TY - JOUR T1 - ATP-induced chondrocalcinosis. AU - Ryan,L M, AU - Kurup,I V, AU - Derfus,B A, AU - Kushnaryov,V M, PY - 1992/12/1/pubmed PY - 1992/12/1/medline PY - 1992/12/1/entrez SP - 1520 EP - 5 JF - Arthritis and rheumatism JO - Arthritis Rheum VL - 35 IS - 12 N2 - OBJECTIVE: To determine whether adult articular cartilage mineralizes in the presence of ATP. METHODS: Intact adult porcine articular cartilage and monolayers of chondrocytes were cultured in physiologic media containing ATP, and mineralization was measured as retention of 45Ca. Cartilage was analyzed by electron microscopy. RESULTS: Articular cartilage sequestered 45Ca when incubated with 100 microM ATP: Use of the ATP analog alpha, beta-methylene ATP did not promote mineralization and addition of pyrophosphatase inhibited mineralization, indicating that hydrolysis of ATP to AMP and inorganic pyrophosphate is necessary for the process to occur. Mineral was concentrated in articular cartilage vesicles in the perichondral area. CONCLUSION: Adult articular cartilage mineralizes in the presence of ATP, in a manner similar to that found with isolated matrix or articular cartilage vesicles. This supports the notion that these structures have a role in chondrocalcinosis. SN - 0004-3591 UR - https://www.unboundmedicine.com/prime/citation/1472129/ATP-induced_chondrocalcinosis. DB - PRIME DP - Unbound Medicine ER -