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. 2004 Jul;5(5):403–418. doi: 10.1002/cfg.418

Comparative Analysis of the Testis and Ovary Transcriptomes in Zebrafish by Combining Experimental and Computational Tools

Yang Li 1, Jer Ming Chia 2,3, Richard Bartfai 1,4, Alan Christoffels 3, Gen Hua Yue 1, Ke Ding 1, Mei Yin Ho 1, James A Hill 1, Elia Stupka 5,✉, Laszlo Orban 1,4,✉
PMCID: PMC2447462  PMID: 18629171

Abstract

Studies on the zebrafish model have contributed to our understanding of several important developmental processes, especially those that can be easily studied in the embryo. However, our knowledge on late events such as gonad differentiation in the zebrafish is still limited. Here we provide an analysis on the gene sets expressed in the adult zebrafish testis and ovary in an attempt to identify genes with potential role in (zebra)fish gonad development and function. We produced 10 533 expressed sequence tags (ESTs) from zebrafish testis or ovary and downloaded an additional 23 642 gonad-derived sequences from the zebrafish EST database. We clustered these sequences together with over 13 000 kidney-derived zebrafish ESTs to study partial transcriptomes for these three organs. We searched for genes with gonad-specific expression by screening macroarrays containing at least 2600 unique cDNA inserts with testis-, ovary- and kidney-derived cDNA probes. Clones hybridizing to only one of the two gonad probes were selected, and subsequently screened with computational tools to identify 72 genes with potentially testis-specific and 97 genes with potentially ovary-specific expression, respectively. PCR-amplification confirmed gonad-specificity for 21 of the 45 clones tested (all without known function). Our study, which involves over 47 000 EST sequences and specialized cDNA arrays, is the first analysis of adult organ transcriptomes of zebrafish at such a scale. The study of genes expressed in adult zebrafish testis and ovary will provide useful information on regulation of gene expression in teleost gonads and might also contribute to our understanding of the development and differentiation of reproductive organs in vertebrates.

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Contributor Information

Elia Stupka, Email: elia@tll.org.sg.

Laszlo Orban, Email: laszlo@tll.org.sg.

Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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