Pilot Study: Lipoic Acid and Omega-3 Fatty Acids for Alzheimer's Prevention

Oregon Health & Science University (OHSU)

Status and phase: Completed; Phase 2; Phase 1

Conditions: Treated Hypertension

Treatments: Drug: Lipoic Acid plus Omega-3 Fatty Acids; Drug: Placebo

Study type: Interventional

Funder types: Other

Identifiers

NCT01780974

SFF01

Details and patient eligibility

About

The primary aim of the pilot study is to provide data that can be used to better determine sample size for the design of a larger clinical trial. The pilot will evaluate the effectiveness of Lipoic Acid (LA) plus Omega-3 fatty acids (Omega-3) on preventing Alzheimer's Disease (AD). The investigators will also collect data to evaluate recruitment rate, safety, and compliance over the 12 month study period.

Full description

The primary aim is to collect data so that we can determine effect size between lipoic acid plus omega-3 fatty acids and placebo on the primary outcome measure Trails B (executive function). This is designed as a pilot randomized, double-blind, placebo-controlled study with a 12 month intervention period. Thirty participants diagnosed with hypertension that is treated (systolic blood pressure 90-160 mm Hg, diastolic blood pressure 60-90 mm Hg) that have low omega-3 fatty acid levels, and normal cognitive function will be randomized to receive study drug or placebo.

Enrollment: 42 patients

Sex: All

Ages: 55+ years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• 55 years or older
• Non-demented: Montreal Cognitive Assessment > 26 and Clinical Dementia Rating = 0
• Diagnosis of Essential Hypertension with systolic 90-160 mm Hg and diastolic 60-90 mm Hg
• Stable dose of antihypertensive medication 4 month prior to study enrollment
• Stable dose of lipid lowering medication - dose must be stable for 4 months prior to study enrollment
• Low Omega-3 fatty acid Status: Omega-3 index, < 4% of total fatty acid of combined docosahexaenoic acid and eicosapentanoic acid
• Geriatric Depression Scale < 5
• General health status that will not interfere with the participant's ability to complete the study.
• Screening laboratory values within normal limits or, if abnormal, deemed clinically insignificant by the investigator
• Sufficient English language skills to complete all testing

Exclusion criteria

• Alzheimer's, Dementia or other neurodegenerative disease.
• Health conditions such as cancer diagnosed < 5 years prior to enrollment (prostate cancer gleason grade < 3 and non metastatic skin cancers are acceptable), liver disease, history of ventricular fibrillation or ventricular tachycardia, major psychiatric disorder, central nervous system diseases (e.g. brain tumor, seizure disorder)
• Insulin dependent diabetes or uncontrolled diabetes (diabetes controlled on medications other than insulin are acceptable)
• Fish intake of one 6 ounce serving > once a week less than 4 months prior to enrollment
• Omega-3 fatty acid supplement intake (e.g. fish oil capsules, cod liver oil) less than 4 months prior to enrollment
• Lipoic Acid supplementation less than 1 month prior to enrollment
• Taking systemic corticosteroids, neuroleptics, antiparkinsonian agents, and/or narcotic analgesics. Low dose sinemet and dopamine agonist taken once a day for restless leg syndrome is not an exclusion.
• Contraindications to MRI, including: subjects with intrathecal pumps, stimulators, pacemakers, aneurysm clips, non-removable hearing aids, or metal fragments in the eyes. Other exclusion criteria include the inability to lie flat on the back for 40 minutes at a time or a self-reported history of claustrophobia. Subjects with a history of hip replacement and those with well-documented, verifiable, MRI-safe cardiac stents will not be excluded from the study.
• Enrollment in another treatment study

Trial design

Primary purpose: Prevention

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Triple Blind

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42 participants in 2 patient groups, including a placebo group

Placebo

Placebo Comparator group

Description:

Three placebo oil capsules per day (2 caps morning, 1 cap evening) + 2 placebo LA capsules per day. Capsules will be taken with food or a meal.

Treatment:

Drug: Placebo

Lipoic acid plus omega-3 fatty acids

Experimental group

Description:

Three 1-gram fish oil concentrate capsules per day (2 caps morning, 1 cap evening) containing a daily dose of 675 mg docosahexaenoic acid (DHA) and 975 mg eicosapentaenoic acid (EPA) plus 2 LA capsules per day with a daily dose of 600 mg. Capsules will be taken with food or a meal.

Treatment:

Drug: Lipoic Acid plus Omega-3 Fatty Acids