{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,5]],"date-time":"2026-10-05T10:01:01Z","timestamp":1791194461691,"version":"4.1.0"},"reference-count":35,"publisher":"Wiley","issue":"6","license":[{"start":{"date-parts":[[2011,6,1]],"date-time":"2011-06-01T00:00:00Z","timestamp":1306886400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/100000002","name":"National Institutes of Health","doi-asserted-by":"publisher","award":["CA016672"],"award-info":[{"award-number":["CA016672"]}],"id":[{"id":"10.13039\/100000002","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Journal of Periodontology"],"published-print":{"date-parts":[[2011,6]]},"abstract":"<jats:p>\n                    <jats:bold>Background:<\/jats:bold>\n                    <jats:italic>Porphyromonas<\/jats:italic>\n                    <jats:italic>gingivalis<\/jats:italic>\n                    is etiologically associated with chronic periodontitis. The major fimbriae of this periodontal pathogen mediate binding to host gingival epithelial cells and fibroblasts, a critical function in the initiation of periodontitis. However, the role of fimbriae in\n                    <jats:italic>P. gingivalis<\/jats:italic>\n                    \u2013osteoblast interactions remains unknown. In the present study, the involvement of major fimbriae in the initial and long\u2010term interactions between\n                    <jats:italic>P. gingivalis<\/jats:italic>\n                    and osteoblasts is investigated.\n                  <\/jats:p>\n                  <jats:p>\n                    <jats:bold>Methods:<\/jats:bold>\n                    Primary mouse calvarial osteoblast cultures were established and inoculated with\n                    <jats:italic>P. gingivalis<\/jats:italic>\n                    ATCC 33277 or YPF1, a major fimbriae\u2013deficient mutant of\n                    <jats:italic>P. gingivalis.<\/jats:italic>\n                    Confocal microscopy images were acquired to assess bacterial invasion. DNA content measurement, real\u2010time polymerase chain reaction, and alizarin red S staining and calcium content analysis were used to study the impact of bacteria on the proliferation, differentiation, and mineralization of osteoblasts, respectively.\n                  <\/jats:p>\n                  <jats:p>\n                    <jats:bold>Results:<\/jats:bold>\n                    Compared to the parent strain, YPF1 was significantly reduced in invasion of osteoblasts after 3 hours interaction. However, extended culture of infected osteoblasts did not reveal significant differences in persistence between the two strains. Proliferation of osteoblasts was not affected by either strain, and differentiation and mineralization of osteoblasts were inhibited by both strains to comparable levels.\n                  <\/jats:p>\n                  <jats:p>\n                    <jats:bold>Conclusion:<\/jats:bold>\n                    This study reveals that major fimbriae are involved in the initial invasion of osteoblasts by\n                    <jats:italic>P. gingivalis<\/jats:italic>\n                    , but are not essential for the subsequent inhibition of osteoblast differentiation and mineralization in long\u2010term culture.\n                  <\/jats:p>","DOI":"10.1902\/jop.2010.100501","type":"journal-article","created":{"date-parts":[[2010,12,28]],"date-time":"2010-12-28T19:56:06Z","timestamp":1293566166000},"page":"909-916","source":"Crossref","is-referenced-by-count":19,"title":["Fimbriae of\n                    <i>Porphyromonas gingivalis<\/i>\n                    are Important for Initial Invasion of Osteoblasts, but Not for Inhibition of Their Differentiation and Mineralization"],"prefix":"10.1002","volume":"82","author":[{"given":"Wenjian","family":"Zhang","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jun","family":"Ju","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Todd","family":"Rigney","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gena 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