哮喘患者外周血单核细胞超氧化的过氧化物氧化还原酶与哮喘严重程度相关
2012/02/29
摘要
目的:氧化应激参与哮喘的致病。过氧化物氧化还原酶(PRDX)对于控制细胞内氧化应激至关重要。本研究在哮喘患者中评价PRDX及其超氧化形式的表达。
主要方法:检测哮喘患者和对照者外周血单核细胞(PBMCs)PRDX1、PRDX2、PRDX3、PRDX6和其超氧化形式PRDX-SO3的表达。此外,收集这些受试者的PBMCs,采用过氧化氢(H2O2)处理后,检测细胞内的活性氧(ROS)。
主要结果:哮喘患者PBMCs内超氧化PRDX与总PRDX(PRDX-SO3/PRDX)比值显著高于对照者,而且与疾病的严重程度相关,严重哮喘患者该比值最高。此外,PBMCs在H2O2处理后,细胞内ROS显著增加,特别是在淋巴细胞,而且哮喘患者ROS的增加幅度及其持续时间显著大于对照者。
临床意义:PRDX的超氧化可作为哮喘严重程度的一个生物标志物,可用于预测哮喘患者PBMCs氧化应激易感性增加。
(陈欣 审校)
Life Sci. 2012 Jan 20. [Epub ahead of print]
Hyperoxidized peroxiredoxins in peripheral blood mononuclear cells of asthma patients is associated with asthma severity.
Kwon HS, Bae YJ, Moon KA, Lee YS, Lee T, Lee KY, Kim TB, Park CS, Moon HB, Cho YS.
Source
Department of Allergy and Clinical Immunology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea.
Abstract
AIMS: Oxidative stress is involved in the pathogenesis of asthma, and peroxiredoxins (PRDX) may be critical in controlling intracellular oxidative stress. The aim of this study was to evaluate expressions of PRDX and their hyperoxidized forms in asthmatic individuals.
MAIN METHODS: The levels of expression of PRDX1, PRDX2, PRDX3, and PRDX6 and their hyperoxidized forms (PRDX-SO(3)) were measured in PBMCs from asthma patients and control subjects. In addition, cells from these subjects were treated with hydrogen peroxide (H(2)O(2)) and their intracellular concentrations of reactive oxygen species (ROS) were measured.
KEY FINDINGS: The ratios of hyperoxidized to total PRDX (PRDX-SO(3/)PRDX) in PBMCs were significantly higher in asthma patients than in normal subjects and were correlated with disease severity, with the highest ratio seen in patients with severe asthma. Furthermore, H(2)O(2) treatment of PBMCs, particularly lymphocytes, increased intracellular ROS concentrations with greater and more persistent increases observed in cells from asthmatic than from control subjects.
SIGNIFICANCE: Hyperoxidation of PRDX may serve as a biomarker of asthma severity and may predict enhanced susceptibility to oxidative stress load in PBMCs of asthmatics.
Life Sci. 2012 Jan 20. [Epub ahead of print]
上一篇:
采用聚类分析初级医疗机构哮喘发作的特征
下一篇:
淋巴细胞计数全基因组关联研究联合基因表达数据分析揭示新的哮喘候选基因