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胸腺素β4对人增生性瘢痕成纤维细胞胶原合成和CTGF表达的影响

发布时间:2018-08-15 17:13
【摘要】:目的: 拟通过观察人增生性瘢痕成纤维细胞(hypertrophicscar fibroblasts HSFB)经胸腺素β4(thymosin beta4)干预后,检测其Ⅰ型和Ⅲ型胶原蛋白的生成水平及表达结缔组织生长因子(connective tissue growth factor CTGF)的变化,以期了解胸腺素β4在病理性瘢痕发病中的作用机制。 方法: 标本来自本院整形科的患者(伤后半年内),采用组织块消化法培养细胞。成纤维细胞培养至3-6代细胞后进行实验,共分成5组,其中空白对照组,加入无血清的培养基;实验组:加入不同浓度的胸腺素β4(0.05、0.1、1、5μg/mL)无血清培养基作用培养6小时。(1)采用ELISA法检测细胞上清液中Ⅰ型和Ⅲ型胶原蛋白的含量;(2)通过反转录-聚合酶链反应(RT-PCR)法观察结缔组织生长因子(CTGF)mRNA的表达;(3)采用蛋白印迹法(Western blot)观测CTGF蛋白的表达。 结果: (1)各实验浓度的胸腺素β4作用6小时后Ⅰ型和Ⅲ型胶原蛋白分泌的值为:5μg/ml组(0.111±0.004、0.112±0.010),1μg/ml组(0.113±0.005、0.140±0.030),0.1μg/ml组(0.114±0.006、0.178±0.010),0.05μg/ml组(0.117±0.004、0.190±0.016),空白组(0.154±0.105,0.222±0.003),各实验组与对照组差异有统计学意义(P0.05)。结果显示,各实验浓度胸腺素β4作用后增生性瘢痕成纤维细胞Ⅰ型和Ⅲ型胶原蛋白的分泌量减少。 (2)各实验浓度的胸腺素β4作用6小时后(CTGF)mRNA表达灰度比值为:5μg/ml组(0.556±0.050),1μg/ml组(0.638±0.038),0.1μg/ml组(0.730±0.026),0.05μg/ml组(0.873±0.035),空白组(1.132±0.074),各实验组与对照组差异有统计学意义(P0.05)。结果显示,各实验浓度(0.05、0.1、1、5μg/mL)胸腺素β4作用后增生性瘢痕成纤维细胞CTGFmRNA表达降低。 (3)各实验浓度的胸腺素β4作用6小时后(CTGF)蛋白表达灰度比值为:5μg/ml组(0.510±0.044),,1μg/ml组(0.532±0.026),0.1μg/ml组(0.658±0.032),0.05μg/ml组(0.743±0.035),空白组(0.953±0.040),各实验组与对照组差异有统计学意义(P0.05)。结果显示,各实验浓度(0.05、0.1、1、5μg/mL)胸腺素β4作用后均可以引起增生性瘢痕成纤维细胞CTGF蛋白表达降低。 结论: 胸腺素β4能剂量依赖性地降低增生性瘢痕成纤维细胞Ⅰ、Ⅲ型胶原蛋白的分泌及结缔组织生长因子(CTGF)的表达。我们推认:胸腺素β4可能是通过这条途径来影响瘢痕生成。
[Abstract]:Objective: to investigate the expression of connective tissue growth factor (connective tissue growth factor CTGF) in human hypertrophic scar fibroblasts (hypertrophicscar fibroblasts HSFB) after the intervention of thymosin 尾 4 (thymosin beta4). To understand the mechanism of thymosin 尾 4 in the pathogenesis of pathological scar. Methods: the specimens were collected from patients from plastic surgery department of our hospital (within six months after injury) and the cells were cultured by tissue mass digestion. The fibroblasts were cultured to 3-6 passages and were divided into five groups: blank control group and serum-free medium. Experimental group: thymosin 尾 _ 4 (0.05 ~ 0.1U ~ (-1) 渭 g/mL) was added to the serum free medium for 6 hours. (1) the content of type 鈪

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