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2016 ; 6
(ä): 28897
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Long Non-coding RNA H19 Inhibits Adipocyte Differentiation of Bone Marrow
Mesenchymal Stem Cells through Epigenetic Modulation of Histone Deacetylases
#MMPMID27349231
Huang Y
; Zheng Y
; Jin C
; Li X
; Jia L
; Li W
Sci Rep
2016[Jun]; 6
(ä): 28897
PMID27349231
show ga
Bone marrow mesenchymal stem cells (BMSCs) exhibit an increased propensity toward
adipocyte differentiation accompanied by a reduction in osteogenesis in
osteoporotic bone marrow. However, limited knowledge is available concerning the
role of long non-coding RNAs (lncRNAs) in the differentiation of BMSCs into
adipocytes. In this study, we demonstrated that lncRNA H19 and microRNA-675
(miR-675) derived from H19 were significantly downregulated in BMSCs that were
differentiating into adipocytes. Overexpression of H19 and miR-675 inhibited
adipogenesis, while knockdown of their endogenous expression accelerated
adipogenic differentiation. Mechanistically, we found that miR-675 targeted the
3' untranslated regions of the histone deacetylase (HDAC) 4-6 transcripts and
resulted in deregulation of HDACs 4-6, essential molecules in adipogenesis. In
turn, trichostatin A, an HDAC inhibitor, significantly reduced CCCTC-binding
factor (CTCF) occupancy in the imprinting control region upstream of the H19 gene
locus and subsequently downregulated the expression of H19. These results show
that the CTCF/H19/miR-675/HDAC regulatory pathway plays an important role in the
commitment of BMSCs into adipocytes.