MBD2调控Th17优势分化与非Th2优势型哮喘

辅助性T细胞17(Th17)是近年发现的新CD4 ＋T细胞亚群,主要通过分泌细胞因子白细胞介素17趋化中性粒细胞在气道募集而促进非Th2优势型哮喘的发生。甲基化-CpG结合域蛋白在DNA甲基化中具有调控作用,且能通过调控Th17分化而影响哮喘的进展。文中主要综述了近年甲基化-CpG结合域蛋白2调控Th17优势...     

Th17细胞/调节性T细胞偏倚在类风湿关节炎中的意义

目的 探讨白细胞介素(IL)-17+CD4+炎症性T细胞(Th17细胞)和Foxp3+CD4+调节性T细胞在类风湿关节炎(RA)的相互关系及可能机制.方法 采用前瞻性随机开放研究.测定RA患者外周血IL-17+CD4+T细胞及Foxp3+CD4+T细胞的比例变化及其相关细胞因子转化生长因子(TGF)-β、IL-6、IL-23和IL-17水平.结果 RA患者外周血IL-17+CD4+T细胞明显升高(P<0.01),而Foxp3+CD4+T细胞明显降低(P<0.01).同时,血清中IL-6、IL-23和IL-17水平明显升高(均P<0.01),而TGF-β水平无明显变化(P>0.05).结论 RA患者Th17细胞数量增高,而调节性T细胞数量减少,体内相关细胞因子的变化是引起上述改变的重要原因.     

急性脑梗死患者脑脊液肿瘤坏死因子、白细胞介素6和8的变化

为探讨脑梗死患者脑脊液中肿瘤坏死因子、白细胞介素6、白细胞介素8水平的动态变化，采用酶联免疫吸附法分别测定30例脑梗死患者病期＜1周与病期＞4周以及20例健康老年人的脑脊液中肿瘤坏死因子、白细胞介素6、白细胞介素8水平。结果发现，脑梗死患者脑脊液肿瘤坏死因子、白细胞介素8水平较正常对照组增高、病期＜1周者脑脊液肿瘤坏死因子、白细胞介素8水平较病期＞4周者显著升高；病期＞4周者相比无明显改变（P＞0．05），但均高于正常对照组，而且神经功能缺损程度与脑脊液肿瘤坏死因子、白细胞介素8的含量呈明显正相关关系。结果提示，脑脊液肿瘤坏死因子、白细胞介素6、白细胞介素8水平的动态监测对脑梗死发生、发展及预后判断具有一定预测价值。     

Changes in serum interleukin-6 and high-sensitivity C-reactive protein levels in patients with acute coronary syndrome and their responses to simvastatin

The role of inflammation in acute coronary syndrome (ACS) and the mechanism by which statin treats ACS is explored. Serum high-sensitivity C-reactive protein (hs-CRP) and interleukin-6 (IL-6) levels were measured in 50 patients with ACS [including 30 cases with unstable angina (UA) and 20 patients with acute myocardial infarction (AMI)], 34 patients with stable angina (SA), and 30 controls. Patients in the ACS group were randomly assigned to a simvastatin group (including a simvastatin AMI subgroup, n = 11 and a simvastatin UA subgroup, n = 14) and a routine group (including a routine AMI subgroup, n = 9 and a routine UA subgroup, n = 16). The simvastatin group was given simvastatin 20mg/day and the routine group a placebo. After a 3-week follow-up, serum hs-CRP, IL-6 levels, and serum lipid concentrations were measured again. Both serum IL-6 and hs-CRP levels were significantly higher in the ACS group (including the UA and AMI subgroups) than in the SA and control groups (P < 0.001). After 3 weeks of treatment with simvastatin, the serum IL-6, hs-CRP, total cholesterol, and low-density lipoprotein cholesterol levels were decreased significantly in the simvastatin group (P < 0.001), but no significant changes were observed in the routine group. No relationship was observed between the rate of decrease of serum IL-6 or hs-CRP and serum lipids levels. The hs-CRP level showed a significant correlation with IL-6 by Spearmans rank correlation analysis (P < 0.01). Inflammation plays an important role in the initiation of ACS. Simvastatin possesses an anti-inflammatory effect, independent of its lipid-lowering action, which may play an important role in the early treatment of ACS.     

长期口服雌激素对去卵巢大鼠海马结构内β-淀粉样前体蛋白及其mRNA表达的影响

目的 观察长期口服复方尼尔雌醇和小剂量17β-雌二醇补充治疗对去卵巢大鼠海马结构内β-淀粉样前体蛋白（β-APP）及其mRNA表达的影响。方法 7月龄SD大鼠按体重随机分成5组：正常对照组、假手术组（SHAM）、去卵巢组（OVX）、17β-雌二醇预防干预组（OVX／ERT）和复方尼尔雌醇预防干预组（OVX／NL）连续观察。5组均在去卵巢后35w处死。用免疫组织化学方法（SABC法）显示大鼠海马结构内β-APP，原位杂交方法显示β-APP mRNA。细胞计数及图像分析观察β-APP及其mRNA的变化。结果 OVX组海马结构内各亚区β-APP阳性神经元数量和平均光密度均高于正常组、SHAM组、OVX／ERT组、OVX／NL组（P〈0．05），而β-APP mRNA阳性神经元数量和平均光密度在5组之间均无显著性差异。结论 长期雌激素缺乏导致了大鼠海马结构内β-APP含量的增加，长期口服复方尼尔雌醇和小剂量17β-雌二醇补充治疗可减少β-APP的含量，且二者效果相当。促进β-APP分解、减少β-APP的含量，进而减少Aβ的沉着可能是雌激素神经保护的重要机制之一。     

辛伐他汀对急性冠脉综合征患者血清C-反应蛋白的影响

目的观察急性冠脉综合征(ACS)患者早期应用辛伐他汀治疗对血脂和炎症反应标记物的影响及差异,探讨他汀类药物在ACS早期治疗中的作用。方法 ACS住院患者113例,入院后测定血清三酰甘油(TG)、总胆固醇(TC)、低密度脂蛋白胆固醇(LDL-C)、高密度脂蛋白胆固醇(HDL-C)、白介素-6(IL-6)和C反应蛋白 (CRP)水平,然后随机分为辛伐他汀治疗组和对照组。出院时重复测定上述指标。同期测定30例健康者作对照比较。结果治疗组治疗后CRP、IL-6比治疗前明显下降,差异有显著性意义(P<0．05)。结论 ACS患者早期应用辛伐他汀治疗有明显的抗感染作用。     

白细胞介素-10基因多态性与乙型肝炎病毒感染的关系

目的:探讨中国人白细胞介素-10基因启动子单核苷酸多态性与乙型肝炎病毒感染之后临床发展之间的关系.方法:分别采用聚合酶链反应-限制性片段长度多态性分析法(PCR-RFLP)和聚合酶链反应-序列特异性引物扩增法(PCR-SSP)检测478例慢性乙型肝炎患者,223例乙肝病毒携带者及267例自限性感染者基因组DNAIL-10基因启动子区域3个多态位点-592、-819、-1082的基因多态性,并进行相关性分析.结果:IL-10-1082A等位基因及AA基因型在慢性乙型肝炎患者组的频率明显高于自限性感染者组和乙肝病毒携带者组(A:χ2=37.72,P=0.000;χ2=45.23,P=0.000;AA:χ2=20.53,P=0.000;χ2=19.14,P=0.000).IL-10-819T等位基因及TT基因型在慢性乙型肝炎患者组的频率也高于自限性感染者组和乙肝病毒携带者组(T:χ2=10.5,P<0.001;χ2=17.38,P<0.001;TT:χ2=8.76,P=0.003;χ2=5.656,P=0.017).IL-10-592C/A等位基因频率和AA/CC/AC基因型在三组的分布没有统计学意义(P>0.05).结论:IL-10基因启动子多态性与乙肝病毒感染后临床发展过程可能相关.     

不完全型P450 17α酶缺乏症六例报道及分析

目的 探讨不完全型P45017α酶（17α羟化爵每／17,20裂解酶）缺乏症（17OHD）的临床特征、鉴别诊断和处理方法。方法 回顾性分析北京协和医院6例不完全型17OHD的临床特征,并通过文献复习讨论该病的发病机制和典型的临床特征。结果 6例中4例为46,XX不完全型17OHD患者,其临床特征包括女性表型、不同程度的乳房发育、阴毛少、月经稀发或继发闭经、反复发作的卵巢囊肿、性腺功能低下伴持续性血清孕酮和（或）17α羟孕酮水平升高、合并或不合并低钾性高血压;另2例为46,XY不完全型17OHD患者,伴有不同程度的外生殖器性别不清和低钾性高血压。结论 不完全型17OHD是一种极为罕见的先天性甾体合成酶缺乏,临床上出现月经异常、性发育幼稚、反复发作的卵巢囊肿或外生殖器性别不清时应考虑此病。     

Expression of interleukin-27 by human trophoblast cells

Cytokines produced at the fetal-maternal interface play a key role in regulating maternal tolerance to the fetus and successful pregnancy. Previously, we showed that EBV-induced gene 3 (EBI3), an interleukin (IL)-12 p40 homologue, was expressed at very high levels by syncytiotrophoblasts and extravillous trophoblasts throughout human pregnancy. EBI3 was recently shown to associate with a novel ligand, p28, to form a new heterodimeric cytokine with important immunoregulatory functions, IL-27. In this study, we investigated whether EBI3 expression by trophoblast cells is associated with that of p28 to form IL-27. We found that genes encoding IL-27 (EBI3 and p28) and its receptor (IL-27R and gp130) were expressed in the placenta at various stages of pregnancy. Co-immunoprecipitation experiments performed from placental lysates, and ELISA of culture supernatants from placental explants, showed that IL-27 heterodimer was produced and released from placental cells. In situ studies of placentae of first, second and third trimester of pregnancy, and of choriocarcinomas, demonstrated that syncytiotrophoblast cells co-expressed EBI3 and p28. Similarly, extravillous trophoblast cells invading the decidua were found to co-express both subunits of IL-27. These data suggest that IL-27 may be part of the cytokine network regulating local immune responses and angiogenesis during human pregnancy.     

Cytokine concentrations during the first days of life

OBJECTIVE: To evaluate the cytokine concentration patterns during the first 5 days of life by measuring serum concentrations of type-1 cytokines, like interleukin-2 (IL-2) and interferon-gamma (IFN-gamma) and type-2 cytokines, like IL-4, as well as the receptors of IL-2 (sIL-2R) and IL-4 (sIL-4R) during the early neonatal period. SUBJECTS AND METHODS: Forty-two healthy term neonates were included in the study. Cytokine concentrations were measured in umbilical cord, in the 1st and 5th day after birth and compared with those in serum of 30 healthy adults. RESULTS: IL-2 concentrations presented a decrease trend from umbilical cord to 5th day, while sIL-2R showed a significant elevation from umbilical cord to 5th day after birth. IL-4 concentrations did not differ significantly among umbilical cord, the 1st and the 5th day, while the sIL-4R showed the highest values in the 1st day after birth. Both IL-4 and sIL-4R concentrations in neonatal samples were elevated compared to adults. IFN-gamma concentrations increased significantly from umbilical cord to 5th day of life. CONCLUSION: Our findings indicate a dysregulation among IL-2, IL-4 and IFN-gamma concentrations during the 1st day after birth, favoring a more precocious expression of IL-2 and IL-4 against IFN-gamma that seems to be ameliorated in the end of the 1st week of life.