Biogenic amine receptor: Difference between revisions
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======Histamine H2 receptors====== | ======Histamine H2 receptors====== | ||
Histamine H2 receptors "act via G-proteins to stimulate adenylate cyclase. Among the many responses mediated by these receptors are gastric acid secretion, smooth muscle relaxation, inotropic and chronotropic effects on heart muscle, and inhibition of lymphocyte function."<ref name="MeSH-Histamine | Histamine H2 receptors "act via G-proteins to stimulate adenylate cyclase. Among the many responses mediated by these receptors are gastric acid secretion, smooth muscle relaxation, inotropic and chronotropic effects on heart muscle, and inhibition of lymphocyte function."<ref name="MeSH-Histamine H2 Receptors">{{cite web |url=http://www.nlm.nih.gov/cgi/mesh/2008/MB_cgi?term=Receptors,+Histamine+H2 |title=Receptors, Histamine H2 |accessdate=2008-01-16 |author=Anonymous |authorlink= |coauthors= |date= |format= |work= |publisher=National Library of Medicine |pages= |language= |archiveurl= |archivedate= |quote=}}</ref> | ||
Antagonists, such as [[ranitidine]], are used to treat gastrointestinal disorder such as [[peptic ulcer disease]] and [[gastroesophageal reflux disease]] that are due to hyperacidity. | Antagonists, such as [[ranitidine]], are used to treat gastrointestinal disorder such as [[peptic ulcer disease]] and [[gastroesophageal reflux disease]] that are due to hyperacidity. | ||
======Histamine H3 receptors====== | ======Histamine H3 receptors====== | ||
Histamine H3 receptors were "first recognized as inhibitory autoreceptors on histamine-containing nerve terminals and have since been shown to regulate the release of several neurotransmitters in the central and peripheral nervous systems.<ref name="MeSH-Histamine | Histamine H3 receptors were "first recognized as inhibitory autoreceptors on histamine-containing nerve terminals and have since been shown to regulate the release of several neurotransmitters in the central and peripheral nervous systems.<ref name="MeSH-Histamine H3 Receptors">{{cite web |url=http://www.nlm.nih.gov/cgi/mesh/2008/MB_cgi?term=Receptors,+Histamine+H3 |title=Receptors, Histamine H3 |accessdate=2008-01-16 |author=Anonymous |authorlink= |coauthors= |date= |format= |work= |publisher=National Library of Medicine |pages= |language= |archiveurl= |archivedate= |quote=}}</ref> | ||
===Serotonin receptors=== | ===Serotonin receptors=== | ||
Revision as of 00:40, 17 January 2008
Biogenic amine receptors are "cell surface proteins that bind biogenic amines with high affinity and regulate intracellular signals which influence the behavior of cells. Biogenic amine is a chemically imprecise term which, by convention, includes the catecholamines epinephrine, norepinephrine, and dopamine, the indoleamine serotonin, the imidazolamine histamine, and compounds closely related to each of these."[1]
Classification
Catecholamine receptors
Catecholamines are epinephrine, norepinephrine, dopamine. They are derived from the non-essential amino acid tyrosine which is found in casein in mild and cheese.
Catecholamine receptors are "cell surface proteins that bind catecholamines with high affinity and trigger intracellular changes which influence the behavior of cells. The catecholamine messengers epinephrine, norepinephrine, and dopamine are synthesized from tyrosine by a common biosynthetic pathway."[2]
Adrenergic receptors
alpha-Adrenergic Receptors
alpha-1 Adrenergic receptors
Alpha-1 adrenergic receptors are a "subclass of alpha-adrenergic receptors (Receptors, Adrenergic, alpha). Alpha-1 Adrenergic receptors can be pharmacologically discriminated, e.g., by their high affinity for the agonist phenylephrine and the antagonist prazosin. They are widespread, with clinically important concentrations in the liver, the heart, vascular, intestinal, and genitourinary smooth muscle, and the central and peripheral nervous systems."[3] Their functions include vasoconstriction.
Agonists, such as phenylephrine, are used to treat nasal congestion by causing vasoconstriction.
Antagonists, such as prazosin, are used to treat hypertension by blocking vasoconstriction.
alpha-2 Adrenergic receptors
Alpha-2 adrenergic receptors are a "subclass of alpha-adrenergic receptors (Receptors, adrenergic, alpha). Alpha-2 Adrenergic receptors can be pharmacologically discriminated, e.g., by their high affinity for the agonist clonidine and the antagonist yohimbine. They are found on pancreatic beta cells, platelets, and vascular smooth muscle, as well as both pre- and postsynaptically in the central and peripheral nervous systems."[4]
Agonists, such as clonidine, are used to treat hypertension.
Antagonists, such as yohimbine, are used to treat erectile dysfunction.
beta-Adrenergic Receptors
beta-1 Adrenergic receptors
Beta-1 adrenergic receptors are a "subclass of beta-adrenergic receptors (receptors, adrenergic, beta). Beta-1 adrenergic receptors are equally sensitive to epinephrine and norepinephrine and bind the agonist dobutamine and the antagonist metoprolol with high affinity. They are found in the heart, juxtaglomerular cells, and in the central and peripheral nervous systems."[5]
Agonists, such as dobutamine, are used to treat circulatory shock by increasing heart contractility.
Antagonists, such as metoprolol, are used to treat hypertension and tachyarrythmias.
beta-2 Adrenergic receptors
Beta-2 adrenergic receptors are a "subclass of beta-adrenergic receptors (receptors, adrenergic, beta). Beta-2 Adrenergic receptors are more sensitive to epinephrine than to norepinephrine and have a high affinity for the agonist terbutaline. They are widespread, with clinically important roles in skeletal muscle, liver, and vascular, bronchial, gastrointestinal, and genitourinary smooth muscle."[6]
Agonists, such as terbutaline, are used to treat asthma by preventing bronchoconstriction.
beta-3 Adrenergic receptors
Beta-3 adrenergic receptors are a "subclass of beta-adrenergic receptors (receptors, adrenergic, beta). Beta-3 adrenergic receptors are the predominant beta-adrenergic receptor type expressed in white and brown adipocytes and are involved in modulating energy metabolism and thermogenesis."[7]
Dopamine receptors
Dopamine is "one of the catecholamine neurotransmitters in the brain. It is derived from tyrosine and is the precursor to norepinephrine and epinephrine. Dopamine is a major transmitter in the extrapyramidal system of the brain, and important in regulating movement."[8]
Dopamine receptors are "cell-surface proteins that bind dopamine with high affinity and trigger intracellular changes influencing the behavior of cells."[9]
D1-like receptors
These receptors stimulate adenylate cyclase.[10]
Dopamine D1 receptors
Dopamine D5 receptors
D2-like receptors
These receptors inhibit adenylate cyclase.[11]
Dopamine D2 receptors
Dopamine D3 receptors
Dopamine D4 receptors
Histamine receptors
Histamine is an "amine derived by enzymatic decarboxylation of histidine. It is a powerful stimulant of gastric secretion, a constrictor of bronchial smooth muscle, a vasodilator, and also a centrally acting neurotransmitter."[12]
Histamine receptors are "cell-surface proteins that bind histamine and trigger intracellular changes influencing the behavior of cells. Histamine receptors are widespread in the central nervous system and in peripheral tissues. Three types have been recognized and designated H1, H2, and H3. They differ in pharmacology, distribution, and mode of action."[13]
Histamine H1 receptors
Histamine H1 receptors "operate through the inositol phosphate/diacylglycerol second messenger system. Among the many responses mediated by these receptors are smooth muscle contraction, increased vascular permeability, hormone release, and cerebral glyconeogenesis."[14]
Antagonists, such as chorpheniramine, are used to treat allergic rhinitis.
Histamine H2 receptors
Histamine H2 receptors "act via G-proteins to stimulate adenylate cyclase. Among the many responses mediated by these receptors are gastric acid secretion, smooth muscle relaxation, inotropic and chronotropic effects on heart muscle, and inhibition of lymphocyte function."[15]
Antagonists, such as ranitidine, are used to treat gastrointestinal disorder such as peptic ulcer disease and gastroesophageal reflux disease that are due to hyperacidity.
Histamine H3 receptors
Histamine H3 receptors were "first recognized as inhibitory autoreceptors on histamine-containing nerve terminals and have since been shown to regulate the release of several neurotransmitters in the central and peripheral nervous systems.[16]
Serotonin receptors
Serotonin is a "biochemical messenger and regulator, synthesized from the essential amino acid L-tryptophan. In humans it is found primarily in the central nervous system, gastrointestinal tract, and blood platelets. Serotonin mediates several important physiological functions including neurotransmission, gastrointestinal motility, hemostasis, and cardiovascular integrity."[12]
Serotonin receptors are "cell-surface proteins that bind serotonin and trigger intracellular changes which influence the behavior of cells. Several types of serotonin receptors have been recognized which differ in their pharmacology, molecular biology, and mode of action."[13]
Serotonin 5-HT1 receptors
Serotonin 5-HT2 receptors
Serotonin 5-HT3 receptors
Serotonin 5-HT4 receptors
References
- ↑ Anonymous. Biogenic amine receptors. National Library of Medicine. Retrieved on 2008-01-16.
- ↑ Anonymous. Receptors, Catecholamine. National Library of Medicine. Retrieved on 2008-01-16.
- ↑ Anonymous. Receptors, Adrenergic, alpha-1. National Library of Medicine. Retrieved on 2008-01-16.
- ↑ Anonymous. Receptors, Adrenergic, alpha-2. National Library of Medicine. Retrieved on 2008-01-16.
- ↑ Anonymous. Receptors, Adrenergic, beta-1. National Library of Medicine. Retrieved on 2008-01-16.
- ↑ Anonymous. Receptors, Adrenergic, beta-2. National Library of Medicine. Retrieved on 2008-01-16.
- ↑ Anonymous. Receptors, Adrenergic, beta-3. National Library of Medicine. Retrieved on 2008-01-16.
- ↑ Anonymous. Dopamine. National Library of Medicine. Retrieved on 2008-01-16.
- ↑ Anonymous. Receptors, Dopamine. National Library of Medicine. Retrieved on 2008-01-16.
- ↑ Anonymous. Dopamine D1 Receptors, Dopamine D1. National Library of Medicine. Retrieved on 2008-01-16.
- ↑ Anonymous. Dopamine D2 Receptors, Dopamine D2. National Library of Medicine. Retrieved on 2008-01-16.
- ↑ 12.0 12.1 Anonymous. Histamine. National Library of Medicine. Retrieved on 2008-01-16. Cite error: Invalid
<ref>tag; name "MeSH-serotonin" defined multiple times with different content - ↑ 13.0 13.1 Anonymous. Receptors, Histamine. National Library of Medicine. Retrieved on 2008-01-16. Cite error: Invalid
<ref>tag; name "MeSH-HistamineReceptors" defined multiple times with different content - ↑ Anonymous. Receptors, Histamine H1. National Library of Medicine. Retrieved on 2008-01-16.
- ↑ Anonymous. Receptors, Histamine H2. National Library of Medicine. Retrieved on 2008-01-16.
- ↑ Anonymous. Receptors, Histamine H3. National Library of Medicine. Retrieved on 2008-01-16.