Frontiers in Pediatrics (Sep 2022)

Genome-wide association study in patients with posterior urethral valves

  • Loes F. M. van der Zanden,
  • Carlo Maj,
  • Oleg Borisov,
  • Iris A. L. M. van Rooij,
  • Josine S. L. T. Quaedackers,
  • Martijn Steffens,
  • Luca Schierbaum,
  • Sophia Schneider,
  • Lea Waffenschmidt,
  • Lambertus A. L. M. Kiemeney,
  • Liesbeth L. L. de Wall,
  • Stefanie Heilmann,
  • Aybike Hofmann,
  • Jan Gehlen,
  • Johannes Schumacher,
  • Maria Szczepanska,
  • Katarzyna Taranta-Janusz,
  • Pawel Kroll,
  • Grazyna Krzemien,
  • Agnieszka Szmigielska,
  • Michiel F. Schreuder,
  • Stefanie Weber,
  • Marcin Zaniew,
  • Nel Roeleveld,
  • Heiko Reutter,
  • Wout F. J. Feitz,
  • Alina C. Hilger,
  • Alina C. Hilger,
  • Alina C. Hilger

DOI
https://doi.org/10.3389/fped.2022.988374
Journal volume & issue
Vol. 10

Abstract

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Congenital lower urinary tract obstructions (LUTO) are most often caused by posterior urethral valves (PUV), a male limited anatomical obstruction of the urethra affecting 1 in 4,000 male live births. Little is known about the genetic background of PUV. Here, we report the largest genome-wide association study (GWAS) for PUV in 4 cohorts of patients and controls. The final meta-analysis included 756 patients and 4,823 ethnicity matched controls and comprised 5,754,208 variants that were genotyped or imputed and passed quality control in all 4 cohorts. No genome-wide significant locus was identified, but 33 variants showed suggestive significance (P < 1 × 10−5). When considering only loci with multiple variants residing within < 10 kB of each other showing suggestive significance and with the same effect direction in all 4 cohorts, 3 loci comprising a total of 9 variants remained. These loci resided on chromosomes 13, 16, and 20. The present GWAS and meta-analysis is the largest genetic study on PUV performed to date. The fact that no genome-wide significant locus was identified, can be explained by lack of power or may indicate that common variants do not play a major role in the etiology of PUV. Nevertheless, future studies are warranted to replicate and validate the 3 loci that yielded suggestive associations.

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