Which neurotransmitter system is targeted by the first-line Alzheimer medication?

Which neurotransmitter system is targeted by the first-line Alzheimer medication?

• A. Dopaminergic system
• B. GABAergic system
• C. Cholinergic (acetylcholine) system
• D. Serotonergic system

Answer: (C)

The main idea is that Alzheimer's symptoms, especially early memory problems, are driven in part by loss of cholinergic neurons that use acetylcholine. The first-line medications are acetylcholinesterase inhibitors, which block the enzyme that breaks down acetylcholine. By preventing breakdown, they raise acetylcholine levels at synapses, particularly in brain areas important for memory, helping with attention and cognition in the early stages of the disease. So boosting the cholinergic system aligns with the underlying problem and provides the best-supported symptomatic benefit upfront. Dopaminergic, GABAergic, and serotonergic systems are involved in other brain functions and disorders, but they aren’t the primary target for the first-line treatment of Alzheimer's. (Memantine exists for later stages and acts on the glutamatergic system, but that’s not the usual first-line option in mild cases.)

The main idea is that Alzheimer's symptoms, especially early memory problems, are driven in part by loss of cholinergic neurons that use acetylcholine. The first-line medications are acetylcholinesterase inhibitors, which block the enzyme that breaks down acetylcholine. By preventing breakdown, they raise acetylcholine levels at synapses, particularly in brain areas important for memory, helping with attention and cognition in the early stages of the disease. So boosting the cholinergic system aligns with the underlying problem and provides the best-supported symptomatic benefit upfront.

Dopaminergic, GABAergic, and serotonergic systems are involved in other brain functions and disorders, but they aren’t the primary target for the first-line treatment of Alzheimer's. (Memantine exists for later stages and acts on the glutamatergic system, but that’s not the usual first-line option in mild cases.)