Transcriptome analysis provides insights into long noncoding RNAs in medaka gonads.

Comparative Biochemistry and Physiology. Part D, Genomics & Proteomics
Shaoyu GuoMingyou Li

Abstract

Long non-coding RNAs (lncRNAs) are gradually regarded as regulators in sex determination and gonad development of various animals. Medaka (Oryzias latipes) is an excellent reproductive research model with sex-determining genes. However, the regulation of gonadal lncRNAs on medaka reproductive development remains unknown. Here, 5317 lncRNAs were obtained from medaka ovary and testis by Illumina HiSeq4000, among which 177 lncRNAs were up-regulated and 120 lncRNAs were down-regulated in the testis compared to the ovary. In addition, 6904 cis-regulated target genes were predicted from 3099 lncRNAs. GO and KEGG enrichment analysis showed that these target genes were mainly involved in phosphorylation, metabolic, metabolism of xenobiotics by cytochrome P450, insulin secretion, and GnRH signaling pathways. Furthermore, six highly expressed lncRNAs were randomly selected to verify the sequencing data by quantitative real time PCR (qRT-PCR). Next, in situ hybridization revealed that one of the sex-biased lncRNA MSTRG.14827.1 was highly expressed in immature germ cells, indicating MSTRG.14827.1 may play a key role in gametogenesis. Taken together, this study provides emerging lncRNA libraries and opens new avenues for future investigatio...Continue Reading

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