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Statin therapy in the treatment of Alzheimer disease: what is the rationale?

Abstract
Alzheimer disease (AD) is a chronic neurodegenerative disorder that is manifested by cognitive decline, neuropsychiatric symptoms, and diffuse structural abnormalities in the brain. Its prevalence is predicted to rise 4-fold in the next 50 years. AD is characterized pathologically by deposition of extracellular beta-amyloid and accumulation of neurofibrillary tangles. Neuronal death and specific neurotransmitter deficits also are part of the pathologic picture. Strategies to delay symptom progression have focused on addressing the neurotransmitter deficits. Strategies to delay the onset or biologic progression of AD largely have targeted the plaques formed by the deposition of beta-amyloid. AD and cardiovascular disease share common risk factors, notably hypercholesterolemia, and occur together more often than expected by chance. Therapy with the 3-hydroxy-3-methylglutaryl coenzyme A (HMG-CoA) reductase inhibitors (statins) is the first-line treatment option for hypercholesterolemia, and observational studies have suggested that the risk of AD is reduced in patients who receive statin therapy in midlife. This reduction in risk of AD observed with statin therapy may be due to statins reducing beta-amyloid formation and deposition or to their known anti-inflammatory effects. Two randomized double-blind statin trials in patients with AD to assess the potential for statins to slow disease progression are currently under way. If successful, statin AD primary prevention trials may be developed.
AuthorsSteven T DeKosky
JournalThe American journal of medicine (Am J Med) Vol. 118 Suppl 12A Pg. 48-53 (Dec 2005) ISSN: 1555-7162 [Electronic] United States
PMID16356808 (Publication Type: Journal Article)
Chemical References
  • Hydroxymethylglutaryl-CoA Reductase Inhibitors
Topics
  • Alzheimer Disease (drug therapy, pathology, prevention & control)
  • Humans
  • Hydroxymethylglutaryl-CoA Reductase Inhibitors (therapeutic use)
  • Hypercholesterolemia (drug therapy, pathology)
  • Neurofibrillary Tangles (pathology)

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