洛伊斯-迪茨综合征亚型表现出明显的临床行为和大动脉细胞转录形状
Albert J Pedroza1, Alex R Dalal1, Jennifer Kim1
1Department of Cardiothoracic Surgery, Stanford University School of Medicine, Stanford, Calif.
JTCVS open
|September 9, 2025
概括
洛伊斯-迪茨综合征亚型在大动脉根置换后显示不同的结果. 在TGFBR1/2和SMAD3变异中的遗传差异影响平滑肌肉细胞行为和大动脉脆弱性.
科学领域:
- 心血管外科心血管外科
- 遗传学 是一个遗传学.
- 分子生物学分子生物学
背景情况:
- 洛伊斯-迪茨综合征 (LDS) 是一组影响连接组织的遗传疾病,导致大动脉动脉瘤和剖析.
- 在不同的基因亚型中,LDS的临床严重程度和结果在不同基因亚型之间存在显著差异.
- 大动脉根置换是LDS患者的关键干预措施,以预防灾难性的大动脉事件.
研究的目的:
- 调查Loeys-Dietz综合征中亚型特定的大动脉脆弱性背后的机制.
- 为了将大动脉根替代术后的纵向临床结果与大动脉光滑肌细胞的转录形状相关联.
- 为了比较TGFBR1/2和SMAD3变异的LDS患者之间的光滑肌肉细胞表型.
主要方法:
- 在62名LDS患者 (36名TGFBR1/2,16名SMAD3,7名TGFB2/TGFB3) 中对大动脉根置换结果的回顾性审查.
- 分析了中期存活率和远端大动脉事件率 (干预,动脉瘤,剖析).
- 单细胞RNA测序是在TGFBR1/2和SMAD3变异患者的大动脉动脉瘤组织上进行的.
主要成果:
- 对TGFBR1/2患者的估计5年和10年生存率为97%/86%,大动脉事件发生率为17%/28%.
- SMAD3患者在5年和10年生存率为94%,大动脉事件发生率为0%.
- 转录组分析揭示了不同的光滑肌肉细胞表型:TGFBR1/2显示了收缩基因保留和丰富的原,而SMAD3显示了骨质突变和炎症通路激活.
结论:
- 洛伊斯-迪茨综合征亚型在上大动脉根置换后表现出不同的临床结果.
- 在光滑肌肉细胞中,明显的基因失调模式与亚型特定的大动脉脆弱性相关.
- 这些发现表明,光滑肌肉细胞与细胞外矩阵相互作用在LDS的临床异质性中起作用.
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