Mechanisms of Action
Start with the big picture
The lesson maps major antiseizure drug mechanisms to their molecular targets. It distinguishes fast from slow sodium-channel inactivation, then covers thalamic T-type calcium-channel blockade and binding to the high-voltage calcium-channel α₂δ subunit. It also introduces SV2A modulation and glutamate receptor antagonism at AMPA and NMDA receptors. GABA-related mechanisms include potentiation of GABA_A channels, inhibition of GABA transaminase, blockade of GAT-1 reuptake, and stimulation of GABA synthesis. Potassium-channel opening and carbonic anhydrase inhibition round out the overview. Drug examples are linked to these mechanisms, including the relationship between T-type calcium channels and absence seizure control.
What you'll learn
- Differentiate fast and slow sodium-channel inactivation mechanisms.
- Explain how T-type calcium-channel blockade relates to absence seizure control.
- Identify mechanisms involving α₂δ binding, SV2A, and glutamate receptors.
- Compare the listed mechanisms that enhance GABAergic signaling.
- Describe the roles of potassium-channel opening and carbonic anhydrase inhibition.
Continue your study
Work through the complete notes and reinforce the topic with the study tools available in the full lesson.
