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  • Role of nerve growth factor and tropomyosin receptor kinase A in the pathogenesis of osteoarthritis. Might nerve growth factor be the link interwinding obesity and osteoarthritis?

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Role of nerve growth factor and tropomyosin receptor kinase A in the pathogenesis of osteoarthritis. Might nerve growth factor be the link interwinding obesity and osteoarthritis?
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  1. Florenzo Iannone1,
  2. Simone Perniola1,
  3. Giuseppe Lopalco1,
  4. Luca Cantarini2,
  5. Giovanni Lapadula1
  1. 1Rheumatology Unit, University of Bari, Bari, Italy
  2. 2Rheumatology Unit, University of Siena, Siena, Italy
  1. Correspondence to Professor Florenzo Iannone, School of Medicine, University of Bari, P.zza G. Cesare 11, Bari 70124, Italy; florenzo.iannone{at}uniba.it

https://doi.org/10.1136/annrheumdis-2015-208519

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    We read with interest the paper by Nwosu et al1 recently published in Annals of the Rheumatic Diseases. They clearly provided evidence that blocking tropomyosin receptor kinase A (TrkA), the p140 high-affinity receptor of nerve growth factor (NGF), by a selective TrkA inhibitor AR786 relieves pain in two different rat models of osteoarthritis (OA). A reduction of synovitis was also shown by histopathology, suggesting that NGF inhibition exerted its effect at peripheral level on extraneural tissues. Authors concluded that inhibition of NGF activity might be an effective strategy as treatment of OA pain. Indeed, NGF may have pleiotropic effects, and we would like to speculate on the possible role played by NGF and its counter-receptor …

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