TP63 gene mutation analysis in a case of ankyloblepharon-ectodermal defects-cleft lip/palate syndrome / 中华皮肤科杂志

ABSTRACT

Objective:To analyze pathogenic mutations in a child with ankyloblepharon-ectodermal defects-cleft lip/palate syndrome.Methods:Clinical data were collected from a patient with ankyloblepharon-ectodermal defects-cleft lip/palate syndrome, and DNA was extracted from peripheral blood samples from the patient and his parents. High-throughput sequencing was performed in the patient by using a gene panel targeting hereditary skin diseases, aiming to determine sites of disease-causing gene mutations. Then, Sanger sequencing was conducted to bidirectionally verify the mutations in the patient and his parents.Results:The male patient aged 3 years and 9 months, and presented with extensive erythema, scales, erosions as well as repeated infections and erosions of the scalp after birth. Reticulated hyper- and hypopigmented patches and scars left on the trunk and limbs after healing of erosions. Physical examination also showed sparse scalp hair, absence of most eyebrows and eyelashes, cleft palate, dysplastic teeth, dystrophic finger and toe nails, and deformed ears without ankyloblepharon. Genetic testing of the patient showed a novel heterozygous missense mutation c.1790T>A (p.Ile597Asn) in the TP63 gene, which had not been reported previously and was rated as pathogenic according to the American College of Medical Genetics and Genomics guidelines. This mutation was not identified in either of his parents.Conclusion:The novel heterozygous missense mutation c.1790T>A in the TP63 gene probably contributes to ankyloblepharon-ectodermal defects-cleft lip/palate syndrome in the patient, which expands genotypic and phenotypic spectrum of this disease.