目的:分析急性肺损伤中IL-6与肺表面活性蛋白-A(surfactant protein A,SP-A)和SP-B的含量变化及其相互关系,探讨急性肺损伤的发病机制。方法:用Wistar大鼠复制油酸性急性肺损伤动物模型,在不同时间点收集急性肺损伤大鼠血清标本及肺泡...目的:分析急性肺损伤中IL-6与肺表面活性蛋白-A(surfactant protein A,SP-A)和SP-B的含量变化及其相互关系,探讨急性肺损伤的发病机制。方法:用Wistar大鼠复制油酸性急性肺损伤动物模型,在不同时间点收集急性肺损伤大鼠血清标本及肺泡灌洗液(bronchoalveo larlavage fluid,BALF),用放射免疫法测定血清细胞因子IL-6的动态变化;采用ELISA法检测BALF中SP-A、SP-B含量的变化。结果与结论:急性肺损伤后大鼠血清中细胞因子IL-6的分泌水平显著上升(P<0.05),而BALF中SP-A、SP-B含量显著降低,且血清中IL-6含量升高与BALF中SP-A、SP-B下降幅度呈显著负相关。结果提示急性肺损伤中IL-6分泌的升高与肺表面活性蛋白SP-A、SP-B含量的降低有显著的相关关系,炎症细胞因子IL-6可能通过影响SP-A、SP-B的表达产生致病作用。展开更多
Summary: Whether surfactant protein B (SP-B)-18A/C and 1580C/T polymorphism were associated with susceptibility to chronic obstructive pulmonary disease (COPD) in Chinese Han population was investigated. After genomi...Summary: Whether surfactant protein B (SP-B)-18A/C and 1580C/T polymorphism were associated with susceptibility to chronic obstructive pulmonary disease (COPD) in Chinese Han population was investigated. After genomic DNA was isolated from blood of COPD smokers and control smokers, the genotypes of SP-B-18A/C and SP-B1580C/T polymorphism loci were determined by polymerase chain reaction-restriction fragment length polymorphism analysis (PCR-RFLP) respectively. The results showed that there was significant difference in genotypes distribution frequency of SP-B1580C/T polymorphism locus between COPD smokers and control smokers. C→T mutation rate (including TT homozygote and CT heterozygote) in COPD smokers was higher than in control smokers (57.9 % vs 41.7 %, χ2=4.93, P<0.05), whereas there was no significant difference in genotypes distribution frequency of SP-B1580-18A/C locus between COPD smokers and control smokers. The allele frequency (29.1 %) of SP-B1580-18A/C locus is lower than T allele (70.9 %) in Chinese Han Population, and the distribution was different from that in Mexican, in which, the A and T allele frequencies were 85 % and 15 % respectively. It was concluded that SP-B1580 T allele was probably associated with increased susceptibility to COPD in Chinese Han population; The polymorphism of SP-B-18A/C locus maybe varied with race.展开更多
文摘目的:分析急性肺损伤中IL-6与肺表面活性蛋白-A(surfactant protein A,SP-A)和SP-B的含量变化及其相互关系,探讨急性肺损伤的发病机制。方法:用Wistar大鼠复制油酸性急性肺损伤动物模型,在不同时间点收集急性肺损伤大鼠血清标本及肺泡灌洗液(bronchoalveo larlavage fluid,BALF),用放射免疫法测定血清细胞因子IL-6的动态变化;采用ELISA法检测BALF中SP-A、SP-B含量的变化。结果与结论:急性肺损伤后大鼠血清中细胞因子IL-6的分泌水平显著上升(P<0.05),而BALF中SP-A、SP-B含量显著降低,且血清中IL-6含量升高与BALF中SP-A、SP-B下降幅度呈显著负相关。结果提示急性肺损伤中IL-6分泌的升高与肺表面活性蛋白SP-A、SP-B含量的降低有显著的相关关系,炎症细胞因子IL-6可能通过影响SP-A、SP-B的表达产生致病作用。
文摘Summary: Whether surfactant protein B (SP-B)-18A/C and 1580C/T polymorphism were associated with susceptibility to chronic obstructive pulmonary disease (COPD) in Chinese Han population was investigated. After genomic DNA was isolated from blood of COPD smokers and control smokers, the genotypes of SP-B-18A/C and SP-B1580C/T polymorphism loci were determined by polymerase chain reaction-restriction fragment length polymorphism analysis (PCR-RFLP) respectively. The results showed that there was significant difference in genotypes distribution frequency of SP-B1580C/T polymorphism locus between COPD smokers and control smokers. C→T mutation rate (including TT homozygote and CT heterozygote) in COPD smokers was higher than in control smokers (57.9 % vs 41.7 %, χ2=4.93, P<0.05), whereas there was no significant difference in genotypes distribution frequency of SP-B1580-18A/C locus between COPD smokers and control smokers. The allele frequency (29.1 %) of SP-B1580-18A/C locus is lower than T allele (70.9 %) in Chinese Han Population, and the distribution was different from that in Mexican, in which, the A and T allele frequencies were 85 % and 15 % respectively. It was concluded that SP-B1580 T allele was probably associated with increased susceptibility to COPD in Chinese Han population; The polymorphism of SP-B-18A/C locus maybe varied with race.
