慢性阻塞性肺疾病患者血浆及痰中P物质变化与其与肺？…

目的　探讨P物质 (SP)在慢性阻塞性肺疾病 (COPD)发病中的作用及其与肺功能的关系。方法　用放射免疫分析法观察 2 0名健康受试者 ,2 0例COPD患者血浆及痰中P物质的含量 ,同时检测肺功能 ,并分析血浆及痰中P物质的含量与一秒钟用力呼气容积占用力肺活量比值 (FEV1/FVC)的相关关系。结果　COPD患者血浆SP浓度 (8 6± 3 9)pmol/L明显高于对照组 (3 8± 2 0 )pmol/L(P <0 0 5 ) ;COPD患者痰SP浓度 (5 7 3± 14 5 )pmol/L明显高于对照组 (5 9± 2 6 )pmol/L(P <0 0 1)。COPD患者血浆SP浓度与FEV1/FVC呈负相关 (r=- 0 5 91,P <0 0 5 ) ;痰SP浓度与FEV1/FVC呈负相关 (r=- 0 6 42 ,P <0 0 5 )。结论　SP可能参与COPD的发病过程

Elevated substance P content in sputum and plasma in patients with COPD and its relationship with FEV 1/FVC

OBJECTIVE: To investigate the role of substance P(SP) of the nonadrenergic system within airways in the pathogenesis of COPD, and analyze the relationship between level of SP and FEV1/FVC in COPD patients. METHOD: SP concentration in sputum and plasma in 20 patients with COPD and 20 normal volunteers was examined and was measured by radioimmunoassay. RESULTS: The sputum SP concentration was significantly higher in patients with COPD (57.3 +/- 14.5) pmol/L than that in normal volunteers(5.9 +/- 2.6) pmol/L, P < 0.01, the plasma SP concentration was significantly higher in COPD patients (8.6 +/- 3.9) pmol/L than that in normal volunteers (3.8 +/- 2.0) pmol/L, P < 0.05. The plasma and sputum SP concentration correlated with FEV1/FVC in COPD patients (r = -0.591, r = -0.642, P < 0.05). CONCLUSION: These data suggest that neurogenic inflammation may be involved in the airway inflammation process and subsequent airway narrowing in COPD.