Dopamine Homeostasis
Dopamine Homeostasis - Related Videos
11:26
Assessment of Dopaminergic Homeostasis in Mice by Use of High-performance Liquid Chromatography Analysis and Synaptosomal Dopamine Uptake
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Cited by 20 •
2017
Synaptosomal dopamine uptake and high-performance liquid chromatography analysis represent experimental tools to investigate dopamine homeostasis in mice by assessing the function of the dopamine transporter and levels of dopamine in striatal tissue, respectively. Here we present protocols to measure dopamine tissue content and assess the functionality of the dopamine transporter.
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.
01:16
What is Homeostasis?
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2023
Maintaining homeostasis requires that the body continuously maintain its internal conditions. Each physiological condition has a particular set point, from body temperature to blood pressure to levels of certain nutrients. A set point is the physiological value around which the normal range fluctuates. A normal range is a restricted set of values that is optimally healthful and stable. For example, the set point for normal human body temperature is approximately 37°C (98.6°F). Physiological...
01:31
pH Homeostasis
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2023
Acid-base homeostasis is essential for maintaining normal physiological activities in humans. The pH of various body fluids is strictly regulated because it is critical for the optimal activity of enzymes involved in metabolic reactions. Enzymes are basically proteins, so, any significant change in pH can affect their structure and activity. In humans, pH is regulated using three primary mechanisms— chemical buffer systems, respiratory regulation, and renal regulation. Respiratory Regulation of...
02:11
Formulating a Dopamine-Loaded Exosome Carrier System
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2025
Source: Yavuz, B., et al. Formulating and Characterizing an Exosome-based Dopamine Carrier System. J. Vis. Exp. (2022)This video demonstrates the formulation of dopamine-loaded exosomes, focusing on saponin-induced membrane permeabilization to enhance dopamine encapsulation within exosomes.
FAQs
Tyrosine hydroxylase supports the production of dopamine, but synthesis alone does not determine how much signaling occurs. Vesicular release controls delivery into neural communication sites, while presynaptic autoreceptors provide feedback that can adjust dopaminergic activity. Considering these steps together helps explain how the brain keeps dopamine-related communication within a functional range rather than treating production as an isolated event.
Presynaptic autoreceptors and dopamine transporters regulate different stages of dopamine signaling. Autoreceptors act at the releasing neuron to adjust ongoing dopaminergic activity, whereas transporters influence how quickly dopamine is removed from communication sites. Their complementary actions help prevent excessive or insufficient signaling, making both components important when evaluating how neural circuits respond to changing demands.
Monoamine oxidase and catechol-O-methyltransferase contribute to dopamine breakdown after it has been released. Their activity affects how long dopamine remains available for signaling and therefore influences the strength and duration of dopaminergic communication. Examining enzymatic clearance alongside transporters gives neuroscience researchers a more complete view of how dopamine concentration is controlled within neural circuits.
Medications, addictive substances, and stress can alter the coordinated processes that regulate dopamine production, release, signaling, and clearance. Such changes may shift dopaminergic communication away from its functional range, affecting movement, motivation, learning, attention, or reward processing. Comparing these influences helps researchers distinguish how different challenges modify dopamine-related circuit function and behavioral outcomes.
Parkinson’s disease research uses dopamine homeostasis as a framework for examining how altered dopaminergic regulation affects neural circuit function, especially in relation to movement. Studying synthesis, release, signaling, and clearance together can clarify how disease-associated changes influence communication within the brain. This perspective supports efforts to develop improved approaches for studying and treating the disorder.
Dopamine homeostasis provides a way to investigate how medications, addictive substances, and other influences modify dopamine-related signaling in neural circuits. In schizophrenia and substance use disorder research, this framework connects molecular regulation with changes in reward processing, motivation, attention, learning, or broader circuit function. The resulting knowledge can inform improved approaches to studying and treating these conditions.