Mehiläinen Airport Health Centre, 01530, Vantaa, Finland; University of Helsinki, Department of Forensic Medicine, 00014, Helsinki, Finland.
School of Medicine, Faculty of Medicine and Health Sciences, University of Western Australia, Perth, Australia; Lipid Disorders Clinic, Department of Cardiology, Royal Perth Hospital, Perth, Australia.
Atherosclerosis. 2019 Feb;281:25-30. doi: 10.1016/j.atherosclerosis.2018.11.040. Epub 2018 Dec 7.
A large number of epidemiological studies in ethnically diverse populations show that lipoprotein(a) [Lp(a)] levels above 30-50 mg/dL are significantly associated with calcific aortic valve stenosis, although less so in African Americans. Patients with heterozygous familial hypercholesterolemia (he-FH) have a marked lifelong elevation of serum low-density lipoprotein cholesterol (LDL-C) level, and the prevalence of aortic valve calcification (AVC) is at least two-fold higher among adult he-FH patients compared with healthy controls. Additionally, Lp(a) levels above 50 mg/dL were recently found to be an independent risk factor for AVC among asymptomatic statin-treated he-FH patients. Given that worldwide an estimated 1.4 billion people have an Lp(a) level over 50 mg/dL, and that one out of 250 individuals has he-FH, then globally about 5 million he-FH patients should have an Lp(a) level higher than 50 mg/dL. However, because Lp(a) levels are, on average, significantly higher in he-FH patients than the general population, the actual number of he-FH patients with such high Lp(a) levels must be even higher. We proposed recently that Lp(a) life-years is a useful metric of cumulative burden of risk for atherosclerotic cardiovascular disease (ASCVD), and now posit that this metric may be extended to the development of AVC. The Lp(a) life-years illustrates the age-dependent exposure to a given Lp(a) level (years x mg/dL). Effective novel pharmacotherapies using apo(a) antisense oligonucleotides (ASOs) or small interfering RNA (siRNA)-based therapies targeting the hepatic expression of apo(a) offer unprecedented potential for significant reduction in the cumulative exposure of the aortic valves to Lp(a), and need to be tested in controlled clinical trials on the progression of AVC.
大量在不同种族人群中进行的流行病学研究表明,脂蛋白(a)[Lp(a)]水平高于 30-50mg/dL 与钙化性主动脉瓣狭窄显著相关,尽管在非裔美国人中相关性较低。杂合子家族性高胆固醇血症(he-FH)患者的血清低密度脂蛋白胆固醇(LDL-C)水平终生显著升高,与健康对照组相比,成年 he-FH 患者的主动脉瓣钙化(AVC)患病率至少高两倍。此外,最近发现,在无症状他汀类药物治疗的 he-FH 患者中,Lp(a)水平高于 50mg/dL 是 AVC 的独立危险因素。鉴于全世界估计有 14 亿人 Lp(a)水平高于 50mg/dL,而每 250 人中就有 1 人患有 he-FH,那么全球约有 500 万 he-FH 患者的 Lp(a)水平应高于 50mg/dL。然而,由于 he-FH 患者的 Lp(a)水平平均明显高于普通人群,因此具有如此高 Lp(a)水平的 he-FH 患者的实际数量肯定更高。我们最近提出,Lp(a)寿命年是评估动脉粥样硬化性心血管疾病(ASCVD)风险累积负担的有用指标,现在假设该指标可以扩展到 AVC 的发展。Lp(a)寿命年说明了与特定 Lp(a)水平相关的年龄依赖性暴露(年×mg/dL)。使用载脂蛋白(a)反义寡核苷酸(ASO)或针对载脂蛋白(a)肝表达的小干扰 RNA(siRNA)为基础的治疗的新型有效药物治疗为显著降低主动脉瓣对 Lp(a)的累积暴露提供了前所未有的潜力,并且需要在控制临床试验中测试对 AVC 进展的影响。
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