Obesity-Induced Brain Neuroinflammatory and Mitochondrial Changes

Area of Science:

• Neuroscience
• Metabolic Disorders
• Cellular Biology

Background:

• Obesity, characterized by excessive fat accumulation, is a significant risk factor for metabolic and neurodegenerative diseases, including cognitive deficits.
• The precise mechanisms linking obesity to neurodegeneration and cognitive decline remain incompletely understood.
• Obesity-induced chronic low-grade inflammation and mitochondrial dysfunction are implicated in both peripheral and central nervous system disorders.

Purpose of the Study:

• To review the impact of obesity and high-fat diets on neuroinflammation and mitochondrial alterations in the brain.
• To elucidate the role of these changes as a bridge between metabolic dysfunction and cognitive decline.

Main Methods:

• This review synthesizes findings from preclinical and clinical studies examining obesity, metabolic disorders, and brain health.
• It focuses on the interplay between adipose tissue changes, systemic inflammation, mitochondrial function, and neuronal integrity.

Main Results:

• Obesity leads to immune, metabolic, and functional changes in adipose tissue, promoting chronic inflammation.
• Mitochondrial dysfunction, linked to inflammation and oxidative stress, is evident in the brain during obesity and metabolic disorders.
• Impaired mitochondrial activity in high-energy-demand neurons contributes to neuronal damage, dysfunction, and neurotoxicity.

Conclusions:

• Obesity significantly impacts brain neuroinflammation and mitochondrial function.
• These neurobiological changes are key mediators linking metabolic dysfunction to cognitive decline.
• Targeting obesity-related inflammation and mitochondrial dysfunction may offer therapeutic strategies for preventing cognitive deficits.