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Safety Study of Nicotinamide to Treat Alzheimer's Disease

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ClinicalTrials.gov Identifier: NCT00580931
Recruitment Status : Completed
First Posted : December 27, 2007
Last Update Posted : January 25, 2017
Alzheimer's Association
Information provided by (Responsible Party):
Steven Schreiber, University of California, Irvine

Brief Summary:
The purpose of this study is to determine whether nicotinamide, or vitamin B3, is safe and effective in the treatment of Alzheimer's disease.

Condition or disease Intervention/treatment Phase
Alzheimer's Disease Drug: Nicotinamide Drug: Enduramide placebo Phase 1 Phase 2

Detailed Description:
The goal of this proposal is to show that, nicotinamide (NA), a B3 vitamin, is safe and effective for the treatment of patients with mild to moderate Alzheimer's disease (AD). NA is known to block the ability of certain proteins to regulate other proteins by removing their acetyl groups. Recent evidence has demonstrated that inhibitors such as NA prevent nerve cell degeneration in models of Huntington's disease (HD), Parkinson's disease and Lou Gehrig's disease (or ALS). Despite these beneficial effects in many different animal models, there have been no studies to date using these inhibitors in AD. In some of our recent studies we found that the potent inhibitor, NA, significantly improves learning and memory in transgenic mice that develop AD. NA treatment also resulted in striking changes in tau, a protein that abnormally accumulates in AD. NA has been extensively used in clinical studies over the last 40 years and is generally safe and well-tolerated. As NA is a safe and readily available vitamin supplement, our recent results provide a strong argument for a study of NA in patients with AD. We therefore propose to treat 50 patients with mild to moderate AD with either NA (1500 milligrams twice a day) or an identical but inactive drug (placebo) for 24 weeks. At 6 week intervals we will assess functions such as learning and memory, and ability to carry out daily activities as well as caregiver reports using standardized tests. We will also perform spinal taps at the beginning and end of the study to measure the level of abnormal tau protein in the cerebrospinal fluid. Blood tests will periodically be done to assess liver function and complete blood counts. The results of this study may provide the basis for a more extensive study of NA for the treatment of mild to moderate AD.

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 50 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: Efficacy of Nicotinamide for the Treatment of Alzheimer's Disease
Actual Study Start Date : January 2008
Actual Primary Completion Date : July 2014
Actual Study Completion Date : July 2014

Arm Intervention/treatment
Experimental: 1
Subjects will receive experimental drug in a blinded fashion.
Drug: Nicotinamide
1500 mg twice a day for 6 months
Other Name: Enduramide

Placebo Comparator: 2
Identical in size, shape and color to experimental drug.
Drug: Enduramide placebo
1 tab twice a day

Primary Outcome Measures :
  1. Alzheimer's Disease Assessment Scale-Cognitive Subscale [ Time Frame: Baseline, 6 wk, 12 wk, 18 wk, 24 wk ]

Information from the National Library of Medicine

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Ages Eligible for Study:   50 Years to 95 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Diagnosis of probable AD according to DSM-IV criteria
  • Mild to moderate dementia based on Mini-Mental State Examination [MMSE] score between 13-25
  • Minimum age 50 years
  • Brain imaging (computed tomographic scan or magnetic resonance image) within 12 months consistent with a diagnosis of probable AD
  • Hachinski Ischemic Score of <4.
  • Stable doses of concomitant medications, including cholinesterase inhibitors (ChEIs) and/or memantine.

Exclusion Criteria:

  • Dementia due to another cause
  • Other neurological or psychiatric diseases
  • Pseudodementia
  • Unstable medical condition
  • Initial treatment within 30 days of screening with a ChEI, memantine or any investigational drug
  • History of alcoholism, drug abuse, liver disease, peptic ulcer disease
  • Pregnancy, or the potential to become pregnant.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00580931

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United States, California
UC Irvine School of Medicine
Irvine, California, United States, 92697
Sponsors and Collaborators
University of California, Irvine
Alzheimer's Association
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Principal Investigator: Steven S Schreiber, MD Regents of the University of California
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Responsible Party: Steven Schreiber, Professor of Neurology, University of California, Irvine
ClinicalTrials.gov Identifier: NCT00580931    
Other Study ID Numbers: IIRG-07-61197
First Posted: December 27, 2007    Key Record Dates
Last Update Posted: January 25, 2017
Last Verified: January 2017
Keywords provided by Steven Schreiber, University of California, Irvine:
nutraceutical, dementia, cognition, HDAC inhibitor
Additional relevant MeSH terms:
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Alzheimer Disease
Brain Diseases
Central Nervous System Diseases
Nervous System Diseases
Neurodegenerative Diseases
Neurocognitive Disorders
Mental Disorders
Nicotinic Acids
Vitamin B Complex
Physiological Effects of Drugs
Hypolipidemic Agents
Molecular Mechanisms of Pharmacological Action
Lipid Regulating Agents
Vasodilator Agents