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家族筛查与高 Lp(a) 的遗传

已审核发布 / Reviewed & published · 裁定 approved
Family screening & the genetics of high Lp(a)审核 medical-reviewer· 2026-07-04· 引用核验 2026-07-04

从一次检测，到整个家庭​

如果你读到这里，很可能是因为自己查出了偏高的脂蛋白(a)（lipoprotein(a)，Lp(a)脂蛋白(a) · Lipoprotein(a)Lp(a)/ˌlaɪpoʊˈproʊtiːn eɪ/一种低密度脂蛋白(LDL)样颗粒，额外通过二硫键连接一个 apolipoprotein(a) 蛋白；血浆水平主要由遗传决定，一生中相对稳定。An LDL-like particle that additionally carries one apolipoprotein(a) molecule bound by a disulfide bond; plasma level is largely genetically determined and stable through life.🧩 词根拆解 / word rootslipo-脂、脂肪 · fat希腊语 lipos 脂肪＋protein蛋白质 · protein希腊语 prōtos 第一/首要＋(a)载脂蛋白(a) 亚型标记 · the apo(a) variant由 LPA 基因编码，常缩写 Lp(a)）。这一课把整个课程的线索收个尾：既然 Lp(a) 几乎是"写在基因里"的，那么它的意义就从来不只关乎你一个人，也关乎你的父母、兄弟姐妹和子女。

Lp(a) 为什么"写在基因里"​

与其他血脂不同，Lp(a) 的血浆浓度超过 90% 由 LPA 基因（LPA gene，LPA geneLPA 基因 · LPA gene/ˌɛl piː ˈeɪ dʒiːn/编码载脂蛋白(a) 的基因；血浆 Lp(a) 浓度超过 90% 由该基因位点的遗传变异决定，其中 kringle IV 2 型重复片段的数目差异是主要来源。The gene encoding apolipoprotein(a); genetic variability at this locus determines >90% of plasma Lp(a) concentration, with differences in the number of kringle IV type-2 repeats as the main driver.🧩 词根拆解 / word rootsLPA编码 apo(a) 的基因名 · the gene symbol for apolipoprotein(a)＋gene基因 · gene希腊语 genos 起源/产生）所在位点的遗传变异决定——依赖基因的程度超过任何其他脂蛋白。[1]Tier 1Kronenberg, Florian et al. Lipoprotein(a) in atherosclerotic cardiovascular disease and aortic stenosis: a European Atherosclerosis Society consensus statement. European Heart Journal 2022doi:10.1093/eurheartj/ehac361 其中，编码载脂蛋白(a)（apolipoprotein(a)，apo(a)载脂蛋白(a) · Apolipoprotein(a)apo(a)/ˌæpoʊˌlaɪpoʊˈproʊtiːn eɪ/Lp(a) 颗粒特有的蛋白，由 LPA 基因编码；含数量可变的 kringle IV 重复，是 Lp(a) 与普通 LDL 的关键结构区别。The protein unique to the Lp(a) particle, encoded by the LPA gene; it contains a variable number of kringle IV repeats, the key structural difference between Lp(a) and ordinary LDL.🧩 词根拆解 / word rootsapo-载（脱辅基蛋白）、来自/衍生 · the protein moiety; from/derived希腊语 apo 离开/由…而来＋lipo-脂、脂肪 · fat希腊语 lipos 脂肪＋protein蛋白质 · protein＋(a)(a) 亚型 · the (a) variant）的一段可变重复片段（kringle IV 2 型重复）的数目，就能解释人群中约 30%–70% 的 Lp(a) 浓度差异。[1]Tier 1Kronenberg, Florian et al. Lipoprotein(a) in atherosclerotic cardiovascular disease and aortic stenosis: a European Atherosclerosis Society consensus statement. European Heart Journal 2022doi:10.1093/eurheartj/ehac361

因为由基因决定，Lp(a) 水平很早就"定型"：LPA 基因在 2 岁时已充分表达，成年人的 Lp(a) 水平通常在约 5 岁时就已达到。[1]Tier 1Kronenberg, Florian et al. Lipoprotein(a) in atherosclerotic cardiovascular disease and aortic stenosis: a European Atherosclerosis Society consensus statement. European Heart Journal 2022doi:10.1093/eurheartj/ehac361 此后，在没有特殊疾病的情况下，一个人的 Lp(a) 水平在一生中不会明显改变。[2]Tier 1Reyes-Soffer, Gissette et al. Lipoprotein(a): a genetically determined, causal, and prevalent risk factor for atherosclerotic cardiovascular disease: a scientific statement from the American Heart Association. Arteriosclerosis, Thrombosis, and Vascular Biology 2022doi:10.1161/ATV.0000000000000147（一个已知的例外是：女性绝经后 Lp(a) 往往有所上升。[1]Tier 1Kronenberg, Florian et al. Lipoprotein(a) in atherosclerotic cardiovascular disease and aortic stenosis: a European Atherosclerosis Society consensus statement. European Heart Journal 2022doi:10.1093/eurheartj/ehac361）正因如此，指南建议每位成年人一生中至少检测一次 Lp(a) 就足以识别风险。[1]Tier 1Kronenberg, Florian et al. Lipoprotein(a) in atherosclerotic cardiovascular disease and aortic stenosis: a European Atherosclerosis Society consensus statement. European Heart Journal 2022doi:10.1093/eurheartj/ehac361

共显性遗传：为什么家人也可能偏高​

Lp(a) 遵循共显性遗传（autosomal codominant inheritance，Autosomal codominant inheritance（常染色体）共显性遗传 · Autosomal codominant inheritance/ˌɔːtəˌsoʊməl ˌkoʊˈdɒmɪnənt ɪnˈhɛrɪtəns/一种遗传方式：来自父母双方的两个等位基因都会各自表达、共同决定表型。对 Lp(a) 而言，血浆水平由两个 LPA 等位基因共显性表达而来，因此一个高 Lp(a) 等位基因可来自父母任一方。A mode of inheritance in which both alleles inherited from the two parents are expressed and jointly determine the phenotype. For Lp(a), plasma levels arise from codominant expression of the two LPA alleles, so a high-Lp(a) allele can come from either parent.🧩 词根拆解 / word rootsauto-自身、常（常染色体，非性染色体） · self; autosome (non-sex chromosome)希腊语 autos 自己＋-somal（染色）体的 · of the (chromo)some希腊语 sōma 体＋co-共同、一起 · together/jointly拉丁语 com- 一起＋dominant显性（会表达出来的） · dominant (expressed)拉丁语 dominari 支配）：一个人从父母双方各继承一个 LPA 等位基因，两个等位基因都会各自表达并共同贡献到最终的 Lp(a) 水平。[2]Tier 1Reyes-Soffer, Gissette et al. Lipoprotein(a): a genetically determined, causal, and prevalent risk factor for atherosclerotic cardiovascular disease: a scientific statement from the American Heart Association. Arteriosclerosis, Thrombosis, and Vascular Biology 2022doi:10.1161/ATV.0000000000000147 这意味着，一个"高 Lp(a)"的等位基因可能来自父亲，也可能来自母亲；也正因为这种共显性遗传模式，对高 Lp(a) 者的家人进行筛查，往往能发现更多同样偏高的人。[2]Tier 1Reyes-Soffer, Gissette et al. Lipoprotein(a): a genetically determined, causal, and prevalent risk factor for atherosclerotic cardiovascular disease: a scientific statement from the American Heart Association. Arteriosclerosis, Thrombosis, and Vascular Biology 2022doi:10.1161/ATV.0000000000000147

换句话说：你偏高的 Lp(a) 很可能不是偶然，而是与至少一位血亲共享的一段基因——他们可能也在不知情中带着同样的风险。

什么时候该提醒家人去查​

这种系统性地"由一个人扩展到其血亲"的家族筛查方法，医学上称为级联筛查（cascade screening，又称 cascade testing，cascade testing级联筛查 · Cascade screeningcascade testing/kæsˈkeɪd ˈskriːnɪŋ/从一位已确诊或指标偏高的先证者出发，系统地检测其血亲（先测一级亲属，再由新发现的高值者向外扩展）的家族筛查策略；用于高效地在家族中找出携带同一遗传性风险的人。A family-screening strategy that starts from an affected or high-value index person and systematically tests their blood relatives (first-degree relatives first, then expanding outward from each newly identified high-value individual), to efficiently find family members carrying the same inherited risk.🧩 词根拆解 / word rootscascade瀑布、逐级传递（像瀑布一样一层层扩散） · waterfall; passed on step by step意大利语 cascata 瀑布＋screen-筛查、筛检 · to screen/sift古法语 escren 遮屏/筛＋-ing…的过程（动名词后缀） · process of (gerund suffix)）。欧洲动脉粥样硬化学会（EAS）2022 共识建议，在以下三种情形对家人进行高 Lp(a) 的级联筛查：[1]Tier 1Kronenberg, Florian et al. Lipoprotein(a) in atherosclerotic cardiovascular disease and aortic stenosis: a European Atherosclerosis Society consensus statement. European Heart Journal 2022doi:10.1093/eurheartj/ehac361

  • 家族性高胆固醇血症（familial hypercholesterolemia，缩写 FH，FH家族性高胆固醇血症 · Familial hypercholesterolemiaFH/fəˈmɪliəl ˌhaɪpərkəˌlɛstəroʊˈliːmiə/一种遗传性血脂病，由 LDLR、APOB、PCSK9 等基因突变使身体难以清除多余胆固醇，导致自幼血中胆固醇（尤其 LDL 胆固醇）显著升高，并容易在较年轻时发生冠心病。An inherited lipid disorder in which mutations in genes such as LDLR, APOB, or PCSK9 impair the body's clearance of excess cholesterol, causing markedly elevated blood cholesterol (especially LDL cholesterol) from early life and a high risk of early-onset coronary heart disease.🧩 词根拆解 / word rootsfamili-家族的（在家族中遗传） · of the family (inherited)拉丁语 familia 家庭＋hyper-过多、过高 · excessive/high希腊语 hyper 超过＋cholesterol胆固醇 · cholesterol＋-emia血（中…）的状态 · condition of the blood希腊语 haima 血）——一种由基因突变导致自幼胆固醇（尤其低密度脂蛋白 low-density lipoprotein，LDL低密度脂蛋白 · Low-density lipoproteinLDL/ˌloʊ ˈdɛnsɪti ˌlaɪpoʊˈproʊtiːn/运输胆固醇进入外周组织的脂蛋白颗粒；其携带的胆固醇称 LDL-C，是动脉粥样硬化的核心致病因素，俗称“坏胆固醇”。The lipoprotein particle that carries cholesterol to peripheral tissues; its cholesterol cargo (LDL-C) is a central causal driver of atherosclerosis, popularly called 'bad cholesterol'.🧩 词根拆解 / word rootslow-density低密度 · low density＋lipo-脂、脂肪 · fat希腊语 lipos 脂肪＋protein蛋白质 · protein希腊语 prōtos 第一/首要，胆固醇）显著升高、容易在较年轻时就发生冠心病（coronary heart disease，CHD冠心病 · Coronary heart diseaseCHD/ˈkɔːrənəri hɑːrt dɪˈziːz/冠状动脉粥样硬化导致心肌供血不足所引起的心脏病，可表现为心绞痛、心肌梗死等。Heart disease resulting from insufficient blood supply to the myocardium due to atherosclerosis of the coronary arteries; may present as angina or myocardial infarction.🧩 词根拆解 / word rootscoron-冠、王冠（冠状动脉像王冠一样环绕心脏） · crown (the arteries encircle the heart like a crown)拉丁语 corona 王冠＋-ary…的（形容词后缀） · adjective suffix）的遗传病；[3]Tier 3MedlinePlus Genetics, U.S. National Library of Medicine et al. Familial hypercholesterolemia. 2024https://medlineplus.gov/genetics/condition/familial-hypercholesterolemia/
  • 家族中已有人查出（很）高的 Lp(a)；[1]Tier 1Kronenberg, Florian et al. Lipoprotein(a) in atherosclerotic cardiovascular disease and aortic stenosis: a European Atherosclerosis Society consensus statement. European Heart Journal 2022doi:10.1093/eurheartj/ehac361
  • 本人或家族有动脉粥样硬化性心血管疾病（atherosclerotic cardiovascular disease，ASCVD动脉粥样硬化性心血管疾病 · Atherosclerotic cardiovascular diseaseASCVD/ˌæθəroʊskləˈrɒtɪk ˌkɑːrdioʊˈvæskjələr/由动脉粥样硬化引起的一类疾病的总称，包括冠心病、缺血性卒中、外周动脉疾病等。An umbrella term for diseases caused by atherosclerosis, including coronary heart disease, ischaemic stroke, and peripheral artery disease.）病史。[1]Tier 1Kronenberg, Florian et al. Lipoprotein(a) in atherosclerotic cardiovascular disease and aortic stenosis: a European Atherosclerosis Society consensus statement. European Heart Journal 2022doi:10.1093/eurheartj/ehac361

如果你属于其中任何一种情况，和一级亲属（父母、兄弟姐妹、子女）谈一谈、建议他们也测一次 Lp(a)，是合理的。[1]Tier 1Kronenberg, Florian et al. Lipoprotein(a) in atherosclerotic cardiovascular disease and aortic stenosis: a European Atherosclerosis Society consensus statement. European Heart Journal 2022doi:10.1093/eurheartj/ehac361

高 Lp(a) 家系与级联筛查 / High Lp(a) pedigree and cascade screening

图 · 从查出高 Lp(a) 的先证者出发的家系：Lp(a) 为共显性遗传，高 Lp(a) 等位基因可来自父母任一方；级联筛查即检测其一级亲属（父母/兄弟姐妹/子女）。[2]Tier 1Reyes-Soffer, Gissette et al. Lipoprotein(a): a genetically determined, causal, and prevalent risk factor for atherosclerotic cardiovascular disease: a scientific statement from the American Heart Association. Arteriosclerosis, Thrombosis, and Vascular Biology 2022doi:10.1161/ATV.0000000000000147 [1]Tier 1Kronenberg, Florian et al. Lipoprotein(a) in atherosclerotic cardiovascular disease and aortic stenosis: a European Atherosclerosis Society consensus statement. European Heart Journal 2022doi:10.1093/eurheartj/ehac361

查出来能做什么：识别风险 ≠ 已有特效药​

这里必须诚实说明：到目前为止，尚无获批的、被证实能降低心血管事件的特异性降 Lp(a) 药物。[2]Tier 1Reyes-Soffer, Gissette et al. Lipoprotein(a): a genetically determined, causal, and prevalent risk factor for atherosclerotic cardiovascular disease: a scientific statement from the American Heart Association. Arteriosclerosis, Thrombosis, and Vascular Biology 2022doi:10.1161/ATV.0000000000000147 家族筛查的价值，不在于给家人一颗"降 Lp(a) 的药"，而在于尽早识别出高风险的人，从而更早、更主动地管理其他可控的风险因素。

高 Lp(a) 是动脉粥样硬化性心血管疾病与主动脉瓣狭窄（aortic valve stenosis，AS主动脉瓣狭窄 · Aortic (valve) stenosisAS/eɪˈɔːrtɪk stəˈnoʊsɪs/主动脉瓣开口变窄、阻碍左心室向主动脉射血的瓣膜病；高 Lp(a) 是其独立危险因素之一。A valvular disease in which the aortic valve opening narrows, obstructing blood ejection from the left ventricle into the aorta; high Lp(a) is one independent risk factor.🧩 词根拆解 / word rootsaort-主动脉 · aorta希腊语 aortē＋-ic…的（形容词后缀） · adjective suffix＋steno-狭窄 · narrow希腊语 stenos 窄＋-osis（病理性）状态、过程 · abnormal condition/process希腊语 -ōsis）的独立致病因素，且这种风险独立于 LDL 胆固醇之外。[1]Tier 1Kronenberg, Florian et al. Lipoprotein(a) in atherosclerotic cardiovascular disease and aortic stenosis: a European Atherosclerosis Society consensus statement. European Heart Journal 2022doi:10.1093/eurheartj/ehac361 因此，在缺乏特异性降 Lp(a) 药物的当下，EAS 共识建议对高 Lp(a) 者更早、更强化地管理其他风险因素（如 LDL 胆固醇、血压、吸烟等），以降低整体（绝对）心血管风险。[1]Tier 1Kronenberg, Florian et al. Lipoprotein(a) in atherosclerotic cardiovascular disease and aortic stenosis: a European Atherosclerosis Society consensus statement. European Heart Journal 2022doi:10.1093/eurheartj/ehac361

把整门课收个尾​

从"我为什么会查出高 Lp(a)"这一个问题出发，我们一路走过了脂蛋白的结构、动脉粥样硬化的机制、风险的评估与管理。现在这条线索回到了它的起点，也延伸向未来：Lp(a) 是一段与家人共享的基因，识别它、正视它，并把整体心血管风险管理好——这既是为你自己，也是为你所爱的人。

⚕️ 本内容仅供健康科普与学习，不能替代专业医疗建议、诊断或治疗。

参考文献 / References​

  1. Tier 1Kronenberg, Florian et al. Lipoprotein(a) in atherosclerotic cardiovascular disease and aortic stenosis: a European Atherosclerosis Society consensus statement. European Heart Journal (2022) · doi:10.1093/eurheartj/ehac361
  2. Tier 1Reyes-Soffer, Gissette et al. Lipoprotein(a): a genetically determined, causal, and prevalent risk factor for atherosclerotic cardiovascular disease: a scientific statement from the American Heart Association. Arteriosclerosis, Thrombosis, and Vascular Biology (2022) · doi:10.1161/ATV.0000000000000147
  3. Tier 3MedlinePlus Genetics, U.S. National Library of Medicine et al. Familial hypercholesterolemia (2024) · link