Sweet Relief? Short-Term Post-Traumatic High-Sucrose Intake Attenuates Acute but Not Long-Term Fear Responses in Mice

Area of Science:

• Neuroscience
• Behavioral Science
• Endocrinology

Background:

• Energy imbalance is linked to neuropsychiatric disorders, including post-traumatic stress disorder (PTSD).
• Sweet food consumption is a common coping mechanism during stress.
• The long-term effects of sucrose intake on stress-related behaviors are not well understood.

Purpose of the Study:

• To investigate the impact of sucrose consumption on conditioned fear responses in a mouse model of PTSD.
• To explore the influence of sucrose concentration, timing, and duration of intake.
• To assess potential sex differences in sucrose's therapeutic effects.

Main Methods:

• Mice were subjected to foot shock trauma to induce fear.
• Freezing behavior was measured 24 hours (acute stress disorder model) and 14 days (PTSD model) post-trauma.
• Sucrose solutions of varying concentrations were administered for different durations immediately after trauma or before remote memory testing.

Main Results:

• Trauma significantly increased freezing behavior.
• 24-hour administration of 16% and 32% sucrose immediately after trauma reduced freezing the next day, but not 2% sucrose or shorter durations.
• Sucrose intervention did not affect freezing 14 days later or show curative effects on remote fear memory.

Conclusions:

• Immediate post-trauma sucrose consumption may alleviate acute stress responses but does not prevent the development of PTSD-like symptoms.
• This suggests that while energy intake can modulate immediate stress reactions, it may not alter the long-term trajectory of PTSD.
• Findings offer insights into energy regulation's role in neuropsychiatric disorders.