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Recall by genotype and cascade screening for familial hypercholesterolemia in a population-based biobank from Estonia.
Genetics in Medicine ( IF 6.6 ) Pub Date : 2018-10-01 , DOI: 10.1038/s41436-018-0311-2
Maris Alver 1, 2 , Marili Palover 1, 2 , Aet Saar 3, 4 , Kristi Läll 1, 5 , Seyedeh Maryam Zekavat 6, 7 , Neeme Tõnisson 1, 8 , Liis Leitsalu 1 , Anu Reigo 1 , Tiit Nikopensius 1 , Tiia Ainla 3, 4 , Mart Kals 1, 5 , Reedik Mägi 1 , Stacey B Gabriel 6 , Jaan Eha 3, 9 , Eric S Lander 6 , Alar Irs 9 , Anthony Philippakis 6 , Toomas Marandi 3, 4 , Pradeep Natarajan 6, 10, 11 , Andres Metspalu 1, 2 , Sekar Kathiresan 6, 10, 11 , Tõnu Esko 1, 6
Affiliation  

PURPOSE Large-scale, population-based biobanks integrating health records and genomic profiles may provide a platform to identify individuals with disease-predisposing genetic variants. Here, we recall probands carrying familial hypercholesterolemia (FH)-associated variants, perform cascade screening of family members, and describe health outcomes affected by such a strategy. METHODS The Estonian Biobank of Estonian Genome Center, University of Tartu, comprises 52,274 individuals. Among 4776 participants with exome or genome sequences, we identified 27 individuals who carried FH-associated variants in the LDLR, APOB, or PCSK9 genes. Cascade screening of 64 family members identified an additional 20 carriers of FH-associated variants. RESULTS Via genetic counseling and clinical management of carriers, we were able to reclassify 51% of the study participants from having previously established nonspecific hypercholesterolemia to having FH and identify 32% who were completely unaware of harboring a high-risk disease-associated genetic variant. Imaging-based risk stratification targeted 86% of the variant carriers for statin treatment recommendations. CONCLUSION Genotype-guided recall of probands and subsequent cascade screening for familial hypercholesterolemia is feasible within a population-based biobank and may facilitate more appropriate clinical management.

中文翻译:

在爱沙尼亚基于人群的生物库中通过基因型和级联筛查回忆起家族性高胆固醇血症。

目的 整合健康记录和基因组图谱的大规模、基于人群的生物库可以提供一个平台来识别具有疾病易感基因变异的个体。在这里,我们回顾了携带家族性高胆固醇血症 (FH) 相关变异的先证者,对家庭成员进行级联筛查,并描述了受这种策略影响的健康结果。方法 塔尔图大学爱沙尼亚基因组中心的爱沙尼亚生物库包括 52,274 人。在具有外显子组或基因组序列的 4776 名参与者中,我们确定了 27 名携带 LDLR、APOB 或 PCSK9 基因的 FH 相关变异的个体。对 64 名家庭成员的级联筛选确定了另外 20 名 FH 相关变异携带者。结果 通过遗传咨询和携带者临床管理,我们能够将 51% 的研究参与者从先前确定的非特异性高胆固醇血症重新分类为 FH,并确定 32% 的参与者完全不知道携带高风险疾病相关的遗传变异。基于影像学的风险分层针对 86% 的变异携带者提供他汀类药物治疗建议。结论 基因型引导的先证者召回和随后的家族性高胆固醇血症级联筛查在基于人群的生物库中是可行的,并且可能有助于更适当的临床管理。基于影像学的风险分层针对 86% 的变异携带者提供他汀类药物治疗建议。结论 基因型引导的先证者召回和随后的家族性高胆固醇血症级联筛查在基于人群的生物库中是可行的,并且可能有助于更适当的临床管理。基于影像学的风险分层针对 86% 的变异携带者提供他汀类药物治疗建议。结论 基因型引导的先证者召回和随后的家族性高胆固醇血症级联筛查在基于人群的生物库中是可行的,并且可能有助于更适当的临床管理。
更新日期:2018-10-01
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