载脂蛋白AI对单核细胞表型与MCP-1/CCR2的影响

目的探讨载脂蛋白AI(apoAI)对动脉粥样硬化小鼠血液、脾脏中Ly6C^(hi)单核细胞和单核细胞趋化蛋白1(MCP-1)浓度及CC类趋化因子受体2(CCR2)表达的影响。方法 16只雄性apo E-/-小鼠高脂饲料饲养12周后随机分为对照组和apoAI组,处死前第1、3天分别予以生理盐水和apoAI(40 mg/kg)干预,处死12 h前予以腹腔注射脂多糖(LPS)25μg/只,酶联免疫法检测血浆MCP-1浓度,流式细胞仪检测血液、脾脏中Ly6C^(hi)单核细胞比例。THP-1细胞随机分为对照组和apoAI组,予以相应干预后加入浓度为10μg/L的LPS孵育,Western blotting检测2组中CCR2的表达。结果与对照组比较,apoAI能显著降低血液及脾脏中Ly6C^(hi)单核细胞比例及血浆中MCP-1浓度(P<0.01),体外研究显示apoAI能下调单核细胞CCR2的表达(P<0.05)。结论 apoAI能降低MCP-1浓度及血液、脾脏中Ly6C^(hi)单核细胞比例,抑制CCR2的表达。

单核细胞表型与动脉粥样硬化关系的研究进展

大量证据表明动脉粥样硬化是一种慢性炎症疾病,而单核细胞则在动脉粥样硬化的发生发展中起关键作用。近来研究发现单核细胞存在异质性,其不同表型在动脉粥样硬化、类风湿性关节炎、川崎病等炎症和免疫相关疾病中的作用逐渐被认识。本文就单核细胞表型、功能,及其与小鼠和人类动脉粥样硬化关系的研究进展作一简要综述。

多发性骨髓瘤患者骨髓单核细胞免疫表型特点及其临床意义

目的:探讨多发性骨髓瘤(MM)患者骨髓单核细胞免疫表型表达的特点及其临床意义。方法:采用流式细胞术检测67例MM患者和30例贫血患者(对照组)骨髓单核细胞免疫表型表达,筛选出与对照组有统计学差异的免疫表型。进一步采用单因素及多因素回归分析影响预后的危险因素,分析单核细胞免疫表型对MM预后的影响,进一步分析CD38+单核细胞与临床特点的相关性。结果:MM组中CD138+单核细胞比例(CD138+M%)、CD27+单核细胞比例(CD27+M%)、CD56+单核细胞比例(CD56+M%)显著高于对照组(P<0.05);而CD38+单核细胞比例(CD38+M%)、HLA-DR+单核细胞比例(HLA-DR+M%)显著低于对照组(P<0.01)。低CD38+M%组中位PFS低于高CD38+M%组;低CD138+M%、低CD27+M%、低CD38+M%、低HLA-DR+M%组中位OS显著缩短。Cox回归分析结果显示,低CD38+M%是预后的独立危险因素。低CD38+M%组受累/非受累游离轻链比值≥100比例及1q21+比例较高CD38+M%组明显升高(P<0.05);低CD38+M%组骨髓瘤细胞CD38-所占比例显著高于高CD38+M%组(P<0.05)。结论:MM患者骨髓CD38+单核细胞的表达与患者预后及临床特点密切相关,或可用来评估预后,指导治疗。

肝硬化患者外周血单核细胞的频率、表型、细胞因子表达特点及其临床意义

目的探讨肝硬化患者外周血单核细胞的频率、表型及细胞因子表达特点与临床意义。方法采用流式细胞术和细胞内因子染色法测定99例肝硬化患者(Child-Pugh分级A级33例、B级33例、C级33例)和33例健康者外周血单核CD14+和CD14+CD16+细胞频率、单核细胞表型(HLA-DR)、血清TNF-α水平。结果肝硬化患者CD14+和CD14+CD16+均高于对照组(P<0.01)。肝硬化患者Child-Pugh分级增高,CD14+、CD14+CD16+细胞频率、TNF-α水平也随之增加,A级组<B级组<C级组(P<0.05);随着Child-Pugh分级增高,外周血单核细胞HLA-DR表达水平逐渐降低,A级组>B级组>C级组(P<0.01或P<0.05)。结论肝硬化患者外周血单核细胞频率、表型、细胞因子表达特点可反映肝硬化的严重程度,对预测肝硬化的发生发展、病情及预后有重要价值。

养心氏片治疗不稳定型心绞痛典型病例分析

目的观察养心氏片对冠心病不稳定性心绞痛患者外周血单核细胞表型及功能的影响,探讨养心氏片治疗冠心病的可能机制。方法选择冠心病不稳定性心绞痛典型患者1例,分别记录入选者的基本信息及血脂、肝功、肾功、血清胱抑素C等指标。检测单核细胞CD163、CD206、白细胞介素10(IL-10)、白细胞介素12(IL-12)的表达,酶联免疫吸附实验(ELISA)法检测血清中白细胞介素10、白细胞介素12及肿瘤坏死因子α(TNF-α)浓度,并对患者进行综合生活质量评分:西雅图心绞痛调查量表(SAQ)、广泛性焦虑自评量表(GAD-7)、9条目患者健康问卷(PHQ-9)评估。结果经过养心氏片联合常规药物治疗后,患者单核细胞CD14+CD163+CD206+表达上调,而CD14+CD163-CD206-表达下调;促炎症因子白细胞介素12、肿瘤坏死因子α表达下降,而抗炎因子白细胞介素10较治疗前表达升高,改善西雅图量表评分,降低广泛性焦虑自评量表、抑郁量表评分。结论养心氏片可以促进巨噬细胞表型转变,改变冠心病患者的炎症状态,延缓动脉粥样硬化的发展,治疗冠心病不稳定型心绞痛,同时能够达到双心治疗的目的。

Culture of Porcine Peripheral Blood Monocyte-derived Dendritic Cells in vitro

[Objective] This study aimed to establish an in vitro culture model for porcine peripheral blood monocyte-derived dendritic cells （MoDCs）. [Method] Fresh peripheral blood mononuclear cells （PBMCs） were separated from pig, and precursor dendritic cells were obtained by adherence method. The dendritic cells were treated by recombinant porcine granulocyte-monocyte colony stimulating factor （rpGM-CSF） and recombinant porcine interleukin-4 （rplL-4） together, and lipopolysaccharide （LPS） respectively. The cells in different time periods were collected. The morphology of the collected cells was observed by scanning electron microscopy; the expression of surface molecules and phagocytic ability to FITC-dextran were detected by flow cy- tometry; and the stimulating ability for allogeneic T cells was detected by mixed lymphocyte reaction. [Result] The DCs suffering maturation induction in vitro showed typical dendritic morphology; compared with those of DCs untreated by LPS, the cell surface expression of CDla, CD80, CD86, SLAII and CD172a of DCs treated by LPS was significantly increased, the phagocytic ability was reduced slightly, and the stimulating ability for allogeneic T cells was enhanced to some extent. [Conclusion] An in vitro culture method was successfully established for porcine MoDCs in this study, laying a foundation for further study on the role of porcine MoDCs in immunoregulation and anti-virus infection.

Effect of Herpes Simplex Virus-2 Infection in Vitro on the Expression of HLA Class II Antigen of Monocytes

Objectives: In order to investigate the role of mono-cytes and human leukocyte antigen (HLA) class II an-tigen in herpes simplex virus-2 (HSV-2) infection, westudied the effect of HSV-2 infection in vitro on theexpression of HLA class II antigen on monocytes.Methods: Monocytes were infected with HSV-2(Strain 333). Culture cells were collected 1, 3, 5 and 7days after infection. The levels of expression of HLAclass II antigen were measured by using alkaline phos-phatase antialkaline phosphatase method (APAAP).Results: The levels of the expression of HLA class IIantigen on monocytes significantly decreased on thefirst day of post-infection, and then gradually returnedto levels found in the controls by the 7th day post-infection.Conclusion: HLA class II antigen expression onmonocytes was inhibited with HSV-2 infection, whichmight be one means of virus escape at an early phase.The expression of HLA class II antigen may play animportant role in herpes simplex viurs-2 pathogenic-ity and immunity.

Distinct toll-like receptor expression in monocytes and T cells in chronic HCV infection

AIM： Hepatitis C virus often establishes chronic infections. Recent studies suggest that viral and bacterial infections are more common in HCV-infected patients compared to controls. Pathogens are recognized by Toll-like receptors （TLRs） to shape adaptive and innate immune responses. METHODS： In this study, to infected host to recognize assess the ability of HCV-infected host to recognize invading pathogens, we investigated Toll-like receptor expression in innate （monocytes） and adaptive （T cells） immune cells by realtime PCR. RESULTS： We determined that RNA levels for TLRs 2, 6. 7, 8, 9 and 10 mRNA levels were upregulated in both monocytes and T cells in HCV-infected patients compared to controls. TLR4 was only upregulated in T lymphocytes, while TLR5 was selectively increased in monocytes of HCV-infected patients. MD-2, a TLR4 coreceptor, was increased in patients＇ monocytes and T cells while CD14 and MyD88 were increased only in monocytes. CONCLUSION： Our data reveal novel details on TLR expression that likely relates to innate recognition of pathogens and immune defense in HCV-infected individuals.