Disease, Drugs, and Molecular Targets
From molecules to medicine
Molecular dysfunction
When molecular systems go wrong, neurons may signal too much, too little, or in the wrong place. Changes in receptors, ion channels, neurotransmitter levels, protein folding, or gene regulation can all contribute to disease.
Examples of relevance
Molecular neuroscience helps explain conditions such as epilepsy, neurodegenerative diseases, psychiatric disorders, and inherited channel disorders. It also helps researchers understand why people respond differently to the same drug.
Important caution
Brain disorders are complex and usually cannot be explained by a single molecule or a single cause.
How drugs work
Many neurological and psychiatric drugs act by changing receptor activity, neurotransmitter levels, ion channel behavior, or signaling pathways. A drug may mimic a neurotransmitter, block a receptor, or influence how much messenger is available.
Molecular drug actions
| Action | Simple meaning |
|---|---|
| Agonist | Activates a receptor |
| Antagonist | Blocks a receptor |
| Reuptake inhibitor | Keeps neurotransmitter in the synapse longer |
| Channel modulator | Changes ion channel activity |
What is one way a drug can affect neural signaling?
Many drugs affect receptors and signaling pathways.
Correct answer: By changing receptor activity
Name one molecular target for a neurological drug.
Other valid answers include ion channel, transporter, or enzyme.
Correct answer: receptor