Circulation:血浆细胞游离DNA预测肺动脉高压的生存并绘制特定的损伤来源

2022-09-12 刘少飞 MedSci原创

无细胞DNA(cfDNA)是细胞损伤的一种非侵入性标志物。它在肺动脉高压(PAH)中的意义尚不清楚。

研究目的:

无细胞DNA(cfDNA)是细胞损伤的一种非侵入性标志物。它在肺动脉高压(PAH)中的意义尚不清楚。

研究方法:

在2个PAH队列(A,n=48;B,n=161)和对照组(n=48)测量血浆cfDNA。收集数据用于REVEAL 2.0(评估早期和长期PAH疾病管理的登记处)的评分和结果测定。患者被分为以下REVEAL风险组:低(≤6)、中(7-8)和高(≥9)。通过单因素方差分析比较对照组和PAH风险组之间的cfDNA总浓度。Log-rank测试比较了cfDNA分层和REVEAL风险组之间的生存率。接收者操作特征曲线下的区域是由逻辑回归模型估计的。队列B(n=96)和对照组(n=16)的样本子集进行了亚硫酸氢盐测序,然后用去卷积算法绘制细胞特异性cfDNA甲基化模式,用检验法比较浓度。
研究结果:

在队列A中,中位数(四分位数范围)年龄为62岁(47-71),75%为女性,而REVEAL 2.0中为6(4-9)。在队列B中,中位数(四分位数范围)年龄为59岁(49-71),69%为女性,而REVEAL 2.0中为7(6-9)。在两个队列中,不同REVEAL风险的PAH患者和对照组之间的cfDNA浓度不同(方差分析≤0.002),与低风险类别相比,高风险患者的cfDNA浓度更高(≤0.002)。在队列B中,最低、中间和最高cfDNA分层的54名患者中有14名死亡或肺移植,53名中有23名,54名中有35名。cfDNA水平分层为分层(log-rank:=0.0001)和REVEAL风险组(log-rank:<0.0001)分别预测无移植生存。在REVEAL中加入cfDNA可提高辨别能力(接受者操作特征曲线下的面积,0.72-0.78;=0.02)。与对照组相比,PAH患者的甲基化分析显示源自红细胞祖细胞、中性粒细胞、单核细胞、脂肪细胞、自然杀伤细胞、血管内皮和心肌细胞的cfDNA增加(Bonferroni调整后<0。 05)。来自红细胞祖细胞、心肌细胞和血管内皮细胞的cfDNA浓度在高风险与低风险REVEAL评分的PAH患者中更大(≤0.02)。



研究结论:

循环中的cfDNA在PAH患者中升高,与疾病的严重程度相关,并可预测更差的生存。PAH患者的cfDNA甲基化分析结果与目前流行的疾病发病机制范式一致。

 

参考文献:

Brusca SB, Elinoff JM, Zou Y, Jang MK, Kong H, Demirkale CY, Sun J, Seifuddin F, Pirooznia M, Valantine HA, Tanba C, Chaturvedi A, Graninger GM, Harper B, Chen LY, Cole J, Kanwar M, Benza RL, Preston IR, Agbor-Enoh S, Solomon MA. Plasma Cell-Free DNA Predicts Survival and Maps Specific Sources of Injury in Pulmonary Arterial Hypertension. Circulation. 2022 Aug 25:101161CIRCULATIONAHA121056719. doi: 10.1161/CIRCULATIONAHA.121.056719. Epub ahead of print. PMID: 36004627.

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    2023-03-16 榆木头 来自江苏省

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    2022-09-12 LSJ116

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旨在全面描述MEMS-HF参与者在植入传感器期间的心肺血流动力学特征,并澄清他们对PAP引导的RPM的反应是否因PH的存在和/或个别血流动力学PH亚型而有所不同。

镁对肺动脉高压模型鼠肺动脉钙化的抑制作用

血管钙化被认为是肺动脉高压的一个潜在治疗目标。Mg2+对钙化有保护作用。本研究旨在研究Mg2+是否能通过减少肺动脉内侧钙化来缓解肺动脉高压。