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Conservation, sex-biased expression and functional annotation of microRNAs in the gonad of Amur sturgeon (Acipenser schrenckii).

Identifieur interne : 000062 ( PubMed/Corpus ); précédent : 000061; suivant : 000063

Conservation, sex-biased expression and functional annotation of microRNAs in the gonad of Amur sturgeon (Acipenser schrenckii).

Auteurs : Xiujuan Zhang ; Lihong Yuan ; Linmiao Li ; Haiying Jiang ; Jinping Chen

Source :

Comparative biochemistry and physiology. Part D, Genomics & proteomics [ 1878-0407 ] ; 2016.

RBID : pubmed:27089517

Abstract

MicroRNAs (miRNAs) are involved in post-transcriptional gene regulation and have crucial roles in regulating the expression of gametogenesis-related genes in animals. However, the mechanism of sex determination and differentiation in the sturgeon has remained unclear. Identifying miRNAs and characterizing sex-biased miRNA expression is therefore critical for understanding the role of miRNAs during sexual differentiation in sturgeon. In this study, five different tissues from sturgeon before sex differentiation and the gonads were used for miRNA expression profiling. We screened 1037 miRNAs in miRBase 20.0 and an additional 103 sturgeon miRNAs using microarray and real-time PCR. We found that the sequences of 477 miRNAs out of a total of 1140 miRNAs were highly conserved (100%) among different fish species. From a total of 663 non-redundant miRNA probes, 481 miRNAs were detected in the gonads of both sexes. Of the 148 miRNAs that were identified to have sex-biased expression patterns between the testis and the ovary (P<0.01), 21 miRNAs (14.19%) were relatively highly expressed in the testis or the ovary with fold-changes >2. The microarray expression patterns of 13 randomly selected sex-biased miRNAs were validated using real-time PCR. Target gene prediction revealed a significant enrichment of functional groups (88 GO terms) and 18 KEGG pathways (P<0.05) and suggested that there are interactions between sex-biased miRNAs and 25 putative gametogenesis-related targets. Therefore, our miRNA expression analysis in juvenile A. schrenckii establishes a foundation for understanding and further investigating the role of miRNAs in sturgeon sex differentiation.

DOI: 10.1016/j.cbd.2016.04.001
PubMed: 27089517

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<front><div type="abstract" xml:lang="en">MicroRNAs (miRNAs) are involved in post-transcriptional gene regulation and have crucial roles in regulating the expression of gametogenesis-related genes in animals. However, the mechanism of sex determination and differentiation in the sturgeon has remained unclear. Identifying miRNAs and characterizing sex-biased miRNA expression is therefore critical for understanding the role of miRNAs during sexual differentiation in sturgeon. In this study, five different tissues from sturgeon before sex differentiation and the gonads were used for miRNA expression profiling. We screened 1037 miRNAs in miRBase 20.0 and an additional 103 sturgeon miRNAs using microarray and real-time PCR. We found that the sequences of 477 miRNAs out of a total of 1140 miRNAs were highly conserved (100%) among different fish species. From a total of 663 non-redundant miRNA probes, 481 miRNAs were detected in the gonads of both sexes. Of the 148 miRNAs that were identified to have sex-biased expression patterns between the testis and the ovary (P<0.01), 21 miRNAs (14.19%) were relatively highly expressed in the testis or the ovary with fold-changes >2. The microarray expression patterns of 13 randomly selected sex-biased miRNAs were validated using real-time PCR. Target gene prediction revealed a significant enrichment of functional groups (88 GO terms) and 18 KEGG pathways (P<0.05) and suggested that there are interactions between sex-biased miRNAs and 25 putative gametogenesis-related targets. Therefore, our miRNA expression analysis in juvenile A. schrenckii establishes a foundation for understanding and further investigating the role of miRNAs in sturgeon sex differentiation.</div>
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Conservation, sex-biased expression and functional annotation of microRNAs in the gonad of Amur sturgeon (Acipenser schrenckii).

Conservation, sex-biased expression and functional annotation of microRNAs in the gonad of Amur sturgeon (Acipenser schrenckii).

Source :

Abstract

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