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microRNA‐31 inhibition partially ameliorates the deficiency of bone marrow stromal cells from cleidocranial dysplasia
Author(s) -
Xu Ling,
Fu Yu,
Zhu Weiwen,
Xu Rongyao,
Zhang Juan,
Zhang Ping,
Cheng Jie,
Jiang Hongbing
Publication year - 2019
Publication title -
journal of cellular biochemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.028
H-Index - 165
eISSN - 1097-4644
pISSN - 0730-2312
DOI - 10.1002/jcb.28223
Subject(s) - runx2 , gene knockdown , stromal cell , cancer research , downregulation and upregulation , cleidocranial dysplasia , haploinsufficiency , dysplasia , biology , medicine , pathology , transcription factor , microbiology and biotechnology , phenotype , cell culture , genetics , anatomy , gene , supernumerary
Background Cleidocranial dysplasia (CCD) in humans is an autosomal‐dominant skeletal dysplasia caused by heterozygous mutations of the runt‐related transcription factor 2 ( RUNX2 ) and significantly increases the risk of osteoporosis. Increasing evidence demonstrates that the dysfunction of bone marrow stromal cells from CCD patients (BMSCs‐CCD) contributes to the bone deficiency, but the characteristics of BMSCs‐CCD and the mechanisms that underlie their properties remain undefined. Methods The clinical manifestations of three CCD patients were collected and the mutations of RUNX2 were analyzed. The properties of proliferation, osteogenesis, stemness, and senescence of BMSCs‐CCD were compared with that of BMSCs from healthy donors. The expression of microRNA‐31 ( miR‐31 ) between BMSCs‐CCD and BMSCs was measured and lentivirus‐carried miR‐31 inhibitor was used to determine the role of miR‐31 in BMSCs‐CCD both in vitro and in vivo. The molecular mechanisms underlying RUNX2‐miR31 and miR‐31 targeting stemness and senescence of BMSCs‐CCD were also explored. Results We identified two mutation sites of RUNX2 via exome sequencing from 2 of 3 Chinese CCD patients with typical clinical presentations. Compared with BMSCs from healthy donors, BMSCs‐CCD displayed significantly attenuated proliferation, osteogenesis and stemness, and enhanced senescence. Meanwhile, miR‐31 knockdown could ameliorate these deficiency phenotypes of BMSCs‐CCD by regulating SATB2 , BMI1 , CDKN , and SP7 . Mechanistically, RUNX2 directly repressed miR‐31 expression, and therefore RUNX2 haploinsufficiency in CCD leading to miR‐31 upregulation contributed to the deficiency of BMSCs‐CCD. miR‐31 inhibition in BMSCs‐CCD showed enhanced osteogenesis through heterotopic subcutaneous implantation in the nude mice. Conclusions Our results show the functional deficiencies of BMSCs‐CCD and a potential role of miR‐31 in BMSCs‐CCD deficiencies. The application of miR‐31 inhibitor in BMSCs‐CCD might lend hope for developing BMSC‐based therapeutic approaches against CCD‐associated skeletal diseases.