Transcriptome Profiling Insights the Feature of Sex Reversal Induced by High Temperature in Tongue Sole

Overview

Journal Front Genet

Date 2019 Jun 14

PMID 31191622

Citations 13

Authors

JinXiang Liu

Xiaobing Liu

Chaofan Jin

Xinxin Du

Yan He

Quanqi Zhang

Affiliations

Soon will be listed here.

Abstract

Sex reversal induced by temperature change is a common feature in fish. Usually, the sex ratio shift occurs when temperature deviates too much from normal during embryogenesis or sex differentiation stages. Despite decades of work, the mechanism of how temperature functions during early development and sex reversal remains mysterious. In this study, we used Chinese tongue sole as a model to identify features from gonad transcriptomic and epigenetic mechanisms involved in temperature induced masculinization. Some of genetic females reversed to pseudomales after high temperature treatment which caused the sex ratio imbalance. RNA-seq data showed that the expression profiles of females and males were significantly different, and set of genes showed sexually dimorphic expression. The general transcriptomic feature of pesudomales was similar with males, but the genes involved in spermatogenesis and energy metabolism were differentially expressed. In gonads, the methylation level of promoter was higher in females than in males and pseudomales. Furthermore, high-temperature treatment increased the promoter methylation levels of females. We observed a significant negative correlation between methylation levels and expression of . study showed that CpG within the cAMP response element (CRE) of the promoter was hypermethylated, and DNA methylation decreased the basal and forskolin-induced activities of promoter. These results suggested that epigenetic change, i.e., DNA methylation, which regulate the expression of might be the mechanism for the temperature induced masculinization in tongue sole. It may be a common mechanism in teleost that can be induced sex reversal by temperature.

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The Role of the Heat Shock Cognate Protein 70 Genes in Sex Determination and Differentiation of Chinese Tongue Sole ().

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