{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,8]],"date-time":"2026-03-08T04:34:54Z","timestamp":1772944494869,"version":"3.50.1"},"reference-count":72,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2024,1,12]],"date-time":"2024-01-12T00:00:00Z","timestamp":1705017600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Ministry of Science and Higher Education of the Russian Federation (Ural Federal University Program of Development within the Priority-2030 Program)","award":["FPH86"],"award-info":[{"award-number":["FPH86"]}]},{"name":"Research Council of the Saint Joseph University-Faculty of Medicine","award":["FPH86"],"award-info":[{"award-number":["FPH86"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Nutrients"],"abstract":"<jats:p>Circadian rhythm disruption is increasingly considered an environmental risk factor for the development and exacerbation of inflammatory bowel disease. We have reported in a previous study that nychthemeral dysregulation is associated with an increase in intestinal barrier permeability and inflammation in mice with dextran sulfate sodium (DSS)-induced colitis. To investigate the effect of circadian rhythm disruption on the composition and diversity of the gut microbiota (GM), sixty male C57BL\/6J mice were initially divided to two groups, with the shifted group (n = 30) exposed to circadian shifts for three months and the non-shifted group (n = 30) kept under a normal light\u2013dark cycle. The mice of the shifted group were cyclically housed for five days under the normal 12:12 h light\u2013dark cycle, followed by another five days under a reversed light\u2013dark cycle. At the end of the three months, a colitis was induced by 2% DSS given in the drinking water of 30 mice. Animals were then divided into four groups (n = 15 per group): sham group non-shifted (Sham-NS), sham group shifted (Sham-S), DSS non-shifted (DSS-NS) and DSS shifted (DSS-S). Fecal samples were collected from rectal content to investigate changes in GM composition via DNA extraction, followed by high-throughput sequencing of the bacterial 16S rRNA gene. The mouse GM was dominated by three phyla: Firmicutes, Bacteroidetes and Actinobacteria. The Firmicutes\/Bacteroidetes ratio decreased in mice with induced colitis. The richness and diversity of the GM were reduced in the colitis group, especially in the group with inverted circadian rhythm. Moreover, the GM composition was modified in the inverted circadian rhythm group, with an increase in Alloprevotella, Turicibacter, Bacteroides and Streptococcus genera. Circadian rhythm inversion exacerbates GM dysbiosis to a less rich and diversified extent in a DSS-induced colitis model. These findings show possible interplay between circadian rhythm disruption, GM dynamics and colitis pathogenesis.<\/jats:p>","DOI":"10.3390\/nu16020247","type":"journal-article","created":{"date-parts":[[2024,1,12]],"date-time":"2024-01-12T11:43:53Z","timestamp":1705059833000},"page":"247","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Circadian Rhythm Perturbation Aggravates Gut Microbiota Dysbiosis in Dextran Sulfate Sodium-Induced Colitis in Mice"],"prefix":"10.3390","volume":"16","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8490-8451","authenticated-orcid":false,"given":"Joseph","family":"Amara","sequence":"first","affiliation":[{"name":"Laboratoire de Recherche en Physiologie et Physiopathologie, P\u00f4le Technologie Sant\u00e9, Facult\u00e9 de M\u00e9decine, Universit\u00e9 Saint Joseph, Beirut 1104 2020, Lebanon"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2113-6543","authenticated-orcid":false,"given":"Tarek","family":"Itani","sequence":"additional","affiliation":[{"name":"Laboratoire de Microbiologie, Facult\u00e9 de Pharmacie, Universit\u00e9 Saint Joseph, Beirut 1104 2020, Lebanon"}]},{"given":"Joelle","family":"Hajal","sequence":"additional","affiliation":[{"name":"Laboratoire de Recherche en Physiologie et Physiopathologie, P\u00f4le Technologie Sant\u00e9, Facult\u00e9 de M\u00e9decine, Universit\u00e9 Saint Joseph, Beirut 1104 2020, Lebanon"}]},{"given":"Jules-Joel","family":"Bakhos","sequence":"additional","affiliation":[{"name":"Laboratoire de Recherche en Physiologie et Physiopathologie, P\u00f4le Technologie Sant\u00e9, Facult\u00e9 de M\u00e9decine, Universit\u00e9 Saint Joseph, Beirut 1104 2020, Lebanon"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8093-2593","authenticated-orcid":false,"given":"Youakim","family":"Saliba","sequence":"additional","affiliation":[{"name":"Laboratoire de Recherche en Physiologie et Physiopathologie, P\u00f4le Technologie Sant\u00e9, Facult\u00e9 de M\u00e9decine, Universit\u00e9 Saint Joseph, Beirut 1104 2020, Lebanon"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9716-9229","authenticated-orcid":false,"given":"Saied A.","family":"Aboushanab","sequence":"additional","affiliation":[{"name":"Institute of Chemical Engineering, Ural Federal University Named after the First President of Russia B. N. Yeltsin, Mira 19, Yekaterinburg 620002, Russia"}]},{"given":"Elena G.","family":"Kovaleva","sequence":"additional","affiliation":[{"name":"Institute of Chemical Engineering, Ural Federal University Named after the First President of Russia B. N. Yeltsin, Mira 19, Yekaterinburg 620002, Russia"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2935-2611","authenticated-orcid":false,"given":"Nassim","family":"Fares","sequence":"additional","affiliation":[{"name":"Laboratoire de Recherche en Physiologie et Physiopathologie, P\u00f4le Technologie Sant\u00e9, Facult\u00e9 de M\u00e9decine, Universit\u00e9 Saint Joseph, Beirut 1104 2020, Lebanon"}]},{"given":"Alicia C.","family":"Mondragon","sequence":"additional","affiliation":[{"name":"Laboratorio de Higiene, Inspecci\u00f3n y Control de Alimentos, Departamento de Qu\u00edmica Anal\u00edtica, Nutrici\u00f3n y Bromatolog\u00eda, Campus Terra, Universidade da Santiago de Compostela, 27002 Lugo, Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7992-1491","authenticated-orcid":false,"given":"Jose Manuel","family":"Miranda","sequence":"additional","affiliation":[{"name":"Laboratorio de Higiene, Inspecci\u00f3n y Control de Alimentos, Departamento de Qu\u00edmica Anal\u00edtica, Nutrici\u00f3n y Bromatolog\u00eda, Campus Terra, Universidade da Santiago de Compostela, 27002 Lugo, Spain"}]}],"member":"1968","published-online":{"date-parts":[[2024,1,12]]},"reference":[{"key":"ref_1","first-page":"7","article-title":"European Crohn\u2019s and Colitis Organisation. 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