Cell communication

Signal mechanism: Fentanyl is the ligand. It is a synthetic opioid that acts as an agonist for opioid receptors.

Type of receptor: Fentanyl, a potent synthetic opioid, exerts its effects primarily through the mu-opioid receptor (MOR), which is part of the G-protein coupled receptor (GPCR) superfamily.

Basics of signal transduction pathway:

• Binding: Fentanyl binds to the extracellular domain of the mu-opioid receptor.

• Activation:Upon ligand binding, the receptor undergoes a conformational change, activating the G-protein ( α, β, and γ subunits).

• Signal transduction: The activated Gα subunit inhibits adenylate cyclase, leading to a decrease in cAMP levels; resulting in reduced protein kinase A activity.

Ion channel modulation:

Specifics of cellular response and organismal response:

Hyperpolarization of neurons reduces their excitability.

Inhibition of neurotransmitter release diminishes pain signal transmission.