4-DAMP

4-DAMP

Chemical structure of 4-DAMP

3D model of 4-DAMP

4-DAMP (4-Diphenylacetoxy-N-methylpiperidine methiodide) is a muscarinic receptor antagonist that is selective for the M3 muscarinic receptor subtype. It is used primarily in pharmacological research to study the role of muscarinic receptors in various physiological processes.

Chemical Properties

4-DAMP is a quaternary ammonium compound with the chemical formula C21H26NO2I. It is characterized by its diphenylacetoxy group attached to a piperidine ring, which is further methylated and iodinated to form the methiodide salt. This structure contributes to its high affinity and selectivity for the M3 muscarinic receptor.

Mechanism of Action

As a muscarinic antagonist, 4-DAMP binds to the muscarinic acetylcholine receptors, particularly the M3 subtype, and inhibits their activation by acetylcholine. This blockade prevents the downstream signaling pathways that are typically activated by acetylcholine binding, such as the phospholipase C pathway, which leads to a decrease in intracellular calcium levels and reduced smooth muscle contraction.

Applications in Research

4-DAMP is widely used in research to investigate the physiological and pathological roles of M3 muscarinic receptors. It is particularly useful in studies involving:

• Smooth muscle contraction: 4-DAMP is used to study the role of M3 receptors in smooth muscle tissues, such as those found in the gastrointestinal tract, bladder, and airways.
• Glandular secretion: The compound helps elucidate the involvement of M3 receptors in the secretion of various glands, including salivary glands and sweat glands.
• Cardiovascular system: Research involving 4-DAMP can provide insights into the role of M3 receptors in vasodilation and heart rate regulation.

Safety and Handling

As with many chemical compounds used in research, appropriate safety measures should be taken when handling 4-DAMP. It should be used in a controlled laboratory environment, with proper personal protective equipment such as gloves and goggles.

Related Pages

• Muscarinic acetylcholine receptor
• M3 receptor
• Antagonist (pharmacology)
• Pharmacology

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