D2 Dopamine Receptors
D2 Dopamine Receptors - Related Videos
02:09
Monitoring Dopamine Release in a Rat Model with VTA Dopaminergic Neuron Receptor Manipulation
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2025
This video demonstrates the implantation of electrodes and cannulas in an anesthetized rat to measure dopamine release in the nucleus accumbens using a potentiostat and the infusion of drugs to modulate dopaminergic activity in the ventral tegmental area.
10:19
High-throughput Flow Cytometry Cell-based Assay to Detect Antibodies to N-Methyl-D-aspartate Receptor or Dopamine-2 Receptor in Human Serum
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Cited by 15 •
2013
Over the recent years, live cell-based assays have been used successfully to detect antibodies against surface and conformational antigens. Here, we describe a method using high-throughput flow cytometry enabling the analysis of large cohorts of patients. Detection of novel antibodies will improve diagnosis and treatment of immune-mediated disorders.
05:01
Measuring Dopamine Uptake in Mouse Brain Synaptosomes Using Radiolabeled Dopamine
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2025
This video demonstrates the assessment of dopamine uptake in synaptosomes harvested from mouse brains. It outlines steps for preparing synaptosomes for dopamine uptake via dopamine transporters, treating them with varying concentrations of radiolabeled dopamine, isolating the synaptosomes, and measuring radioactivity to quantify dopamine uptake.
04:43
Topical Testing Assay: A Technique to Evaluate the Insecticidal Potential of Dopamine Receptor Antagonists on Adult Female Mosquitoes by Topical Application
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2025
In this video, we demonstrate the topical testing assay to determine the toxicity of a potential insecticide on adult female mosquitoes. Using a dopamine receptor antagonist that causes lethal inhibition of neurotransmission in mosquitoes, this method describes a way to evaluate the toxic effects of insecticides upon topical application.
01:28
Drugs Affecting GI Tract Motility: Dopamine Receptor Antagonists
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2024
Prokinetic agents are specialized medications that stimulate gastrointestinal (GI) motility, promoting food movement through the GI tract. Dopamine, an inhibitory neurotransmitter, plays a significant role in this process, reducing GI motility and indirectly controlling the speed of digestion. Dopamine receptor antagonists, such as metoclopramide and domperidone, offer a unique advantage as prokinetic agents. By blocking the dopamine receptors, these drugs increase GI motility, improving food...
FAQs
At presynaptic terminals, D2 receptors provide a feedback mechanism: when activated by dopamine, they help limit additional dopamine release. This local control can restrain the amount of transmitter entering a circuit rather than simply changing the response of a receiving neuron. Studying this feedback is important for understanding how dopamine signals are shaped over time and across neural pathways.
Activation of D2 receptors engages Gi/o proteins, leading to inhibition of adenylyl cyclase and lower cyclic AMP production. The signaling also influences ion channels, which can alter neuronal excitability. These linked effects connect an extracellular dopamine signal to changes in intracellular regulation and electrical behavior, giving researchers molecular and cellular readouts for D2 receptor activity.
The outcome depends on where the receptor is expressed and which cellular processes are coupled to its signaling. In the basal ganglia, D2-related signaling contributes to motor control, whereas activity in other circuits is associated with motivation, learning, and cognition. This circuit dependence helps explain why the same receptor is relevant to several behavioral and neurological questions.
In Parkinson’s disease research, D2 dopamine receptors provide a way to examine dopamine-related regulation of basal ganglia circuits and motor control. Their signaling is also relevant to antiparkinsonian drug action. Investigators can therefore use D2 receptor biology to connect molecular receptor responses with circuit-level questions about movement and the regulation of motor behavior.
D2 dopamine receptors are important targets for investigating how antipsychotic drugs affect dopamine signaling. Their relevance to schizophrenia research comes from the connection between receptor-mediated regulation and brain circuit function, not from a single cellular effect alone. Examining these receptors helps relate drug action to broader changes in neuronal signaling and to cognitive processes associated with relevant circuits.
Studies of D2 receptors can examine how dopamine signaling relates to motivation, learning, and addiction. Because receptor effects vary across brain circuits, researchers can ask whether altered D2-linked signaling is associated with changes in these functions rather than treating dopamine as a uniform signal. This makes the receptor useful for connecting molecular mechanisms with complex behavior.