{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,28]],"date-time":"2026-08-28T16:34:20Z","timestamp":1787934860288,"version":"build-2784847793"},"reference-count":35,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2020,6,12]],"date-time":"2020-06-12T00:00:00Z","timestamp":1591920000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Haemophilia"],"published-print":{"date-parts":[[2020,7]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Introduction and Aim<\/jats:title><jats:p>Haemarthroses cause major morbidity in haemophilia resulting in chronic haemophilic synovitis (CHS) and arthropathy. Oxidation of haemoglobin\u2010coupled iron released in synovium after haemolysis induces chondrocytes death and cartilage damage, allowing postulate using iron\u2010chelating drugs as potential therapeutic tool for haemophilic joint damage. Considering that albumin, the most abundant plasma protein, is a physiologic iron chelator, we aim to demonstrate that impediment of haemoglobin oxidation is exerted by plasma as a mechanism involved in the therapeutic effect of intra\u2010articular injection of platelet\u2010rich plasma in CHS.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Oxidation of haemoglobin (Hb) to methaemoglobin (MeHb) through Fenton reaction was induced in vitro by addition of potassium ferricyanide in the presence or absence of peripheral blood\u2010derived platelets\u2010rich or platelets\u2010poor plasma (PRP\/PPP) or albumin. The relevance of in vitro findings was analysed in synovial fluid (SF) samples from one patient with CHS obtained before and after 6\u00a0months of PRP intra\u2010articular injection.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>MeHb formation was completely impaired either by of PPP, PRP or albumin indicating that PRP exerts an anti\u2010oxidative effect, probably due by plasma albumin. Analysis of SF samples revealed the presence of MeHb levels and haemosiderin\u2010laden macrophages in SF obtained before PRP treatment. Reduction of synovial MeHb, normalization of cellular composition and improvement of health joint haemophilic score, pain and bleeding episodes were registered after 6\u00a0months of PRP intra\u2010articular injection.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>Inhibition of Fenton reaction and the consequent normalization of joint cellular composition is a noncanonical mechanism underlying the therapeutic effect of PRP intra\u2010articular injection in CHS.<\/jats:p><\/jats:sec>","DOI":"10.1111\/hae.14075","type":"journal-article","created":{"date-parts":[[2020,6,12]],"date-time":"2020-06-12T11:59:54Z","timestamp":1591963194000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["Inhibition of Fenton reaction is a novel mechanism to explain the therapeutic effect of intra\u2010articular injection of PRP in patients with chronic haemophilic synovitis"],"prefix":"10.1111","volume":"26","author":[{"given":"Horacio","family":"Caviglia","sequence":"first","affiliation":[{"name":"Dr Juan A. Fern\u00e1ndez General Hospital CABA Argentina"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Carla","family":"Daffunchio","sequence":"additional","affiliation":[{"name":"Dr Juan A. Fern\u00e1ndez General Hospital CABA Argentina"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gustavo","family":"Galatro","sequence":"additional","affiliation":[{"name":"Dr Juan A. Fern\u00e1ndez General Hospital CABA Argentina"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Guillermo","family":"Cambiaggi","sequence":"additional","affiliation":[{"name":"Dr Juan A. 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