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Antagonists to the Wnt Cascade Exhibit Sex-Specific Expression in Gonads of Sexually Mature Shovelnose Sturgeon
Open accessAbstract
Little is known regarding molecular mechanisms involved in sex determination and differentiation in sturgeon species. We addressed this knowledge gap by using next generation pyrosequencing technology to provide transcript libraries and species-specific sequences for mature gonads of shovelnose sturgeon, Scaphirhynchus platorynchus. We then mined these libraries to identify gender-specific transcripts and quantified relative transcript abundance using quantitative real-time polymerase chain reaction (qPCR). We detected a limited number of genes known to play a role in sex differentiation in other species. The sequence for dmrt1 was found only in the testes library. The abundance of dmrt1 differed slightly between the sexes, but the melt curve suggests that there may be different isoforms of dmrt1 in ovaries and testes of shovelnose sturgeon. The transcription factor foxl2 was 5.3-fold greater in ovaries than in testes. Two antagonists to the Wnt cascade, dickkopf-1 (dkk1) and dapper-1 (dact1), were found only in the ovary library. Results from qPCR indicated that dkk1 and dact1 were upregulated 1,819.1- and 207.5-fold, respectively, in ovaries compared with testes. These results suggest that antagonists to the Wnt cascade may play significant roles in sex differentiation and gonadal development in sturgeon and could serve as sex markers in this group of ancient fish.
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Metadata
- Authors
- Amberg, J. J., Goforth, R. R., & Sepúlveda, M. S.
- Venue
- Sexual Development
- Publisher
- S. Karger AG
- Published
- 2013
- Volume
- 7
- Issue
- 6
- Pages
- 308-315
- ISSN
- 1661-5425 (ISSN-L)
- 1661-5433
- OpenAlex
- W1971546287
- Cited by
- 477
- References
- 15
- FWCI
- 28.73
- Type
- journal article
- Language
- en
- Open access
- bronze
- Licence
- karger.com/pages/terms-and-conditions (vor)
- karger.com/pages/terms-and-conditions (tdm)
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