Adolescent Alcohol and the Spectrum of Cognitive Dysfunction in Aging

Area of Science:

• Neuroscience
• Aging Research
• Toxicology

Background:

• Aging is associated with increased systemic and central nervous system (CNS) inflammation.
• Alcohol consumption patterns influence aging-related inflammation and cognitive trajectories.
• Neuroinflammation is a potential mediator linking alcohol exposure to cognitive decline in aging.

Purpose of the Study:

• To examine the role of neuroinflammation in alcohol's impact on cognitive aging.
• To explore the relationship between alcohol, inflammation, and cholinergic circuits.
• To review alcohol's effects on mild cognitive impairment (MCI), Wernicke-Korsakoff syndrome (WKS), and Alzheimer's disease and related dementias (ADRD).

Main Methods:

• Review of existing literature on aging, inflammation, alcohol, and cognitive function.
• Analysis of neuroinflammatory processes and their interaction with CNS pathways.
• Examination of alcohol-related thiamine deficiency and its impact on cholinergic function.

Main Results:

• Inflammation-mediated compromise of basal forebrain cholinergic function is implicated in alcohol-related cognitive dysfunction.
• Alcohol-related thiamine deficiency contributes to cholinergic dysfunction and Wernicke-Korsakoff syndrome (WKS).
• Alcohol's effects on Alzheimer's disease and related dementias (ADRD) neuropathology show a dichotomy based on biological sex and genetic factors.

Conclusions:

• Neuroinflammation is a critical link between alcohol exposure and cognitive aging.
• Pharmacological or behavioral interventions may rescue alcohol-induced cognitive deficits.
• Understanding sex and genetic differences is crucial for comprehending alcohol's impact on ADRD.