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KLF7, one of candidate genes in neurotherapy and metabolic syndrome, has been studied in adipogenesis of mammalian species and birds. However, the effect of the third C2H2 zinc finger of KLF7 for its transcriptional regulation in adipogenesis has not been well understood. Here, the wild-type chicken KLF7 (KLF7) overexpression plasmid, pCMV-myc-KLF7, and two plasmids of chicken KLF7 mutants, i.e. pCMV-myc-KLF7m1 with half of the third zinc finger (KLF7m1) and pCMV-myc-KLF7m2 without the third zinc finger (KLF7m2), were constructed. Luciferase reporter assay in DF1 cells showed that the effect of chicken KLF7 overexpression on the promoter activity of LPL was greater than those of KLF7m1 and KLF7m2 (P &amp;lt; 0.05). There was no significant difference among the overexpression of KLF7, KLF7m1 and KLF7m2 on the promoter activities of FASN, C/EBPα and FABP4 (P &amp;gt; 0.05). Additionally, the effects of KLF7, KLF7m1 and KLF7m2 overexpression on the promoter activity of PPARγ were different. KLF7 overexpression had no significant effect on the PPARγ promoter activity (P &amp;gt; 0.05), KLF7m1 overexpression suppressed PPARγ promoter activity (P &amp;lt; 0.05), while KLF7m2 overexpression facilitated the promoter activity of PPARγ (P &amp;lt; 0.05), consistent with the results of western blot analysis. Our results suggested that the third zinc finger of chicken KLF7 may play a role in its transcriptional regulation of LPL and PPARγ but has no effect on its regulation of C/EBPα, FASN and FABP4. The third zinc finger of KLF7 might be a target for the treatment of metabolic disorder in chicken.

Loss of the third CH zinc finger of chicken KLF7 affects its transcriptional regulation activities in adipose tissue