{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,9]],"date-time":"2026-09-09T05:38:50Z","timestamp":1788932330563,"version":"build-2803163510"},"reference-count":37,"publisher":"SAGE Publications","issue":"12","license":[{"start":{"date-parts":[[2022,12,1]],"date-time":"2022-12-01T00:00:00Z","timestamp":1669852800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Journal of Women's Health"],"published-print":{"date-parts":[[2022,12]]},"abstract":"<jats:sec>\n                    <jats:title>Objective:<\/jats:title>\n                    <jats:p>\n                      The ideal vaginal environment is maintained by\n                      <jats:italic toggle=\"yes\">Lactobacillus<\/jats:italic>\n                      species, which keep the vagina clean and free of infections, boost fertility and immunity. Age-related decline in estrogen affects\n                      <jats:italic toggle=\"yes\">Lactobacillus<\/jats:italic>\n                      population, leading to dominance of nonoptimal species and increased diversity in vaginal microbiota. In this study, we compared the differences between the vaginal microbiota of pre- and postmenopausal women. We also examined the relationships between vaginal and gut microbiota, their relationships with sex hormones and equol-producing ability.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Materials and Methods:<\/jats:title>\n                    <jats:p>This was a cross-sectional study of 35 premenopausal and 35 postmenopausal women (age range: 27\u201376 years). We compared parameters such as the composition of the gut and vaginal microbiota, vaginal pH, estradiol, follicular stimulating hormone, and urinary equol concentration.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results:<\/jats:title>\n                    <jats:p>\n                      In the vaginal microbiota of premenopausal women,\n                      <jats:italic toggle=\"yes\">Lactobacillus<\/jats:italic>\n                      species constituted \u223c71.98%, and nonoptimal species constituted \u223c16.87%. They were 10.08% and 26.78%, respectively, in the vaginal microbiota of postmenopausal women. The proportion of\n                      <jats:italic toggle=\"yes\">Lactobacillus<\/jats:italic>\n                      was significantly low, whereas microbial diversity and vaginal pH were significantly high (\n                      <jats:italic toggle=\"yes\">p<\/jats:italic>\n                      \u2009&lt;\u20090.0001) in postmenopausal women. The compositions of the vaginal microbiota were significantly different in pre- and postmenopausal women. However, such differences were not noticeable in the gut microbiota. Urinary equol production had no significant correlation with vaginal microbiota, although it had significant relationships with gut microbiota in postmenopausal women. In both groups, the proportions of vaginal\n                      <jats:italic toggle=\"yes\">Lactobacillus<\/jats:italic>\n                      were inversely correlated with vaginal microbial diversity and vaginal pH.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion:<\/jats:title>\n                    <jats:p>\n                      Postmenopausal women had significantly low\n                      <jats:italic toggle=\"yes\">Lactobacillus<\/jats:italic>\n                      and high nonoptimal species in their vaginal flora, whereas such age-related differences were not identified in gut microbiota. Urinary equol concentration had significant correlation with gut microbiota in postmenopausal women only. This study was registered with the University Hospital Medical Information Network (UMIN) Clinical Trial Registry (Trial registration No.: UMIN000043944).\n                    <\/jats:p>\n                  <\/jats:sec>","DOI":"10.1089\/jwh.2022.0114","type":"journal-article","created":{"date-parts":[[2022,11,14]],"date-time":"2022-11-14T10:44:07Z","timestamp":1668422647000},"page":"1763-1772","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":30,"title":["Age-Related Changes, Influencing Factors, and Crosstalk Between Vaginal and Gut Microbiota: A Cross-Sectional Comparative Study of Pre- and Postmenopausal Women"],"prefix":"10.1177","volume":"31","author":[{"given":"Remi","family":"Yoshikata","sequence":"first","affiliation":[{"name":"Hamamatsucho Hamasite Clinic, Minato-ku, Tokyo, Japan."},{"name":"Tokyo Midtown Medical Center, Minato-ku, Tokyo, Japan."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Michiko","family":"Yamaguchi","sequence":"additional","affiliation":[{"name":"Hamamatsucho Hamasite Clinic, Minato-ku, Tokyo, Japan."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yuri","family":"Mase","sequence":"additional","affiliation":[{"name":"Hamamatsucho Hamasite Clinic, Minato-ku, Tokyo, Japan."},{"name":"Tokyo Midtown Medical Center, Minato-ku, Tokyo, Japan."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ayano","family":"Tatsuzuki","sequence":"additional","affiliation":[{"name":"Hamamatsucho Hamasite Clinic, Minato-ku, Tokyo, Japan."},{"name":"Tokyo Midtown Medical Center, Minato-ku, Tokyo, Japan."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5553-1245","authenticated-orcid":false,"given":"Khin Zay Yar","family":"Myint","sequence":"additional","affiliation":[{"name":"Tokyo Midtown Medical Center, Minato-ku, Tokyo, Japan."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hiroaki","family":"Ohta","sequence":"additional","affiliation":[{"name":"Kawasaki Medical School Hospital, Okayama, Japan."},{"name":"Fujita Health University Hospital, International Medical Center, Aichi, Japan."}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2022,12,13]]},"reference":[{"key":"e_1_3_4_2_2","doi-asserted-by":"publisher","DOI":"10.3389\/fmed.2018.00181"},{"key":"e_1_3_4_3_2","doi-asserted-by":"publisher","DOI":"10.1073\/pnas.1002611107"},{"key":"e_1_3_4_4_2","doi-asserted-by":"publisher","DOI":"10.1126\/scitranslmed.3003605"},{"key":"e_1_3_4_5_2","doi-asserted-by":"publisher","DOI":"10.1093\/humrep\/dew026"},{"key":"e_1_3_4_6_2","doi-asserted-by":"publisher","DOI":"10.1038\/srep16865"},{"key":"e_1_3_4_7_2","doi-asserted-by":"publisher","DOI":"10.1371\/journal.pone.0153274"},{"key":"e_1_3_4_8_2","doi-asserted-by":"publisher","DOI":"10.1128\/AEM.72.2.1027-1033.2006"},{"key":"e_1_3_4_9_2","doi-asserted-by":"publisher","DOI":"10.1073\/pnas.1000097107"},{"key":"e_1_3_4_10_2","doi-asserted-by":"publisher","DOI":"10.1186\/1471-2180-9-123"},{"key":"e_1_3_4_11_2","first-page":"43","article-title":"Age-related changes in gut microbiota composition from newborn to centenarian: A cross-sectional study. 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