A founder COL4A4 pathogenic variant resulting in autosomal recessive Alport syndrome accounts for most genetic kidney failure in Romani people

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00669806%3A_____%2F23%3A10457277" target="_blank" >RIV/00669806:_____/23:10457277 - isvavai.cz</a>

Alternative codes found

RIV/61988987:17110/23:A2402JS3 RIV/00216208:11130/23:10457277 RIV/00216208:11120/23:43925172 RIV/00216208:11140/23:10457277 and 7 more

Result on the web

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=2dsC.qj3TQ" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=2dsC.qj3TQ</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3389/fmed.2023.1096869" target="_blank" >10.3389/fmed.2023.1096869</a>

Result language

angličtina

Original language name

A founder COL4A4 pathogenic variant resulting in autosomal recessive Alport syndrome accounts for most genetic kidney failure in Romani people

Original language description

INTRODUCTION: Romani people have a high prevalence of kidney failure. This study examined a Romani cohort for pathogenic variants in the COL4A3, COL4A4, and COL4A5 genes that are affected in Alport syndrome (AS), a common cause of genetic kidney disease, characterized by hematuria, proteinuria, end-stage kidney failure, hearing loss, and eye anomalies. MATERIALS AND METHODS: The study included 57 Romani from different families with clinical features that suggested AS who underwent next-generation sequencing (NGS) of the COL4A3, COL4A4, and COL4A5 genes, and 83 family members. RESULTS: In total, 27 Romani (19%) had autosomal recessive AS caused by a homozygous pathogenic c.1598G&gt;A, p.Gly533Asp variant in COL4A4 (n = 20) or a homozygous c.415G&gt;C, p.Gly139Arg variant in COL4A3 (n = 7). For p.Gly533Asp, 12 (80%) had macroscopic hematuria, 12 (63%) developed end-stage kidney failure at a median age of 22 years, and 13 (67%) had hearing loss. For p.Gly139Arg, none had macroscopic hematuria (p = 0.023), three (50%) had end-stage kidney failure by a median age of 42 years (p = 0.653), and five (83%) had hearing loss (p = 0.367). The p.Gly533Asp variant was associated with a more severe phenotype than p.Gly139Arg, with an earlier age at end-stage kidney failure and more macroscopic hematuria. Microscopic hematuria was very common in heterozygotes with both p.Gly533Asp (91%) and p.Gly139Arg (92%). CONCLUSION: These two founder variants contribute to the high prevalence of kidney failure in Czech Romani. The estimated population frequency of autosomal recessive AS from these variants and consanguinity by descent is at least 1:11,000 in Czech Romani. This corresponds to a population frequency of autosomal dominant AS from these two variants alone of 1%. Romani with persistent hematuria should be offered genetic testing.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

30209 - Paediatrics

Project

<a href="/en/project/NV19-06-00443" target="_blank" >NV19-06-00443: Genetics of adult-onset familial focal segmental glomerulosclerosis (FSGS) – implications for individualized therapy and successful kidney transplantation</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2023

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Frontiers in Medicine

ISSN

2296-858X

e-ISSN

2296-858X

Volume of the periodical

10

Issue of the periodical within the volume

February

Country of publishing house

CH - SWITZERLAND

Number of pages

10

Pages from-to

1096869

UT code for WoS article

000935290700001

EID of the result in the Scopus database

2-s2.0-85148573374