Abstract

Induced pluripotent stem cells (iPSCs) can enhance the efficiency of buffalo genetic improvements because of their differentiation potential and proliferation ability, which are similar to those of embryonic stem cells. However, very few studies have focussed on buffalo iPSCs, and a stable induction system has not been established for buffalo somatic cell reprogramming. In this study, we constructed a PiggyBac transposon vector co-expressing buffalo OCT4, C-MYC, KLF4 and SOX2 genes (PB_OMKS) separated by the nucleotide sequence of three 2A peptides and established the buffalo foetal skin fibroblast (BFSF) cell line BFSF_OMKS. RNA-seq technology and bioinformatics analysis methods were mainly employed to perform a transcriptome analysis between BFSF and BFSF_OMKS. The results revealed that over-expression of OCT4, C-MYC, KLF4 and SOX2 in BFSFs led to the activation of reprogramming-related LIF, activin, BMP4, SMAD1/5/9 and Wnt signals. These results increased our understanding of buffalo somatic cell reprogramming mechanisms and could provide a possible theory for the selection of small-molecule cocktails to promote reprogramming.

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