摘要
目的探讨调节性B细胞（Breg）在天疱疮发病中的免疫介导机制。方法以CD19^＋CD24^hiCD38^hi作为Breg标记，流式细胞仪检测48例天疱疮患者及20例健康人外周血中Breg占CD19^＋B细胞的比例，观察不同严重程度患者的Breg比例变化趋势。采用ELISA法检测患者血清中特异性抗Dsg1、Dsg3抗体滴度、亚型，分析其与Breg比例的相关性。结果天疱疮患者外周血Breg占CDf19＋B细胞的比例（11．54％±0．97％）与健康对照组（8．19％±0．85％）相比差异有统计学意义（P=0．04），且急性期轻度患者该比例（5．17％±2．14％）与中度患者（11．38％±5．30％，P=0．042）、重度患者（11．17％±5．31％，P=0．046）相比，差异均有统计学意义；Breg比例与抗Dsgl抗体亚型IgG4以及IgG4／IgG1的比值均呈正相关（r值分别为0．527，0．565，P值均〈0．01）。结论Breg主要和抗体产生以及疾病活动相关，但其具体的作用机制尚待研究。
Objective To explore the mechanisms underlying the mediating effect of regulatory B （Breg） cells in the pathogenesis of pemphigus. Methods Peripheral blood specimens were collected from 48 patients with pemphigus at different degrees of severity and 20 healthy controls. Flow cytometry was conducted to analyze the frequency of Breg （CDI9±CD24hiCD38hi） cells in peripheral CD19^＋ B cells, enzyme linked immunosorbent assay （ELISA） to determine the titer and subtypes of anti-desmoglein （Dsg） 1 and 3 antibodies in sera from these subjects. The relationship of anti-Dsg 1 and 3 antibodies with the frequency of Breg cells was assessed by Spearman＇s rank correlation test. Results Significant differences were observed in the proportion of Breg ceils in CD19^＋ B cells between patients with pemphigus and healthy controls （11.54% ± 0.97% vs. 8.19% ± 0.85%, P = 0.04）, as well as between patients with acute mild pemphigus and those with moderate and severe pemphigus （5.17% ± 2.14% vs. 11.38% ± 5.30% and 11.17% ± 5.31%, P = 0.042, 0.046, respectively）. The frequency of Breg cells was positively correlated with the absorbance value for anti-Dsgl antibodies of IgG4 subclass and IgG4/IgG1 ratio（r = 0.527, 0.565, respectively, both P 〈 0.01 ）. Conclusions Breg cells are mainly associated with the production of antibodies in and disease severity of pemphigus, while the actual mechanism of action remains unknown.
出处
《中华皮肤科杂志》
CAS
CSCD
北大核心
2012年第11期771-773,共3页
Chinese Journal of Dermatology
基金
国家自然科学基金面上项目（81171499）
上海市科委科研计划项目（10JC1410600）
关键词
天疱疮
B淋巴细胞
抗体
Pemphigus
B lymphocytes
Antibodies
