{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,12,26]],"date-time":"2025-12-26T05:16:10Z","timestamp":1766726170252,"version":"3.48.0"},"reference-count":54,"publisher":"MDPI AG","issue":"1","license":[{"start":{"date-parts":[[2025,12,24]],"date-time":"2025-12-24T00:00:00Z","timestamp":1766534400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001807","name":"FAPESP","doi-asserted-by":"crossref","award":["2017\/17844-8"],"award-info":[{"award-number":["2017\/17844-8"]}],"id":[{"id":"10.13039\/501100001807","id-type":"DOI","asserted-by":"crossref"}]},{"DOI":"10.13039\/501100001807","name":"FAPESP","doi-asserted-by":"crossref","award":["2019\/12301-1"],"award-info":[{"award-number":["2019\/12301-1"]}],"id":[{"id":"10.13039\/501100001807","id-type":"DOI","asserted-by":"crossref"}]},{"DOI":"10.13039\/501100001807","name":"FAPESP","doi-asserted-by":"crossref","award":["2022\/01951-8"],"award-info":[{"award-number":["2022\/01951-8"]}],"id":[{"id":"10.13039\/501100001807","id-type":"DOI","asserted-by":"crossref"}]},{"DOI":"10.13039\/501100005942","name":"Funda\u00e7\u00e3o Butantan","doi-asserted-by":"crossref","id":[{"id":"10.13039\/501100005942","id-type":"DOI","asserted-by":"crossref"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJMS"],"abstract":"<jats:p>The incorporation of drugs into nanostructured silica has proven to be an effective strategy for delaying drug release, protecting against enzymatic degradation, and enhancing therapeutic efficacy. Specifically, crotoxin, a component derived from the venom of Crotalus durissus terrificus, exhibits notable analgesic and immunomodulatory properties. Previous studies have demonstrated that encapsulating crotoxin within SBA-15 nanostructured mesoporous silica not only reduces its toxicity and enhances its analgesic effects but also enables effective oral administration. Given its promising efficacy and the expanding interest in its application across various experimental models and potential therapeutic uses, this study aimed to conduct a detailed analysis of the physicochemical properties of crotoxin when incorporated into SBA-15 silica. Following characterization, the crotoxin\u2013SBA-15 complex was orally administered to mice in an experimental model of ulcerative colitis (UC). The most widely adopted experimental model for studying UC involves the administration of dextran sodium sulfate (DSS) in drinking water to induce colonic inflammation in susceptible animals. In this study, we hypothesized that crotoxin incorporated into ordered mesoporous silica (SBA-15) could modulate DSS-induced UC. Crotoxin was successfully incorporated into SBA-15 and administered orally, as its physicochemical properties supported this route of delivery. Mice received the crotoxin\u2013SBA-15 complex either at the onset of UC induction or on days 1 and 4 after DSS exposure. Seven days after the start of DSS administration, we observed a substantial reduction (approximately 50%) in Disease Activity Index (DAI) scores, accompanied by marked improvements in the histopathological features of the colon. These findings indicate for the first time that crotoxin incorporated into SBA-15 exhibits significant therapeutic potential in the treatment of experimentally induced ulcerative colitis.<\/jats:p>","DOI":"10.3390\/ijms27010185","type":"journal-article","created":{"date-parts":[[2025,12,24]],"date-time":"2025-12-24T09:58:34Z","timestamp":1766570314000},"page":"185","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Oral Nano-Delivery of Crotoxin Modulates Experimental Ulcerative Colitis in a Mouse Model of Maximum Acute Inflammatory Response"],"prefix":"10.3390","volume":"27","author":[{"given":"Raquel Guedes","family":"de Oliveira Brito","sequence":"first","affiliation":[{"name":"Immunogenetics Laboratory, Butantan Institute, S\u00e3o Paulo 05503-900, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Fernanda Narangeira","family":"de Araujo 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Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1281-0521","authenticated-orcid":false,"given":"Jos\u00e9 Luiz de Souza","family":"Lopes","sequence":"additional","affiliation":[{"name":"Department of Physics, FFCLRP, University of S\u00e3o Paulo, Ribeir\u00e3o Preto 14040-900, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6862-8716","authenticated-orcid":false,"given":"Marcia Carvalho de Abreu","family":"Fantini","sequence":"additional","affiliation":[{"name":"Physics Institute, University of S\u00e3o Paulo, S\u00e3o Paulo 05508-220, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5711-1444","authenticated-orcid":false,"given":"Pedro Leonidas","family":"Oseliero Filho","sequence":"additional","affiliation":[{"name":"Physics Institute, University of S\u00e3o Paulo, S\u00e3o Paulo 05508-220, Brazil"},{"name":"Materials 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