Molecular cloning and characterization of unfolded protein response genes from large yellow croaker (Larimichthys crocea) and their expression in response to dietary fatty acids

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• 作者：Kai Liao^a ; ^b ; Jing Yan^a ; ^b ; Songlin Li^a ; ^b ; Tianjiao Wang^a ; ^b ; Wei Xu^a ; ^b ; Kangsen Mai^a ; ^b ; ^c ; Qinghui Ai^a ; ^b ; ^c ; ^{qhai@ouc.edu.cn}
• 关键词：ATF6 ; activating transcription factor-6 ; ATF4 ; activating transcription factor 4 ; BiP/GRP78 ; immunoglobulin heavy chain binding protein/glucose-regulated protein 78 ; CHOP ; C/EBP homologous protein ; ER ; endoplasmic reticulum ; ERAD ; ER-associated protein degradation ; eIF2α ; the α subunit of eukaryotic translation initiation factor 2 ; FO ; fish oil ; IL ; interleukin ; IRE1α ; inositol-requiring transmembrane kinase and endonuclease 1α ; LC-PUFA ; long-chain PUFA ; NF-κB ; nucleus factor-κB ; OO ; olive oil
• 刊名：Comparative Biochemistry and Physiology Part B: Biochemistry and Molecular Biology
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：203
• 期：Complete
• 页码：53-64
• 全文大小：2741 K
• 卷排序：203

文摘

The unfolded protein response (UPR) is a mechanism to cope with perturbed endoplasmic reticulum (ER) functions or accumulation of unfolded protein in the ER in eukaryotic cells. Furthermore, the UPR also participates in a number of physiological and pathological processes, such as nutrient sensing, lipid synthesis, and inflammatory response. In this study, four UPR-related genes (GRP78/BiP, ATF6α, XBP1 and CHO) were isolated characterized from large yellow croaker (Larimichthys crocea), and their expression in response to dietary lipid sources (various fatty acids) such as fish oil (FO), palmic acid (PA), olive oil (OO), sunflower oil (SO), and perilla oil (PO), were examined following feeding. The results showed that the four UPR-related proteins contained highly conserved functional domains and had the closest phylogenetic relationships with other fishes. Additionally, these genes were ubiquitously expressed in large yellow croaker, as in zebrafish and medaka. Moreover, GRP78, ATF6α and spliced XBP1 (XBP1s) mRNA levels in the liver, not in adipose tissue, were significantly increased in the SO group compared to the other groups (P < 0.05). These results indicated that dietary SO activated UPR, and the activation of UPR might provide a mechanism to improve ER function, but probably stimulated lipid synthesis and caused inflammatory response in the liver of large yellow croaker.