Nicotinic selective agonists are used in the treatment of which condition?

Nicotinic selective agonists are used in the treatment of which condition?

• A. Treatment of glaucoma
• B. Treatment of myasthenia gravis
• C. Treatment of Parkinson's disease
• D. Treatment of Alzheimer's disease

Answer: (B)

Nicotinic receptor activation at the neuromuscular junction directly drives muscle contraction. In myasthenia gravis, autoantibodies reduce functional nicotinic ACh receptors, weakening neuromuscular transmission. A nicotinic selective agonist would stimulate the remaining receptors, helping restore end-plate depolarization and improve muscle strength. In practice, increasing acetylcholine levels with acetylcholinesterase inhibitors achieves the same goal indirectly, but the core idea is to enhance nicotinic receptor activity at the NMJ to counteract receptor loss seen in myasthenia gravis. The other conditions involve different targets, so this mechanism is most relevant to treating myasthenia gravis.

Nicotinic receptor activation at the neuromuscular junction directly drives muscle contraction. In myasthenia gravis, autoantibodies reduce functional nicotinic ACh receptors, weakening neuromuscular transmission. A nicotinic selective agonist would stimulate the remaining receptors, helping restore end-plate depolarization and improve muscle strength. In practice, increasing acetylcholine levels with acetylcholinesterase inhibitors achieves the same goal indirectly, but the core idea is to enhance nicotinic receptor activity at the NMJ to counteract receptor loss seen in myasthenia gravis. The other conditions involve different targets, so this mechanism is most relevant to treating myasthenia gravis.