肿瘤坏死因子及转化生长因子在肺间质病变发病机制中的作用

目的 了解肿瘤坏死因子(TNF)-α及转化生长因子(TGF)-β在结缔组织病相关的肺间质病变(CTD-ILD)发病过程中的作用.方法 提取患者肺组织及外周血单个核细胞(PBMCs)总mRNA,通过反转录聚合酶链反应(RT-RCR)法检测TNF-α mRNA,TGF-β mRNA相对含量;通过酶联免疫吸附试验(ELISA)法测定患者血清的TNF-α、TGF-β含量及血清纤维化指标--透明质酸(HA),并分析其与影像学类型和病理类型的关系.结果 肺组织病理改变以纤维化为主的患者肺脏组织及PBMCs中TGF-β mRNA明显升高.血清TGF-β含量及血清HA亦明显升高,而TNF-α在肺组织及PBMCs中未见明显升高.结论 肺组织和PBMCs中TGF-β mRNA、血清TGF-β及HA在肺纤维化发生中起作用,其指标的测定有助于帮助了解肺组织纤维化的程度.

The role of inflammation and fibrosis cytokines in the pathogenesis of interstitial lung disease

Objective To study the role of tumor necrosis factor-alpha (TNF-α) and transforming growth factor-beta (TGF-β) in CTD-IDL. Methods mRNAs were extracted from lung tissues and perip-heral blood mononaclear cells (PBMCs) of CTD-ILD patients. RT-PCR was deployed to detect the percentages of TNF-α mRNA, TGF-β mRNAs; and the percentage of TNF-α, TGF-β and fibrosing parameters (hyaluronic acid, HA) was tested in serum by ELISA. The relationship between above laboratory data and image as well as pathological characteristics were analyzed. Results The percentage of TGF-β mRNA in lung tissue and PBMCs. As well as the serum TGF-β and HA increased significantly in those with interstitial lung diseases. On the other hand, the percentage of TNF-α mRNA of these patients did not increase in lung tissues and PBMCs. Conclusion TGF-β plays a role in lung interstitial fibrosis. It may be helpful to understand the degree of fibrosis in lung tissue by detecting lung tissue/PBMCs TGF-β mRNA, serum TGF-β and other fibrosis indicators.