Brain-derived neurotrophic factor levels in morphine-addicted rodents under different exercise protocols: a...

Area of Science:

• Neuroscience
• Addiction Research
• Exercise Physiology

Background:

• Morphine addiction causes behavioral and molecular changes.
• Exercise may reverse these effects, but evidence is inconsistent.
• Brain-derived neurotrophic factor (BDNF) is implicated in exercise's impact on addiction.

Purpose of the Study:

• To systematically review and meta-analyze animal studies.
• To determine the role of BDNF in exercise's effects on morphine addiction.

Main Methods:

• Searched databases and references up to May 25, 2024.
• Assessed risk of bias using SYRCLE tools.
• Conducted meta-analysis, subgroup, and sensitivity analyses.

Main Results:

• Exercise increased BDNF in morphine-addicted male animals.
• Voluntary exercise, but not forced, affected BDNF in males.
• Exercise type influenced BDNF; intensity did not.

Conclusions:

• Exercise elevates BDNF in male, but not female, animals with morphine addiction.
• BDNF levels correlate with exercise type, not intensity.
• BDNF may be a biomarker for exercise modality effectiveness in addiction treatment.