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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Genetic changes in the RNA components of RNase MRP and RNase P in Schmid metaphyseal chondrodysplasia.

BACKGROUND: The Schmid type of metaphyseal chondrodysplasia (MCDS) is generally due to mutations in COL10A1 encoding for type X collagen of cartilage. METHODS: We performed a study on the genes coding for the RNA components of RNase MRP (MRPR) and RNase P (H1RNA) among 20 patients with diagnosis of MCDS and no mutations in COL10A1. RESULTS: Two patients were found to be homozygous for a base substitution G for A at nucleotide 70 of RMRP, which is the major mutation causing cartilage-hair hypoplasia. No pathogenic mutations were detected in H1RNA. CONCLUSION: Cartilage-hair hypoplasia diagnosis should be considered in patients with metaphyseal chondrodysplasia even in the absence of any extra-skeletal manifestations if no mutation in COL10A1 can be found and the family history is compatible with autosomal recessive inheritance. Correct diagnosis is important for genetic counselling and for proper follow up of the patients.[1]


  1. Genetic changes in the RNA components of RNase MRP and RNase P in Schmid metaphyseal chondrodysplasia. Ridanpää, M., Ward, L.M., Rockas, S., Särkioja, M., Mäkelä, H., Susic, M., Glorieux, F.H., Cole, W.G., Mäkitie, O. J. Med. Genet. (2003) [Pubmed]
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