Abstract | OBJECTIVE: Given the recent characterization of ADAMTS-5 as the main aggrecanase of cartilage destruction in mouse models, we explored whether genetic variation and, in particular, putative damaging polymorphisms in the ADAMTS-5 gene modify susceptibility to osteoarthritis (OA). METHODS: Two likely deleterious nonsynonymous single-nucleotide polymorphisms (SNPs) were identified in ADAMTS-5 by bioinformatics analysis, rs2830585 in exon 5 affecting a thrombospondin 1 motif, and rs226794 in exon 7. Exploration of their role was carried out in 3 steps, discovery, extension, and replication, on samples obtained from 4 European Caucasian collections, comprising a total of 2,715 patients with knee, hip, or hand OA and 1,185 OA-free controls. In addition, 6 tagSNPs were studied to fully evaluate genetic variation in the ADAMTS-5 locus. RESULTS: Initial analyses of 2 sample collections (n = 277 and n = 159) showed a trend toward decreased frequency of the putative deleterious allele of rs226794 among patients with severe knee OA (P = 0.047 versus controls). However, results in patients with knee OA from 2 additional sample collections (n = 360 and n = 265) did not confirm this trend. No association was found with hip OA or hand OA. None of the other SNPs or haplotypes constructed with these SNPs showed a significant association with OA susceptibility. CONCLUSION: Use of several collections of OA samples allowed us to obtain sound evidence against the participation of genetic variation in ADAMTS-5 in OA susceptibility. These results indicate the need to further explore the function of this aggrecanase in human OA to determine whether it is as critical as has been observed in mouse models.
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Authors | Julio Rodriguez-Lopez, Zehra Mustafa, Manuel Pombo-Suarez, Konstantinos N Malizos, Ignacio Rego, Francisco J Blanco, Aspasia Tsezou, John Loughlin, Juan J Gomez-Reino, Antonio Gonzalez |
Journal | Arthritis and rheumatism
(Arthritis Rheum)
Vol. 58
Issue 2
Pg. 435-41
(Feb 2008)
ISSN: 0004-3591 [Print] United States |
PMID | 18240210
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Chemical References |
- ADAM Proteins
- ADAMTS5 Protein
- ADAMTS5 protein, human
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Topics |
- ADAM Proteins
(genetics)
- ADAMTS5 Protein
- Aged
- Female
- Genetic Predisposition to Disease
- Genetic Variation
- Haplotypes
- Humans
- Linkage Disequilibrium
- Male
- Middle Aged
- Osteoarthritis
(genetics)
- Polymorphism, Single Nucleotide
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