摘要
背景:最近许多研究表明,炎症细胞因子与骨质疏松症和骨密度之间存在密切关系,然而炎症细胞因子与骨密度之间的因果关系尚未完全揭示。目的:采用两样本孟德尔随机化方法探究炎症细胞因子与骨密度之间潜在的因果关系。方法:从全基因组关联研究(GWAS)公开数据库中筛选出与41种循环炎症细胞因子相关的单核苷酸多态性作为工具变量。骨密度的GWAS汇总数据来自骨质疏松症遗传因素联盟(GEFOS),共涉及32735名欧洲血统的个体。逆方差加权法作为主要的分析方法来评估因果效应,加权中位数法、MR Egger回归法、简单中位数法和加权中值方法用于补充说明。利用MR-Egger Intercept和MR-PRESSO分析方法进行多效性检验,采用Cochran’s Q检验结果是否存在异质性,同时使用留一法评估结果的稳定性。另外,为了更准确地评估因果关系,采用Bonferroni校正来确定与骨密度有强因果关系的炎症细胞因子。结果与结论:①逆方差加权法分析结果显示,白细胞介素8与腰椎骨密度之间呈正向因果关系(β=0.075,95%CI:0.033-0.117,P=0.0005),白细胞介素17与腰椎骨密度之间呈负向因果关系(β=-0.083,95%CI:-0.152至-0.014,P=0.018),肿瘤坏死因子b与股骨颈骨密度之间可能存在负向因果效应(β=-0.053,95%CI:-0.088至-0.018,P=0.003),碱性成纤维细胞生长因子与股骨颈骨密度之间可能存在正向因果关系(β=0.085,95%CI:0.016-0.154,P=0.015),巨噬细胞炎症蛋白1a与全身骨密度之间可能存在负向因果效应(β=-0.056,95%CI:-0.105至-0.007,P=0.025),白细胞介素5、基质衍生因子1a、肝细胞生长因子、白细胞介素4与足跟骨密度之间存在负向因果效应(β=-0.019,95%CI:-0.031至-0.006,P=0.004;β=-0.022,95%CI:-0.038至-0.005,P=0.010;β=-0.021,95%CI:-0.041至-0.002,P=0.030;β=-0.016,95%CI:-0.032至-0.001,P=0.034),神经生长因子、粒细胞集落刺激因子与足跟骨密度之间存在正向因果关系(β=0.019,95%CI:0.002-0.036,P=0.033;β=0.011,95%CI:0.000-0.022,P=0.050);经Bonferroni校正后发现,白细胞介素8与腰椎骨密度之间有强正向因果效应(P=0.0005)。MR Egger法、加权中位数法、简单中位数法和加权中值法分析结果方向一致。②敏感性分析结果显示,循环炎症细胞因子对骨密度的因果效应没有异质性、多效性或异常值。
BACKGROUND:Many recent studies have shown a close relationship between inflammatory cytokines and osteoporosis and bone mineral density(BMD).However,the causal relationship between inflammatory cytokines and BMD has not been fully revealed.OBJECTIVE:To explore the potential causal relationship between inflammatory cytokines and BMD using a two-sample Mendelian randomization analysis.METHODS:The single nucleotide polymorphisms associated with 41 circulating inflammatory cytokines were selected from the open database of genomewide association studies(GWAS)as instrumental variables.The GWAS data about BMD were from the Genetic Factors for Osteoporosis Consortium,involving a total of 32735 individuals of European ancestry.Inverse variance weighting was used as the primary analysis to evaluate the causal effect.Weighted median,MR Egger regression,simple mode,and weighted mode methods were used to supplement the explanation.We used the MR-Egger intercept and MR-PRESSO method to conduct a pleiotropy test,the Cochran’s Q test was used to determine whether there was heterogeneity in the results,and the leave-one-out method was used to evaluate the stability of the results.In addition,to more accurately assess the causality,the Bonferroni-corrected test was used to identify inflammatory cytokines that have a strong causal relationship with BMD.RESULTS AND CONCLUSION:(1)According to the results of the inverse variance weighting method,we found a positive causal relationship between interleukin-8 and lumbar spine BMD[β=0.075,95%confidence interval(CI):0.033-0.117,P=0.0005),while a negative causal relationship between interleukin-17 and lumbar spine BMD(β=-0.083,95%CI:-0.152 to-0.014,P=0.018).There might be a negative causal relationship between tumor necrosis factor b and femoral neck BMD(β=-0.053,95%CI:-0.088 to-0.018,P=0.003),while a positive causal relationship between basic fibroblast growth factor and femoral neck BMD(β=0.085,95%CI:0.016-0.154,P=0.015).There might be a negative causal relationship between macrophage inflammatory protein-1a and total body BMD(β=-0.056,95%CI:-0.105 to-0.007,P=0.025).There was a negative causal relationship between interleukin-5(β=-0.019,95%CI:-0.031 to-0.006,P=0.004),stromal cell-derived factor-1a(β=-0.022,95%CI:-0.038 to-0.005,P=0.010),hepatocyte growth factor(β=-0.021,95%CI:-0.041 to-0.002,P=0.030),interleukin-4(β=-0.016,95%CI:-0.032 to-0.001,P=0.034)and heel BMD,while a positive causal relationship between nerve growth factor(β=0.019,95%CI:0.002-0.036,P=0.033),granulocyte colony-stimulating factor(β=0.011,95%CI:0.000-0.022,P=0.050),and heel BMD.Meanwhile,after the Bonferroni-corrected test,there was a strong positive causal effect between interleukin-8 and lumbar spine BMD(P=0.0005).And consistent directional effects for all analyses were observed in MR Egger,weighted median,simple mode,and weighted mode methods.(2)Sensitivity analyses revealed no heterogeneity,pleiotropy,or outliers for the causal effect of circulating inflammatory cytokines on BMD.
作者
陈帅
金杰
韩化伟
田宁晟
李志伟
Chen Shuai;Jin Jie;Han Huawei;Tian Ningsheng;Li Zhiwei(Department of Orthopaedics,The Second Affiliated Hospital of Nanjing University of Chinese Medicine(Jiangsu Second Hospital of Traditional Chinese Medicine),Nanjing 210017,Jiangsu Province,China)
出处
《中国组织工程研究》
CAS
北大核心
2025年第8期1556-1564,共9页
Chinese Journal of Tissue Engineering Research
基金
江苏省科技计划专项资金重点研发计划社会发展项目(BE2023787),项目负责人:李志伟
江苏省卫生健康委员会老年健康科研项目(LKZ2022008),项目负责人:李志伟。
关键词
骨质疏松
骨密度
炎症细胞因子
孟德尔随机化
因果关系
osteoporosis
bone mineral density
inflammatory cytokine
Mendelian randomization
causality
