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JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
Effects of topical methotrexate loaded gold nanoparticle in cutaneous inflammatory mouse model.
Gold nanoparticles functionalized with 3-mercapto-1-propansulfonate (AuNPs-3MPS) have been prepared and loaded with Methotrexate (MTX), an immunosuppressive agent used in the systemic treatment of moderate-severe inflammatory diseases. The effects of the AuNPs-3MPS@MTX topically administered in vitro on skin model and in vivo on imiquimod-induced psoriasis-like mice model, have been studied. Clinical response, epidermal thickness, cell proliferation rate and inflammation were tested. AuNPs-3MPS@MTX treated mice showed a decreasing of scaling and erythema score, reduction of epidermal thickness, parakeratosis and hyperkeratosis, compared to AuNPs-3MPS treated mice. Immunohistochemistry analysis staining displayed that Ki67, K6 CD3 and CD8 stainings were reduced in AuNPs-3MPS@MTX treated mice. Blood evaluation showed no differences in blood count and in ALT and AST levels before and after AuNPs-3MPS or AuNPs-3MPS@MTX treatment. Topical AuNPs-3MPS@MTX treatment is able to induce a reduction of keratinocytes hyperproliferation, epidermal thickness and also inflammatory infiltrate in vivo on imiquimod-induced psoriasis like mice model.
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