Receptor Blockade
Receptor Blockade - Related Videos
01:29
Neuromuscular Junction And Blockade
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2025
The site of chemical communication between a motor neuron and a muscle fiber is called the neuromuscular junction (NMJ). The end of the motor neuron at the NMJ divides into a cluster of synaptic end bulbs. The cytoplasm of these bulbs consists of synaptic vesicles enclosing acetylcholine molecules, the principal neurotransmitter released at the NMJ. The region opposite the synaptic bulb that ends in the muscle fiber is called the motor end plate, which has acetylcholine receptors. Within the...
08:50
Deep Neuromuscular Blockade Leads to a Larger Intraabdominal Volume During Laparoscopy
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Cited by 49 •
2013
This article presents a method for measuring the working abdominal volume during laproscopic myomectomy using the surgical grasper, and applies this technique to obtain pilot data on whether deep neuromuscular blockade (NMB) can enable the use of lower insufflation pressure. Reduced insufflation pressure during laproscopic surgery has been shown to reduce post-operative pain, and thus the use of NMB during surgery may enable improved patient outcomes.
11:55
Induction of Alloantigen-specific Anergy in Human Peripheral Blood Mononuclear Cells by Alloantigen Stimulation with Co-stimulatory Signal Blockade
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Cited by 9 •
2011
This paper describes a simple technique to induce alloantigen-specific anergy in human peripheral blood mononuclear cells. The technique can be applied clinically to generate non-alloreactive donor cells. Infusion of these cells could improve immune reconstitution and reduce toxicity after allogeneic hematopoietic stem cell transplantation.
12:03
Receptor Autoradiography Protocol for the Localized Visualization of Angiotensin II Receptors
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Cited by 14 •
2016
Here we present a protocol to describe the localization of angiotensin II Type 1 receptors in the rat brain by quantitative, densitometric, in vitro receptor autoradiography using an iodine-125 labeled analog of angiotensin II.
08:40
An ELISA Based Binding and Competition Method to Rapidly Determine Ligand-receptor Interactions
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Cited by 40 •
2016
The presented protocols describe two enzyme-linked immunosorbent assay (ELISA) based techniques for the rapid investigation of ligand-receptor interactions: The first assay allows the determination of dissociation constant between ligand and receptor. The second assay enables a rapid screening of blocking peptides for ligand-receptor interactions.
FAQs
The key distinction is how the blocker limits receptor signaling. A competitive blocker occupies the same binding site used by an agonist, so the two molecules compete for receptor access. A noncompetitive mechanism alters receptor activity without relying on direct competition at that site. This difference helps pharmacologists interpret changes in signaling and compare drug actions.
Dose-response relationships show how the extent of receptor blockade changes as drug exposure changes. Researchers use these patterns to characterize potency, meaning the amount of drug needed to produce a given blocking effect. Comparing responses also helps distinguish stronger or weaker blockers and supports decisions about how effectively a compound controls excessive receptor-mediated activity.
Selectivity indicates how specifically a blocker affects the receptor or signaling process under investigation rather than producing broader actions. High selectivity can help link an observed physiological change to a particular receptor pathway, while limited selectivity may contribute to additional effects. Pharmacologists therefore assess selectivity alongside potency when interpreting therapeutic actions and adverse reactions.
By limiting downstream signaling, receptor blockade can reduce several receptor-driven processes, including neurotransmission, hormone action, inflammation, and vascular contraction. The resulting physiological effect depends on which receptor pathway is being controlled. This mechanism makes blockade useful for studying how signaling contributes to normal function, excessive activity, and drug-induced changes in the body.
Researchers examine how a blocker interacts with a receptor and how that interaction changes downstream responses. They compare the resulting effects across drug amounts and use dose-response relationships to assess potency. Evaluating whether the action is competitive or noncompetitive, and whether it is selective, provides a framework for interpreting the compound's mechanism and expected physiological consequences.
Receptor blockade is relevant when treatment requires reducing an excessive physiological signal, such as heightened neurotransmission, hormone action, inflammation, or vascular contraction. Pharmacologists use receptor interactions to connect a drug's mechanism with its therapeutic effects and possible adverse reactions. This context supports the selection and evaluation of medicines designed to control specific signaling pathways.