Page 27 - 2019年10月第30卷第20期
P. 27
ABSTRACT OBJECTIVE:To investigate the effects of Buyang huanwu decoction on endothelial-mesenchymal transformation
(EndMT)of lung tissue in idiopathic pulmonary fibrosis(IPF)model rats,and to explore its potential mechanism. METHODS:
Male SD rats were randomly divided into normal group,model gorup,dexamethasone group [0.405 mg/(kg·d)],Buyang huanwu
decoction low-dose,medium-dose and high-dose groups [6.435,12.87,25.74 g/(kg·d),by raw material],with 8 rats in each
group. Except for normal group,other groups were given endotracheal injection of bleomycin to induce IPF model. On the second
day after modeling,normal group and model group were given water intrgastrically [10 mL/(kg·d)];administration groups were
given relevant medicine intragastrically,once a day,for consecutive 28 days. 24 h after last medication,the expression of
endothelial cell markers [platelet endothelial cell adhesion molecule 1,vascular endothelial cell cadherin] and interstitial cell markers
[α-smooth muscle actin,fibroblast specific protein 1] were detected by immunohistochemistry method. The expression of Notch4
and DLL4 in lung tissue of rats were detected by Western blotting assay. RESULTS:Compared with normal group,the expression
of endothelial cell markers were decreased significantly in lung tissue of model group,while the expressipon of interstitial cell
markers,Notch4 and DLL4 were increased significantly(P<0.01). Compared with model group,the expression of endothelial cell
markers in lung tissue of rats were increased significantly in administration groups,while Buyang huanwu decoction low-dose
group was significantly lower than dexamethasone group;the expression of interstitial cell markers,Notch4 and DLL4 were
decreased significantly,while Buyang huanwu decoction low-dose group was significantly higher than dexamethasone group(P<
0.05 or P<0.01). CONCLUSIONS:Buyang huanwu decoction can relieve IPF of model rats by intervening in EndMT,the
mechanism of which may be associated with inhibiting DLL4/Notch4 singaling pathway.
KEYWORDS Idiopathic pulmonary fibrosis;Buyang huanwu decoction;Endothelial-mesenchymal transformation;Endothelial
cell marker;Interstitial cell marker;DLL4/Notch4 singaling pathway;Mechanism;Rats
特 发 性 肺 纤 维 化(Idiopathic pulmonary fibrosis, 本课题组前期研究表明,补阳还五汤含药血清可一定程
IPF)是一种慢性纤维化性间质性肺炎,临床主要表现为 度上抑制人肺动脉内皮细胞的间质转化,这种作用可能
进行性呼吸困难或刺激性干咳,其病情呈持续性进展, 与调控Jagged1/Notch1通路的信号传导有关 。在此基
[11]
[1]
最终可导致患者呼吸衰竭而亡 。目前,IPF的发病机制 础上,本研究以EndMT为切入点,进一步探讨了补阳还
尚未完全阐明,肺泡上皮损伤后修复异常被认为是该病 五汤对IPF模型大鼠肺组织EndMT的影响,并从DLL4/
[2]
的主要发生机制 。但有研究表明,内皮间质转化(En- Notch4信号通路出发分析其可能机制,以期为阐明该方
dothelial-to-mesenchymal transition,EndMT)也是 IPF 发 剂防治IPF的作用机制提供参考。
[3]
生、发展的重要机制之一 。EndMT是指在特定的生理 1 材料
条件下,内皮细胞的形态由鹅卵石样转变为细长梭形, 1.1 仪器
同时其迁移能力和侵袭能力显著增强的病理过程。在 1510型多功能酶标仪(美国Thermo Fisher Scientific
此过程中,内皮细胞特异性标志物[如血管内皮细胞钙 公司);ChemiDoc TM XRS+型凝胶成像系统、PowerPac TM
黏 蛋 白(VE-cadherin)、血 小 板 内 皮 细 胞 黏 附 分 子 1 Basic 型电泳仪(美国 Bio-Rad 公司);BX53 型光学显微
(CD31)等]的表达逐渐减弱或丧失,而间质细胞的特异 镜(日本Olympus公司);RM2265型切片机、1150H型包
性标志物[如α-平滑肌肌动蛋白(α-SMA)、成纤维细胞特 埋机(德国 Leica 公司);Allegra X-30R 型离心机(美国
[4]
异性蛋白1(FSP-1)等]逐渐上调 。近期研究认为,包括 Beckman 公司);PL303 型电子天平[梅特勒-托利多(上
DLL4/Notch4 等在内的 Notch 信号通路在 EndMT 过程 海)仪器公司];WGL-65B 型电热鼓风干燥箱(天津市泰
[5]
中发挥着重要作用 。其中,Notch4 受体主要分布于血 斯特仪器有限公司);T10BS25型电动匀浆器(德国IKA
管内皮细胞中,DLL4 配体作为一种重要的血管生长发 公司)。
育调节因子,也主要在内皮细胞内表达,两者的特异性 1.2 药材、药品与试剂
结合可启动细胞内的信号传导,从而调节血管的发育、 生黄芪(批号:180108,产地:甘肃)、当归(批号:
成熟及稳定 [5-6] 。 171016,产地:甘肃)、赤芍(批号:161201,产地:甘肃)、
中医学理论认为,IPF的主要病机为气虚血瘀,益气 地龙(批号:170801,产地:广东)、川芎(批号:170701,产
[7]
活血是其基本治法 。补阳还五汤出自清代名医王清 地:四川)、桃仁(批号:171101,产地:山东)、红花(批号:
任的《医林改错》,是益气活血的代表方剂,可有效防治 170901,产地:新疆)等饮片均购自贵阳同仁堂药房,经
IPF 。现代药理研究表明,补阳还五汤能够通过抑制 贵州中医药大学药学院孙庆文教授鉴定,分别为豆科植
[8]
IPF 模型大鼠肺组织转化生长因子β 1 (TGF-β 1 )、高迁移 物蒙古黄芪[Astragalus membranaceus(Fisch.)Bge. var.
率族蛋白 B1(HMGB1)、α-SMA 等的过度表达,降低支 mongholicus(Bge.)Hsiao]的干燥根、伞形科植物当归
气管肺泡灌洗液中炎症因子的含量,减轻肺泡炎症反应, [Angelica sinensis(Oliv.)Diels]的干燥根、毛茛科植物芍
减少肺纤维化瘢痕形成,从而发挥抗肺纤维化作用 [9-10] 。 药(Paeonia lactiflora Pall.)的干燥根、钜引科动物参环
·2758 · China Pharmacy 2019 Vol. 30 No. 20 中国药房 2019年第30卷第20期