M3型乙酰胆碱受体对血管平滑肌细胞Ⅰ型胶原蛋白的表达及机制  被引量:1

Effects of m3 muscarinic acetylcholine receptor on collagen type Ⅰ expression and associated mechanism in vascular smooth muscle cells

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作  者:焦周阳[1] 吴静[2] 刘超[1] 文冰[1] 付国伟[1] 杜心灵[3] 赵文增 

机构地区:[1]郑州大学第一附属医院心血管外科,450052 [2]郑州大学第一附属医院儿科,450052 [3]华中科技大学同济医学院附属协和医院心血管外科,武汉430022

出  处:《中华实验外科杂志》2016年第9期2163-2165,共3页Chinese Journal of Experimental Surgery

基  金:国家自然科学基金(81300685)

摘  要:目的 探讨M3型乙酰胆碱受体(M3R)对血管平滑肌细胞Ⅰ型胶原蛋白(COL-Ⅰ)表达影响及其机制.方法 体外培养A7r5大鼠主动脉平滑肌细胞株,Western blot法测定COL-Ⅰ、细胞外信号调节激酶1/2 (ERK1/2)、磷酸化ERK1/2 (p-ERK1/2)和转化生长因子-β1 (TGF-β1)表达.结果 乙酰胆碱(Ach 1.0×10^-7、1.0×10^-6、1.0×10^-5 mol/L,2h)呈浓度依赖性促进COL-Ⅰ的表达(P<0.05),M3R特异性阻断剂4-DAMP抑制Ach(1.0×10^-6mol/L)介导COL-Ⅰ表达(1.302±0.181比1.892±0.292,P<0.05);M3R促进p-ERK1/2表达上调(165%,P<0.05),ERK1/2特异性抑制剂U0126抑制M3R介导的COL-Ⅰ表达(1.421±0.176比1.912±0.190,P<0.05);M3R促进TGF-β1的表达(194%,P<0.05),TGF-β1特异性抑制剂SB431542抑制M3R介导的p-ERK1/2表达上调(1.121 ±0.059比1.875±0.078,P<0.05).结论 M3R通过激活TGF-β1-ERK1/2信号通路促进COL-Ⅰ的表达。Objective To investigate the effects of m3 muscarinic acetylcholine receptor (M3R) on collagen type Ⅰ (COL-Ⅰ) expression and its related mechanisms.Methods In cultured vascular smooth muscle cells A7r5,Western blotting was used to examine the protein expression of COL-Ⅰ,extracellular signal regulated kinase 1 and 2 (ERK1/2),phosphorylated-ERK1/2 (p-ERK1/2) and transforming growth factor-β1 (TGF-β1).Results M3R agonist acetycholine (1.0 × 10^-9,1.0 x 10^-8,1.0 x 10^-7 mol/L) up-regulated COL-Ⅰ expression in A7r5 (P 〈 0.05),and the effect could be attenuated by M3R selective antagonist 4-diphenylacetoxy-N-methylpiperidine methiodide (4-DAMP)(1.302±0.181 vs.1.892 ±0.292,P 〈0.05).Furthermore,the up-regulation of COL-Ⅰ expression by M3R appeared to be mediated by an upregulation in phosphorylation of ERK1/2 (1.764 ± 0.067 vs.1.115± 0.053,P 〈 0.05).In addition,M3R enhanced the TGF-β1 expression (1.894 ± 0.064 vs.0.972 ± 0.037,P 〈 0.05) and TGF-β1 antagonist SB431542 inhibited M3R-induced p-ERK1/2 up-regulation (1.121 ±0.059 vs.1.875 ± 0.078,P〈0.05).Conclusion These results suggest that M3R promotes COL-I expression in A7r5 via TGF-β1-ERK1/2 signaling pathway.

关 键 词:M3型乙酰胆碱受体 Ⅰ型胶原蛋白 细胞外信号调节激酶1/2 转化生长因子-Β1 

分 类 号:R543[医药卫生—心血管疾病]

 

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