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

This study has been completed.
Information provided by (Responsible Party):
Lynne Shinto, Oregon Health and Science University Identifier:
First received: January 29, 2013
Last updated: February 22, 2017
Last verified: February 2017
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.

Condition Intervention Phase
Treated Hypertension
Drug: Lipoic Acid plus Omega-3 Fatty Acids
Drug: Placebo
Phase 1
Phase 2

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Participant, Investigator, Outcomes Assessor
Primary Purpose: Prevention
Official Title: Pilot Study: Lipoic Acid and Omega-3 Fatty Acid for Alzheimer's Disease Prevention

Resource links provided by NLM:

Further study details as provided by Oregon Health and Science University:

Primary Outcome Measures:
  • Trails Making Test Part B (Executive Function) [ Time Frame: Baseline, 6 months, and 12 months ]
    The trail Making Test consist of 25 circles distributed over a sheet of paper. In Part A, the circles are numbered 1 - 25, and the patient should draw lines to connect the numbers in ascending order. In Part B, the circles include both numbers (1 - 13) and letters (A - L); as in Part A, the patient draws lines to connect the circles in an ascending pattern, but with the added task of alternating between the numbers and letters (i.e., 1-A-2-B-3-C, etc.). The patient should be instructed to connect the circles as quickly as possible, without lifting the pen or pencil from the paper. Time the patient as he or she connects the "trail." If the patient makes an error, point it out immediately and allow the patient to correct it. Results for part B are reported as the number of seconds required to complete the task; therefore, higher scores reveal greater impairment.

Secondary Outcome Measures:
  • White Matter Hyperintensity Volume (Brain MRI) [ Time Frame: Baseline and 12 months ]

Enrollment: 42
Study Start Date: April 2013
Study Completion Date: October 2015
Primary Completion Date: October 2015 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Placebo Comparator: Placebo
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.
Drug: Placebo
placebo capsules
Experimental: Lipoic acid plus omega-3 fatty acids
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.
Drug: Lipoic Acid plus Omega-3 Fatty Acids
alpha lipoic acid (racemic) and fish oil concentrate
Other Names:
  • alpha lipoic acid
  • thioctic acid
  • fish oil concentrate
  • fish oil

Detailed 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.

Ages Eligible for Study:   55 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

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
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Please refer to this study by its identifier: NCT01780974

United States, Oregon
Lynne Shinto, ND, MPH
Portland, Oregon, United States, 97239
Oregon Health & Science University
Portland, Oregon, United States, 97239
Sponsors and Collaborators
Oregon Health and Science University
Principal Investigator: Lynne Shinto, ND, MPH Oregon Health and Science University
  More Information

Responsible Party: Lynne Shinto, Associate Professor, Department of Neurology, Oregon Health and Science University Identifier: NCT01780974     History of Changes
Other Study ID Numbers: SFF01
Study First Received: January 29, 2013
Results First Received: December 20, 2016
Last Updated: February 22, 2017
Individual Participant Data  
Plan to Share IPD: Undecided

Keywords provided by Oregon Health and Science University:
Vascular Risk
Alzheimer's Risk
fish oil
Lipoic acid

Additional relevant MeSH terms:
Vascular Diseases
Cardiovascular Diseases
Thioctic Acid
Molecular Mechanisms of Pharmacological Action
Protective Agents
Physiological Effects of Drugs
Vitamin B Complex
Growth Substances processed this record on April 24, 2017