High-fructose diet during adolescent development increases neuroinflammation and depressive-like behavior without...

Area of Science:

• Neuroscience
• Metabolic Disorders
• Inflammation Research

Background:

• Aging-related diseases are often studied in healthy models, ignoring human co-morbidities.
• Dietary factors, like high fructose intake, can impact neural function, behavior, and stress responses.
• Fructose consumption may prime the brain for exacerbated inflammatory responses to challenges like stroke.

Purpose of the Study:

• To investigate the neuroinflammatory effects of a high-fructose diet during adolescence.
• To determine how diet-induced metabolic dysfunction influences outcomes after stroke (middle cerebral artery occlusion).
• To assess if a high-fructose diet exacerbates stroke-related neuropathology and behavioral deficits.

Main Methods:

• Adolescent rodents were fed a high-fructose diet.
• Neuroinflammation markers (brain complement expression, plasma TNFα, serum corticosterone) were measured.
• Behavioral tests assessed depressive-like behavior.
• Neuropathological outcomes and lesion volume were evaluated after inducing stroke via middle cerebral artery occlusion.

Main Results:

• High-fructose diet consumption increased brain complement expression.
• Elevated plasma tumor necrosis factor-alpha (TNFα) and serum corticosterone were observed.
• Adolescent high-fructose diet intake promoted depressive-like behaviors.
• Despite pre-existing inflammation and behavioral changes, fructose did not worsen neurological deficits or lesion size post-stroke.

Conclusions:

• Peri-adolescent high-fructose diet consumption induces neuroinflammation and depressive-like behaviors.
• Metabolic dysfunction from fructose does not exacerbate acute stroke outcomes in this model.
• Dietary interventions during development may be crucial for mitigating neuroinflammation and behavioral changes.