Circulation:射血分数保留型心衰的心肌基因表达特征!

2021-01-12 MedSci原创 MedSci原创

射血分数保留型心衰(HFpEF)占所有HF的一半,但仍缺乏有效的治疗方法。因缺乏心脏组织的分子分析,目前对心肌生物学的了解仍有限。

射血分数保留型心衰(HFpEF)占所有HF的一半,但仍缺乏有效的治疗方法。因缺乏心脏组织的分子分析,目前对心肌生物学的了解仍有限。

Hahn等收集了41例HFpEF患者、30例射血分数降低型心衰(HFrEF)患者和24例对照的右心室活检样本,予以RNA测序,分析了组间转录组差异、共患病的影响,以及通路富集的差异基因表达。

HFpEF患者多为女性(59%)、非裔美国人(68%)、肥胖个体(中位体重指数 41)和高血压(98%)、NYHA3级或4级(65%);HFpEF患者几乎都采用袢利尿剂治疗,70%的患者既往因心衰住过院。主成分分析可以最小的重叠将HFpEF与HFrEF和供体对照分开,且根据体重指数、性别、年龄、糖尿病或肾功能校正后这一情况仍持续存在。分层聚类确认了群分离。

HFpEF组和HFrEF组之间的转录差异

与供体对照相比,HFpEF组有近一半的基因发生了显著改变(1882个上调,2593个下调),这些基因在HFrEF组有相同的改变方向;然而,在HF组之间有5745个基因发生了独特的改变。

HFpEF组和HFrEF组在信号通路上的基因表达差异

与对照相比,HFpEF中特异性上调的基因富集于线粒体三磷酸腺苷合成/电子传递通路,该通路基因在HFrEF组中下调HFpEF组特异性下调基因富集于内质网应激、自噬和血管生成。体重指数的差异在很大程度上解释了HFpEF组上调的基因,然而,无论是这种还是更广泛的共患病校正,都没有改变下调基因富集的通路。

HFpEF转录组的3个亚群

非负矩阵因子分解鉴定出了3个HFpEF转录组亚群,它们具有独特的通路和临床相关性,包括与HFrEF高死亡率最相关的一组,以及一组以较小心脏女性为主的促炎症信号。

综上所述,HFpEF表现出具有特定临床特征和预后的独特的广泛转录组特征和分子亚群。该数据为精准治疗提供了新的信号靶点。

原始出处:

Virginia S. Hahn, et al. Myocardial Gene Expression Signatures in Human Heart Failure With Preserved Ejection Fraction. Circulation. 2021;143:120–134

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    2023-11-24 mzeng1 来自云南省

    学习了👍

    0

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    2021-01-22 lifefamily

    #心衰#这个研究有价值,接下来还应该分析#蛋白质组学#差异

    0

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单细胞分析确定了从内皮细胞到造血干细胞前体的轨迹,并确定了中间阶段。 动脉血源性内皮细胞产生两波CD45+细胞;早期的一波是祖细胞,随后是造血干细胞前体。

Circulation:单细胞进展轨迹重建揭示了病理性心肌肥厚的干预原则

压力超负荷诱导的病理性心肌肥厚是心脏衰竭的常见前症;心衰仍是最主要的心血管疾病,全世界的发病率和死亡率均在不断增长。目前的治疗通常包括部分减轻心衰发作后的心脏负荷。因此,更多的针对发病机制、分期和细胞

Circulation:单细胞测序揭示参与心室重构的成纤维细胞亚群

心脏成纤维细胞(CFs)在与不同类型纤维化相关的心室重构过程中都起着核心作用。近期研究表明,成纤维细胞对心脏损伤的反应具有异质性。鉴于成纤维细胞的标志物有限,因此目前仍缺乏对心脏损害应答的成纤维细胞群