Serotonin Receptors
Serotonin Receptors - Related Videos
01:23
Drugs Affecting GI Tract Motility: Serotonin Receptor Agonists
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2024
Serotonin, a crucial neurotransmitter synthesized by enterochromaffin cells, plays a cardinal role in regulating gastrointestinal (GI) motility. With over 90% of the body's total serotonin in the GI tract, its influence on digestive processes is profound. Serotonin is swiftly released upon various stimuli, such as food boluses or certain drugs, triggering intrinsic sensory neurons in the myenteric plexus and extrinsic vagal and spinal sensory neurons. This leads to the activation of the...
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.
12:21
Thermostabilization, Expression, Purification, and Crystallization of the Human Serotonin Transporter Bound to S-citalopram
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Cited by 15 •
2016
This manuscript describes how to screen for thermostabilizing mutations, purify the human serotonin transporter, generate high affinity antibodies, and crystallize the serotonin transporter-antibody complex bound to the antidepressant drug S-citalopram. This protocol can be adapted to the study of other challenging membrane transporters, receptors, and channels.
10:50
Muscle Receptor Organs in the Crayfish Abdomen: A Student Laboratory Exercise in Proprioception
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Cited by 38 •
2010
The primary purpose of this experiment is to understand how primary sensory neurons convey information of joint movements and positions as proprioceptive information for an animal. An additional objective of this report is present the anatomy of the preparation by dissection and viewing of neurons under a dissecting microscope.
07:27
Two-photon Imaging of Microglial Processes' Attraction Toward ATP or Serotonin in Acute Brain Slices
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Cited by 22 •
2019
Microglia, the resident immune cells of the brain, respond quickly with morphological changes to modifications of their environment. This protocol describes how to use two-photon microscopy to study the attraction of microglial processes toward serotonin or ATP in acute brain slices of mice.
FAQs
The main mechanistic distinction is between the G protein-coupled receptors and the 5-HT3 receptor. G protein-coupled subtypes change intracellular second-messenger pathways through signaling partners, producing responses that depend on the receptor and cell context. By contrast, 5-HT3 forms a ligand-gated ion channel, so receptor activation directly regulates ion flow across the cell membrane.
These factors determine how a serotonin signal is translated into a cellular response. Different subtypes can engage different intracellular pathways, while their distribution places them in distinct nervous-system or peripheral-tissue environments. The same neurotransmitter can therefore produce different effects depending on which receptor subtype is present, where it is expressed, and which signaling partner is available.
Selectivity allows a drug to favor particular receptor subtypes rather than influencing the entire receptor family equally. Because subtype distribution and signaling differ, this choice can affect both the intended pharmacological response and the likelihood of unwanted effects. Comparing receptor properties helps guide the design of agonists and antagonists with more precisely targeted actions.
They examine receptor distribution together with the signaling pathways associated with each subtype. This links a drug's receptor preference to the tissues and intracellular responses it may influence. Such analysis helps explain why compounds produce particular therapeutic effects or adverse reactions, and it provides a scientific basis for comparing candidate drugs during pharmacological research.
Their involvement in communication across the nervous system and other tissues makes distinct receptor subtypes relevant to several conditions. Pharmacologists can use agonists or antagonists to influence selected receptor-mediated pathways. Understanding which subtype and signaling response are involved supports treatment strategies that connect receptor activity with the clinical problem being addressed.
Mapping where receptor subtypes occur and determining how they signal can show why a drug affects more than its intended target. Activity at receptors in different tissues may contribute to unwanted responses, while differences in signaling partners can alter cellular outcomes. This information helps researchers interpret adverse reactions and refine treatment design for greater precision.