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The gut-brain axis, modulated by gut microbiota (GM), is influenced by dietary compounds that can alter its composition. Despite advances in the understanding of PD pathophysiology, effective treatments remain limited, underscoring the need for novel therapeutic approaches. Among plant-derived compounds, the flavonoid rutin has shown significant antioxidant, anti-inflammatory, and neuroprotective properties in vivo. This study evaluated the effects of rutin on leukocyte infiltration, intestinal morphology, and GM composition in an experimental model of PD. Adult male Wistar rats received a stereotaxic injection of 6-hydroxydopamine (6-OHDA) and were treated orally with rutin (10\u00a0mg\/kg) for 14\u00a0days. Intestinal segments were analyzed histomorphometrically, and fecal samples were assessed for the abundance of Firmicutes, Bacteroidetes, Prevotellacea, Entererobactereacea,\n                    <jats:italic>Bifidobacterium<\/jats:italic>\n                    sp and\n                    <jats:italic>Lactobacillus<\/jats:italic>\n                    sp. by PCR. Rutin administration significantly reduced intraepithelial lymphocyte infiltration and goblet cell numbers in the ileum and colon and prevented hyperplasia of Paneth cells in the ileum. Importantly, GM composition remained unchanged following rutin treatment. These findings demonstrated that rutin reduces intestinal inflammation in PD models without altering gut microbiota composition, highlighting its potential as a therapeutic strategy.\n                  <\/jats:p>","DOI":"10.1007\/s12640-026-00789-z","type":"journal-article","created":{"date-parts":[[2026,3,28]],"date-time":"2026-03-28T11:27:50Z","timestamp":1774697270000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Flavonoid Rutin Reduces Intestinal Inflammation in an Experimental Model of Parkinson's Disease"],"prefix":"10.1007","volume":"44","author":[{"given":"Livia Bacelar","family":"De Jesus","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Annyta Fernandes","family":"Frota","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fillipe Mendes","family":"De Ara\u00fajo","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fabine Correia","family":"Passos","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nestor Adrian Guerrero","family":"Gutierrez","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Luana Brunelly Araujo","family":"de Lima","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Victor Diogenes Amaral","family":"Silva","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gyselle Chrystina","family":"Baccan","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marcelo Biondaro","family":"Gois","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Silvia Lima","family":"Costa","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2026,3,28]]},"reference":[{"issue":"3","key":"789_CR1","doi-asserted-by":"publisher","first-page":"473","DOI":"10.1007\/s00018-018-2943-4","volume":"76","author":"A Adak","year":"2019","unstructured":"Adak A, Khan MR (2019) An insight into gut microbiota and its functionalities. 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