{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,20]],"date-time":"2025-10-20T00:17:50Z","timestamp":1760919470875,"version":"build-2065373602"},"reference-count":0,"publisher":"Wiley","issue":"6","license":[{"start":{"date-parts":[[1999,6,1]],"date-time":"1999-06-01T00:00:00Z","timestamp":928195200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Journal of Periodontology"],"published-print":{"date-parts":[[1999,6]]},"abstract":"<jats:p><jats:bold>Background:<\/jats:bold> <jats:italic> Porphyromonas gingivalis<\/jats:italic> is associated with the initiation and progression of adult periodontitis. The outer membrane proteins of the bacteria are potentially important targets for interaction with host defense systems. A 40\u2010kDa outer membrane protein (40\u2010kDa OMP) is conserved among many strains of <jats:italic>P. gingivalis<\/jats:italic>. We have cloned the gene for 40\u2010kDa OMP from <jats:italic>P. gingivalis<\/jats:italic> 381 and produced a recombinant protein. For the development of recombinant 40\u2010kDa OMP as a component of a vaccine for passive immunization, the elucidation of the roles of the anti\u2010recombinant 40\u2010kDa OMP antibody in the host defense against <jats:italic>P. gingivalis<\/jats:italic> is essential. The objective of this study was to determine the opsonic capacity of the antibody for phagocytosis by neutrophils which play a key role in the immune response to microbial infections.<\/jats:p><jats:p><jats:bold>Methods:<\/jats:bold> To test the opsonic activity of a rabbit polyclonal antibody against r40\u2010kDa OMP (r40\u2010kDa OMP Ab) on human neutrophils to phagocytize <jats:italic>P. gingivalis<\/jats:italic>, we constructed a reproducible in vitro model of <jats:italic>P. gingivalis<\/jats:italic>\u2010neutrophil interaction using the human promyelocytic cell line HL\u201060.<\/jats:p><jats:p><jats:bold>Results:<\/jats:bold> We demonstrated that r40\u2010kDa OMP Ab in the presence of human complement successfully opsonized [<jats:sup>3<\/jats:sup>H]\u2010thymidine\u2010labeled <jats:italic>P. gingivalis<\/jats:italic> as a target for phagocytosis by HL\u201060 cells differentiated with dimethyl sulfoxide. The phagocytized bacteria were then intracellularly killed and lysed, and the radioactive degradation debris egested into the culture medium.<\/jats:p><jats:p><jats:bold>Conclusions:<\/jats:bold> We conclude that antibody against r40\u2010kDa OMP has opsonic activity on human neutrophil function for phagocytosis of <jats:italic>P. gingivalis<\/jats:italic>. Subgingival bacteria are coated in vivo with immunoglobulin and complement. When the antibody is specific for crevicular bacteria, immunological interactions can be expected in the crevice. Our observations suggest that the anti\u2010recombinant 40\u2010kDa OMP antibody in concert with the crevicular complement may prevent <jats:italic>P. gingivalis<\/jats:italic> colonization r40\u2010kDa OMP may contribute to the development of a local immunotherapy when applied to the crevice of a patient with <jats:italic>P. gingivalis<\/jats:italic>\u2010related periodontitis which relates to susceptibility for certain systemic diseases such as diabetes mellitus, cardiovascular disease, and preterm labor.<jats:italic>J Periodontol 1999;70:610\u2010617.<\/jats:italic><\/jats:p>","DOI":"10.1902\/jop.1999.70.6.610","type":"journal-article","created":{"date-parts":[[2005,2,2]],"date-time":"2005-02-02T06:10:57Z","timestamp":1107324657000},"page":"610-617","source":"Crossref","is-referenced-by-count":11,"title":["Opsonophagocytic Effect of Antibody Against Recombinant Conserved 40\u2010kDa Outer Membrane Protein of <i>Porphyromonas gingivalis<\/i>"],"prefix":"10.1002","volume":"70","author":[{"given":"Shigeno","family":"Saito","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mitsuo","family":"Hayakawa","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hisashi","family":"Takiguchi","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yoshimitsu","family":"Abiko","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[1999,6]]},"container-title":["Journal of Periodontology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/aap.onlinelibrary.wiley.com\/doi\/pdf\/10.1902\/jop.1999.70.6.610","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,19]],"date-time":"2025-10-19T08:41:12Z","timestamp":1760863272000},"score":1,"resource":{"primary":{"URL":"https:\/\/aap.onlinelibrary.wiley.com\/doi\/10.1902\/jop.1999.70.6.610"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1999,6]]},"references-count":0,"journal-issue":{"issue":"6","published-print":{"date-parts":[[1999,6]]}},"alternative-id":["10.1902\/jop.1999.70.6.610"],"URL":"https:\/\/doi.org\/10.1902\/jop.1999.70.6.610","archive":["Portico"],"relation":{},"ISSN":["0022-3492","1943-3670"],"issn-type":[{"type":"print","value":"0022-3492"},{"type":"electronic","value":"1943-3670"}],"subject":[],"published":{"date-parts":[[1999,6]]}}}