FcγRI plays a critical role in patients with ulcerative colitis relapse

Ulcerative colitis (UC) is a disease that frequently relapses and affects more than 0.1% general population; the underlying mechanism is poorly understood. Published data show that polymorphonuclear neutrophils (PMN) contribute to the pathogenesis of UC. This study aims to identify antigen (Ag)-specific PMNs and investigate their role in UC relapse. In this study, the correlation between PMN activities and UC relapse was assessed in a group of UC patients. A UC mouse model was developed to expand the findings of UC patient study. The results showed that a positive correlation was detected between the high PMN activities and the food Ag-specific IgG amounts in colon biopsies of UC patients. UC patient-derived Ag-specific PMNs could be activated upon exposure to food specific Ag. The Ag/FcγRI complexes were detected on the surface of PMNs in UC patients. Re-exposure of sensitized PMNs to specific Ag triggered PMN activation and induced UC-like inflammation in the mouse colon. We conclude that FcγRI plays a critical role in UC relapse. Inhibition of FcγRI can efficiently inhibits experimental UC.     

人博卡病毒VP2病毒样颗粒诱导特异性细胞免疫反应的研究

目的 探讨酶联免疫斑点试验(ELISPOT)检测人博卡病毒(HBoV) VP2病毒样颗粒(VLPs)诱导特异性细胞免疫反应的最佳条件.方法 HBoV VP2 VLPs免疫小鼠后,用ELISPOT方法检测小鼠的特异性细胞免疫反应,观察不同多肽刺激、不同细胞培养时间、不同细胞浓度以及不同浓度特异性刺激多肽条件下ELISPOT结果.结果 多肽P3(GYIPIENEL)及P5(LYQMPFFLL)刺激HBoV1 VLPs免疫小鼠脾脏淋巴细胞产生斑点数分别为233个/10(6)和157个/10(6)细胞,P8(GYIPVIHEL)刺激HBoV2 VLPs免疫小鼠脾脏淋巴细胞产生斑点数为113个/10(6)细胞;培养时间以24 h为最佳,此时HBoV1与HBoV2实验组特异性分泌IFN-(ｒ)的比率分别为232个/10(6)和119个/10(6)细胞;小鼠脾脏淋巴细胞浓度以5×10(5)为最佳,此时HBoV1与HBoV2实验组特异性分泌IFN-(γ)的比率分别为232个/10(6)和108个/10(6)细胞;刺激物浓度10μg/ml为最佳,HBoV1与HBoV2实验组特异性分泌IFN-(γ)的比率分别为233个/10(6)和96个/10(6)细胞.结论 HBoV1与HBoV2特异性BABL/c小鼠T细胞表位多肽分别为HBoV1:P3;HBoV2:P8.检测人博卡病毒VP2病毒样颗粒诱导特异性细胞免疫反应ELISPOT方法最佳实验条件为:培养时间24 h,细胞浓度5×10(5)细胞/孔,刺激多肽终浓度10 μg/ml,可用于HBoV在小鼠上的细胞免疫研究.     

槐杞黄颗粒治疗儿童原发性肾病综合征的前瞻性随机对照临床研究

目的观察槐杞黄颗粒对儿童原发性肾病综合征的治疗作用。方法采用前瞻性研究法,2009年7月至2011年12月住院并初诊为原发性肾病综合征的患儿随机分为糖皮质激素联用槐杞黄颗粒治疗组(观察组,n=23)和单用糖皮质激素治疗组(对照组,n=19),比较两组患儿浮肿消退时间、尿蛋白阴转时间、感染发生率、复发率、糖皮质激素用量及细胞、体液免疫功能。结果观察组与对照组浮肿消退时间、尿蛋白阴转时间、复发率差异无统计学意义(P0.05)。观察组感染发生率低于对照组(P0.05),6个月时每日糖皮质激素用量小于对照组(P0.05)。两组体液、细胞免疫学指标检测差异无统计学意义(P0.05)。未观察到槐杞黄相关不良反应的发生。结论槐杞黄可减少肾病综合征患儿糖皮质激素用量及感染合并症的发生,且显示了其治疗的安全性。     

Intra-tumoral tertiary lymphoid structures are associated with a low risk of early recurrence of hepatocellular carcinoma

1. Download high-res image (128KB)
2. Download full-size image

     

肠内营养对脑卒中患者胃肠道及免疫功能的影响

目的 探讨肠内营养在脑卒中患者中的应用价值。方法 脑卒中患者120例，肠内营养和肠外营养组各60例。两组在营养支持前及营养支持后1个月分别用消化道内镜检查胃肠黏膜情况，并测定和比较T淋巴细胞亚群及免疫球蛋白。结果 肠内营养组在肠内营养支持后，胃、十二指肠黏膜损害（溃疡率）21例（35．0％），肠外组为41例（68．3％），肠内组显著低于肠外组（P〈0．01），肠外组轻型15例（50．0％），肠外组重型26例（86．7％），轻型显著低于重型（P〈0．01）；肠外组重型治疗后血清免疫球蛋白IgG、IgA、IgD分别为（9．27±2．41）g／L、（2．11±0．64）g／L、（2．11±0．36）mg／L及T淋巴细胞亚群CD3^＋、CD4^＋、CD4^＋／CD8^＋分别为（51．42±3．89）％、（36．26±2．82）％、（1．17±0．29），肠内组重型治疗后IgG、IgA、IgD分别为（11．70±2．89）g／L、（2．81±0．69）g／L、（2．40±0．31）mg／L，T淋巴细胞亚群CD3^＋、CD4^＋、CD4^＋／CD8^＋分别为（60．70±4．94）％、（40．38士4．10）％、（1．49±0．58），肠内营养组显著高于肠外营养组（P〈0．01）；机体感染发生率其肠外组为23例（38．3％），肠内组总感染11例（18．3％），肠内组显著低于肠外组（P〈0．05）。结论 肠内营养在脑卒中患者中具有维护肠道屏障功能和免疫功能的作用，并能降低感染发生率，且安全可行。     

Zika virus infections imported to Italy: Clinical,immunological and virological findings,and public health implications

We report the first two cases of laboratory confirmed Zika virus (ZIKV) infections imported into Italy from French Polynesia. Both patients presented with low grade fever, malaise, conjunctivitis, myalgia, arthralgia, ankle oedema, and axillary and inguinal lymphadenopathy. One patient showed leukopenia with relative monocytosis and thrombocytopenia.The diagnosis was based on ZIKV seroconversion in both cases and on ZIKV RNA detection in one patient from acute serum sample. Sera from both patients exhibited cross-reactivity with dengue virus antigens. Our immunological analysis demonstrated that recovery from ZIKV infection is associated with restoration of normal numbers of immune cells in the periphery as well as with normal function of antigen-presenting cells. ZIKV is an emerging arbovirus, which has recently spread extensively in tourist destinations on several West Pacific islands. Returning viremic travelers may ignite autochthonous infections in countries like Italy, which are infested by Aedes albopictus, a suitable vector for ZIKV. The role of clinicians is crucial and includes early diagnosis and timely notification of public health authorities in order to quickly implement adequate focal vector control measurements.     

ShcC proteins: Brain aging and beyond

To date, most studies of Shc family of signaling adaptor proteins have been focused on the near-ubiquitously expressed ShcA, indicating its relevance to age-related diseases and longevity. Although the role of the neuronal ShcC protein is much less investigated, accumulated evidence suggests its importance for neuroprotection against such aging-associated conditions as brain ischemia and oxidative stress. Here, we summarize more than decade of studies on the ShcC expression and function in normal brain, age-related brain pathologies and immune disorders with a focus on the interactions of ShcC with signaling proteins/pathways, and the possible implications of these interactions for changes associated with aging.     

沙美特罗替卡松联合孟鲁斯特对哮喘患儿IL－4 INF－γIgE EOS 影响研究

目的：探讨沙美特罗替卡松联合孟鲁斯特治疗支气管哮喘患儿对临床疗效、免疫功能的影响。方法：选取我院自2011年1月至2013年12月收治的哮喘患儿102例,按治疗方法的不同分为试验组及对照组,各51例。对照组患儿给予沙美特罗替卡松粉吸入剂,试验组在此基础上给予口服孟鲁司特钠。观察患儿治疗前后临床疗效及免疫功能的情况。结果：试验组患儿治疗总有效率为96．1％,对照组患儿治疗后总有效率为82．4％,试验组患儿治疗后总有效率显著优于对照组,差异有统计学意义（P＜0．05）。两组患儿治疗前肺功能达标率,差异无统计学意义（P＞0．05）。试验组患儿治疗3个月及治疗后3个月肺功能达标率显著优于对照组患儿,差异有统计学意义（ P＜0．05）。两组患儿治疗前IL－4、INF－γ、IgE、EOS无显著差异,差异无统计学意义（ P＞0．05）。两组患儿治疗3个月及治疗后3个月肺功能IL－4、IgE及EOS水平均较治疗前明显降低,而INF－γ较治疗前明显升高（P＜0．05）,试验组患儿治疗3个月及治疗后3个月肺功能IL－4、IgE及EOS水平降低及INF－γ升高有显著差异,差异有统计学意义（ P＜0．05）。结论：应用沙美特罗替卡松联合孟鲁斯特治疗小儿哮喘具有明显疗效,安全性较好,依从性好,值得临床推广。