Effect of methylprednisolone on experimental brain edema in magnetic resonance imaging
P Kozler1, V Herynek, D Marešová
1Institute of Physiology, First Faculty of Medicine, Charles University, Prague, Czech Republic. jaroslav.pokorny@lf1.cuni.cz.
Abstract:
Magnetic resonance imaging has been used for evaluating of a brain edema in experimental animals to assess cytotoxic and vasogenic edema by the apparent diffusion coefficient (ADC) and T2 imaging. This paper brings information about the effectiveness of methylprednisolone (MP) on experimental brain edema. A total of 24 rats were divided into three groups of 8 animals each. Rats with cytotoxic/intracellular brain edema induced by water intoxication were assigned to the group WI. These rats also served as the additional control group CG when measured before the induction of edema. A third group (WIMP) was intraperitoneally administered with methylprednisolone 100 mg/kg during water intoxication treatment. The group WI+MP was injected with methylprednisolone 50 mg/kg into the carotid artery within two hours after the water intoxication treatment. We evaluated the results in four groups. Two control groups (CG, WI) and two experimental groups (WIMP, WI+MP). Rats were subjected to MR scanning 24 h after edema induction. We observed significantly increased ADC values in group WI in both evaluated areas - cortex and hippocampus, which proved the occurrence of experimental vasogenic edema, while ADC values in groups WIMP and WI+MP were not increased, indicating that the experimental edema was not developed and thus confirming the protective effect of MP.
Insights
Methylprednisolone (MP) effectively protected against experimental brain edema in rats. Magnetic resonance imaging showed MP prevented increased apparent diffusion coefficient (ADC) values, indicating reduced edema.
Area of Science:
- Neuroscience
- Radiology
- Pharmacology
Background:
- Brain edema is a critical condition.
- Magnetic resonance imaging (MRI) with apparent diffusion coefficient (ADC) and T2 imaging aids in evaluating brain edema.
- Methylprednisolone (MP) is a corticosteroid with potential anti-edema effects.
Purpose of the Study:
- To investigate the protective efficacy of methylprednisolone (MP) against experimental brain edema.
- To assess the impact of MP on cytotoxic and vasogenic edema using MRI.
- To compare different administration routes and dosages of MP.
Main Methods:
- Induction of cytotoxic/intracellular brain edema in rats via water intoxication.
- Administration of methylprednisolone (MP) intraperitoneally (100 mg/kg) or intra-arterially (50 mg/kg).
- Evaluation of brain edema using magnetic resonance imaging (MRI) and apparent diffusion coefficient (ADC) values 24 hours post-induction.
Main Results:
- Significantly increased ADC values were observed in the cortex and hippocampus of rats with induced edema (group WI), confirming vasogenic edema.
- ADC values in rats treated with methylprednisolone (groups WIMP and WI+MP) did not increase.
- These findings indicate that MP administration prevented the development of experimental edema.
Conclusions:
- Methylprednisolone (MP) demonstrates a significant protective effect against experimental brain edema.
- MP administration, via both intraperitoneal and intra-arterial routes, effectively mitigated edema formation.
- MRI assessment of ADC values is a reliable method for evaluating the efficacy of therapeutic interventions for brain edema.
