戊糖素在哮喘患者年龄相关和疾病相关的肺功能损伤中的作用
2011/03/28
背景:目前已经了解,戊糖素是晚期糖化终产物的一种分子间交联型,在许多结缔组织中,随着年龄增长不断累积。
目的:研究戊糖素是否参与了哮喘患者年龄相关和疾病相关的肺功能损伤。
方法:检测年轻至老年哮喘患者诱导痰液中的戊糖素,评价单次呼吸中氮气洗脱曲线的氮肺泡平台的斜率(delta N2)、闭合容积(CV)、闭合容量(CC)。
结果:与正常对照相比,哮喘患者诱导痰液的戊糖素水平显著增加(分别为20.1[16.7-26.5 ng/mL]和3.0[0.7-7.5 ng/mL],P<0.001)。在正常组和哮喘组,戊糖素水平与年龄相关。然而,哮喘患者戊糖素水平随年龄增长而出现的斜率增加,显著大于正常受试者。在正常受试者和哮喘患者中,CV/肺活量、CC/肺总容量和delta N2随着年龄增长而增加。此外,各年龄层次(21-40, 41-60, 61-80岁)哮喘患者的CV/肺活量、CC/肺总容量和delta N2显著高于正常对照者。同时,哮喘患者的戊糖素水平与这些指标显著相关。
结果:我们的结果显示,正常对照和哮喘患者诱导痰的戊糖素水平与小气道功能相关,小气道功能相关年龄相关。此外,戊糖素水平随年龄增长而增加,在哮喘患者更为明显。这些结果为老年患者的哮喘病理生理学研究开启新的时代。
(刘国梁 审校)
J Allergy Clin Immunol. 2011 Jan 6. [Epub ahead of print]
Potential roles of pentosidine in age-related and disease-related impairment of pulmonary functions in patients with asthma.
Kanazawa H, Tochino Y, Kyoh S, Ichimaru Y, Asai K, Hirata K.
Department of Respiratory Medicine, Graduate School of Medicine, Osaka City University, Osaka, Japan.
Abstract
BACKGROUND: Pentosidine is well established as an intermolecular cross-linking type of advanced glycation end products, and it accumulates with aging in various connective tissues.
OBJECTIVE: To determine whether pentosidine contributes to age-related and disease-related impairment of pulmonary functions in patients with asthma.
METHODS: We measured pentosidine levels in induced sputum from young to elderly patients with asthma and assessed the slope of the nitrogen (N(2)) alveolar plateau (delta N(2)), closing volume (CV), and closing capacity (CC) from a nitrogen washout curve in a single breath.
RESULTS: Pentosidine levels in induced sputum were significantly higher in patients with asthma than in normal controls (patients with asthma: median, 20.1, interquartile range, 16.7-26.5 ng/mL; normal controls: median, 3.0, interquartile range, 0.7-7.5 ng/mL; P < .001). The levels were closely correlated with age in both normal controls and patients with asthma. However, the slope of age-related increase in pentosidine levels was markedly steeper in patients with asthma than in normal controls. CV/vital capacity, CC/total lung capacity, and delta N(2) increased with aging in both normal controls and patients with asthma. Moreover, in each range of age (21-40, 41-60, 61-80 years), CV/vital capacity, CC/total lung capacity, and delta N(2) were significantly higher in patients with asthma than in normal controls. In addition, pentosidine levels in patients with asthma were closely correlated with each of these variables.
CONCLUSION: Our results demonstrated the association between sputum levels of pentosidine and age-related small airways function in both normal controls and patients with asthma. Moreover, the age-related increase in pentosidine levels was more pronounced in patients with asthma. These findings will herald new era in the pathophysiology of elderly asthma.
J Allergy Clin Immunol. 2011 Jan 6. [Epub ahead of print]
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基于诱导痰液样本的基因表达谱,定义哮喘的转录表型
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在秘鲁利马城郊棚户区研究与繁忙街道的距离对哮喘和过敏症的影响