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Nicotinic acetylcholine receptors, or nAChRs, are receptor polypeptides that respond to the neurotransmitter acetylcholine. Nicotinic receptors also respond to drugs such as the agonist nicotine. They are found in the central and peripheral nervous system, muscle, and many other tissues of many organisms. At the neuromuscular junction they are ...
Although all acetylcholine receptors, by definition, respond to acetylcholine, they respond to other molecules as well. Nicotinic acetylcholine receptors (nAChR, also known as "ionotropic" acetylcholine receptors) are particularly responsive to nicotine. The nicotine ACh receptor is also a Na +, K + and Ca 2+ ion channel.
The alpha-7 nicotinic receptor, also known as the α7 receptor, is a type of nicotinic acetylcholine receptor implicated in long-term memory, consisting entirely of α7 subunits. [1] As with other nicotinic acetylcholine receptors, functional α7 receptors are pentameric [i.e., (α7) 5 stoichiometry]. It is located in the brain, spleen, and ...
A 2015 review noted that stimulation of the α4β2 nicotinic receptor is responsible for certain improvements in attentional performance; [62] among the nicotinic receptor subtypes, nicotine has the highest binding affinity at the α4β2 receptor (k i =1 nM), which is also the biological target that mediates nicotine's addictive properties. [63]
The farther the micropipette was from the motor endplate, the smaller the depolarization was in the muscle fiber. This allowed the researchers to determine that the nicotinic receptors were localized to the motor endplate in high density. [4] [5] Toxins are also used to determine the location of acetylcholine receptors at the neuromuscular ...
The neuronal acetylcholine receptor subunit alpha-5, or alpha-5 nicotinic acetylcholine receptor (α5 nAChR) also known as the α5 receptor is a type of ligand gated neuronal type subunit of the nicotinic acetylcholine receptor involved in pain regulation encoded in the human by the CHRNA5 gene. This receptor is commonly associated with ...
Cholinergic blocking drugs are a group of drugs that block the action of acetylcholine (ACh), a neurotransmitter, in synapses of the cholinergic nervous system. [1] They block acetylcholine from binding to cholinergic receptors, namely the nicotinic and muscarinic receptors. These agents have broad effects due to their actions in nerves located ...
Ligand-gated ion channels (LICs, LGIC), also commonly referred to as ionotropic receptors, are a group of transmembrane ion-channel proteins which open to allow ions such as Na +, K +, Ca 2+, and/or Cl − to pass through the membrane in response to the binding of a chemical messenger (i.e. a ligand), such as a neurotransmitter. [1][2][3] When ...