机构地区:[1]南方医科大学南方医院呼吸科,广州510515
出 处:《中华医学杂志》2012年第12期818-821,共4页National Medical Journal of China
基 金:国家自然科学基金(30971328);教育部高等学校博士学科点专项科研基金(20094433110011)
摘 要:目的探讨不同炎症表型哮喘患者治疗后血浆及诱导痰中抗菌肽LL-37水平的变化及其意义。方法研究对象为2009年8月至2010年8月南方医科大学南方医院初诊的34例非急性发作期哮喘患者(哮喘组)和同期14名行健康体检者(对照组)。所有研究对象均行外周血、诱导痰细胞分类,留取血浆、痰上清。根据诱导痰嗜酸粒细胞(EOS)计数将哮喘组分为EOS型(≥3%)及非EOS型(〈3%)。哮喘组采用布地奈德/福莫特罗(160/4.5I,zg,1吸,2次/d)治疗1个月后复查上述指标。应用酶联免疫吸附测定(ELISA)法检测哮喘组治疗前、后及对照组的血浆、痰上清液LL-37水平。结果治疗前哮喘组血浆、痰LL-37水平[数据以M(Q。)表示,下同][5.0(9.2)、28.4(109.8)μg/L]与对照组[2.4(11.4)、34.5(57.8)μg/L]差异无统计学意义(P=0.427、0.427),血浆LL-37水平与第1秒用力呼气容积(FEV1)、FEV1占预计值百分比(FEV1%预计值)、用力肺活量(FVC)呈负相关(r=-0.470、-0.421、-0.367,P=0.005、0.013、0.033)。治疗后哮喘组血浆、痰LL-37水平[5.6(16.2)、65.6(184.0)μg/L]高于治疗前(P=0.005、0.015),其中EOS型患者显著增高[5.3(19.3)比6.7(8.9)μg/L,P=0.021;65.6(185.2)比35.3(102.0)μg/L,P=0.014],而非EOS型患者无明显变化(P=0.139、0.386)。治疗后哮喘组血浆LL.37水平与FEV1、FEV1%预计值、FVC无显著相关性(P=0.283、0.706、0.272)。结论LL一37可能参与了哮喘病情的加重,而EOS型哮喘治疗后LL-37的增加可能与治疗解除了EOS炎症对LL一37表达的抑制有关,其机制有待进一步研究。Objective To explore the post-therapeutic change of eathelicidin LL-37 in asthmatics of different inflammatory phenotypes. Methods Thirty-four patients with initially diagnosed asthma (asthma group) and 14 normal subjects (control group) were recruited at Nanfang Hospital from August 2009 to August 2010 for this prospective study. Sputum and venous blood samples were collected and analyzed for cell differential. Eosinophilic asthma was defined as the count of sputum eosinophils 〉t 3%. The LL-37 concentrations in plasma and sputum supernatant were measured by enzyme-linked immunosorbent assay (ELISA) kit. The subjects were treated with budesonide/formoterol (160/4. 5 μg) one inhalation twice daily and re-examined after 1 month. Results Prior to treatment, there were no differences between the asthma and control groups in the levels of LL-37 in plasma and sputum supernatant ( P = 0. 427,0. 427 ). The plasma concentrations of LL-37 in asthma group were negatively correlated with baseline forced expiratory volume in one second ( FEV1 , r = - 0. 470, P = 0. 005 ), percent predicted of FEV1 ( FEV1% pred, r = - 0. 421, P = 0. 013) and forced vital capacity ( FVC, r = - 0. 367, P = 0. 033) . After treatment, the plasma and sputum supernatant concentrations of LL-37 (M (Qa)) in the asthma group (5.6(16. 2), 65.6 ( 184. 0 ) μg/L ) were significantly higher than those baseline concentrations (5.0(9. 2) , 28.4 ( 109. 8) μg/L, P = 0. 005, 0. 015 ) . In the eosinophilie asthma subgroup, the plasma and sputum supernatant concentrations of LL-37 ( M ( QR ) ) after treatment ( 5.3 ( 19.3 ), 65.6 ( 185.2 )μg/L) were significantly higher than those baseline concentrations ( 6. 7 ( 8.9 ), 35.3 ( 102. 0 ) μg/L, P = 0.021,0.014). And in the non-eosinophilic asthma subgroup, the changes of plasma and sputum supernatant concentrations of LL-37 showed no significant differences (P = 0. 139, 0. 386). In the asthma group, the correlat
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