This research project proposes to use positional cloning to identify the gene(s) that is (are) responsible for the development of certain sub-sets of hereditary osteoarthritis characterized by the deposition of calcium pyrophosphate in disease-prone joints (CPPDD). Despite ambiguous clinical presentation, it has been estimated a prevalence of 1 in 1000 in patients with crystal-induced inflammation, and a prevalence as high as 30-60% in elderly patients with crystal deposition secondary to sever osteoarthritis. Hence, the investigation of the etiology of familial CPPDD allows a unique opportunity to define molecularly pathologic mechanisms that initiate and/or coincide with crystal-associated arthropathy. Toward this end, the following aims are proposed: (1) fine linkage mapping of the CPPDD locus at chromosomal interval 5p15 previously identified in a large Argentinean kindred will be undertaken to narrow the disease gene interval to within 1 cM; (2) use of appropriate polymorphic markers and YAC clones to physically define the region of the CPPDD disease gene interval; cosmids selected by hybridization to the YACs of interest will be used to recover expressed sequences within the interval; (3) identification of expressed sequences recovered by exon trapping or cDNA selection which, after being assessed for tissue-specific expression, will be used to isolate overlapping cDNA clones from tissue-specific cDNA libraries; and (4) search for dominant mutations potentially responsible for the disease phenotype using the positive cDNA clones.

Agency
National Institute of Health (NIH)
Institute
National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS)
Type
Research Project (R01)
Project #
5R01AR044360-04
Application #
6055630
Study Section
Pathobiochemistry Study Section (PBC)
Program Officer
Tyree, Bernadette
Project Start
1996-09-30
Project End
2000-08-31
Budget Start
1999-09-01
Budget End
2000-08-31
Support Year
4
Fiscal Year
1999
Total Cost
Indirect Cost
Name
Thomas Jefferson University
Department
Internal Medicine/Medicine
Type
Schools of Medicine
DUNS #
061197161
City
Philadelphia
State
PA
Country
United States
Zip Code
19107
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