一种新的双性LCK变体导致严重的T细胞免疫缺陷和文献审查
Anna-Lisa Lanz1, Serife Erdem2,3, Alper Ozcan3
1Division of Pediatric Immunology and Rheumatology, Department of Pediatrics, Dr. von Hauner Children's Hospital, University Hospital, Ludwig-Maximilians-Universität München, Lindwurmstrasse 4, 80337, Munich, Germany.
Journal of clinical immunology
|December 15, 2023
概括
完全的LCK缺乏症,一种罕见的T细胞免疫疾病,在患有新型突变的患者中被确定. 减少CD4/CD8表达有助于检测LCK缺乏症.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 遗传学 遗传学 是一个
背景情况:
- 淋巴细胞特异性蛋白氨酸激酶 (LCK) 对于T细胞受体 (TCR) 信号传递至关重要.
- 完全的LCK缺乏症非常罕见,以前只描述过一个病例.
- 放松LCK与免疫缺陷和癌症有关.
研究的目的:
- 报告第二个完全LCK缺陷病例.
- 鉴定遗传原因并描述临床表型.
- 调查对TCR信号传递和T细胞群体的影响.
主要方法:
- 整体外基因组测序 (WES) 用于识别遗传突变.
- 对LCK蛋白表达和酸化的分析.
- 流细胞测量以评估T细胞群和表面标记物表达 (CD4,CD8).
主要成果:
- 在LCK中发现了一种新的致病性双基误解突变 (c.1393T>C,p.C465R).
- 突变导致没有LCK蛋白表达和酸化,损害了近端TCR信号传递.
- 观察到严重的T细胞缺乏,CD4+/CD8+T细胞减少,T细胞亚群百分比变化.
- 患者和异卵性母亲的CD4和CD8表面表达减少.
结论:
- 完全的LCK缺乏症表现为严重的T细胞免疫缺陷和受损的TCR信号传递.
- 减少CD4和CD8表面表达是LCK缺乏症的潜在生物标志物.
- 这一发现扩大了对LCK在T细胞发育和免疫力中的作用的理解.
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