Related Experiment Video
Updated: May 7, 2026
Pentylenetetrazole-Induced Kindling Mouse Model
Published on: June 12, 2018
Alpha melanocyte stimulating hormone (α-MSH) does not modify pentylenetetrazol- and pilocarpine-induced seizures
Fernanda Rossatto Temp1, Aline Carré Santos, Joseane Righes Marafiga
1Graduate Program in Pharmacology, Center of Health Sciences, Universidade Federal de Santa Maria, Santa Maria, RS 97105-900, Brazil.
Aims:
Alpha-melanocyte stimulating hormone (α-MSH) is a pro-opiomelanocortin (POMC)-derived peptide involved in different neurological functions that also exerts anti-inflammatory effects, including in the central nervous system (CNS). Although inflammation has been implicated in seizures and epilepsy, no study has systematically investigated whether α-MSH modifies seizures. Therefore, in the current study we determined whether α-MSH alters pentylenetetrazol (PTZ)- and pilocarpine-induced seizures.
Main Methods:
Adult male Swiss mice were injected with α-MSH (1.66, 5 or 15 μg/3 μL, intracerebroventricular (i.c.v.)) or systemic (0.1, 0.3 or 1 mg/kg, intraperitoneally (i.p.)). Five to sixty minutes after the injection of the peptide, animals were injected with PTZ (60 mg/kg, i.p.) or pilocarpine (370 mg/kg, i.p.). Latency to myoclonic jerks and tonic-clonic seizures, number of seizure episodes, total time spent seizing and seizure intensity, assessed by the Racine and Meurs scales were recorded. Interleukin 1 beta (IL-1β) levels in the hippocampus were measured by a commercial enzyme-linked immunoabsorbent assay (ELISA).
Key Findings:
Neither intracerebroventricular (1.66, 5 or 15 μg/3 μL, i.c.v.) nor systemic (0.1, 0.3 or 1 mg/kg, i.p.) administration of α-MSH altered PTZ- and pilocarpine-induced seizures. IL-1β levels in the hippocampi were not altered by α-MSH, PTZ or pilocarpine.
Significance:
Although inflammation has been implicated in seizures and epilepsy and α-MSH is a potent anti-inflammatory peptide, our results do not support a role for α-MSH in seizure control.
Insights
Alpha-melanocyte stimulating hormone (α-MSH) did not alter seizures induced by pentylenetetrazol or pilocarpine in mice. This study found no evidence that α-MSH plays a role in controlling seizures, despite its anti-inflammatory properties.
Area of Science:
- Neuroscience
- Neuroinflammation
- Epilepsy Research
Background:
- Alpha-melanocyte stimulating hormone (α-MSH) is a peptide with known anti-inflammatory effects in the central nervous system (CNS).
- Inflammation is increasingly recognized as a factor in the development and progression of seizures and epilepsy.
- The specific role of α-MSH in seizure modulation remained uninvestigated.
Purpose of the Study:
- To investigate the potential effect of α-MSH on seizure activity.
- To determine if α-MSH administration alters the severity or onset of chemically induced seizures.
Main Methods:
- Adult male Swiss mice received intracerebroventricular or systemic administration of α-MSH.
- Seizures were induced using pentylenetetrazol (PTZ) or pilocarpine.
- Seizure parameters (latency, intensity, duration) and hippocampal interleukin-1 beta (IL-1β) levels were assessed.
Main Results:
- Neither intracerebroventricular nor systemic α-MSH administration affected PTZ- or pilocarpine-induced seizures.
- α-MSH did not alter hippocampal IL-1β levels in response to seizures or independently.
- No significant changes in seizure latency, intensity, or duration were observed with α-MSH treatment.
Conclusions:
- The findings do not support a role for α-MSH in the control of seizures.
- Despite its anti-inflammatory properties, α-MSH does not appear to modulate seizure susceptibility or severity in this model.
- Further research may be needed to explore other neuroprotective or neuromodulatory roles of α-MSH.
