Hereditary ATTR Amyloidosis in Austria: Prevalence and Epidemiological Hot Spots

Journal of Clinical Medicine
Michaela Auer-GrumbachDiana Bonderman

Abstract

Hereditary transthyretin amyloidosis (hATTR) is an autosomal dominantly inherited disorder caused by an accumulation of amyloid fibrils in tissues due to mutations in the transthyretin (TTR) gene. The prevalence of hATTR is still unclear and likely underestimated in many countries. In order to apply new therapies in a targeted manner, early diagnosis and knowledge of phenotype-genotype correlations are mandatory. This study aimed to assess the prevalence and phenotypic spectrum of hATTR in Austria. Within the period of 2014-2019, patients with ATTR-associated cardiomyopathy and/or unexplained progressive polyneuropathies were screened for mutations in the TTR gene. We identified 43 cases from 22 families carrying 10 different TTR missense mutations and confirmed two mutational hot spots at c.323A>G (p.His108Arg) and c.337G>C (p.Val113Leu). Two further patients with late onset ATTR carried TTR variants of unknown significance. The majority of patients initially presented with heart failure symptoms that were subsequently accompanied by progressive polyneuropathy in most cases. A total of 55% had a history of carpal tunnel syndrome before the onset of other organ manifestations. Our study underlined the relevance of hATTR in the ...Continue Reading

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Citations

Dec 4, 2020·Wiener klinische Wochenschrift·Diana BondermanJulia Mascherbauer
Sep 1, 2021·Circulation. Genomic and Precision Medicine·Pranav ChandrashekarAhmad Masri

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Methods Mentioned

BETA
biopsy
PCR

Software Mentioned

Applied BioSystems SeqScape
DNADynamo Sequence Analysis

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