Abstract:
:Embryonic stem cells (ESCs) and induced pluripotent stem cells (iPSCs) hold great promise for regenerative medicine, disease treatment, and organ transplantation. As the ethical issue of human ESCs and similarity of pig in human genome and physiological characteristics, the porcine iPSCs (piPSCs) have become an ideal alternative study model. N6-methyladenosine (m6A) methylation is the most prevalent modification in eukaryotic mRNAs, regulating the self-renewal and differentiation of pluripotency stem cells. However, the explicit m6A-regulating machinery remains controversial. Here, we demonstrate that m6A modification and its modulators play a crucial role in mediating piPSCs pluripotency. In brief, loss of METTL3 significantly impairs self-renewal and triggers differentiation of piPSCs by interfering JAK2 and SOCS3 expression, further inactivating JAK2-STAT3 pathway, which then blocks the transcription of KLF4 and SOX2. We identify that both of JAK2 and SOSC3 have m6A modification at 3'UTR by m6A-seq analysis. Dual-luciferase assay shows that METTL3 regulates JAK2 and SOCS3 expression in an m6A-dependent way. RIP-qPCR validates JAK2 and SOCS3 are the targets of YTHDF1 and YTHDF2, respectively. SiMETTL3 induced lower m6A levels of JAK2 and SOCS3 lead to the inhibition of YTHDF1-mediated JAK2 translation and the block of YTHDF2-dependent SOCS3 mRNA decay. Subsequently, the altered protein expressions of JAK2 and SOCS3 inhibit JAK2-STAT3 pathway and then the pluripotency of piPSCs. Collectively, our work uncovers the critical role of m6A modification and its modulators in regulating piPSCs pluripotency and provides insight into an orchestrated network linking the m6A methylation and SOCS3/JAK2/STAT3 pathway in pluripotency regulation.
journal_name
Cell Death Disjournal_title
Cell death & diseaseauthors
Wu R,Liu Y,Zhao Y,Bi Z,Yao Y,Liu Q,Wang F,Wang Y,Wang Xdoi
10.1038/s41419-019-1417-4subject
Has Abstractpub_date
2019-02-20 00:00:00pages
171issue
3issn
2041-4889pii
10.1038/s41419-019-1417-4journal_volume
10pub_type
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