Transduction mechanisms of porcine chondrocyte inorganic pyrophosphate elaboration

Lawrence M. Ryan, Indira V. Kurup, Herman S. Cheung

Research output: Contribution to journalArticlepeer-review

24 Scopus citations


Objective. To investigate cellular signaling mechanisms that influence chondrocyte production of inorganic pyrophosphate (PPi), which promotes calcium pyrophosphate dihydrate (CPPD) crystal deposition. Methods. Articular chondrocyte and cartilage cultures were stimulated with protein kinase C (PKC) activator and adenyl cyclase activator. Generation of extracellular PPi was measured. Results. Adenyl cyclase activation resulted in diminished pyrophosphate generation. PKC activation stimulated pyrophosphate elaboration. Conclusion. Two signaling pathways, cAMP and PKC, modulate generation of extracellular pyrophosphate by cartilage and chondrocytes. They are novel targets for potentially diminishing extracellular pyrophosphate elaboration that leads to CPPD crystal deposition.

Original languageEnglish (US)
Pages (from-to)555-560
Number of pages6
JournalArthritis and Rheumatism
Issue number3
StatePublished - 1999

ASJC Scopus subject areas

  • Immunology and Allergy
  • Rheumatology
  • Immunology
  • Pharmacology (medical)


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