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Eur Heart J:多学科讨论:极高浓度的“好”胆固醇也有害

2017-09-25 佚名 环球医学

丹麦科学家进行的两项前瞻性队列研究表明,极高的高密度脂蛋白胆固醇(HDL-C)与男性和女性高死亡率相关。目的:不同浓度的HDL-C与心血管疾病和死亡率负相关,但是遗传证据表明,极高浓度反而会导致更多的心血管疾病。研究者检验了假设,即极高浓度的HDL-C与较高的男性和女性全因死亡率相关。方法和结果:总共52268名男性和64240名女性从两项前瞻性基于人群的研究(哥本哈根市心脏研究和哥本哈根普通人群



丹麦科学家进行的两项前瞻性队列研究表明,极高的高密度脂蛋白胆固醇(HDL-C)与男性和女性高死亡率相关。

目的:不同浓度的HDL-C与心血管疾病和死亡率负相关,但是遗传证据表明,极高浓度反而会导致更多的心血管疾病。研究者检验了假设,即极高浓度的HDL-C与较高的男性和女性全因死亡率相关。

方法和结果:总共52268名男性和64240名女性从两项前瞻性基于人群的研究(哥本哈根市心脏研究和哥本哈根普通人群研究)中招募。745452人-年的随访期,男性的全因死亡数为5619[死亡率,17.1/1000人年(95% CI,16.7~17.6)],女性为5059[12.1/1000人年(11.8~12.4)]。男性和女性的HDL-C浓度和全因死亡率之间的相关性为U型,其中极高和极低浓度与较高的全因死亡风险相关。男性中,与最低的全因死亡率相关的HDL-C浓度为1.9mmol/L(95% CI,1.4~2.0)[73mg/dL(54~77)],女性为2.4mmol/L(1.8~2.5)[93mg/dL(69~97)]。与最低风险的患者相比,HDL-C为2.5~2.99mmol/L(97~115mg/dL)的男性的全因死亡率的多因素调整风险比为1.36(1.09~1.70),HDL-C≥3.0mmol/L(116mg/dL)的男性为2.06(1.44~2.95)。对于女性,HDL-C为3.0~3.49mmol/L(116~134mg/L)的风险比为1.10(0.83~1.46),HDL-C≥3.5mmol/L(135mg/dL)的女性为1.68(1.09~2.58)。

结论:普通人群中,具有极高HDL-C浓度的男性和女性反而具有较高的全因死亡率。这些结果需要在其他研究中证实。

多学科讨论记实:

本研究的结果可能对HDL-C浓度极高的个体有临床意义。首先,当HDL-C用于风险评估时,医生应意识到极高HDL-C者可能是全因死亡的高风险组。当前指南推荐风险评估,以及在初始降脂治疗之前测量HDL-C水平。本研究的结果表明,“HDL-C浓度越高越好”的普遍观点不适用于极高浓度,因为HDL浓度的整个范围中,HDL-C与全因死亡之间的关系不是线性的。第二,如果极高HDL-C与死亡高风险之间是因果关系,这些发现将增加“药物提高HDL-C至极高浓度”的不确定性。一些研制的CETP抑制剂能增加HDL-C至极高浓度,在本研究中与更高的死亡率相关。有趣的是,CETP抑制剂托彻普的研发中断,因为其增加死亡率,尽管这可能是由于脱靶效应。然而,当前结果指向一个替代解释:极高HDL-C本身就是高死亡率的原因。

由于这是一项观察性研究,不能确定极高HDL-C与较高死亡率之间的相关性是否为因果关系。此相关性可能是由于未测量的混杂因素或逆向因果关系。然而,排除了随访期第1~5年内去世的个体的分析结果似乎不能表明逆向因果关系。另一个局限性在于极高HDL浓度相对罕见;然而,2.5%最高HDL-C的男性的死亡风险全部增加。尽管纳入本研究的个体数量非常大,极高HDL-C组的人数较少,限制了统计功效,尤其是分层分析和病因特异性死亡分析,并在这些极端上影响模型拟合。最后,研究者仅纳入丹麦血统的白人个体,结果不一定适用于其他地理区域或种族。

原始出处:

Christian M.Madsen,Anette Varbo,et al.Extreme high high-density lipoprotein cholesterol is paradoxically associated with high mortality in men and women: two prospective cohort studies.European Heart Journal, 21 August 2017

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    2017-11-13 情途末路

    学习了.获益匪浅!感谢分享

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    2017-09-27 zhaojie88
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    2017-09-27 slcumt
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    2017-09-26 yfjms

    学习了

    0

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