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m6A Methylation of Precursor-miR-320/RUNX2 Controls Osteogenic Potential of Bone Marrow-Derived Mesenchymal Stem Cells.

Abstract：

:Methyltransferase-like 3 (METTL3) is the main enzyme for N6-methyladenosine (m6A)-based methylation of RNAs and it has been implicated in many biological and pathophysiological processes. In this study, we aimed to explore the potential involvement of METTL3 in osteoblast differentiation and decipher the underlying cellular and molecular mechanisms. We demonstrated that METTL3 is downregulated in human osteoporosis and the ovariectomized (OVX) mouse model, as well as during the osteogenic differentiation. Silence of METTL3 by short interfering RNA (siRNA) decreased m6A methylation levels and inhibited osteogenic differentiation of bone marrow-derived mesenchymal stem cells (BMSCs) and reduced bone mass, and similar effects were observed in METTL3+/- knockout mice. In contrast, adenovirus-mediated overexpression of METTL3 produced the opposite effects. In addition, METTL3 enhanced, whereas METTL3 silence or knockout suppressed, the m6A methylations of runt-related transcription factor 2 (RUNX2; a key transcription factor for osteoblast differentiation and bone formation) and precursor (pre-)miR-320. Moreover, downregulation of mature miR-320 rescued the decreased bone mass caused by METTL3 silence or METTL3+/- knockout. Therefore, METTL3-based m6A modification favors osteogenic differentiation of BMSCs through m6A-based direct and indirect regulation of RUNX2, and abnormal downregulation of METTL3 is likely one of the mechanisms underlying osteoporosis in patients and mice. Thus, METTL3 overexpression might be considered a new approach of replacement therapy for the treatment of human osteoporosis.

journal_name

Mol Ther Nucleic Acids

journal_title

Molecular therapy. Nucleic acids

authors

Yan G,Yuan Y,He M,Gong R,Lei H,Zhou H,Wang W,Du W,Ma T,Liu S,Xu Z,Gao M,Yu M,Bian Y,Pang P,Li X,Yu S,Yang F,Cai B,Yang L

doi

10.1016/j.omtn.2019.12.001

subject

Has Abstract

pub_date

2020-03-06 00:00:00

pages

421-436

issn

2162-2531

pii

S2162-2531(19)30395-6

journal_volume

19

pub_type

杂志文章

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