Volume 1 · Attributed research edition · Brain and cognition

Porphyromonas gingivalis and Alzheimer disease: Recent findings and potential therapies

Mark I Ryder

Journal of Periodontology · 2020-08-06 · Narrative review

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Original sourceJournal of Periodontology

Wiley · Version of record, publisher-supplied full-text XML archived in Europe PMC; correction notices linked where present.

DOI: 10.1002/jper.20-0104

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License & editionCC BY 4.0

© 2020 The Authors. Journal of Periodontology published by Wiley Periodicals LLC on behalf of American Academy of Periodontology

This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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This 2020 review predates the completed GAIN trial and must not be used as a current efficacy assessment of gingipain inhibition. Mechanistic, post-mortem and animal findings are hypothesis-generating; they do not establish a treatable bacterial cause of Alzheimer disease in humans.

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No retraction or correction notice found in the checked sources. Publisher-supplied full-text XML (article title/type and related notices), Europe PMC core publication types, and publisher-deposited Crossref update-to/updated-by/relation metadata checked on 2026-10-22. Bounded record checks are not a comprehensive guarantee of article integrity; Crossref and repository metadata may be incomplete or lag publisher updates.

Verification date: 2026-10-22

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Narrative text with normalized layout; original references retained. Figures, tables, displayed equations and separately licensed third-party material are omitted. Consult the original for definitive pagination and visual evidence.

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Text SHA-256: 4b1059a2d23c4c7c5a46f12045d1bee006e29ec4ef7708b84c64933ebd2c1f22

2,457 words in this edition.