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Homozygous mutations in **IHH*** cause acrocapitofemoral dysplasia, an autosomal recessive disorder with cone-shaped epiphyses in hands and hips
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| Abstract |
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| Acrocapitofemoral dysplasia is a recently delineated autosomal recessive skeletal dysplasia, characterized clinically by short stature with short limbs and radiographically by cone-shaped epiphyses, mainly in hands and hips. Genomewide homozygosity mapping in two consanguineous families linked the locus to 2q35-q36 with a maximum two-point LOD score of 8.02 at marker D2S2248. Two recombination events defined the minimal critical region between markers D2S2248 and D2S2151 (3.74 cM). Using a candidate-gene approach, we identified two missense mutations in the amino-terminal signaling domain of the gene encoding Indian hedgehog (IHH). Both affected individuals of family 1 are homozygous for a 137C→T transition (P46L), and the three patients in family 2 are homozygous for a 569T→C transition (V190A). The two mutant amino acids are strongly conserved and predicted to be located outside the region where brachydactyly type A-1 mutations are clustered. |
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English
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The American journal of human genetics / American Society of Human Genetics [Bethesda, Md] - New York, N.Y., 1949, currens | |
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New York, N.Y. : 2003
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0002-9297 [print]
1537-6605 [online]
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72:4(2003), p. 1040-1046
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000181972600026
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