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Genome-wide linkage scan for bladder exstrophy-epispadias complex

✍ Scribed by Michael Ludwig; Franz Rüschendorf; Kathrin Saar; Norbert Hübner; Lothar Siekmann; Simeon A. Boyadjiev; Heiko Reutter

Publisher
John Wiley and Sons
Year
2009
Tongue
English
Weight
202 KB
Volume
85
Category
Article
ISSN
1542-0752

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✦ Synopsis

Abstract

BACKGROUND:

The bladder exstrophy‐epispadias complex represents a spectrum of urogenital anomalies in which part or all of the distal urinary tract fail to close and are exposed on the outer abdominal wall. Previous studies are suggestive of an underlying multifactorial mode of inheritance. However, no genetic or nongenetic factor has been identified so far. In this study, we sought risk loci by parametric and nonparametric linkage analysis, searching for homozygous segments, and more complex inherited loci, respectively.

METHODS:

Two pedigrees, Spanish and German, each comprising two members affected with classical bladder exstrophy, were analyzed by genome‐wide linkage scan.

RESULTS:

Evidence for possible risk/modifying loci on chromosomes 2p22.1–p21, 2p25.2–p25.1, 4q23–q32.3, 7q21.3–q33, 7q34–q36.1, 14q31.1–q32.2, and 19q13.33–q13.43 (LOD scores >1.50) was obtained.

CONCLUSIONS:

This study was the first positional approach to identify chromosomal candidate regions causally related to bladder exstrophy‐epispadias complex. Our results suggest the presence of susceptibility genes in the regions identified. These regions need to be confirmed in future studies. Birth Defects Research (Part A) 2009. © 2008 Wiley‐Liss, Inc.

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