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Updated: Jul 8, 2025
Quantitative 3D In Silico Modeling q3DISM of Cerebral Amyloid-beta Phagocytosis in Rodent Models of Alzheimer's Disease
Published on: December 26, 2016
Interplay between microglia and environmental risk factors in Alzheimer's disease
Miaoping Zhang1, Chunmei Liang, Xiongjin Chen
1Guangdong Key Laboratory of Age-Related Cardiac and Cerebral Diseases, Affiliated Hospital of Guangdong Medical University, Zhanjiang, Guangdong Province, China.
Abstract:
Alzheimer's disease, among the most common neurodegenerative disorders, is characterized by progressive cognitive impairment. At present, the Alzheimer's disease main risk remains genetic risks, but major environmental factors are increasingly shown to impact Alzheimer's disease development and progression. Microglia, the most important brain immune cells, play a central role in Alzheimer's disease pathogenesis and are considered environmental and lifestyle "sensors." Factors like environmental pollution and modern lifestyles (e.g., chronic stress, poor dietary habits, sleep, and circadian rhythm disorders) can cause neuroinflammatory responses that lead to cognitive impairment via microglial functioning and phenotypic regulation. However, the specific mechanisms underlying interactions among these factors and microglia in Alzheimer's disease are unclear. Herein, we: discuss the biological effects of air pollution, chronic stress, gut microbiota, sleep patterns, physical exercise, cigarette smoking, and caffeine consumption on microglia; consider how unhealthy lifestyle factors influence individual susceptibility to Alzheimer's disease; and present the neuroprotective effects of a healthy lifestyle. Toward intervening and controlling these environmental risk factors at an early Alzheimer's disease stage, understanding the role of microglia in Alzheimer's disease development, and targeting strategies to target microglia, could be essential to future Alzheimer's disease treatments.
Insights
Environmental factors like pollution and lifestyle choices significantly impact Alzheimer's disease (AD) by affecting brain immune cells called microglia. Understanding these interactions is key for developing new AD treatments.
Area of Science:
- Neuroscience
- Immunology
- Environmental Health
Background:
- Alzheimer's disease (AD) is a leading neurodegenerative disorder causing cognitive decline.
- While genetics play a role, environmental factors increasingly influence AD development.
- Microglia, the brain's immune cells, are central to AD pathogenesis and respond to environmental/lifestyle cues.
Purpose of the Study:
- To explore the biological effects of various environmental and lifestyle factors on microglia in AD.
- To understand how these factors modulate individual susceptibility to Alzheimer's disease.
- To highlight the neuroprotective potential of a healthy lifestyle against AD.
Main Methods:
- Review of current literature on environmental factors and microglia in Alzheimer's disease.
- Discussion of the impact of air pollution, chronic stress, diet, sleep, exercise, smoking, and caffeine.
- Analysis of microglia's role in mediating the effects of these factors.
Main Results:
- Environmental pollution and unhealthy lifestyles trigger neuroinflammation via microglial dysregulation.
- Specific mechanisms linking lifestyle factors to microglial changes in AD require further elucidation.
- Healthy lifestyle choices demonstrate neuroprotective effects by modulating microglial function.
Conclusions:
- Microglia act as sensors for environmental and lifestyle risks in Alzheimer's disease.
- Targeting microglial pathways offers a promising therapeutic strategy for AD intervention.
- Understanding and controlling environmental risk factors is crucial for future AD treatments.
