a(MESH:"Receptors, Nicotinic")
Nicotinic receptors are formed by five different subunits: α, β, δ, and γ (fetal) or ε (adult) PubMed:26813123
Nicotinic receptors are formed by five different subunits: α, β, δ, and γ (fetal) or ε (adult) PubMed:26813123
Nicotinic receptors are formed by five different subunits: α, β, δ, and γ (fetal) or ε (adult) PubMed:26813123
It was now possible to follow reversible binding to these purified membranes using the nicotinic agonist decamethonium as the radioactive ligand (by the method of equilibrium dialysis that Gilbert and Müller-Hill (9) used to identify the lac repressor) PubMed:23038257
The detergent deoxycholate gently extracted the binding protein without denaturing it, and bound decamethonium was displaced by var- ious nicotinic agonists and antagonists, including curare and Flaxedil in the order of their physiological effects PubMed:23038257
Similarly, nicotine can mimic the ACh effects on the HPA axis by activating nicotinic receptors PubMed:26813123
Similarly, nicotine can mimic the ACh effects on the HPA axis by activating nicotinic receptors PubMed:26813123
Moreover, the use of M2 antagonists, such as SCH-57790 and SC-72788, can lead to blockage of M2-mediated inhibition of presynaptic release of ACh, which can activate M1 and nicotinic receptors, ameliorating cognitive impairment in AD PubMed:26813123
Nicotinic receptors are formed by five different subunits: α, β, δ, and γ (fetal) or ε (adult) PubMed:26813123
On the other hand, neuronal nicotinic receptors are formed by the combination of only two types of subunits (α2-10 and β2-4) PubMed:26813123
On the other hand, neuronal nicotinic receptors are formed by the combination of only two types of subunits (α2-10 and β2-4) PubMed:26813123
On the other hand, neuronal nicotinic receptors are formed by the combination of only two types of subunits (α2-10 and β2-4) PubMed:26813123
On the other hand, neuronal nicotinic receptors are formed by the combination of only two types of subunits (α2-10 and β2-4) PubMed:26813123
On the other hand, neuronal nicotinic receptors are formed by the combination of only two types of subunits (α2-10 and β2-4) PubMed:26813123
On the other hand, neuronal nicotinic receptors are formed by the combination of only two types of subunits (α2-10 and β2-4) PubMed:26813123
On the other hand, neuronal nicotinic receptors are formed by the combination of only two types of subunits (α2-10 and β2-4) PubMed:26813123
On the other hand, neuronal nicotinic receptors are formed by the combination of only two types of subunits (α2-10 and β2-4) PubMed:26813123
On the other hand, neuronal nicotinic receptors are formed by the combination of only two types of subunits (α2-10 and β2-4) PubMed:26813123
On the other hand, neuronal nicotinic receptors are formed by the combination of only two types of subunits (α2-10 and β2-4) PubMed:26813123
On the other hand, neuronal nicotinic receptors are formed by the combination of only two types of subunits (α2-10 and β2-4) PubMed:26813123
Nicotinic receptors are formed by five different subunits: α, β, δ, and γ (fetal) or ε (adult) PubMed:26813123
Contrary to anatabine, (−)-nicotine and other nicotinic acetylcholine receptors agonists and antagonists do not inhibit Aβ production by 7W CHO cells (Fig. 3). PubMed:21958873
Contrary to anatabine, (−)-nicotine and other nicotinic acetylcholine receptors agonists and antagonists do not inhibit Aβ production by 7W CHO cells (Fig. 3). PubMed:21958873
Contrary to anatabine, (−)-nicotine and other nicotinic acetylcholine receptors agonists and antagonists do not inhibit Aβ production by 7W CHO cells (Fig. 3). PubMed:21958873
Contrary to anatabine, (−)-nicotine and other nicotinic acetylcholine receptors agonists and antagonists do not inhibit Aβ production by 7W CHO cells (Fig. 3). PubMed:21958873
Contrary to anatabine, (−)-nicotine and other nicotinic acetylcholine receptors agonists and antagonists do not inhibit Aβ production by 7W CHO cells (Fig. 3). PubMed:21958873
Biochemical and pharmacological studies have characterized mecamylamine as a nonselective, voltage dependent and noncompetitive receptor antagonist of neuronal nAChRs and it is often referred to as a “nicotine receptor antagonist.” PubMed:28391535
For example, some biochemical studies suggest that mecamylamine is a channel blocker that inhibits most neuronal nAChRs (e.g., [131–133]). PubMed:28391535
(-)-Nicotine activates all brain nAChR subtypes, but binds preferentially and with high affinity to α4β2 nAChRs (e.g., [12]) PubMed:28391535
This conclusion is based on the fact that the stimulus effects of nicotine are convincingly blocked by (a) mecamylamine, a voltage dependent noncompetitive channel blocker at nicotinic receptors (Fig. 3; Table 4) and (b) dihydro-β-erythrodine (DHβE), a nicotinic receptor antagonist that shows high affinity for the nAChR α4β2 subunit (Fig. 3; Table 5) but not by methyllycaconitine (MLA), a α7 nicotinic receptor antagonist (Table 5). PubMed:28391535
DHβE (Fig. 3) is an alkaloid found in plant seeds of Erythrina and is a competitive nAChR receptor antagonist with a preference for neuronal β2 subtypes PubMed:28391535
In a work that evaluated the function of the cholinergic system in mediating the response to stress it was found that treatment of rats with the antagonist of the nicotinic receptor, mecamylamine, attenuates the activation of the HPA axis in response to a stressor agent PubMed:26813123
In the peripheral nervous system, activation of nicotinic receptors leads to rapid synaptic transmission PubMed:26813123
In the CNS, most of the nicotinic receptors are expressed at the presynaptic neuronal membrane and their main role is to regulate the release of neurotransmitters, whereas nicotinic receptors expressed in the peripheral nervous system are mainly post-synaptic PubMed:26813123
Stimulation of nicotinic receptors present at the CNS presynaptic neuronal membrane leads to an increase in presynaptic Ca2+ concentration, which may facilitate the release of a number of neurotransmitters, such as glutamate, GABA, dopamine, serotonin, norepinephrine, as well as ACh PubMed:26813123
However, further studies have demonstrated that nicotinic receptor activation can lead to an increase in Aβ-mediated tau phosphorylation PubMed:26813123
Also, α7- and non-α7-containing nicotinic receptors directly or indirectly (through GABAergic interneurons) modulate serotonin release in spinal cord slices230. However, the identity of the receptors that are responsible for the spinal control of nociception is currently unknown. in this process, the nicotine-induced antinociception seems to be mediated primarily by activation of calcium– calmodulin-dependent protein kinase 2, but this is not the case for supraspinal nociception control229. PubMed:19721446
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