目的:本次研究通过检测类风湿关节炎(RA)患者外周血单核细胞亚群比例及其分泌促炎细胞因子的功能,探讨单核细胞亚群在RA发病过程中的作用。方法:22例RA患者(RA组)和22例健康对照者(HC组),经知情同意后抽取3ml静脉血,肝素钠抗凝。流式细...目的:本次研究通过检测类风湿关节炎(RA)患者外周血单核细胞亚群比例及其分泌促炎细胞因子的功能,探讨单核细胞亚群在RA发病过程中的作用。方法:22例RA患者(RA组)和22例健康对照者(HC组),经知情同意后抽取3ml静脉血,肝素钠抗凝。流式细胞术(FCM)检测单核细胞亚群比例、中间型单核细胞表面HLA-DR、Toll样受体2(TLR2)和髓系细胞触发受体-1(TREM-1)表达,及其细胞内肿瘤坏死因子(TNF)-α平均荧光强度(MFI),并分析RA患者单核细胞亚群比例与血清细胞因子的相关性。正态数据分析采用Students't-test检验。结果:与HC组相比,RA组中间型单核细胞比例升高[(4.6±1.2)%vs(11.7±1.6)%],差异有统计学意义(P<0.05);HLA-DR表达(MFI)与HC组比较差异无统计学意义(26.8±8.6 vs 30.2±6.1,P>0.05)。RA组TLR2(750.2±110.3 vs 526.8±98.6)、TREM-1(58.4±12.1 vs 40.3±10.2)表达(MFI)高于HC组,差异均有统计学意义(P<0.05);RA组中间型单核细胞胞内TNF-α(46.3±6.4 vs 36.7±8.3)MFI高于HC组,差异有统计学意义(P<0.05)。RA患者中间型单核细胞比例与DAS28评分和血清TNF-α、白细胞介素(IL)-17呈正相关,相关系数分别为0.593(P=0.003)、0.471(P=0.027)和0.538(P=0.009)。结论:RA患者外周血单核细胞向中间型极化,并处于活化状态,高表达TLR2和TREM-1,分泌较多的促炎细胞因子TNF-α,参与RA的疾病过程。因此,抑制单核细胞向中间型极化或阻断表面受体表达可能是治疗RA的新途径。展开更多
BACKGROUND: Triggering receptor expressed on myeloid cells-1(TREM-1) is a cell surface receptor expressed on neutrophils and monocytes. TREM-1 acts to amplify infl ammation and serves as a critical mediator of infl am...BACKGROUND: Triggering receptor expressed on myeloid cells-1(TREM-1) is a cell surface receptor expressed on neutrophils and monocytes. TREM-1 acts to amplify infl ammation and serves as a critical mediator of infl ammatory response in the context of sepsis. To date, the predisposition of TREM-1 gene polymorphisms to septic shock has not been reported. This study was designed to investigate whether TREM-1 genomic variations are associated with the development of septic shock.METHODS: We genotyped two TREM-1 single nucleotide polymorphisms(SNPs, rs2234237 and rs2234246) and evaluated the relationships between these SNPs and septic shock on susceptibility and prognosis.RESULTS: TREM-1 rs2234246 A allele in the promoter region was signifi cantly associated with the susceptibility of septic shock in recessive model(AA, OR=3.10, 95%CI 1.15 to 8.32, P=0.02), and in codominant model(AG, OR=0.72, 95%CI 0.43–1.19, P=0.02; AA, OR=2.71, 95%CI 1.00–7.42; P=0.03). However, in three inherited models(dominant model, recessive model, and codominant model), none of the assayed loci was signif icantly associated with the prognosis of septic shock. The nonsurvivor group demonstrated higher plasma IL-6 levels(99.7±34.7 pg/mL vs. 61.2±26.5 pg/mL, P<0.01) than the survivor group. Plasma concentrations of IL-6 among the three genotypes of rs2234246 were AA 99.4±48.9 pg/m L, AG 85.4±43 pg/m L, and GG 65.3±30.7 pg/m L(P<0.01). The plasma concentrations of IL-6 in patients with AA genotypes were signifi cantly higher than those in patients with GG genotypes(P<0.01).CONCLUSION: TREM-1 genetic polymorphisms rs2234246 may be significantly correlated only with susceptibility to septic shock in the Chinese Han population.展开更多
文摘目的:本次研究通过检测类风湿关节炎(RA)患者外周血单核细胞亚群比例及其分泌促炎细胞因子的功能,探讨单核细胞亚群在RA发病过程中的作用。方法:22例RA患者(RA组)和22例健康对照者(HC组),经知情同意后抽取3ml静脉血,肝素钠抗凝。流式细胞术(FCM)检测单核细胞亚群比例、中间型单核细胞表面HLA-DR、Toll样受体2(TLR2)和髓系细胞触发受体-1(TREM-1)表达,及其细胞内肿瘤坏死因子(TNF)-α平均荧光强度(MFI),并分析RA患者单核细胞亚群比例与血清细胞因子的相关性。正态数据分析采用Students't-test检验。结果:与HC组相比,RA组中间型单核细胞比例升高[(4.6±1.2)%vs(11.7±1.6)%],差异有统计学意义(P<0.05);HLA-DR表达(MFI)与HC组比较差异无统计学意义(26.8±8.6 vs 30.2±6.1,P>0.05)。RA组TLR2(750.2±110.3 vs 526.8±98.6)、TREM-1(58.4±12.1 vs 40.3±10.2)表达(MFI)高于HC组,差异均有统计学意义(P<0.05);RA组中间型单核细胞胞内TNF-α(46.3±6.4 vs 36.7±8.3)MFI高于HC组,差异有统计学意义(P<0.05)。RA患者中间型单核细胞比例与DAS28评分和血清TNF-α、白细胞介素(IL)-17呈正相关,相关系数分别为0.593(P=0.003)、0.471(P=0.027)和0.538(P=0.009)。结论:RA患者外周血单核细胞向中间型极化,并处于活化状态,高表达TLR2和TREM-1,分泌较多的促炎细胞因子TNF-α,参与RA的疾病过程。因此,抑制单核细胞向中间型极化或阻断表面受体表达可能是治疗RA的新途径。
基金supported by Science&Technology Pillar Program of Guangdong Province(2009BAI86B03)
文摘BACKGROUND: Triggering receptor expressed on myeloid cells-1(TREM-1) is a cell surface receptor expressed on neutrophils and monocytes. TREM-1 acts to amplify infl ammation and serves as a critical mediator of infl ammatory response in the context of sepsis. To date, the predisposition of TREM-1 gene polymorphisms to septic shock has not been reported. This study was designed to investigate whether TREM-1 genomic variations are associated with the development of septic shock.METHODS: We genotyped two TREM-1 single nucleotide polymorphisms(SNPs, rs2234237 and rs2234246) and evaluated the relationships between these SNPs and septic shock on susceptibility and prognosis.RESULTS: TREM-1 rs2234246 A allele in the promoter region was signifi cantly associated with the susceptibility of septic shock in recessive model(AA, OR=3.10, 95%CI 1.15 to 8.32, P=0.02), and in codominant model(AG, OR=0.72, 95%CI 0.43–1.19, P=0.02; AA, OR=2.71, 95%CI 1.00–7.42; P=0.03). However, in three inherited models(dominant model, recessive model, and codominant model), none of the assayed loci was signif icantly associated with the prognosis of septic shock. The nonsurvivor group demonstrated higher plasma IL-6 levels(99.7±34.7 pg/mL vs. 61.2±26.5 pg/mL, P<0.01) than the survivor group. Plasma concentrations of IL-6 among the three genotypes of rs2234246 were AA 99.4±48.9 pg/m L, AG 85.4±43 pg/m L, and GG 65.3±30.7 pg/m L(P<0.01). The plasma concentrations of IL-6 in patients with AA genotypes were signifi cantly higher than those in patients with GG genotypes(P<0.01).CONCLUSION: TREM-1 genetic polymorphisms rs2234246 may be significantly correlated only with susceptibility to septic shock in the Chinese Han population.
