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Despite its importance, the direct anti-inflammatory effects of purified MAM have never been evaluated in vitro or in intestinal inflammation models. Prior studies have relied on bacterial supernatants, synthetic peptides, or DNA delivery systems, each with inherent limitations.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>In this study, we produced and purified recombinant MAM (R-MAM) under denaturing conditions and, for the first time, demonstrated its direct anti-inflammatory activity in vitro and its protective effects in a colitis murine model. Despite numerous attempts, we were not able to obtain a non-aggregated R-MAM. Therefore, we can assume that the R-MAM used here is partly or totally denatured. Nevertheless, in vitro assays with human intestinal epithelial cells (HT-29) and peripheral blood mononuclear cells (PBMCs) confirmed the ability of MAM to induce an anti-inflammatory cytokine profile. In addition, in a DNBS-induced colitis model, oral administration of R-MAM significantly prevented weight loss and reduced colon weight and thickness, key macroscopic indicators of inflammation.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>These findings provide a critical validation step for the therapeutic potential of MAM in intestinal inflammation, despite its purification under denaturing conditions. Future studies should focus on optimizing protein stability and conformational integrity to increase its therapeutic potential as a biotherapeutic agent.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Graphical Abstract<\/jats:title>\n                  <\/jats:sec>","DOI":"10.1186\/s12934-025-02877-9","type":"journal-article","created":{"date-parts":[[2025,12,6]],"date-time":"2025-12-06T09:15:04Z","timestamp":1765012504000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Recombinant MAM from Faecalibacterium duncaniae exhibits a protective effect in DNBS-induced colitis"],"prefix":"10.1186","volume":"25","author":[{"given":"Tha\u00eds","family":"Vilela Rodrigues","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lu\u00eds Lima","family":"de Jesus","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Monique Ferrary","family":"Am\u00e9rico","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Florian","family":"Chain","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Laura","family":"Creusot","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Nathalie","family":"Rolhion","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Anne","family":"Aucouturier","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Luis","family":"Bermudez-Humaran","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Philippe","family":"Langella","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Vasco Ariston","family":"de Carvalho Azevedo","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jean-Marc","family":"Chatel","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2025,12,6]]},"reference":[{"key":"2877_CR1","doi-asserted-by":"publisher","first-page":"1","DOI":"10.1016\/j.cytogfr.2023.07.001","volume":"71\u201372","author":"J Liu","year":"2023","unstructured":"Liu J, Di B, Xu LL. 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