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Genome-wide identification and expression analysis of Bcl-2 gene family under low temperature stress in tilapia (Oreochromis niloticus)

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文献类型：外文期刊

作者： Yang, Changgeng ¹ ; Wang, Meizi ² ; Wen, Hua ² ; Jiang, Ming ² ; Tian, Juan ² ; Lu, Xing ² ;

作者机构： 1.Lingnan Normal Univ, Life Sci & Technol Sch, Zhanjiang 524048, Peoples R China

2.Chinese Acad Fishery Sci, Yangtze River Fisheries Res Inst, Key Lab Freshwater Biodivers Conservat, Minist Agr & Rural Affairs, Wuhan 430223, Peoples R China

关键词： tilapia; Bcl-2; Phylogeny; low temperature stress; expression profile

期刊名称：ISRAELI JOURNAL OF AQUACULTURE-BAMIDGEH （影响因子：0.275；五年影响因子：0.43 ）

ISSN： 0792-156X

年卷期： 2020 年 72 卷

页码：

收录情况： SCI

摘要： Low temperature stress can lead to variety of changes, including apoptosis in tilapia (Oreochromis niloticus). The B cell lymphoma-2 (Bcl-2) gene family plays an important role in the process of apoptosis. The present study conducted genome-wide characterization of the Bcl-2 family genes in tilapia and their mRNA expression profiles were analyzed in different tissues of tilapia under the low temperature stress (10 degrees C). Twenty-four Bcl-2 family genes were identified, containing 2 similar to 8 exons. These genes were classified into two subfamilies ( Bcl-2 homologs and BH3-only) based on their conserved domains. Besides, these BCL-2 proteins in tilapia possess at least one of the four conserved BH domains. The phylogenetic analysis showed that the Bcl-2 family genes did not aggregate by species, demonstrating sequence conservation of different types of Bcl-2 family members. Real-time quantitative PCR (RT-qPCR) analysis showed that Bcl-2 family genes were broadly expressed in different tissues of tilapia. When reared at 10 degrees C, the transcriptional expression levels of most of anti-apoptotic Bcl-2 homologs subgroup members and other BH3-only subgroup members in most tissues of tilapia were higher than those at 30 degrees C. However, most of other Bcl-2 family members revealed a lower expression. The results suggested that hypothermia had significantly induced apoptotic in tilapia.

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