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Recent studies suggest that propolis has obvious neuroprotective properties and functionality in regulating intestinal bacteria flora, hinting at a potential key effect at both terminals of this axis regulation. However, currently no clear evidence confirms the effects of propolis on alcohol-induced depression. Here, we establish an alcoholic depression model with C57BL\/6J mice and demonstrate that treatment with propolis protects against alcohol-induced depressive symptoms by behavioral tests. In addition, propolis attenuates the injury of nerve cells in the hippocampal region and restores the serum levels of brain-derived neurotrophic factor (BDNF) and dopamine (DA) in mice with alcohol-induced depression. Pathology and biotin tracer assays show that propolis repairs the intestinal leakage caused by alcohol. Additionally, propolis treatment increases the expression levels of intestinal intercellular tight junctions\u2019 (TJs\u2019) structural proteins Claudin-1, Occludin and zona occludens-1 (ZO-1), as well as the activation state of the liver kinase B1\/AMP-activated protein kinase (LKB1\/AMPK) signaling pathway, which is closely related to the intestinal permeability. Furthermore, propolis can reduce the levels of pro-inflammatory, lipopolysaccharide (LPS) and fatty-acid-binding protein 2 (FABP2), suggesting the significance of the inflammatory response in alcoholic depression. Collectively, our findings indicate that propolis exerted an improving effect on alcohol-induced depressive symptoms by ameliorating brain gut dysfunction.<\/jats:p>","DOI":"10.3390\/nu14061213","type":"journal-article","created":{"date-parts":[[2022,3,13]],"date-time":"2022-03-13T21:44:17Z","timestamp":1647207857000},"page":"1213","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":34,"title":["Propolis Ameliorates Alcohol-Induced Depressive Symptoms in C57BL\/6J Mice by Regulating Intestinal Mucosal Barrier Function and Inflammatory Reaction"],"prefix":"10.3390","volume":"14","author":[{"given":"Peng","family":"Wang","sequence":"first","affiliation":[{"name":"The Institute of Human Nutrition, Qingdao University, Ning Xia Road 308, Qingdao 266071, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Peiyu","family":"Guo","sequence":"additional","affiliation":[{"name":"The Institute of Human Nutrition, Qingdao University, Ning Xia Road 308, Qingdao 266071, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yanhui","family":"Wang","sequence":"additional","affiliation":[{"name":"The Institute of Human Nutrition, Qingdao University, Ning Xia Road 308, Qingdao 266071, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiangyun","family":"Teng","sequence":"additional","affiliation":[{"name":"The Institute of Human Nutrition, Qingdao University, Ning Xia Road 308, Qingdao 266071, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Huaqi","family":"Zhang","sequence":"additional","affiliation":[{"name":"The Institute of Human Nutrition, Qingdao University, Ning Xia Road 308, Qingdao 266071, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lirui","family":"Sun","sequence":"additional","affiliation":[{"name":"The Institute of Human Nutrition, Qingdao University, Ning Xia Road 308, Qingdao 266071, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Meilan","family":"Xue","sequence":"additional","affiliation":[{"name":"Department of Biochemistry and Molecular Biology, Basic Medical College, Qingdao University of Medicine, Ningxia Road 308, Qingdao 266071, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0675-6963","authenticated-orcid":false,"given":"Hui","family":"Liang","sequence":"additional","affiliation":[{"name":"The Institute of Human Nutrition, Qingdao University, Ning Xia Road 308, Qingdao 266071, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2022,3,12]]},"reference":[{"key":"ref_1","first-page":"1517","article-title":"Depression is the leading cause of disability around the world","volume":"317","author":"Friedrich","year":"2017","journal-title":"JAMA"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"480","DOI":"10.2174\/1570159X1304150831123535","article-title":"Editorial (Thematic selection: A systematic review of depression)","volume":"13","author":"Cui","year":"2015","journal-title":"CN"},{"key":"ref_3","unstructured":"WHO (2017). 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