GATA4, as a member of the GATA transcription factor family, plays a significant role in lineage specification and trans- differentiation of cells by regulating target gene expression. In this study, the potential transcription factor binding sites in the pro- moter of Paralichthys olivaceus sox2 gene were analyzed, and a GATA4-binding motif was identified. A cleaved amplified poly- morphic sequence-based binding assay experiment was performed, and the results showed a significant binding process between the Homo sapiens GATA4 recombinant protein and the DNA fragment of P. olivaceus sox2 promoter. Luciferase reporter assay revealed that GATA4 could improve the activity of the P. olivaceus sox2 promoter. Overexpression of P. olivaceus GATA4 could also increase the sox2 mRNA expression level in flounder brain cells. Overall, our results indicate that sox2 is a target gene of GATA4 in P. oliva- ceus. Sox2 is implicated in the maintenance of stem cell pluripotency and can reprogram differentiated cells to iPS cells. In addition, sox2 is involved in the development of the central nervous system (CNS). Therefore, this study may provide a reference for exploring the function of P. olivaceus GATA4 in the regulation of pluripotent stem cells and the development of the CNS.

LIU Xiumei;LI Zan;YAN Weijie;ZHAO Haitao;LIU Yuxiang;HAN Miao;WANG Xubo;HE Yan;YU Haiyang;ZHANG Quanqi

College of Life Sciences,Yantai University,Yantai 264005,China;Key Laboratory of Marine Genetics and Breeding,Ministry of Education,Ocean University of China,Qingdao 266003,China;Dongying Municipal Bureau of Marine Development and Fisheries,Dongying 257000,China;Laboratory for Marine Fisheries Science and Food Production Processes,Qingdao National Laboratory for Marine Science and Technology,Qingdao 266237,China

中国海洋大学学报（自然科学英文版）

[1]LIU Xiumei;LI Zan;YAN Weijie;ZHAO Haitao;LIU Yuxiang;HAN Miao;WANG Xubo;HE Yan;YU Haiyang;ZHANG Quanqi-.GATA4 Is a Transcriptional Regulator of SOX2 in Japanese Flounder (Paralichthys olivaceus))[J].中国海洋大学学报（自然科学英文版）,2022(01):163-170

Flounder,flounder,oliva,ceus

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