Background: CNV in has been identified to influence androgen receptor function via its changes in gene dosage, which might contribute to hypospadias. However, there is lack of population-level evidence to assess the contribution of CNV to hypospadias.
Methods: 349 isolated hypospadias patients were recruited and their genotyping was performed using real-time qPCR. We use Database of Genomic Variants (DGV) and CNV calls from SNP-array intensity data in 1,008 Chinese healthy men as reference.
Results: 11.17% of patients were identified to have CNV deletion, significantly higher than 0.05% in DGV ( < 0.001), but no cases found to have CNV duplication. Meanwhile, no CNV calls encompassing region were detected in Chinese healthy men. Incidence of CNV deletion was significantly increased with the severity of hypospadias, = 9.00 × 10. Compared to distal hypospadias, ORs for the proximal and midshaft were 10.07 (2.91-34.84) and 6.08 (1.69-21.84) respectively. In addition, the association between genital characteristics (stretched penile length and glans width) and CNV showed no significance in hypospadias children (> 0.05).
Conclusions: We demonstrate CNV deletion is strongly associated with hypospadias and its severity, but duplication is not, characterizing genetic variation in more detail than previously described.
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| http://dx.doi.org/10.3389/fped.2024.1409264 | DOI Listing |
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