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Novel heterozygous sequence variant in the GLI1 underlies postaxial polydactyly
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AbstractPolydactyly is one of the most common congenital abnormal phenotype of autopod, which is characterized by extra supernumerary digit in hands/feet with or without well‐developed bony structure within the digits. Preaxial polydactyly (PPD), postaxial polydactyly (PAP), and meso‐axial (central) polydactyly are three different isoforms of polydactyly. Genetically, at least 10 genes have been identified causing nonsyndromic polydactyly. In the present study, we have investigated a large family segregating autosomal dominant form of nonsyndromic polydactyly. Whole exome sequencing followed by Sanger sequencing revealed a novel heterozygous missense variant (NM_005269.3; c.1064C>A; p.(Thr355Asn) in the gene GLI1 segregating with the disease phenotype within the family. This study presents first familial case of autosomal dominant form of polydactyly caused by the GLI1 variant.
Title: Novel heterozygous sequence variant in the GLI1 underlies postaxial polydactyly
Description:
AbstractPolydactyly is one of the most common congenital abnormal phenotype of autopod, which is characterized by extra supernumerary digit in hands/feet with or without well‐developed bony structure within the digits.
Preaxial polydactyly (PPD), postaxial polydactyly (PAP), and meso‐axial (central) polydactyly are three different isoforms of polydactyly.
Genetically, at least 10 genes have been identified causing nonsyndromic polydactyly.
In the present study, we have investigated a large family segregating autosomal dominant form of nonsyndromic polydactyly.
Whole exome sequencing followed by Sanger sequencing revealed a novel heterozygous missense variant (NM_005269.
3; c.
1064C>A; p.
(Thr355Asn) in the gene GLI1 segregating with the disease phenotype within the family.
This study presents first familial case of autosomal dominant form of polydactyly caused by the GLI1 variant.
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