tailieunhanh - Báo cáo y học: " Nogo-B regulates migration and contraction of airway smooth muscle cells by decreasing ARPC 2/3 and increasing MYL-9 expression"

Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học 'Respiratory Research cung cấp cho các bạn kiến thức về ngành y đề tài: " Nogo-B regulates migration and contraction of airway smooth muscle cells by decreasing ARPC 2/3 and increasing MYL-9 expression. | Xu et al. Respiratory Research 2011 12 14 http content 12 1 14 RESPIRATORY RESEARCH RESEARCH Open Access Nogo-B regulates migration and contraction of airway smooth muscle cells by decreasing ARPC 2 3 and increasing MYL-9 expression 1 1 1 1 -2 1 1 Wujian Xu Weijun Hong Yan Shao Yunye Ning Zailong Cai Qiang Li Abstract Background Abnormal proliferation apoptosis migration and contraction of airway smooth muscle ASM cells in airway remodeling in asthma are basically excessive repair responses to a network of inflammatory mediators such as PDGF but the mechanisms of such responses remain unclear. Nogo-B a member of the reticulum family 4 RTN4 is known to play a key role in arteriogenesis and tissue repair. Further studies are needed to elucidate the role of Nogo-B in airway smooth muscle abnormalities. Methods A mouse model of chronic asthma was established by repeated OVA inhalation and subjected to Nogo-B expression analysis using immunohistochemistry and Western Blotting. Then primary human bronchial smooth muscle cells HBSMCs were cultured in vitro and a siRNA interference was performed to knockdown the expression of Nogo-B in the cells. The effects of Nogo-B inhibition on PDGF-induced HBSMCs proliferation migration and contraction were evaluated. Finally a proteomic analysis was conducted to unveil the underlying mechanisms responsible for the function of Nogo-B. Results Total Nogo-B expression was approximately lower in chronic asthmatic mice compared to naive mice which was obvious in the smooth muscle layer of the airways. Interference of Nogo-B expression by siRNA resulted nearly 96 reduction in mRNA in cultured HBSMCs. In addition knockdown of Nogo-B using specific siRNA significantly decreased PDGF-induced migration of HBSMCs by and increased the cellular contraction by 16 compared to negative controls but had limited effects on PDGF-induced proliferation. Furthermore using proteomic analysis we demonstrate that .

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