Director and Head of Cardiology, Fortis Flt Lt Rajan Dhall Hospital New Delhi, 11-0070, India.
Indian Heart J. 2024 Mar;76 Suppl 1(Suppl 1):S117-S120. doi: 10.1016/j.ihj.2023.12.010. Epub 2023 Dec 29.
Lp(a) is a genetically determined, heritable, independent and causal risk factor for ASCVD. About 1 in 5 people worldwide have elevated Lp(a) (>50 mg/dL or >125 nmol/L) whereas in Indians it is 25 %. Epidemiological, genome-wide association and mendelian randomization studies have demonstrated an association between elevated Lp(a) levels and increased incidence of myocardial infarction, aortic valve stenosis, ischemic stroke, heart failure, CV and all-cause mortality. The increased Lp(a)-mediated CV risk is mediated by pro-inflammatory, pro-thrombotic and pro-atherogenic processes, leading to progression of atherosclerosis and increased risk of thrombosis. Lp(a) level reaches peak by 5 years of age and remains stable over time. Levels are not much influenced by dietary and environmental factors but it can vary in certain clinical situations like thyroid diseases, chronic kidney disease, inflammation and sepsis. It should be measured at least once in life time. Cascade testing for high Lp(a) is recommended in the settings of FH, family history of (very) high Lp(a), and personal or family history of ASCVD. In the absence of specific Lp(a)-lowering therapies, comprehensive risk factor management is recommended as per guidelines for individuals with elevated Lp(a). PCSK9 inhibitors and Inclisiran reduce Lp(a) by 25%. Pelacarsen is an antisense oligonucleotide and is found to reduce Lp(a) by 80%. In a recent Indian study of 1,021 CAD patients, presence of elevated Lp(a) (>50 mg/dL) correlated with severe angiographic disease. 37% of ACS patients exhibited elevated Lp(a) and it was higher in young CAD patients with FH (43%).
脂蛋白(a)(Lp(a))是一种由遗传决定的、可遗传性的、独立的、与 ASCVD 相关的致病因素。全世界约有 1/5 的人脂蛋白(a)升高(>50mg/dL 或>125nmol/L),而在印度这一比例为 25%。流行病学、全基因组关联和孟德尔随机化研究表明,脂蛋白(a)水平升高与心肌梗死、主动脉瓣狭窄、缺血性卒中等心血管疾病(CVD)和全因死亡率增加有关。升高的脂蛋白(a)介导的 CVD 风险是通过促炎、促血栓形成和促动脉粥样硬化过程介导的,导致动脉粥样硬化进展和血栓形成风险增加。脂蛋白(a)水平在 5 岁时达到峰值,并随时间保持稳定。饮食和环境因素对其水平影响不大,但在某些临床情况下,如甲状腺疾病、慢性肾脏病、炎症和败血症,其水平可能会发生变化。一生中至少应测量一次脂蛋白(a)。FH、脂蛋白(a)极高的家族史和 ASCVD 的个人或家族史,建议进行高脂蛋白(a)的级联检测。鉴于目前缺乏特异性降低脂蛋白(a)的治疗方法,建议根据指南对脂蛋白(a)升高的个体进行综合危险因素管理。PCSK9 抑制剂和 Inclisiran 可降低脂蛋白(a)水平 25%。Pelacarsen 是一种反义寡核苷酸,可降低脂蛋白(a)水平 80%。最近在一项针对 1021 名 CAD 患者的印度研究中,脂蛋白(a)升高(>50mg/dL)与严重的血管造影疾病相关。37%的 ACS 患者脂蛋白(a)升高,且伴有 FH 的年轻 CAD 患者脂蛋白(a)更高(43%)。
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