Related Experiment Videos
Voltage-sensitive calcium channel development in epileptic DBA/2J mice suggests altered presynaptic function
M S Esplin1, J R Abbott, M L Smart
1Department of Pediatrics, University of Utah, Salt Lake City 84132.
Epilepsia
|September 1, 1994
Summary
Epileptic mice (DBA/2J) show altered development of N-type voltage-sensitive calcium channels (VSCC) compared to nonepileptic strains. This difference in synapse development may contribute to epilepsy.
Area of Science:
- Neuroscience
- Developmental Biology
- Epilepsy Research
Background:
- Aberrant synapse formation is linked to epilepsy.
- Omega-GVIA conotoxin can mark synapse formation.
Purpose of the Study:
- Investigate omega-GVIA binding in DBA/2J mice during development.
- Compare VSCC development in epileptic vs. nonepileptic mice.
Main Methods:
- Used synaptosomal preparations from different mouse strains.
- Assessed omega-GVIA binding at various developmental ages.
Main Results:
- DBA/2J mice exhibited a slower increase in omega-GVIA binding from postnatal days 2-8.
- Fewer omega-GVIA binding sites were observed in DBA/2J mice throughout development.
- Developmental patterns of N-type VSCC differed significantly between epileptic and nonepileptic mice.
Conclusions:
- DBA/2J mice display distinct brain VSCC development compared to nonepileptic strains.
- Altered presynaptic membrane development may influence synaptic activity and epileptogenesis.