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Updated: Jun 28, 2026
Sub-acute Cerebral Microhemorrhages Induced by Lipopolysaccharide Injection in Rats
Published on: October 17, 2018
Macelignan attenuates LPS-induced inflammation and reduces LPS-induced spatial learning impairments in rats
Chun-Ai Cui1, Da-Qing Jin, Yoo Kyeong Hwang
1Department of Anatomy, Yanbian University School of Basic Medical Science, Yanbian 133-000, China.
Abstract:
Previous studies have shown that macelignan has anti-inflammatory and neuroprotective effects. Subsequently, in the current study, we demonstrate that oral administrations of macelignan reduce the hippocampal microglial activation induced by chronic infusions of lipopolysaccharide (LPS) into the fourth ventricle of Fisher-344 rat brains. A Morris water maze was used to evaluate the status of the hippocampal-dependent spatial learning in control rats with an artificial cerebrospinal fluid infusion, rats with chronic LPS infusions, and rats with chronic LPS infusions and oral administrations of macelignan. The rats with chronic LPS infusions showed spatial memory impairments relative to the control rats in the performance of the memory task. Daily administration of macelignan reduced the spatial memory impairments induced by the chronic LPS infusions. The results indicate that macelignan may possess therapeutic potential for the prevention of Alzheimer's disease.
Insights
Macelignan, an anti-inflammatory compound, was found to reduce brain inflammation and spatial memory loss in rats. These findings suggest macelignan may help prevent Alzheimer's disease.
Area of Science:
- Neuroscience
- Pharmacology
Background:
- Macelignan exhibits known anti-inflammatory and neuroprotective properties.
- Microglial activation in the brain is linked to neurodegenerative diseases.
Purpose of the Study:
- To investigate the effects of macelignan on lipopolysaccharide (LPS)-induced hippocampal microglial activation and spatial memory impairment in rats.
- To assess the therapeutic potential of macelignan for Alzheimer's disease prevention.
Main Methods:
- Rats received chronic infusions of LPS into the brain's fourth ventricle.
- Spatial learning and memory were evaluated using the Morris water maze task.
- Macelignan was administered orally to assess its impact on LPS-induced effects.
Main Results:
- LPS infusion led to significant spatial memory impairments in rats compared to controls.
- Oral administration of macelignan notably reduced these LPS-induced spatial memory deficits.
- Macelignan treatment decreased hippocampal microglial activation.
Conclusions:
- Macelignan effectively mitigates neuroinflammation and spatial memory impairment caused by LPS.
- Macelignan demonstrates promising therapeutic potential for preventing Alzheimer's disease.
