Changes in spatial memory and BDNF expression to simultaneous dietary restriction and forced exercise

Area of Science:

• Neuroscience
• Exercise Physiology
• Nutritional Neuroscience

Background:

• Diet and exercise are known to influence learning and memory.
• Brain-derived neurotrophic factor (BDNF) plays a crucial role in cognitive functions.
• Understanding the interplay between exercise and dietary interventions on cognition is important.

Purpose of the Study:

• To investigate the combined effects of forced swimming exercise (FSE) and every other day fasting (EODF) on spatial memory.
• To assess the impact of FSE and EODF on hippocampal brain-derived neurotrophic factor (BDNF) levels.
• To determine if EODF modulates the effects of FSE on cognitive function.

Main Methods:

• Wistar male rats were subjected to FSE and/or EODF for 6 weeks.
• Spatial memory was evaluated using the radial arm water maze (RAWM) paradigm.
• Hippocampal BDNF protein levels were measured using ELISA assays.

Main Results:

• FSE significantly improved learning, short-term memory, and long-term memory formation.
• FSE led to a significant increase in hippocampal BDNF protein levels (p<0.05).
• EODF alone had no significant effect on spatial learning, memory, or hippocampal BDNF levels (p>0.05).
• EODF did not alter the beneficial effects of FSE on cognitive function (p>0.05).

Conclusions:

• Forced swimming exercise enhances spatial learning and memory formation in rats.
• Exercise increases hippocampal BDNF levels, a key factor in cognitive enhancement.
• Every other day fasting does not appear to affect spatial learning, memory, or BDNF levels in this model.
• Dietary interventions like EODF may not synergize with exercise to improve cognitive function.