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Effects of Metabolic Dysfunction-Associated Steatohepatitis in Alertness, Associative Learning, and Astrocyte Density
Sara G Higarza1, Marina De Antón-Cosío2, Candela Zorzo1,2,3
1INEUROPA, Instituto de Neurociencias del Principado de Asturias, Oviedo, Spain.
Brain and Behavior
|December 31, 2024
Summary
Metabolic dysfunction-associated steatohepatitis (MASH) in male rats showed mild cognitive deficits, including altered startle responses and reduced exploration, despite intact associative learning. This suggests MASH impacts brain function, warranting further investigation into its mechanisms.
Area of Science:
- Neuroscience
- Metabolic Disorders
- Animal Models
Background:
- Metabolic dysfunction-associated steatohepatitis (MASH) is a liver condition linked to diet, causing systemic issues.
- Understanding MASH's neurological impact is crucial for public health.
Purpose of the Study:
- To investigate the psychobiological effects of MASH in adult male rats.
- To explore cognitive function and brain changes associated with MASH.
Main Methods:
- Rats were fed a high-fat, high-cholesterol diet for 14 weeks to induce MASH.
- Cognitive functions including associative learning and acoustic startle response were assessed.
- Astrocyte density in the prefrontal cortex and hippocampus was analyzed.
Main Results:
- MASH rats exhibited normal associative learning but showed reduced exploration rates.
- A mild deficit in prepulse inhibition, indicating altered startle response and alertness, was observed.
- No significant differences in astrocyte density were found between MASH and control groups.
Conclusions:
- MASH is associated with cognitive dysfunction, specifically affecting sensory gating and exploratory behavior.
- Further research is required to understand the mechanisms and human health implications of MASH-induced cognitive changes.
