Peer-reviewed veterinary case report
Testicular disorder causing ambiguous genitalia in male cats with XY
By Nowacka-Woszuk, Joanna et al.·Published in Animal reproduction science·2014·Department of Genetics and Animal Breeding·View original on PubMed →
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Original publication title: Testicular disorder of sex development in four cats with a male karyotype (38,XY; SRY-positive).
- Species:
- cat
Plain-English summary
Four cats with male chromosomes were brought in for examination due to ambiguous external genitalia. Three of the cats had underdeveloped penises and misplaced urethras, while the fourth had a normal penis but a blind vulva and active testes. Tests showed that all four cats had typical male chromosomes, but the exact cause of their unusual genital development is still unclear. Despite various genetic tests, no specific genetic mutations were linked to their conditions.
People also search for: cat ambiguous genitalia · cat testicular disorder · male cat genital problems · cat sex development issues
Abstract
The molecular background of disorders of sex development (DSD) in cats is poorly recognized. In this study we present cytogenetic, molecular and histological analyses of four cats subjected for the analysis due to ambiguous external genitalia. Three cases, with rudimentary penises and an abnormal position of the urethral orifice, represented different types of hypospadias. The fourth case had a normal penis, a blind vulva and spermatogenetically active testes. Histological studies showed structures typical of testes, but spermatogenic activity was observed in two cats only. All the cats had a normal male chromosome complement (38,XY) and the Y-chromosome linked genes (SRY and ZFY) were also detected. Fluorescent in situ hybridization (FISH), with the use of the feline BAC probe harboring the SRY gene, excluded the possibility of chromosome translocation of the Y chromosome fragment carrying the SRY gene onto another chromosome. Sequencing of four candidate genes (SRY--sex determining region Y; AR--androgen receptor; SRD5A2--steroid-5-alfa reductase 2 and MAMLD1--mastermind-like domain containing (1) revealed one SNP in the SRY gene, one common polymorphism in exon 1 of the AR gene (tandem repeat of a tri-nucleotide motif--CAG), six polymorphisms (5 SNPs and 1 indel) in the SRD5A2 gene and one SNP in the MAMLD1 gene. Molecular studies of the candidate genes showed no association with the identified polymorphisms, thus molecular background of the studied DSD phenotypes remains unknown.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/25455261/