Document Detail

Functions and mechanisms of intermittent negative pressure for osteogenesis in human bone marrow mesenchymal stem cells.
MedLine Citation:
PMID:  24567078     Owner:  NLM     Status:  In-Data-Review    
The present study aimed to determine the mechanism by which low‑intensity intermittent negative pressure affects the differentiation and proliferation of human mesenchymal stem cells (MSCs). Alkaline phosphatase (ALP) activity, type I collagen and vascular endothelial growth factor (VEGF) were detected to analyze differentiation. MTT and flow cytometry were employed to measure proliferation and apoptosis. Western blot analysis was used to examine endoplasmic reticulum (ER) stress‑associated factors. This study was divided into two groups, including a normal group (without any treatment) and vacuum group (treated with a vacuum). There was a significant decrease in the proliferation of cells in the vacuum group. The number of cells in S phase was reduced significantly, while the rate of apoptosis and the activity of ALP were markedly increased under vacuum conditions. Expression of collagen type I and VEGF was significantly increased, and the ratio of osteoprotegrin to osteoprotegrin ligand was decreased significantly in the vacuum group. ER stress‑associated proteins, p‑PRKR‑like ER kinase, inositol‑requiring enzyme 1 and cleaved activating transcription factor 6, as well as the downstream factors, were activated when treated with negative pressure. In conclusion, treatment with low‑intensity and intermittent negative pressure may inhibit the proliferation of MSCs and trigger ER stress‑associated cellular apoptosis, further enhancing osteogenesis activity and inducing differentiation to osteoblasts.
Zhi Yang; Jian-Feng Yao; Peng Xu; Jian-Bing Zhang; Yu-Min Zhang; Yang-Jun Zhu; Si-Qing Qin; Lin Liu; Hui Liu; Wei-Kun Hou; Ke Xu
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Publication Detail:
Type:  Journal Article     Date:  2014-02-19
Journal Detail:
Title:  Molecular medicine reports     Volume:  9     ISSN:  1791-3004     ISO Abbreviation:  Mol Med Rep     Publication Date:  2014 Apr 
Date Detail:
Created Date:  2014-02-26     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101475259     Medline TA:  Mol Med Rep     Country:  Greece    
Other Details:
Languages:  eng     Pagination:  1331-6     Citation Subset:  IM    
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