A novel heterozygous mutation in the Indian hedgehog gene (IHH) is associated with brachydactyly type A1 in a Chinese family
Copyright policy )A novel heterozygous mutation in the Indian hedgehog gene (IHH) is associated with brachydactyly type A1 in a Chinese family
Brachydactyly type A1 (BDA1) is caused by mutations in the Indian hedgehog gene, IHH, on chromosome 2q35-36. In this study, a large five-generation Chinese family with BDA1 was identified and characterized. All affected family members demonstrated significant homogeneous phenotype and some unique clinical features different from those associated with the reported BDA1 mutations in IHH. Linkage analysis showed that the BDA1 gene in the family was linked to marker D2S126 close to IHH with a LOD score of 4.74 at a recombination fraction of 0. DNA sequence analysis revealed a heterozygous C to T transition at nucleotide 461 of IHH, resulting in a novel T154I substitution. The T154I mutation co-segregated with all affected individuals in the family, and was not present in normal family members or 200 normal controls. These results expand the spectrum of clinical phenotype associated with IHH mutations.
- Cleveland Clinic United States
- Huazhong University of Science and Technology China (People's Republic of)
- Union Hospital China (People's Republic of)
Male, China, Heterozygote, Molecular Sequence Data, Chromosome Mapping, Pedigree, Radiography, Asian People, Mutation, Humans, Intercellular Signaling Peptides and Proteins, Female, Genetic Predisposition to Disease, Hedgehog Proteins, Amino Acid Sequence, Hand Deformities, Congenital
Male, China, Heterozygote, Molecular Sequence Data, Chromosome Mapping, Pedigree, Radiography, Asian People, Mutation, Humans, Intercellular Signaling Peptides and Proteins, Female, Genetic Predisposition to Disease, Hedgehog Proteins, Amino Acid Sequence, Hand Deformities, Congenital
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