Cited by 136Down syndrome and intellectual disability researchDementia and Cognitive Impairment ResearchAlzheimer's disease research and treatments

Down syndrome and dementia: A randomized, controlled trial of antioxidant supplementation

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Lott, Ira T., Doran, Eric, Nguyen, Vinh Q., Tournay, Anne, Head, Elizabeth, Gillen, Daniel L.·2011·American Journal of Medical Genetics Part A

Abstract

Individuals with Down syndrome over age 40 years are at risk for developing dementia of the Alzheimer type and have evidence for chronic oxidative stress. There is a paucity of treatment trials for dementia in Down syndrome in comparison to Alzheimer disease in the general (non‐Down syndrome) population. This 2‐year randomized, double‐blind, placebo‐controlled trial assessed whether daily oral antioxidant supplementation (900 IU of alpha‐tocopherol, 200 mg of ascorbic acid and 600 mg of alpha‐lipoic acid) was effective, safe and tolerable for 53 individuals with Down syndrome and dementia. The outcome measures comprised a battery of neuropsychological assessments administered at baseline and every 6 months. Compared to the placebo group, those individuals receiving the antioxidant supplement showed neither an improvement in cognitive functioning nor a stabilization of cognitive decline. Mean plasma levels of alpha‐tocopherol increased ∼2‐fold in the treatment group and were consistently higher than the placebo group over the treatment period. Pill counts indicated good compliance with the regimen. No serious adverse events attributed to the treatment were noted. We conclude that antioxidant supplementation is safe, though ineffective as a treatment for dementia in individuals with Down syndrome and Alzheimer type dementia. Our findings are similar to studies of antioxidant supplementation in Alzheimer disease in the general population. The feasibility of carrying out a clinical trial for dementia in Down syndrome is demonstrated. © 2011 Wiley‐Liss, Inc.

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  • In one trial lasting 2 years, antioxidant supplementation with vitamin C, vitamin E, and α-lipoic acid in subjects with Down syndrome did not prevent cognitive decline nor improved cognitive function.

    “In one of the trials lasting 2 years, antioxidant supplementation with vitamin C, vitamin E, and α-lipoic acid in subjects with Down syndrome did not prevent cognitive decline nor improved cognitive function (Lott et al. 2011).”

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Authors
Lott, I. T., Doran, E., Nguyen, V. Q., Tournay, A., Head, E., & Gillen, D. L.
Affiliations
  • University of California, Irvine (US)
  • University of Kentucky (US)
Corresponding author
Lott, Ira T.
Venue
American Journal of Medical Genetics Part A
Publisher
Wiley
Published
2011-07-07
Volume
155
Issue
8
Pages
1939-1948
ISSN
  • 1552-4825 (ISSN-L)
  • 1552-4833
OpenAlex
W2027752708
Cited by
136
References
85
Citations by year
2026: 2 · 2025: 3 · 2024: 2 · 2023: 7 · 2022: 14 · 2021: 7 · 2020: 7 · 2019: 7 · 2018: 10 · 2017: 8 · 2016: 12 · 2015: 12 · 2014: 15 · 2013: 5 · 2012: 22
FWCI
14.15
Type
journal article
Language
en
Open access
Locations
  • American Journal of Medical Genetics Part A (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • University of California, Irvine
  • National Institute on Aging (AG 21912, AG 16573, P50AG016573, R01AG021912, P50-AG-21912)
  • National Center for Research Resources (UL1RR031985)
  • Eunice Kennedy Shriver National Institute of Child Health and Human Development (R01HD065160)
Topics
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Down syndrome and intellectual disability research
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
Keywords
Down syndrome, dementia, Alzheimer-type dementia, antioxidant supplementation, alpha-tocopherol, vitamin C, alpha-lipoic acid, oxidative stress, cognitive decline, plasma vitamin E, treatment efficacy, trial feasibility
MeSH terms
Alzheimer Disease, Antioxidants, Ascorbic Acid, Down Syndrome, Drug Combinations, Feasibility Studies, Female, Humans, Thioctic Acid, Male, Middle Aged, Pilot Projects, Treatment Outcome, alpha-Tocopherol

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