JACC:新型降脂药培拉卡森对脂蛋白(a)胆固醇和LDL-C的影响

2022-03-22 网络 网络

脂蛋白(a)[Lp(a)]自发现以来约60年,现在被认为是心血管疾病的一个遗传的、独立的、可能是因果关系的危险因素。

脂蛋白(a)[Lp(a)]自发现以来约60年,现在被认为是心血管疾病的一个遗传的、独立的、可能是因果关系的危险因素。Lp(a)是初级预防环境中的一个危险因素,也是服用他汀类药物和参加PCSK9抑制剂试验的患者的危险因素。预计Lp(a)每降低5mg/dL可降低2.5%的事件发生率。

在先前对培拉卡森的研究中,观察到它不仅能降低Lp(a),还能将载脂蛋白(a)[apo(a)]和载脂蛋白B-100(apoB)上的氧化磷脂(OxPL)降低70%-88%,以及降低26%的低密度脂蛋白水平(LDL-C),16%的apoB。

LDL-C的实验室检测通常包括LDL-C和脂蛋白(a)胆固醇[Lp(a)-C]含量。为了评估培拉卡森对直接测量的Lp(a)-C和按其Lp(a)-C含量校正的LDL-C的影响,来自加州大学圣地亚哥分校医学部心血管医学科的专家开展了相关研究,结果发表在JACC杂志上。

研究人员纳入有心血管疾病史和Lp(a)升高的受试者,将其随机分为5组,分贝给予每月累计剂量为20-80mg的培拉卡森与安慰剂。使用针对脂蛋白(a)的LPA4-磁珠对分离的脂蛋白(a)进行直接的脂蛋白(a)-C测量。LDL-C被报告为:1)临床实验室报告的LDL-C;2)LDL-Corr=实验室报告的LDL-C-直接Lp(a)-C;以及3)LDL-CorrDahlén=实验室LDL-C-[Lp(a)质量×0.30]由Dahlén公式估计。

结果显示,各组的基线中位脂蛋白(a)-C值在11.9-15.6mg/dL之间。与安慰剂相比,培拉卡森导致Lp(a)-C的剂量依赖性下降(2% vs -29% to -67%;P = 0.001-<0.0001)。基线实验室报告的平均LDL-C范围为68.5-89.5 mg/dL,而LDL-Corr范围为55-74 mg/dL。

培拉卡森使LDL-C的平均百分比/绝对值变化为-2%至-19%/-0.7至-8.0 mg/dL(P = 0.95-0.05),实验室报告的LDL-C为-7%至-26%/-5.4至-9.4 mg/dL(P = 0.44-<0.0001),LDL-CorrDahlén增加3.1%至28.3%/0.1至9.5 mg/dL(P = 0.006-0.50)。总apoB下降了3%-16%(P = 0.40-<0.0001),但非Lp(a)apoB没有明显变化。

培拉卡森明显降低直接Lp(a)-C,对LDL-Corr有中性至轻度的降低。在Lp(a)升高的患者中,LDL-Corr比实验室报告的LDL-C或Dahlén公式能更准确地反映LDL-C的变化。

 

参考文献:

Effect of Pelacarsen on Lipoprotein(a) Cholesterol and Corrected Low-Density Lipoprotein Cholesterol. J Am Coll Cardiol. 2022 Mar, 79 (11) 1035–1046

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    2023-02-25 hbwxf
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    2022-03-23 Boyinsh
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    2022-03-23 zhwj
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近日,Journal of Diabetes发表一项中国研究,表明在社区一般人群中,较高的LDL-C水平与糖尿病发病风险升高呈线性相关。

急性脑梗,最适LDL-C多高?天坛医院团队研究

研究表明,对于急性缺血性脑卒中(脑梗死)患者来说,当LDL-C为2.67 mmol/L时,死亡风险最低。