JACI:常染色体显性遗传病个体基因突变或损伤机体免疫细胞功能

2013-07-22 T.Shen JACI

近日,来自悉尼Garvan医学研究所的研究人员通过研究表示,对单一基因突变的免疫缺陷患者进行研究或许可以获取更多关于免疫系统研究的信息,尤其是当患者实际的针状和临床预期不太一样的时候,就更要去深入研究其中的机制,相关研究刊登于国际杂志Journal of Allergy and Clinical Immunology上。 文章中,研究者对常染色体显性高IgE综合征进行了研究,该疾病是基因STAT

近日,来自悉尼Garvan医学研究所的研究人员通过研究表示,对单一基因突变的免疫缺陷患者进行研究或许可以获取更多关于免疫系统研究的信息,尤其是当患者实际的针状和临床预期不太一样的时候,就更要去深入研究其中的机制,相关研究刊登于国际杂志Journal of Allergy and Clinical Immunology上。

文章中,研究者对常染色体显性高IgE综合征进行了研究,该疾病是基因STAT3发生突变导致的,这使得患者更易发生淋巴瘤,实验室和动物模型研究预测这种疾病的患者对病毒和癌症会更加易感,而实际情况并不是这样。

研究人员Megan Ives及其同事研究发现,常染色体显性高IgE综合征个体相比预期来说,其免疫系统具有更强的代偿能力,研究者预测患者机体中会较少产生具有功能的杀伤性T细胞,杀伤性T细胞是一种可以杀灭入侵微生物和癌症细胞的机体免疫细胞。

研究者Elissa Deenick说道,在正常情况下STAT3分子可以在T细胞中传输生化信号,这种信号可以指导STAT3分子开启其杀灭功能,但是在高IgE病人中,其由于缺少STAT3基因,这种信号大部分时间采用“声东击西的策略”,看似工作实际上并无功能。杀伤性T细胞需要特定的分子来变得更为有效,尤其是对付病毒和淋巴瘤;而高IgE患者就不能产生必备的信号来产生这些效应分子。

研究者认为这项研究非常重要,因为其揭示了通过小鼠模型获得的结果和人类真正感染后的结果二者之间的差异;研究者的研究工作可以帮助我们理解为何高IgE病人的情况并不是不好,不好的情况只是研究者对其病情的预测而已;研究结果对于临床研究非常重要,因为其为我们提供了病人实际的情况,方便医生们根据实际病情进行治疗。

原始出处:

Ives ML, Ma CS, Palendira U, Chan A, Bustamante J, Boisson-Dupuis S, Arkwright PD, Engelhard D, Averbuch D, Magdorf K, Roesler J, Peake J, Wong M, Adelstein S, Choo S, Smart JM, French MA, Fulcher DA, Cook MC, Picard C, Durandy A, Tsumura M, Kobayashi M, Uzel G, Casanova JL, Tangye SG, Deenick EK.Signal transducer and activator of transcription 3 (STAT3) mutations underlying autosomal dominant hyper-IgE syndrome impair human CD8+ T-cell memory formation and function.J Allergy Clin Immunol. 2013 Jul 4. doi:pii: S0091-6749(13)00847-6. 10.1016/j.jaci.2013.05.029.

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近期,中科院武汉病毒研究所王汉中课题组在人博卡病毒(HBoV)调控宿主天然免疫反应机制的研究中取得重要进展。研究表明,HBoV的结构蛋白VP2能够通过抑制I型干扰素通路上的负反馈调节因子RNF125来增强IFN-b生成。相关结果已发表于国际免疫学期刊The Journal of Immunology上。 大量的临床研究表明,HBoV主要感染两岁以下的婴幼儿,并常与其它呼吸道病毒混合感染。HBoV

New Scientist:科学家称裸鼹鼠体内神秘物质具有癌症免疫性

据英国新科学家杂志报道,如果与裸鼹鼠的身体大小作为参照对比,人类的寿命将达到600岁。与老鼠体型接近的裸鼹鼠生活在非洲的地下环境,它们的寿命可达到30岁。令科学家感到兴趣的是,这种丑陋的哺乳动物不会患癌症,目前,科学家最新研究揭晓了它们不会患有癌症的秘密,这将对治疗癌症患者提供了重要线索。 科学家最新研究揭晓了裸鼹鼠癌症免疫性的秘密,体内高分子质量透明质酸(HMM-HA)可阻止肿瘤细胞生长 美

AR:呼吸系统是自身免疫的早期靶点还是自身免疫的起始部位?

来自美国科罗拉多大学的M. Kristen Demoruelle等人进行了一项研究,该研究的目的是评价类风湿关节炎(RA)相关抗体阳性而无炎性关节炎的患者呼吸系统异常的发生情况。研究结果在线发布在2012年6月的《关节炎与风湿病》(ARTHRITIS & RHEUMATISM)杂志上。作者发现,呼吸道异常与炎症都常见于自身抗体阳性而无炎性关节炎的受试者,并且与早期RA患者并发的呼吸系统异常

Nature:对小肠细菌的免疫反应

最近被定性的“先天淋巴细胞”(ILCs) 在功能上可被划分成三类。第一类的ILCs 产生干扰素-γ;第二类的ILCs 表达白介素-5、白介素-13和双调蛋白;第三类的ILCs 产生白介素-17A和白介素-22。ILCs在适应性免疫存在时的功能及它们影响适应性免疫细胞反应的潜力在很大程度上是不知道的。现在用小鼠所做的一项研究显示,第三类的ILCs处理和呈现抗原,并通过一个依赖于“MHC-class-