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Hsp60/10 and sHsp families of heat shock protein genes in rainbow trout (Oncorhynchus mykiss) and their expression under heat stress

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Abstract

Heat shock proteins (Hsps) are highly conserved proteins whose expression can be induced by high temperature and play an important role in a variety of biological processes. However, systematic identification of the Hsp60/10 and small Hsp (sHsp) gene family in rainbow trout has not yet been reported, and there is little available information about its roles in evolution in rainbow trout, a typical economical cold-water fish. In this study, we performed a comprehensive analysis of the rainbow trout Hsp60/10 and sHsp gene family and to investigate their expression profiles. A total of one Hsp60 gene, one Hsp10 gene, and ten sHsp genes were identified. According to RNA-seq analysis of rainbow trout liver and head kidney under heat stress, a total of six out of ten sHsp genes were significantly upregulated in liver and head kidney. Real-time RT-PCR (RT-qPCR) was used to quantitatively analyze the expression levels of these genes in different tissues of rainbow trout. Results showed that the expression of hspe1 and hspd1 was lowest in liver and gill, respectively, and highest in brain. In sHsp gene family, all genes are highly expressed in the liver and head kidney, but relatively low in the heart, spleen, brain, gills, and muscles. This systematic analysis provided valuable information about the diverse roles of Hsp60/10 and sHsp in the evolution of teleost fish, which will contribute to the functional characterization of Hsp60/10 and sHsp genes in further research.

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Funding

This work was supported by the National Natural Science Foundation of China under Grant (No. 31960268).

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FA and LT conceived and designed the study; FA and QN performed experiments; FA, LT, and QN analyzed the data; and FA, LT, and QN edited and revised the manuscript.

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Correspondence to Fang Ma.

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The authors declare that they have no conflict of interest.

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All the methods used in this study were carried out according to the guiding principles of the Chinese Legislation on the Use and Care of Laboratory Animals. Protocol was approved by the Institutional Ethic Committee of Tianshui Normal University (TSAU).

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Ma, F., Luo, L.T. & Wang, Q. Hsp60/10 and sHsp families of heat shock protein genes in rainbow trout (Oncorhynchus mykiss) and their expression under heat stress. Aquacult Int 30, 1–18 (2022). https://doi.org/10.1007/s10499-020-00638-6

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  • DOI: https://doi.org/10.1007/s10499-020-00638-6

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