Acetylcholine Binding
Acetylcholine Binding - Related Videos
06:39
Intracoronary Acetylcholine Provocation Testing for Assessment of Coronary Vasomotor Disorders
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Cited by 36 •
2016
Intracoronary acetylcholine testing has been established for the assessment of epicardial coronary spasm more than 30 years ago. Recently, the focus has shifted towards the microcirculation and it has been shown that microvascular spasm can be detected using ACH-testing. This article describes the ACH-test and its implementation in daily routine.
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.
02:18
The Equilibrium Binding Constant and Binding Strength
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2020
The equilibrium binding constant (Kb) quantifies the strength of a protein-ligand interaction. Kb can be calculated as follows when the reaction is at equilibrium: where P and L are the unbound protein and ligand, respectively, and PL is the protein-ligand complex. As the amount of bound ligand is also related to the rate of ligand binding, experiments can also determine Kb by examining the rates of protein-ligand association (kon) and dissociation (koff) using the following ratio: Thus,...
07:59
Acetylcholine Re-Challenge After Intracoronary Nitroglycerine Administration
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Cited by 3 •
2022
This protocol presents the acetylcholine rechallenge after nitroglycerine as an add-on procedure to spasm provocation testing. The purpose of this technique is to unmask co-existing microvascular spasm in patients with epicardial spasm and to assess the protective efficacy of nitroglycerine on a per-patient level to guide medical therapy.
02:40
Ligand Binding Sites
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2020
Proteins are dynamic macromolecules that carry out a wide variety of essential processes; however, the activities of most proteins depend on their interactions with other molecules or ions, known as ligands. Protein-ligand interactions are quite specific; even though numerous potential ligands surround a cellular protein at any given time, only a particular ligand can bind to that protein. Moreover, a ligand binds only to a dedicated area on the surface of the protein, known as the...
FAQs
The two receptor classes translate acetylcholine binding into cellular responses through different mechanisms. Nicotinic receptor binding produces a conformational change that opens an ion channel, while muscarinic receptor binding activates G protein-coupled signaling pathways. This distinction allows pharmacologists to relate a compound’s receptor preference to its expected effects on cellular activity and physiological regulation.
Affinity indicates how strongly a molecule associates with a cholinergic receptor, whereas binding kinetics describe the timing of that association and its changes over time. Examining both properties gives a more complete picture than either measurement alone. These data help researchers characterize cholinergic compounds and assess how selectively they interact with receptor targets.
Selectivity helps distinguish whether a compound preferentially interacts with particular cholinergic receptor targets or produces broader receptor engagement. Interpreting binding results alongside receptor class information can connect molecular interactions with different cellular signaling outcomes. This is especially relevant when comparing agonists and antagonists during pharmacological characterization, because their receptor interactions can support different experimental interpretations.
These compound categories provide complementary tools for studying cholinergic pharmacology. Agonists and antagonists can be characterized through their interactions with cholinergic receptors, while enzyme inhibitors are included among the cholinergic drugs examined in binding-related analyses. Comparing these agents helps researchers investigate receptor affinity, binding behavior, and selectivity within a common experimental framework.
Measurements of acetylcholine binding can provide information about receptor affinity, binding kinetics, and selectivity. Together, these outcomes help establish how a cholinergic compound interacts with its molecular target and support comparisons among candidate drugs. The resulting characterization is useful for connecting receptor-level observations with broader studies of nervous system signaling and pharmacological action.
In pharmacology, binding studies support the characterization of cholinergic drugs and the investigation of receptor-mediated signaling. Researchers can use these analyses to examine compounds relevant to cognition, muscle control, cardiovascular regulation, and autonomic signaling. The findings contribute to therapeutic research by clarifying molecular interactions associated with nervous system function and related physiological processes.