16.
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