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Calcium-Containing Crystals and Osteoarthritis: an Unhealthy Alliance

  • Crystal Arthritis (L Stamp, Section Editor)
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Abstract

Purpose of Review

Osteoarthritis (OA) is the most common form of joint disease globally and is associated with significant morbidity and disability. Increasing evidence points to an important inflammatory component in the development and progression of OA. The precise pathways involved in OA inflammatory processes remain to be clarified. Basic calcium phosphate (BCP) and calcium pyrophosphate dihydrate (CPP) crystals can induce inflammation and arthritis and recent studies point to a potential pathogenic role in OA. In the light of this evidence, we explore the relationship and potential mechanistic pathways linking calcium-containing crystals and OA.

Recent Findings

CPP crystals induce inflammation through the NLRP3 inflammasome while BCP crystals mediate both NLRP3 dependent and independent effects. BCP crystals have been demonstrated to induce key mitogenic and inflammatory pathways and contribute to cartilage degradation.

Summary

Calcium-containing crystals induce key inflammatory pathways and may represent an attractive novel target in OA, a condition devoid of effective treatments.

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Authors and Affiliations

  1. Department of Rheumatology, St. James’s Hospital, James Street, Dublin 8, Ireland

    Richard Conway

  2. Department of Rheumatology, Mater Misericordiae University Hospital, Dublin Academic Medical Centre, Eccles St., Dublin 7, Ireland

    Geraldine M. McCarthy

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Correspondence to Richard Conway.

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Conway, R., McCarthy, G.M. Calcium-Containing Crystals and Osteoarthritis: an Unhealthy Alliance. Curr Rheumatol Rep 20, 13 (2018). https://doi.org/10.1007/s11926-018-0721-9

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