The effect of Huayu Lifei formula on the expression of miR-27a and α-SMA in lung tissue of bleomycin-induced rat lung fibrosis model

Objective:Investigating the inhibitory effect of Huayu Lifyei Formula on bleomycininduced rat pulmonary fibrosis and its impact on the expression of miR-27a andα-SMA.Methods:Wistar rats were arbitrarily classified into a normal group,a model group,and a group treated with Huayu Lifyei Formula,each consisting of ten rats.Pulmonary fibrosis rat model was established by injecting bleomycin.Subsequent to the modeling,the Huayu Lifyei Formula treatment group was administered Huayu Lifyei Formula via gavage for a period of 7 days.Rats were sacrificed on the 14th day after modeling.The right lung was taken for HE staining,Masson staining,and immunohistochemical observation of alpha-smooth muscle actin(α-SMA)expression.The expression of miR-27a was measured by qRT-PCR,with the miR-27a binding site on ACTA2(the gene encodingα-SMA protein)confirmed using dualluciferase reporter gene technology.Results:When compared to the model group,the Huayu Lifyei Formula treatment group showed considerable alleviation of pathological morphological changes in lung tissue,with significant reductions in alveolitis,fibrosis,collagen deposition in lung tissue,and the expression ofα-SMA protein.Meanwhile,the expression of miR-27a in the Huayu Lifyei Formula treatment group significantly increased,and the dual-luciferase reporter gene confirmed the binding site of miR-27a with the ACTA2 gene.Conclusion:Huayu Lifyei Formula can inhibit bleomycin-induced pulmonary fibrosis in rats,and its mechanism may be related to the promotion of miR-27a expression.

化瘀理肺方对肺纤维化大鼠肺组织miR-27a与α-SMA表达的影响

目的:探究化瘀理肺方对博莱霉素诱导大鼠肺纤维的抑制作用与对miR-27a、α-SMA表达的影响。方法:将Wistar大鼠随机分成正常组、模型组和化瘀理肺方治疗组各10只。采用注射博莱霉素构建肺纤维化大鼠模型。化瘀理肺方治疗组在造模7 d后给与化瘀理肺方灌胃治疗7 d。于造模后第14天分组处死大鼠。取右肺进行HE染色,Masson染色和免疫组化观察α-SMA的表达。通过qRT-PCR检测miR-27a的表达,同时采用双荧光素酶报告基因技术检测miR-27a与ACTA2(α-SMA蛋白编码基因)的结合位点。结果:与模型组比较,化瘀理肺方治疗组大鼠肺组织的病理形态学变化明显减轻,肺泡炎及纤维化明显降低,肺组织中胶原沉积明显减少,α-SMA蛋白表达明显降低。同时,化瘀理肺方治疗组肺组织miR-27a表达显著上升,双荧光素酶报告基因证实miR-27a与ACTA2基因存在结合位点。结论:化瘀理肺方可以抑制博莱霉素诱导大鼠肺纤维化,其机制可能与促进miR-27a表达有关。