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Circulation:γδT细胞介导血管紧张素II诱导的高血压和血管损伤

2017-03-31 MedSci MedSci原创

抗原呈递细胞和适应性免疫T细胞已被报道参与高血压的发展。然而,涉及高血压病理生理学的T淋巴细胞亚群仍不清楚。近期加拿大学者发表研究文章于著名血管期刊Circulation,研究一小部分表达γδT细胞受体(TCR)而不是αβTCR的固有T细胞亚群可能在高血压免疫应答中起作用。本研究目的是确定血管紧张素(Ang)II是否引起γδT细胞的动态变化,γδT细胞缺失阻断Ang II诱导的高血压、血管损伤和T

抗原呈递细胞和适应性免疫T细胞已被报道参与高血压的发展。然而,涉及高血压病理生理学的T淋巴细胞亚群仍不清楚。

近期加拿大学者发表研究文章于著名血管期刊Circulation,研究一小部分表达γδT细胞受体(TCR)而不是αβTCR的固有T细胞亚群可能在高血压免疫应答中起作用。本研究目的是确定血管紧张素(Ang)II是否引起γδT细胞的动态变化,γδT细胞缺失阻断Ang II诱导的高血压、血管损伤和T细胞活化,γδT细胞是否与人类高血压相关。

给予雄性C57BL/6野生型(WT)小鼠和缺失γδT细胞的Tcrδ-/-小鼠,或注射了对照IgG或γδT细胞消耗性抗体的WT小鼠注射Ang II无、或3,7,14天处理。通过流式细胞术测定T细胞谱,通过加压造影术、遥测技术和肠系膜动脉内皮功能测定收缩压。TCRγ恒定基因表达水平和全血基因表达微阵列研究(包括血压正常和高血压受试者)的临床资料用于证实γδT细胞与收缩压之间的关联。

7天和14天Ang II处理增加WT小鼠脾脏中γδT细胞的数量和活性(P <0.05)。14天Ang II输注增加WT小鼠收缩压(P <0.01),降低肠系膜动脉内皮功能(P <0.01),而Tcrδ - / - 小鼠中并无两个现象(P <0.01)。与对照IgG处理的Ang II输注小鼠相比, TCRγδ抗体诱导的γδT细胞缺失阻断了Ang II诱导的收缩压升高和内皮功能障碍(P <0.05)。脾脏和血管周围脂肪组织中Ang II诱导的T细胞活化被小鼠Tcrδ - / - 阻断(P <0.01)。在人类,整合全血TCRγ恒定基因表达水平,年龄和性别做多元线性回归模型证实收缩压和γδT细胞之间的关联(R2 = 0.12,P <1×10-6)。

γδT细胞介导Ang II诱导的小鼠收缩压升高,血管损伤和T细胞活化。γδT细胞可能促进人类高血压的发展。

原始出处:Caillon A, Mian MO,et al. Gamma Delta T Cells Mediate Angiotensin II-Induced Hypertension and Vascular Injury.Circulation. 2017 Mar 22. pii: CIRCULATIONAHA.116.027058.

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T细胞淋巴瘤是罕见的非霍奇金淋巴瘤。2016年12月,发表在《J Clin Oncol》的一项由日本科学家进行的研究考察了来那度胺治疗成人T细胞淋巴瘤恶化或复发的安全性和有效性。

Nature:法国学者研究组揭示艾滋病病毒表面隐藏蛋白

2017年3月15日,国际学术权威刊物自然出版集团《Nature》杂志在线发表了法国蒙彼利埃大学Monsef Benkirane研究员的一篇研究论文,研究发现潜藏艾滋病病毒(HIV)的T细胞表面特定表达着一种名叫CD32a的蛋白

2017年3月份生物谷推荐的HIV亮点研究

2017年3月19日/生物谷BIOON/---人类免疫缺陷病毒(human immunodeficiency virus, HIV),即艾滋病(AIDS,获得性免疫缺陷综合征)病毒,是造成人类免疫系统缺陷的一种病毒。1983年,HIV在美国首次发现。它是一种感染人类免疫系统细胞的慢病毒(lentivirus),属逆转录病毒的一种。 HIV通过破坏人体的T淋巴细胞,进而阻断细胞免疫和体

盘点:CRISPR基因编辑技术或有望治疗癌症和HIV等顽疾

CRISPR/Cas系统是大多数细菌与所有的古菌中的一种后天免疫系统,其全名为常间回文重复序列丛集/常间回文重复序列丛集关联蛋白系统,能够以消灭外来的质体或者噬菌体并在自身基因组中留下外来基因片段作为“记忆”。近年来以CRISPR/Cas9为基础的基因编辑技术在一系列基因治疗的应用领域都展现出极大的应用前景,比如艾滋病、血液病、肿瘤等多种人类顽疾;那么近期CRISPR-Cas9基因编辑

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