Mechanisms of chronic pain in osteoarthritis

Curr Rheumatol Rep. 2012 Dec;14(6):549-56. doi: 10.1007/s11926-012-0279-x.

Abstract

Pain is a major clinical problem of osteoarthritis (OA). Recently, OA has been thought to be a disease of the whole joint with both destruction of cartilage and inflammatory components such as synovitis and bone marrow lesions. Clinical studies have documented a significant inflammatory soft tissue contribution to the severity and frequency of OA pain. Both clinical and experimental studies have provided evidence for the sensitization of pain pathways during OA, involving pronounced changes in joint nociceptors and changes of the nociceptive processing in the spinal cord, brainstem, and thalamocortical system. Additionally, evidence has been provided for neuropathic pain components in OA models. Concerning molecular mechanisms of OA pain and potential options for pain therapy, studies on nerve growth factor, cytokines, sodium channel blockers, hyaluronic acid preparations, and others are addressed in this review.

Publication types

  • Review

MeSH terms

  • Chronic Pain / etiology
  • Chronic Pain / immunology
  • Chronic Pain / physiopathology*
  • Humans
  • Osteoarthritis / complications
  • Osteoarthritis / immunology
  • Osteoarthritis / physiopathology*