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Dementia is a collective term for cognitive disorders primarily affecting memory, thinking, and reasoning. It is not a specific disease but a syndrome, with Alzheimer's disease being the most common cause, accounting for approximately 60-80% of cases. Other types include vascular dementia, Lewy body dementia, and frontotemporal dementia. Dementia affects millions worldwide, particularly older adults, though it is not a normal part of aging.
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Using Retinal Imaging to Study Dementia
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Aging, lifestyle and dementia.

Devin Wahl1, Samantha M Solon-Biet1, Victoria C Cogger1

  • 1Charles Perkins Centre, University of Sydney, Sydney 2006, Australia; Aging and Alzheimers Institute, ANZAC Research Institute, Concord Clinical School/Sydney Medical School, Concord 2139, Australia.

Neurobiology of Disease
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Aging increases disease risk, but improving metabolic health may protect the brain. Lifestyle interventions and certain drugs show promise for enhancing brain health during aging.

Keywords:
AgingAlzheimer's diseaseCalorie restrictionDementiaMetabolic health

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Area of Science:

  • Gerontology and Neuroscience
  • Metabolic Health and Aging
  • Neurodegenerative Disease Prevention

Background:

  • Aging is the primary risk factor for major diseases like cancer, cardiovascular disorders, and neurodegenerative conditions.
  • Emerging evidence suggests interventions enhancing metabolic health in aging may also benefit brain health.
  • Non-pharmacological interventions like caloric restriction, exercise, and environmental enrichment are robust methods.

Purpose of the Study:

  • To explore the link between metabolic health interventions and brain health during aging.
  • To review evidence for dietary patterns and pharmacological agents in mitigating age-related cognitive decline.
  • To highlight the growing recognition of metabolic function's role in optimizing brain health.

Main Methods:

  • Review of human dietary patterns (Mediterranean, FINGER, Okinawan) associated with better age-related health.
  • Examination of non-pharmacological interventions: caloric/protein restriction, aerobic exercise, environmental enrichment.
  • Analysis of pharmacological agents (rapamycin, metformin, resveratrol) targeting nutrient-sensing pathways.

Main Results:

  • Specific diets are linked to improved age-related health and reduced dementia risk.
  • Nutrient-sensing pathway modulators show potential for cardiometabolic and age-associated disease risk reduction.
  • Rodent studies suggest some agents may reduce dementia risk.

Conclusions:

  • Improving metabolic function is increasingly recognized as key to optimizing brain health in aging.
  • Dietary and lifestyle interventions show significant promise for cognitive health.
  • Pharmacological approaches targeting metabolic pathways warrant further investigation for dementia prevention.