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PLAGL1 epimutation and bladder exstrophy: Coincidence or concurrent etiology?
Julia Kolarova1,2, Susanne Bens1,2, Ole Ammerpohl1
1Institute of Human Genetics, Christian-Albrechts-University Kiel, Kiel, Germany.
Summary
This study investigated imprinting disorders in bladder exstrophy-epispadias complex (BEEC). A PLAGL1 epimutation was found in one patient, suggesting a link between BEEC and imprinting defects.
Area of Science:
- Genetics
- Developmental Biology
- Epigenetics
Background:
- The bladder exstrophy-epispadias complex (BEEC) encompasses a range of genitourinary malformations.
- Omphaloceles, present in severe BEEC forms, are linked to imprinting disorders.
- This study hypothesized that undiagnosed imprinting disorders contribute to BEEC in some patients.
Observation:
- DNA methylation patterns of 54 imprinted loci were analyzed in 23 BEEC patients.
- Analysis used the Infinium HumanMethylation450 BeadChip, examining over 471,000 autosomal CpG loci.
- Methylation-specific-multiplex ligation-dependent probe amplification (MS-MLPA) corroborated findings.
Findings:
- No significant DNA methylation differences were found across BEEC subtypes.
- One patient with classical bladder exstrophy exhibited hypomethylation at the PLAGL1 locus on chromosome 6q24.
- This hypomethylation was confirmed as a likely mosaic epimutation.
Implications:
- The detection of a PLAGL1 epimutation supports an association between BEEC and imprinting disorders.
- Further research into imprinting defects is warranted for understanding BEEC pathogenesis.
- This finding may inform future diagnostic and therapeutic strategies for BEEC.
