功能获取 NOTCH4 变种在全身性硬化症中破坏血管生成
Urvashi Kaundal1, Pei-Suen Tsou2, Mousumi Sahu1
1Scleroderma Genomics and Health Disparities Unit, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, MD, USA.
Annals of the rheumatic diseases
|February 5, 2026
概括
NOTCH4中的遗传变异与全身性硬化症 (SSc) 血管病变有关,特别是在非裔美国患者中. 抑制NOTCH4信号传递对治疗SSc血管和纤维化并发症有希望.
科学领域:
- 遗传学 遗传学是一种遗传学.
- 免疫学 免疫学 免疫学
- 血管生物学 血管生物学
背景情况:
- 系统性硬化症 (SSc) 的特点是血管病变和纤维化,未知遗传因素导致严重疾病,特别是在非裔美国人 (AA) 群体中.
- 患有SSc的AA患者往往表现出更严重的血管表型和更差的结果,需要对潜在的遗传原因进行调查.
研究的目的:
- 调查严重血管病变和非裔美国人SSc.患者的不良结果的遗传基础.
- 探索NOTCH4在SSc病变发生中的作用,并评估针对血管病变的NOTCH4导向疗法.
主要方法:
- 基于基因的测试和外体范围的显著性分析确定了与SSc.相关的NOTCH4变体.
- 用单细胞RNA测序,功能测定和小鼠模型来研究NOTCH4在内皮转移到介质细胞转变 (EndoMT) 和血管生成中的作用.
- 分析包括在AA患者中丰富的特定风险单元型和NOTCH4抑制策略的评估.
主要成果:
- 在AA患者中,NOTCH4变异对SSc和严重血管疾病具有外体范围的意义.
- 一个特定的NOTCH4风险单元型在AA患有SSc的患者中显著丰富,具有相当大的人口归因风险.
- 与SSc相关的NOTCH4变体增加了NOTCH4的表达,导致血管生成减少和EndoMT增加;抑制NOTCH4信号传递挽救了这些效应.
结论:
- NOTCH4变异与SSc病变和血管病变有关,可能解释AA个体中SSc患病率和严重程度较高.
- 针对NOTCH4途径为SSc的血管和纤维化表现提供了潜在的治疗策略.
- 进一步的研究和临床试验是有必要的,以探索NOTCH4抑制的SSc治疗.
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