CD40-CD40L系统与儿童肥胖的相关性

Association between CD40-CD40L system and obesity in children

摘要:

目的 探讨CD40-CD40L系统与儿童肥胖的相关性。方法 选取肥胖儿童76例为肥胖组，同时选取体重指数（BMI）正常的74例儿童为对照组。比较两组儿童形态学指标和生化指标，以及血清CD40和CD40L水平，并采用偏相关分析和多元线性回归分析研究肥胖组儿童CD40和CD40L与其他临床指标的相关性。结果 肥胖组BMI、腰围/身高之比、收缩压、舒张压、丙氨酸氨基转移酶（ALT）、天门冬氨酸氨基转移酶（AST）、尿酸、三酰甘油、载脂蛋白B、空腹血糖、空腹胰岛素、糖化血红蛋白、血小板计数、CD40L及平均颈动脉内膜中层厚度均高于对照组（P < 0.05），而高密度脂蛋白胆固醇和载脂蛋白A1均低于对照组（P < 0.05）。以年龄和性别为控制因素，偏相关分析显示，CD40L与身高、体重、BMI、舒张压、胆汁酸、甘油三酯、总胆固醇、低密度脂蛋白胆固醇、载脂蛋白B及血小板计数呈正相关（P < 0.05）；CD40与腰围/身高之比和血小板计数呈正相关（P < 0.05）。多元线性回归分析显示，ALT、AST、总胆固醇、血小板计数是CD40L水平的独立影响因素（R²=0.266，P < 0.05）。结论 CD40-CD40L系统与肥胖及肥胖相关的血脂紊乱和高血压密切相关，CD40和CD40L可能成为代谢综合征早期预警的新指标，为相关慢性病的防治提供新思路。

Abstract:

Objective To study the association between CD40-CD40L system and obesity in children. Methods A total of 76 obese children were enrolled as the obese group, and 74 healthy children with normal body mass index (BMI) were enrolled as the control group. The two groups were compared in terms of morphological indices, biochemical parameters, and serum levels of CD40 and CD40L. Partial correlation analysis and multivariate linear regression analysis were performed to investigate the correlation of CD40 and CD40L with other clinical indices. Results Compared with the control group, the obese group had significantly higher BMI, waist circumference/height ratio, systolic pressure, diastolic pressure, alanine aminotransferase (ALT), aspartate aminotransferase (AST), uric acid, triglyceride, apolipoprotein B, fasting blood glucose, fasting insulin, glycosylated hemoglobin, platelet count, CD40L, and mean carotid intima-media thickness (P < 0.05), but significantly lower high-density lipoprotein cholesterol and apolipoprotein A1 (P < 0.05). With age and sex as the control factors, the partial correlation analysis showed that CD40L was positively correlated with height, weight, BMI, diastolic pressure, bile acid, triglyceride, total cholesterol, lowdensity lipoprotein cholesterol, apolipoprotein B, and platelet count (P < 0.05). CD40 was positively correlated with waist circumference/height ratio and platelet count (P < 0.05). The multivariate linear regression analysis showed that ALT, AST, total cholesterol, and platelet count were the dependent factors influencing the level of CD40L (R²=0.266, P < 0.05). Conclusions CD40-CD40L system is closely associated with obesity and related hyperlipidemia and hypertension. CD40 and CD40L may be used as new indicators for early warning of metabolic syndrome and provide new ideas for the prevention and treatment of related chronic diseases.