How Can Early Stress Influence Later Alzheimer's Disease Risk? Possible Mediators and Underlying Mechanisms

Area of Science:

• Neuroscience
• Genetics
• Environmental Health

Background:

• Alzheimer's disease (AD) is a progressive neurodegenerative disorder.
• Both genetic and environmental factors influence AD onset and progression.
• Growing evidence links lifestyle factors like stress, exercise, and nutrition to AD risk.

Purpose of the Study:

• To review preclinical findings on how early-life stress impacts AD risk.
• To explore biological mechanisms underlying stress effects on brain health.
• To identify potential targets for preventing or treating AD.

Main Methods:

• Review of preclinical research on early-life stress and AD.
• Focus on molecular and cellular substrates affected by stress.
• Discussion of neurobiological pathways including stress hormones, neural networks, and neuroinflammation.

Main Results:

• Early-life stress can alter key brain processes like metabolism, neurogenesis, and synaptic function.
• These alterations may reduce the brain's ability to cope with AD pathology, such as amyloid-beta accumulation.
• Stress-induced changes can accelerate cognitive decline and AD progression in model systems.

Conclusions:

• Early-life stress can establish a biological vulnerability to Alzheimer's disease.
• Understanding these mechanisms is crucial for developing novel preventive and therapeutic strategies.
• Interventions targeting stress resilience may help mitigate AD risk and progression.