红芪黄酮对肺间质纤维化模型大鼠微血管密度的影响

Effects of Radix Hedysari Flavonoid on Microvessel Density of Pulmonary Interstitial Fibrosis Model Rats

目的观察红芪黄酮对肺间质纤维化模型大鼠微血管密度(MVD)的影响,为其开发提供实验依据。方法 SPF级Wistar大鼠随机分为空白组、模型组、强的松组和红芪黄酮高、中、低剂量组,采用博莱霉素气管滴入方法建立肺纤维化模型,自造模后第2日,各治疗组分别给予相应剂量药物,按时间点连续灌胃治疗14 d和28 d,采用免疫组化法观察肺组织MVD。结果模型组大鼠14 d肺组织内可见新生微血管显著增多,28 d有所减少。与空白组比较,模型组14、28 d MVD显著升高(P<0.01)。与模型组比较,红芪黄酮高剂量组14、28 d MVD明显降低(P<0.05)。红芪黄酮中剂量组表达介于高剂量组与低剂量组之间,红芪黄酮低剂量组表达与模型组相近。结论红芪黄酮具有抑制肺纤维化大鼠微血管新生的作用,其作用与剂量相关。

Objective To discuss the effects of Radix Hedysari flavonoids on microvessel density （MVD） of pulmonary interstitial fibrosis model rats, and provide evidence for its development. Methods SPF Wistar rats were divided into blank group, model group, prednisone group, and Radix Hedysari flavonoids high-, medium- and low-dosage group. Pulmonary interstitial fibrosis model was established by intratracheal instillation of bleomycin. From the second day after model established, each drug treatment group was administered with corresponding drugs intragastrically at different points in time for 14 and 28 days. MVD was detected by immunohistochemistry. Results Neomicrovessel was increased significantly in pulmonary tissue of model rats of 14 days treatment, but slightly decreased in 28 days. MVD in 14, 28 days model group was significantly more than blank group （P〈0.01）. MVD in 14, 28 days Radix Hedysari flavonoids high dosage group was significantly less than model group （P〈0.01）. MVD in Radix Hedysari flavonoids medium-dosage group was between high-and low-dosage group, and MVD in medium-dosage group was similar with that in model group. Conclusion Radix Hedysari flavonoids could inhibit the formation of neomicrovessel in a dose dependent manner.