目的:探讨慢性乙型肝炎患者外周血中CD11c+髓样树突状细胞(mDC)相对数量和细胞表型的变化,以及与HBV持续感染之间的关系.方法:2007-03/2007-10瑞金医院感染科住院及门诊慢性乙型肝炎患者28例,另设健康对照组21例(均为本院职工).流式细...目的:探讨慢性乙型肝炎患者外周血中CD11c+髓样树突状细胞(mDC)相对数量和细胞表型的变化,以及与HBV持续感染之间的关系.方法:2007-03/2007-10瑞金医院感染科住院及门诊慢性乙型肝炎患者28例,另设健康对照组21例(均为本院职工).流式细胞分析技术检测受试者外周血mDC的百分比数.磁珠分选方法分离纯化mDC,流式细胞仪检测mDC表面共刺激分子CD80和CD86.结果:与健康对照组相比,慢性乙肝患者CD11c+mDC占外周血单个核细胞的频数明显降低,差异有统计学意义(0.38%±0.61% vs 0.77%±0.56%,P<0.05).慢性乙肝患者外周血mDC频数与血清ALT水平、病毒载量呈负相关(r=-0.374,-0.435,均P<0.05),患者组不同肝脏炎症程度mDC频数存在差异.新鲜分离的mDC表面共刺激分子CD80和CD86表达较低,但患者组CD86的表达明显高于正常对照组,差异有统计学意义(45.26%±21.54% vs 18.71%±10.93%,P<0.05).结论:慢性乙型肝炎患者外周血CD11c+mDC亚群百分比降低,但mDC表面共刺激分子表达率并未严重受损,外周血中CD11c+mDC数量减少可能与血清病毒载量及肝脏炎症程度相关.展开更多
Background: Breakdown of tolerance against the commensal microflora is believ ed to be a major factor in the pathogenesis of inflammatory bowel disease (IBD). Dendritic cells (DC) have been implicated in this process ...Background: Breakdown of tolerance against the commensal microflora is believ ed to be a major factor in the pathogenesis of inflammatory bowel disease (IBD). Dendritic cells (DC) have been implicated in this process in various animal mod els, but data on human DC in IBD are very limited. Aim: To characterise plasmacy toid DC (PDC) and myeloid DC (MDC) in patients with active versus inactive IBD a nd healthy controls. Patients and Methods: Peripheral blood was obtained from 10 6 patients (Crohn’ s disease (CD) n = 49, ulcerative colitis (UC) n = 57) and h ealthy controls (n = 19). Disease activity was scored using themodified Truelove Witts (MTWSI) for UC and the Harvey Bradshaw severity indices (HBSI) for CD. Fo ur colour flow cytometric analysis was used to identify, enumerate, and phenotyp e DC. DC from patients with acute flare ups and healthy controls were cultured a nd stimulated with CpG ODN 2006 or lipopolysaccharide (LPS). Results: IBD patien ts in remission (PDC UC, 0.39% ; CD, 0.35% ; MDC- 1 UC, 0.23% ; CD, 0.22% of PBMC) have slightly lower numbers of circulating DC compared with healthy con trols (PDC 0.41% , MDC- 1 0.25% of PBMC). In acute flare ups IBD patients ex perience a significant drop of DC (PDC UC, 0.04% ; CD, 0.11% ; MDC- 1 UC, 0.1 1% ; CD, 0.14% of PBMC) that correlates with disease activity (correlation co efficients: PDC MTWSI, 0.93; HBSI, 0.79; MDC- 1 MTWSI, 0.75; HBSI, 0.81). Moreo ver, both express α l4β 7 integrin and display an immature phenotype. Freshly isolated PDC and MDC- 1 from untreated flaring IBD patients express higher base line levels of CD86 which increases further in culture and upon stimulation comp ared with healthy controls. Conclusion: IBD patients lack immature blood DC duri ng flare ups which possibly migrate to the gut. An aberrant response to microbia l surrogate stimuli suggests a disturbed interaction with commensals.展开更多
文摘目的:探讨慢性乙型肝炎患者外周血中CD11c+髓样树突状细胞(mDC)相对数量和细胞表型的变化,以及与HBV持续感染之间的关系.方法:2007-03/2007-10瑞金医院感染科住院及门诊慢性乙型肝炎患者28例,另设健康对照组21例(均为本院职工).流式细胞分析技术检测受试者外周血mDC的百分比数.磁珠分选方法分离纯化mDC,流式细胞仪检测mDC表面共刺激分子CD80和CD86.结果:与健康对照组相比,慢性乙肝患者CD11c+mDC占外周血单个核细胞的频数明显降低,差异有统计学意义(0.38%±0.61% vs 0.77%±0.56%,P<0.05).慢性乙肝患者外周血mDC频数与血清ALT水平、病毒载量呈负相关(r=-0.374,-0.435,均P<0.05),患者组不同肝脏炎症程度mDC频数存在差异.新鲜分离的mDC表面共刺激分子CD80和CD86表达较低,但患者组CD86的表达明显高于正常对照组,差异有统计学意义(45.26%±21.54% vs 18.71%±10.93%,P<0.05).结论:慢性乙型肝炎患者外周血CD11c+mDC亚群百分比降低,但mDC表面共刺激分子表达率并未严重受损,外周血中CD11c+mDC数量减少可能与血清病毒载量及肝脏炎症程度相关.
文摘Background: Breakdown of tolerance against the commensal microflora is believ ed to be a major factor in the pathogenesis of inflammatory bowel disease (IBD). Dendritic cells (DC) have been implicated in this process in various animal mod els, but data on human DC in IBD are very limited. Aim: To characterise plasmacy toid DC (PDC) and myeloid DC (MDC) in patients with active versus inactive IBD a nd healthy controls. Patients and Methods: Peripheral blood was obtained from 10 6 patients (Crohn’ s disease (CD) n = 49, ulcerative colitis (UC) n = 57) and h ealthy controls (n = 19). Disease activity was scored using themodified Truelove Witts (MTWSI) for UC and the Harvey Bradshaw severity indices (HBSI) for CD. Fo ur colour flow cytometric analysis was used to identify, enumerate, and phenotyp e DC. DC from patients with acute flare ups and healthy controls were cultured a nd stimulated with CpG ODN 2006 or lipopolysaccharide (LPS). Results: IBD patien ts in remission (PDC UC, 0.39% ; CD, 0.35% ; MDC- 1 UC, 0.23% ; CD, 0.22% of PBMC) have slightly lower numbers of circulating DC compared with healthy con trols (PDC 0.41% , MDC- 1 0.25% of PBMC). In acute flare ups IBD patients ex perience a significant drop of DC (PDC UC, 0.04% ; CD, 0.11% ; MDC- 1 UC, 0.1 1% ; CD, 0.14% of PBMC) that correlates with disease activity (correlation co efficients: PDC MTWSI, 0.93; HBSI, 0.79; MDC- 1 MTWSI, 0.75; HBSI, 0.81). Moreo ver, both express α l4β 7 integrin and display an immature phenotype. Freshly isolated PDC and MDC- 1 from untreated flaring IBD patients express higher base line levels of CD86 which increases further in culture and upon stimulation comp ared with healthy controls. Conclusion: IBD patients lack immature blood DC duri ng flare ups which possibly migrate to the gut. An aberrant response to microbia l surrogate stimuli suggests a disturbed interaction with commensals.
