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This study validated the potential of <jats:italic>Lactobacillus helveticus<\/jats:italic> HY7801 as a probiotic to benefit vaginal health. In vivo, HY7801 reduced the number of <jats:italic>Gardnerella vaginalis<\/jats:italic> (GV) and pro-inflammatory cytokines in the vagina of GV-induced BV mice and ameliorated vaginal histological changes. In vitro, HY7801 exhibited positive resistance to simulated gastrointestinal conditions, showed excellent adherence ability to the female genital epithelium, and had high lactic acid and H<jats:sub>2<\/jats:sub>O<jats:sub>2<\/jats:sub> production capacity. Furthermore, it was found that HY7801 can alleviate BV because it can suppress the expression of virulence factor genes of GV involved in epithelial cell adhesion and biofilm formation along with antibacterial activity against GV. These results indicate that HY7801 can be used as a promising probiotic strain for the maintenance of a healthy vaginal physiological state.\n<\/jats:p>","DOI":"10.1007\/s10068-022-01208-7","type":"journal-article","created":{"date-parts":[[2022,12,1]],"date-time":"2022-12-01T18:25:32Z","timestamp":1669919132000},"page":"507-515","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":14,"title":["Lactobacillus helveticus HY7801 ameliorates bacterial vaginosis by inhibiting biofilm formation and epithelial cell adhesion of Gardnerella vaginalis"],"prefix":"10.1007","volume":"32","author":[{"given":"Joo Yun","family":"Kim","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Eun Chae","family":"Moon","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ju-Yeon","family":"Kim","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hyeon Ji","family":"Kim","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5874-9389","authenticated-orcid":false,"given":"Keon","family":"Heo","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jae-Jung","family":"Shim","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jung-Lyoul","family":"Lee","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2022,12,1]]},"reference":[{"key":"1208_CR1","doi-asserted-by":"publisher","first-page":"4","DOI":"10.1186\/s40779-016-0074-5","volume":"3","author":"CT Bautista","year":"2016","unstructured":"Bautista CT, Wurapa E, Sateren WB, Morris S, Hollingsworth B, Sanchez JL. 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