Acute exercise modulates BDNF and pro-BDNF protein content in immune cells

Area of Science:

• Neuroscience
• Immunology
• Exercise Physiology

Background:

• In vitro studies indicate immune cells produce neurotrophins under stress.
• In vivo evidence linking physiological stress, like exercise, to neurotrophin levels in peripheral blood mononuclear cells (PBMCs) is lacking.

Purpose of the Study:

• To investigate if acute exercise modulates brain-derived neurotrophic factor (BDNF) and related proteins in PBMCs.
• To compare the effects of maximal intensity (MAX) and individual anaerobic threshold (IAT) exercise on BDNF expression.

Main Methods:

• Healthy young men underwent MAX or IAT cycling tests.
• PBMC expression of BDNF, pro-BDNF, and p75(NTR) was analyzed.
• Circulating factors including BDNF, growth factors, and cytokines were measured.

Main Results:

• Both exercise types altered BDNF isoforms in PBMCs.
• Pro-BDNF increased post-exercise in both MAX and IAT.
• BDNF kinetics differed: MAX showed a transient increase, while IAT demonstrated sustained elevation during recovery.

Conclusions:

• PBMCs can produce and secrete BDNF isoforms in response to acute exercise.
• Exercise modulates p75(NTR) and stress-related proteins in PBMCs.
• Findings suggest bidirectional communication between nervous and immune systems during physiological stress.