Global prevalence of platelet-type von Willebrand disease

IF 3.4 3区 医学 Q2 HEMATOLOGY
Omid Seidizadeh , Andrea Cairo , Maha Othman , Flora Peyvandi
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Abstract

Background

Platelet-type von Willebrand disease (PT-VWD) is a rare autosomal dominant disorder. It is caused by gain-of-function gene variants in the platelet GP1BA, which results in excessive binding between GPIbα and von Willebrand factor (VWF). The prevalence of PT-VWD is unknown.

Objectives

To establish the worldwide and within distinct ethnic groups prevalence of PT-VWD.

Methods

We used available exome and genome sequencing data of 807,162 (730,947 exomes and 76,215 genomes) subjects from the Genome Aggregation Database (gnomAD-v4.1).

Results

Among the 1,614,324 alleles analyzed in the gnomAD population, there were 1397 distinct GP1BA variants. Of them, 4 variants (p.Arg127Gln, p.Leu194Phe, p.Gly249Val, and p.Met255Ile) have been previously reported to cause PT-VWD. Considering these 4 known pathogenic variants, we estimated a global PT-VWD prevalence of 136 cases/106. The highest estimated prevalence of PT-VWD was found in Africans/African Americans (160/106), Finnish (156/106), Europeans (149/106), and South Asians (110/106), followed by Ashkenazi Jewish (68/106) and East Asian (45/106) ethnicities. In the population with no assigned ethnicity, a prevalence of 126/106 was estimated. Since no pathogenic GP1BA variants that were previously reported to cause PT-VWD were found in Admixed American and Middle Eastern ethnicities, we were unable to estimate the PT-VWD prevalence in these 2 populations. We found a global prevalence of 2.5/106 for severe PT-VWD and 134/106 for the mild form.

Conclusion

This population-based genetic epidemiology analysis indicates a substantially higher than expected frequency of PT-VWD. This novel finding suggests that a large number of PT-VWD patients are still under- or misdiagnosed.
血小板型血管性血友病的全球患病率
背景血小板型血管性血友病(PT-VWD)是一种罕见的常染色体显性遗传病。它是由血小板GP1BA中功能获得性基因变异引起的,导致GPIbα与血管性血友病因子(VWF)过度结合。PT-VWD的患病率尚不清楚。目的了解PT-VWD在世界范围内及不同民族的流行情况。方法利用基因组聚合数据库(gnomAD-v4.1)中已有的807162例(730947个外显子组和76215个基因组)的外显子组和基因组测序数据。结果在gnomAD人群中分析的1,614,324个等位基因中,有1397个不同的GP1BA变体。其中,有4个变异(p.a g127gln、p.l u194phe、p.g 249val和p.Met255Ile)曾被报道引起PT-VWD。考虑到这4种已知的致病变异,我们估计全球PT-VWD患病率为136例/106例。估计PT-VWD患病率最高的是非洲人/非裔美国人(160/106)、芬兰人(156/106)、欧洲人(149/106)和南亚人(110/106),其次是德系犹太人(68/106)和东亚人(45/106)。在没有指定种族的人群中,估计患病率为126/106。由于之前报道的导致PT-VWD的致病性GP1BA变异未在美国和中东混血种族中发现,因此我们无法估计这两个人群中PT-VWD的患病率。我们发现严重PT-VWD的全球患病率为2.5/106,轻度PT-VWD的全球患病率为134/106。结论基于人群的遗传流行病学分析表明,PT-VWD的发生频率明显高于预期。这一新发现表明,大量PT-VWD患者仍被低估或误诊。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
5.60
自引率
13.00%
发文量
212
审稿时长
7 weeks
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