Genome-Wide Analysis of Alternative Splicing (AS) Mechanism Provides Insights into Salinity Adaptation in the Livers of Three Euryhaline Teleosts, including Scophthalmus maximus , Cynoglossus semilaevis and Oncorhynchus mykiss

Salinity is an important environmental factor that directly affects the survival of aquatic organisms, including fish. However, the underlying molecular mechanism of salinity adaptation at post-transcriptional regulation levels is still poorly understood in fish. In the present study, 18 RNA-Seq dat...

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Bibliographic Details
Published in:Biology
Main Authors: Yuan Tian, Qinfeng Gao, Shuanglin Dong, Yangen Zhou, Han Yu, Dazhi Liu, Wenzhao Yang
Format: Article in Journal/Newspaper
Language:English
Published: MDPI AG 2022
Subjects:
alternative splicing
salinity adaptation
teleosts
RNA-Seq
RNA splicing
Biology (General)
QH301-705.5
Scophthalmus maximus
Turbot
Online Access:https://doi.org/10.3390/biology11020222
https://doaj.org/article/ebbb8474d7184ad6960a94be7e2575fa
Description
Summary:Salinity is an important environmental factor that directly affects the survival of aquatic organisms, including fish. However, the underlying molecular mechanism of salinity adaptation at post-transcriptional regulation levels is still poorly understood in fish. In the present study, 18 RNA-Seq datasets were utilized to investigate the potential roles of alternative splicing (AS) in response to different salinity environments in the livers of three euryhaline teleosts, including turbot ( Scophthalmus maximus ), tongue sole ( Cynoglossus semilaevis ) and steelhead trout ( Oncorhynchus mykiss ). A total of 10,826, 10,741 and 10,112 AS events were identified in the livers of the three species. The characteristics of these AS events were systematically investigated. Furthermore, a total of 940, 590 and 553 differentially alternative splicing (DAS) events were determined and characterized in the livers of turbot, tongue sole and steelhead trout, respectively, between low- and high-salinity environments. Functional enrichment analysis indicated that these DAS genes in the livers of three species were commonly enriched in some GO terms and KEGG pathways associated with RNA processing. The most common DAS genes work as RNA-binding proteins and play crucial roles in the regulation of RNA splicing. The study provides new insights into uncovering the molecular mechanisms of salinity adaptation in teleosts.

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