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Study identifier: NCT06847321 Synced from ClinicalTrials.gov · August 02, 2026
● Recruiting

Study of LHP588 in Subjects With P. Gingivalis-Positive Alzheimer's Disease

Condition: Alzheimer Disease · Alzheimer Disease Due to P. Gingivalis  ·  Sponsor: Lighthouse Pharmaceuticals, Inc.

PhasePhase 2
Planned participants300
Who can joinAll sexes, 55 Years to 80 Years
Healthy volunteersNo

About this study

This study is to test LHP588 in persons who have mild to moderate Alzheimer's disease (AD) who have shown progressive mental decline in the last year and who have P. gingivalis (Pg) infection. P. gingivalis infection has been linked to the development of dementia. LHP588 is designed to target the P. gingivalis bacterium, to potentially help to halt or slow down the progression of AD and its symptoms. A saliva test will be done to determine P. gingivalis infection. Tests for AD include standard questionnaires such as MMSE and a blood test for pTau217. Treatment will be blinded, meaning the participant and the doctor will not know if the participant is receiving LHP588 or placebo. The total time for participation in the study may be up to 64 weeks. This includes a screening period (to ensure the participant is suitable for the study and the study is suitable for the participant) of up to 12 weeks, a treatment period of up to 48 weeks, and a safety follow-up period of 4 weeks after the last dose of the study drug to check the participant's overall health. Treatment is a once-a-day capsule. Caregiver participation is required. The study requires the participant to visit the study center (with the caregiver) at least 20 times within 64 weeks (this does not include any unplanned visits that may be recommended by the study doctor). In addition, the study doctor or clinic staff will contact the participant via phone at least 1 time.

This description comes directly from the study's public registry record.

Talk to the study team

Joanna Bolger  ·  858-248-5124  ·  jbolger@lighthousepharma.com

Always discuss trial participation with your own doctor first.

Locations (40)

Banner Alzheimer's InstitutePhoenix, Arizona, United StatesRecruiting
Barrow Neurological InstitutePhoenix, Arizona, United StatesRecruiting
Clinical EndpointsScottsdale, Arizona, United StatesRecruiting
Oakland Clinical ResearchOakland, California, United StatesRecruiting
ATP Clinical Research, Inc.Orange, California, United StatesRecruiting
Riverside Clinical ResearchRiverside, California, United StatesRecruiting
CenExel Sherman OaksSherman Oaks, California, United StatesRecruiting
CenExel Denver, COEnglewood, Colorado, United StatesRecruiting
JEM Research InstituteAtlantis, Florida, United StatesRecruiting
Brain Matters ResearchDelray Beach, Florida, United StatesRecruiting
Neuropsychiatric Research Center of Southwest FloridaFort Myers, Florida, United StatesRecruiting
Conquest Research - Lake NonaOrlando, Florida, United StatesRecruiting

+ 28 more locations — full list on the registry record.

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