High-fat diet alters the dopamine and opioid systems: effects across development

Area of Science:

• Neuroscience
• Nutritional Science
• Behavioral Science

Background:

• High-fat diet (HFD) consumption is primarily linked to metabolic and cardiovascular diseases.
• Emerging evidence suggests HFDs also adversely affect brain function and behavior.
• Specific neurotransmitter systems, including dopamine and opioid pathways, are vulnerable to HFD-induced dysregulation.

Purpose of the Study:

• To review recent findings on the adverse effects of HFD consumption on central reward circuitry.
• To examine the impact of HFDs on brain and behavior in both human and animal models.
• To discuss the influence of developmental windows on HFD-induced neurobiological changes.

Main Methods:

• Review of recent human and animal model studies.
• Analysis of research focusing on gene expression in the brain.
• Examination of studies investigating dopamine and opioid neurotransmitter systems.

Main Results:

• HFD consumption alters gene expression within the brain.
• Central reward circuitry is adversely affected by HFDs.
• Both prenatal/perinatal and adult chronic HFD exposure can lead to detrimental effects.

Conclusions:

• HFDs pose significant risks to brain health and behavior beyond metabolic concerns.
• The central reward system is a key target for HFD-induced neurobiological alterations.
• Understanding the impact of HFDs across different developmental stages is crucial for public health.