AIM To assess the levels of different immune modulators in patients with hepatocellular carcinoma(HCC),in relation to other hepatic diseases.METHODS Eighty-eight patients were included in the current study and represe...AIM To assess the levels of different immune modulators in patients with hepatocellular carcinoma(HCC),in relation to other hepatic diseases.METHODS Eighty-eight patients were included in the current study and represented patients with HCC(20),liver cirrhosis(28) and chronic hepatitis(CH;25),and normal controls(NC;15).Peripheral blood was isolated for immunophenotyping of active myeloid dendritic cells(m DCs;CD1 c and CD40),mature inactive myeloid cells(CD1 c and HLA),active plasmacytoid cells(p DCs;CD303 and CD40),mature inactive p DCs(CD30 and HLA),active natural killer(NK) cells(CD56 and CD161),active NK cells(CD56 and CD314) and inactive NK cells(CD56 and CD158) was done by flow cytometry.Serum levels of interleukin(IL)-2,IL-10,IL-12,IL-1β,interferon(IFN)-α,IFN-γ and tumor necrosis factor(TNF)-αR2 were assessed by ELISA.RESULTS Active m DCs(CD1 C+/CD40+) and inactive m DCs(CD1 c+/HLA+) were significantly decreased in HCC patients in relation to NC(P < 0.001).CD40+ expression on active p DCs was decreased in HCC patients(P < 0.001),and its level was not significantly changed among other groups.Inactive p DCs(CD303+/HLA+),inactive NKs(CD56+/CD158+) and active NKs(CD56+/CD161+) were not statistically changed among the four groups studied;however,the latter was increased in CH(P < 0.05).NKG2 D was statistically decreased in HCC,CH and cirrhosis(P < 0.001),and it was not expressed in 63%(12/20) of HCC patients.There was significant decrease of IL-2,IFN-α and IFN-γ(P < 0.001),and a significant increase in IL-10,IL-1β,and TNF-αR2(P <0.01,P < 0.001 and P < 0.001;respectively) in HCC patients.There was inverted correlation between IL-12 and IL-1β in HCC(r =-0.565,P < 0.01),with a strong correlation between p DCs(CD303+/CD40+) and NKs(CD56+/CD161+;r = 0.512,P < 0.05) as well as inactive m DCs(CD1 c+/HLA+) and inactive NK cells(CD56+/CD158+;r = 0.945,P < 0.001).CONCLUSION NKG2 D,CD40,IL-2 and IL-10 are important modulators in the development and progression of HCC.展开更多
Background Advances in transplantation immunology show that the balance between dendritic cells （DCs） and their subsets can maintain stable immune status in the induction of tolerance after transplantation. The aim ...Background Advances in transplantation immunology show that the balance between dendritic cells （DCs） and their subsets can maintain stable immune status in the induction of tolerance after transplantation. The aim of this study was to investigate if DCs and DC subpopulations in recipient peripheral blood are effective diagnostic indicators of acute rejection following kidney transplantation. Methods Immunofluorescent flow cytometry was used to classify white blood cells （WBCs）, the levels of mononuclear cells and DCs （including the dominant subpopulations, plasmacytoid DC （pDC） and myeloid DC （mDC）） in peripheral blood at 0, 1, 7, and 28 days and 1 year after kidney transplantation in 33 patients. In addition, the blood levels of interleukin-10 （IL-10） and IL-12 were monitored before and after surgery. Fifteen healthy volunteers served as normal controls. Patients were undertaking hemodialysis owing to uremia before surgery. Results The total number of DCs, pDC, and mDC in peripheral blood and the pDC/mDC ratio were significantly lower in patients than controls （P 〈0.05）. Peripheral DCs suddenly decreased at the end of day 1, then gradually increased through day 28 but remained below normal levels. After 1 year, levels were higher than before surgery but lower than normal. The mDC levels were higher in patients with acute rejection before and 1 day after surgery （P 〈0.005）. There was no significant difference in IL-10 and IL-12 levels between patients with and without acute rejection. Conclusion The changes in DCs and DC subpopulations during the acute rejection period may serve as effective markers and referral indices for monitoring the immune state, and predicting rejection and reasonably adjusting immunosuppressants.展开更多
In eukaryotes, there are at least 60 members of the DExD/H helicase family, many of which are able to sense viral nucleic acids. By screening all known family members, we identified the helicase DHX33 as a novel doubl...In eukaryotes, there are at least 60 members of the DExD/H helicase family, many of which are able to sense viral nucleic acids. By screening all known family members, we identified the helicase DHX33 as a novel double-stranded RNA （dsRNA） sensor in myeloid dendritic cells （mDCs）. The knockdown of DHX33 using small heteroduplex RNA （shRNA） blocked the ability of mDCs to produce type I interferon （IFN） in response to poly hC and reovirus. The HELICc domain of DHX33 was shown to bind poly hC. The interaction between DHX33 and IPS-1 is mediated by the HELICc region of DHX33 and the C-terminal domain of IPS-1 （also referred to MAVS and VISA）. The inhibition of DHX33 expression by RNA interference blocked the poly hC-induced activation of MAP kinases, NF-KB and IRF3. The interaction between the helicase DHX33 and IPS-1 was independent of RIG-I/MDA5 and may be a novel pathway for sensing poly I-C and RNA viruses in mDCs.展开更多
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
文摘AIM To assess the levels of different immune modulators in patients with hepatocellular carcinoma(HCC),in relation to other hepatic diseases.METHODS Eighty-eight patients were included in the current study and represented patients with HCC(20),liver cirrhosis(28) and chronic hepatitis(CH;25),and normal controls(NC;15).Peripheral blood was isolated for immunophenotyping of active myeloid dendritic cells(m DCs;CD1 c and CD40),mature inactive myeloid cells(CD1 c and HLA),active plasmacytoid cells(p DCs;CD303 and CD40),mature inactive p DCs(CD30 and HLA),active natural killer(NK) cells(CD56 and CD161),active NK cells(CD56 and CD314) and inactive NK cells(CD56 and CD158) was done by flow cytometry.Serum levels of interleukin(IL)-2,IL-10,IL-12,IL-1β,interferon(IFN)-α,IFN-γ and tumor necrosis factor(TNF)-αR2 were assessed by ELISA.RESULTS Active m DCs(CD1 C+/CD40+) and inactive m DCs(CD1 c+/HLA+) were significantly decreased in HCC patients in relation to NC(P < 0.001).CD40+ expression on active p DCs was decreased in HCC patients(P < 0.001),and its level was not significantly changed among other groups.Inactive p DCs(CD303+/HLA+),inactive NKs(CD56+/CD158+) and active NKs(CD56+/CD161+) were not statistically changed among the four groups studied;however,the latter was increased in CH(P < 0.05).NKG2 D was statistically decreased in HCC,CH and cirrhosis(P < 0.001),and it was not expressed in 63%(12/20) of HCC patients.There was significant decrease of IL-2,IFN-α and IFN-γ(P < 0.001),and a significant increase in IL-10,IL-1β,and TNF-αR2(P <0.01,P < 0.001 and P < 0.001;respectively) in HCC patients.There was inverted correlation between IL-12 and IL-1β in HCC(r =-0.565,P < 0.01),with a strong correlation between p DCs(CD303+/CD40+) and NKs(CD56+/CD161+;r = 0.512,P < 0.05) as well as inactive m DCs(CD1 c+/HLA+) and inactive NK cells(CD56+/CD158+;r = 0.945,P < 0.001).CONCLUSION NKG2 D,CD40,IL-2 and IL-10 are important modulators in the development and progression of HCC.
基金The study was supported by the National Basic Research Program of China （973 Project） （No. 2009CB522400） and the National Natural Science Foundation of China （No. 30772170）.Acknowledgement： The authors wish to thank Bi Rumei, a technician from the Urological Department of Beijing Friendship Hospital, The Capital Medical University, for her support and help in data analysis.
文摘Background Advances in transplantation immunology show that the balance between dendritic cells （DCs） and their subsets can maintain stable immune status in the induction of tolerance after transplantation. The aim of this study was to investigate if DCs and DC subpopulations in recipient peripheral blood are effective diagnostic indicators of acute rejection following kidney transplantation. Methods Immunofluorescent flow cytometry was used to classify white blood cells （WBCs）, the levels of mononuclear cells and DCs （including the dominant subpopulations, plasmacytoid DC （pDC） and myeloid DC （mDC）） in peripheral blood at 0, 1, 7, and 28 days and 1 year after kidney transplantation in 33 patients. In addition, the blood levels of interleukin-10 （IL-10） and IL-12 were monitored before and after surgery. Fifteen healthy volunteers served as normal controls. Patients were undertaking hemodialysis owing to uremia before surgery. Results The total number of DCs, pDC, and mDC in peripheral blood and the pDC/mDC ratio were significantly lower in patients than controls （P 〈0.05）. Peripheral DCs suddenly decreased at the end of day 1, then gradually increased through day 28 but remained below normal levels. After 1 year, levels were higher than before surgery but lower than normal. The mDC levels were higher in patients with acute rejection before and 1 day after surgery （P 〈0.005）. There was no significant difference in IL-10 and IL-12 levels between patients with and without acute rejection. Conclusion The changes in DCs and DC subpopulations during the acute rejection period may serve as effective markers and referral indices for monitoring the immune state, and predicting rejection and reasonably adjusting immunosuppressants.
文摘In eukaryotes, there are at least 60 members of the DExD/H helicase family, many of which are able to sense viral nucleic acids. By screening all known family members, we identified the helicase DHX33 as a novel double-stranded RNA （dsRNA） sensor in myeloid dendritic cells （mDCs）. The knockdown of DHX33 using small heteroduplex RNA （shRNA） blocked the ability of mDCs to produce type I interferon （IFN） in response to poly hC and reovirus. The HELICc domain of DHX33 was shown to bind poly hC. The interaction between DHX33 and IPS-1 is mediated by the HELICc region of DHX33 and the C-terminal domain of IPS-1 （also referred to MAVS and VISA）. The inhibition of DHX33 expression by RNA interference blocked the poly hC-induced activation of MAP kinases, NF-KB and IRF3. The interaction between the helicase DHX33 and IPS-1 was independent of RIG-I/MDA5 and may be a novel pathway for sensing poly I-C and RNA viruses in mDCs.
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.
