Nicotinic Receptor Antagonist
Nicotinic Receptor Antagonist - Related Videos
08:47
Spectral Confocal Imaging of Fluorescently tagged Nicotinic Receptors in Knock-in Mice with Chronic Nicotine Administration
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Cited by 12 •
2012
We have developed a novel technique of quantifying nicotinic acetylcholine receptor changes within subcellular regions of specific subtypes of CNS neurons to better understand the mechanisms of nicotine addiction by using a combination of approaches including fluorescent protein tagging of the receptor using the knock-in approach and spectral confocal imaging.
01:15
Cholinergic Receptors: Nicotinic
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2023
Nicotinic receptors are ligand-gated ion channels that are activated by acetylcholine and nicotine. Upon activation, they cause a rapid increase in the permeability of cells to K+, Na+, and Ca2+, followed by depolarization and excitation. They are in the autonomic ganglia, skeletal neuromuscular junction, CNS, and adrenal medulla. There are two types of nicotinic receptors: neuromuscular (NM/NM/N1) and neuronal (NN/NN/N2). The two families differ based on their location and selectivity to...
09:06
Localization of Plasma Membrane and Intracellular Neuronal Nicotinic Acetylcholine Receptors Using Quantitative Imaging in Mammalian Cells
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2025
This protocol describes expression and quantification of neuronal nicotinic acetylcholine receptors subunits using the mammalian Neuro-2a cell line. pH-sensitive fluorescent tags and confocal microscopy enable precise evaluation of receptor localization at the plasma membrane versus those expressed in pH-neutral intracellular compartments, facilitating the study of nAChR trafficking and pharmacological modulation.
10:04
Local Application of Drugs to Study Nicotinic Acetylcholine Receptor Function in Mouse Brain Slices
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Cited by 23 •
2012
In this paper, we describe a useful method to study ligand-gated ion channel function in neurons of acutely isolated brain slices. This method involves the use of a drug-filled micropipette for local application of drugs to neurons recorded using standard patch clamp techniques.
01:28
Drug-Receptor Interaction: Antagonist
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2023
An antagonist is a drug that binds strongly to a receptor without activating it. An antagonist prevents other molecules, such as neurotransmitters or hormones, from binding to the receptor and triggering a cellular response. Such interaction effectively hinders the normal physiological processes mediated by the receptor, resulting in various pharmacological effects depending on the specific receptor targeted. Antagonists can be classified as competitive or noncompetitive based on their...
FAQs
Their effects can arise through more than one molecular route. Some prevent acetylcholine from activating the receptor, while others interfere with the receptor’s ion-conducting function after or independently of activation. These distinct actions reduce sodium and calcium entry through the channel, allowing researchers to examine how receptor activation contributes to neuronal excitation.
Sodium and calcium entry are key indicators of the excitatory consequences of nicotinic receptor activity. Reducing these ion movements limits the receptor’s contribution to neuronal excitation and changes how cholinergic signals influence communication between nerve cells. Measuring the resulting change in signaling helps connect receptor-level interference with broader nervous-system function.
Nicotinic receptor antagonists can help distinguish receptor subtypes by selectively reducing signaling associated with particular receptor populations. This approach allows investigators to separate contributions that might otherwise appear as one combined cholinergic effect. Subtype-focused comparisons can clarify which receptors participate in synaptic transmission, attention, movement, reward, or autonomic function.
A common strategy is to reduce nicotinic signaling and examine which neural function changes as a result. Investigators can compare responses before and after antagonist exposure, then relate altered neuronal excitation or pathway activity to the function under study. This design helps identify whether nicotinic receptors contribute to a particular component of cholinergic communication.
These compounds can be used to investigate cholinergic contributions to synaptic transmission, attention, movement, reward, and autonomic function. Reducing receptor signaling provides a functional contrast that helps determine how strongly each process depends on nicotinic communication. The same approach can connect cellular receptor activity with coordinated neural or physiological outcomes.
In disorder research, antagonists help investigators examine whether altered nicotinic signaling contributes to a neurological condition. They can also support evaluation of therapeutic strategies aimed at changing cholinergic activity by showing how reduced receptor signaling affects relevant neural functions. Results may identify receptor pathways for further investigation rather than establish a treatment by themselves.