黄芪多糖在深Ⅱ度烧伤大鼠创面愈合中的作用及其机制

被引:6
作者
郑凡 [1 ]
蔡玉娥 [1 ]
李黎 [1 ]
韩大伟 [2 ]
机构
[1] 商丘市第一人民医院烧伤整形外科, 商丘
[2] 郑州市第一人民医院烧伤科, 郑州
关键词
烧伤; 炎症; 伤口愈合; 黄芪多糖; 整合素连接激酶;
D O I
暂无
中图分类号
R285.5 [中药实验药理];
学科分类号
100806 [中药药理学];
摘要
目的探讨黄芪多糖对深Ⅱ度烧伤大鼠创面愈合的影响及其机制。方法采用实验研究方法。取50只雄性7周龄SD大鼠, 按照随机数字表法分为正常组、单纯烧伤组、黄芪多糖组、抑制剂组和抑制剂+黄芪多糖组, 每组10只。除正常组外, 其余4组大鼠均在背部制作1个深Ⅱ度烧伤创面。正常组、单纯烧伤组大鼠腹腔注射生理盐水, 其余3组大鼠分别注射黄芪多糖和/或整合素连接激酶(ILK)抑制剂。注射7 d后, 计算4组烧伤大鼠创面愈合率, 采用酶联免疫吸附测定(ELISA)法检测5组大鼠血清中γ干扰素、白细胞介素2(IL-2)和肿瘤坏死因子α(TNF-α)含量。取正常组大鼠正常皮肤组织及4组烧伤大鼠创面组织, 测定水分并计算水分占比, 采用ELISA法检测γ干扰素、IL-2和TNF-α的含量, 采用实时荧光定量反转录PCR法检测表皮生长因子(EGF)、碱性成纤维细胞生长因子(bFGF)以及ILK mRNA表达量, 采用蛋白质印迹法检测ILK、蛋白激酶B(Akt)、磷酸化Akt(p-Akt)、糖原合成激酶-3β(GSK-3β)及磷酸化GSK-3β(p-GSK-3β)蛋白表达量。对数据行单因素方差分析、LSD检验。结果注射7 d后, 黄芪多糖组大鼠创面愈合率为(67±5)%, 明显高于单纯烧伤组的(52±4)%和抑制剂+黄芪多糖组的(59±5)%(P值均<0.05);抑制剂+黄芪多糖组大鼠创面愈合率明显高于抑制剂组的(48±4)%(P<0.05)。注射7 d后, 与正常组大鼠血清或正常皮肤组织比较, 单纯烧伤组大鼠血清中γ干扰素、TNF-α、IL-2含量和创面组织水分占比均明显升高(P<0.05);与黄芪多糖组比较, 单纯烧伤组和抑制剂+黄芪多糖组大鼠血清中γ干扰素、TNF-α、IL-2含量及创面组织水分占比均明显升高(P<0.05);与抑制剂组比较, 抑制剂+黄芪多糖组大鼠血清中γ干扰素、TNF-α、IL-2含量及创面组织水分占比均明显降低(P<0.05)。注射7 d后, 与正常组大鼠正常皮肤组织比较, 单纯烧伤组大鼠创面组织中γ干扰素、TNF-α和IL-2含量均明显升高(P<0.05);与黄芪多糖组比较, 单纯烧伤组和抑制剂+黄芪多糖组大鼠创面组织中γ干扰素、TNF-α和IL-2含量均明显升高(P<0.05);与抑制剂组比较, 抑制剂+黄芪多糖组大鼠创面组织中γ干扰素、TNF-α和IL-2含量均明显降低(P<0.05)。注射7 d后, 与正常组大鼠正常皮肤组织比较, 单纯烧伤组大鼠创面组织中EGF、bFGF、ILK mRNA表达量及ILK、p-Akt、p-GSK-3β蛋白表达量均明显升高(P<0.05);与黄芪多糖组比较, 单纯烧伤组和抑制剂+黄芪多糖组大鼠创面组织中EGF、bFGF和ILK mRNA表达量及ILK、p-Akt、p-GSK-3β蛋白表达量均明显降低(P<0.05);与抑制剂组比较, 抑制剂+黄芪多糖组大鼠创面组织中EGF、bFGF和ILK mRNA表达量以及ILK、p-Akt、p-GSK-3β蛋白表达量均明显升高(P<0.05)。正常组大鼠正常皮肤组织以及4组烧伤大鼠创面组织中Akt和GSK-3β蛋白表达量比较, 差异均无统计学意义(P>0.05)。结论黄芪多糖可能通过激活ILK/Akt/GSK-3β信号通路, 减轻深Ⅱ度烧伤大鼠全身和局部炎症反应, 减轻组织水肿, 促进愈合因子表达, 从而促进创面愈合。
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