Phenotypic diversity and genetic complexity of PAX3-related Waardenburg syndrome

Puneeth H. Somashekar, Priyanka Upadhyai, Dhanya L. Narayanan, Nutan Kamath, Shruti Bajaj, Katta M. Girisha, Anju Shukla

Research output: Contribution to journalArticle

Abstract

Waardenburg syndrome subtypes 1 and 3 are caused by pathogenic variants in PAX3. We investigated 12 individuals from four unrelated families clinically diagnosed with Waardenburg syndrome type 1/3. Novel pathogenic variants identified in PAX3 included single nucleotide variants (c.166C>T, c.829C>T), a 2-base pair deletion (c.366_367delAA) and a multi-exonic deletion. Two novel variants, c.166C>T and c.829C>T and a previously reported variant, c.256A>T in PAX3 were evaluated for their nuclear localization and ability to activate MITF promoter. The coexistence of two subtypes of Waardenburg syndrome with pathogenic variants in PAX3 and EDNRB was seen in one of the affected individuals. Multiple genetic diagnoses of Waardenburg syndrome type 3 and autosomal recessive deafness 1A was identified in an individual. We also review the phenotypic and genomic spectrum of individuals with PAX3-related Waardenburg syndrome reported in the literature.

Original languageEnglish
JournalAmerican Journal of Medical Genetics, Part A
DOIs
Publication statusAccepted/In press - 2020

All Science Journal Classification (ASJC) codes

  • Genetics
  • Genetics(clinical)

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