1,25(OH)2D3抑制肝纤维化大鼠肝组织TGF-β1和α-SMA表达的研究<spanid="corr-video"class="type"style="display:none">附视频</span>

被引:9
|
作者
邓文升
顾磊
周鸿
徐庆
机构
[1] 上海交通大学医学院附属仁济医院胃肠外科
关键词
肝纤维化; 肝星状细胞; 1,25-二羟基维生素D3; 转化生长因子-β1; α-平滑肌肌动蛋白; 大鼠;
D O I
暂无
中图分类号
R575.2 [肝硬变];
学科分类号
摘要
目的观察1,25-二羟基维生素D3(1,25-dihydroxyvitamin D3,1,25(OH)2D3)对四氯化碳(CCL4)诱导的肝纤维化大鼠肝组织TGF-β1和α-SMA表达的作用,并探讨其抗纤维化可能作用机制。方法 SD大鼠30只随机分成正常组、模型组、治疗组,每组10只。采用皮下注射CCL4建立大鼠肝纤维化模型;其中,模型组和治疗组给予皮下注射CCL4,治疗组给予1,25(OH)2D3溶于花生油以3 ng/(100 g·d)灌胃,1次/d,正常组和模型组每天予等量花生油。治疗8周后,肝组织行病理HE染色和Masson染色观察组织形态学变化和纤化维程度;分别采用免疫组化和Western blotting检测肝组织中转化生长因子β1(transforming growth factor Beta 1,TGF-β1)、α-平滑肌肌动蛋白(α-smooth muscle actin,α-SMA)的表达水平。结果病理组织学显示1,25(OH)2D3能明显改善CCL4诱导的肝纤维化大鼠的肝组织结构和肝纤维化。免疫组化染色检测显示,与模型组比较,1,25(OH)2D3治疗组肝组织TGF-β1和α-SMA表达均降低,差异有统计学意义(P<0.05,P<0.01)。Western blotting检测显示模型组TGF-β1和α-SMA表达蛋白水平高于治疗组,差异有统计学意义(P均<0.05)。结论 1,25(OH)2D3可明显减轻CCL4致大鼠肝组织的损伤,抑制肝纤维化发展;其抗肝纤维化的机制可能是减少TGF-β1的表达以及抑制HSC的激活。
引用
收藏
页码:214 / 218
页数:5
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