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Methiothepin
Metitepine (; developmental code names Ro 8-6837 (maleate), VUFB-6276 (mesylate)), also known as methiothepin, is a drug described as a " psychotropic agent" of the tricyclic or tetracyclic group which was never marketed. It acts as a non-selective antagonist of serotonin, dopamine, and adrenergic receptors, including of the serotonin 5-HT1, 5-HT2, 5-HT5, 5-HT6, and 5-HT7 receptors. The drug has antipsychotic properties. Pharmacology Pharmacodynamics Chemistry Analogues Metitepine is closely structurally related to certain other tetracyclic compounds including amoxapine, batelapine, clorotepine, clotiapine, clozapine, flumezapine, fluperlapine, loxapine, metiapine, olanzapine, oxyprothepin, perathiepin, perlapine, quetiapine Quetiapine ( ), sold under the brand name Seroquel among others, is an atypical antipsychotic medication used in the treatment of schizophrenia, bipolar disorder, bipolar depression, and major depressive disorder. Despite being wide ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
5-HT5B Receptor
5-HT5B receptor is a 5-HT receptor protein and the gene which encodes it. The protein is found in rodents, but not in humans, because stop codons in the gene's coding sequence prevent the gene from expressing a functional protein. It is believed that the function of the 5-HT5B receptor has been replaced in humans by some other subclass of 5-HT receptor. 5-HT5B receptor is a G protein-coupled receptor. 5-HT5B receptor mRNA is expressed primarily in the habenula, hippocampus and inferior olive of rat brains. Known agonists for 5-HT5B include ergotamine and LSD. Known antagonists include methiothepin Metitepine (; developmental code names Ro 8-6837 (maleate), VUFB-6276 (mesylate)), also known as methiothepin, is a drug described as a " psychotropic agent" of the tricyclic or tetracyclic group which was never marketed. It acts as a non-sele .... References Serotonin receptors {{transmembranereceptor-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
5-HT2B Receptor
5-Hydroxytryptamine receptor 2B (5-HT2B) also known as serotonin receptor 2B is a protein that in humans is encoded by the ''HTR2B'' gene. 5-HT2B is a member of the 5-HT2 receptor, 5-HT2 receptor family that binds the neurotransmitter serotonin (5-hydroxytryptamine, 5-HT). Like all 5-HT2 receptors, the 5-HT2B receptor is Gq protein, Gq/G11-protein coupled, leading to downstream activation of phospholipase C. Tissue distribution and function First discovered in the stomach of rats, 5-HT2B was challenging to characterize initially because of its structural similarity to the other 5-HT2 receptors, particularly 5-HT2C. The 5-HT2 receptors (of which the 5-HT2B receptor is a subtype) mediate many of the central and peripheral physiologic functions of serotonin. Cardiovascular effects include contraction of blood vessels and shape changes in platelets; central nervous system (CNS) effects include neuronal sensitization to tactile stimuli and mediation of some of the effects of halluci ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
5-HT1B Receptor
5-hydroxytryptamine receptor 1B also known as the 5-HT1B receptor is a protein that in humans is encoded by the ''HTR1B'' gene. The 5-HT1B receptor is a 5-HT receptor subtype. Tissue distribution and function 5-HT1B receptors are widely distributed throughout the central nervous system with the highest concentrations found in the frontal cortex, basal ganglia, striatum, and the hippocampus. The function of the 5-HT1B receptor differs depending upon its location. In the frontal cortex, it is believed to act as a terminal receptor inhibiting the release of dopamine. In the basal ganglia and the striatum, evidence suggests 5-HT signaling acts on an autoreceptor, inhibiting the release of serotonin and decreasing glutamatergic transmission by reducing miniature excitatory postsynaptic potential (mEPSP) frequency, respectively. In the hippocampus, a recent study has demonstrated that activation of postsynaptic 5-HT1B heteroreceptors produces a facilitation in excitatory synapt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maleate
Maleic acid or ''cis''-butenedioic acid is an organic compound that is a dicarboxylic acid, a molecule with two carboxyl groups. Its chemical formula is HO2CCH=CHCO2H. Maleic acid is the ''cis'' isomer of butenedioic acid, whereas fumaric acid is the ''trans'' isomer. Maleic acid is mainly used as a precursor to fumaric acid, and relative to its parent maleic anhydride, which has many applications. Etymology 'Maleic acid' from the French altered from , malic acid, from which it was synthesised. The word 'malic' is derived from Latin , meaning 'apple'. Physical properties Maleic acid has a heat of combustion of −1,355 kJ/mol., 22.7 kJ/mol higher than that of fumaric acid. Maleic acid is more soluble in water than fumaric acid. The melting point of maleic acid (135 °C) is also much lower than that of fumaric acid (287 °C). As confirmed by X-ray crystallography, maleic acid is planar. Two normal hydrogen bonds are observed, one intramolecular and one interm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Biological Target
A biological target is anything within a living organism to which some other entity (like an endogenous ligand or a drug) is directed and/or binds, resulting in a change in its behavior or function. Examples of common classes of biological targets are proteins and nucleic acids. The definition is context-dependent, and can refer to the biological target of a pharmacologically active drug compound, the receptor target of a hormone (like insulin), or some other target of an external stimulus. Biological targets are most commonly proteins such as enzymes, ion channels, and receptors. Mechanism The external stimulus (''i.e.'', the drug or ligand) physically binds to ("hits") the biological target. The interaction between the substance and the target may be: * noncovalent – A relatively weak interaction between the stimulus and the target where no chemical bond is formed between the two interacting partners and hence the interaction is completely reversible. * reversible c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
5-HT5A Receptor
5-Hydroxytryptamine (serotonin) receptor 5A, also known as HTR5A, is a protein that in humans is encoded by the ''HTR5A'' gene. Agonists and Receptor antagonist, antagonists for 5-HT receptors, as well as serotonin uptake inhibitors, present promnesic (memory-promoting) and/or anti-amnesic effects under different conditions, and 5-HT receptors are also associated with neural changes. Function The gene described in this record is a member of 5-HT receptor, 5-hydroxytryptamine receptor family and encodes a multi-pass membrane protein that functions as a receptor for 5-hydroxytryptamine and couples to G proteins, negatively influencing cAMP levels via Gi and Go. This protein has been shown to function in part through the regulation of intracellular Ca2+ mobilization. The 5-HT5A receptor has been shown to be functional in a native expression system. Rodents have been shown to possess two functional 5-HT5 receptor subtypes, 5-HT5A and 5-HT5B, however while humans possess a gene cod ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
5-HT4 Receptor
5-Hydroxytryptamine receptor 4 is a protein that in humans is encoded by the ''HTR4'' gene. Function This gene is a member of the family of human serotonin receptors, which are G protein-coupled receptors that stimulate cAMP production in response to serotonin (5-hydroxytryptamine). The gene product is a glycosylated transmembrane protein that functions in both the peripheral and central nervous system to modulate the release of various neurotransmitters. Multiple transcript variants encoding proteins with distinct C-terminal sequences have been described, but the full-length nature of some transcript variants has not been determined. Location The receptor is located in the alimentary tract, urinary bladder, heart and adrenal gland as well as the central nervous system (CNS). In the CNS the receptor appears in the putamen, caudate nucleus, nucleus accumbens, globus pallidus, and substantia nigra, and to a lesser extent in the neocortex, raphe, pontine nuclei, and some a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
5-HT3 Receptor
The 5-HT3 receptor belongs to the Cys-loop superfamily of ligand-gated ion channels (LGICs) and therefore differs structurally and functionally from all other 5-HT receptors (5-hydroxytryptamine, or serotonin receptors) which are G-protein-coupled receptor, G protein-coupled receptors. This ion channel is cation-selective and mediates neuronal depolarization and excitation within the Central nervous system, central and Peripheral nervous system, peripheral nervous systems. As with other ligand gated ion channels, the 5-HT3 receptor consists of five subunits arranged around a central ion conducting pore, which is permeable to sodium (Na), potassium (K), and calcium (Ca) ions. Binding of the neurotransmitter 5-hydroxytryptamine (serotonin) to the 5-HT3 receptor opens the channel, which, in turn, leads to an excitatory response in neurons. The rapidly activating, desensitizing, inward current is predominantly carried by sodium and potassium ions. 5-HT3 receptors have a negligible perme ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
5-HT2C Receptor
The 5-HT2C receptor is a subtype of the 5-HT2 receptor that binds the endogenous neurotransmitter serotonin (5-hydroxytryptamine, 5-HT). Like all 5-HT2 receptors, it is a G protein-coupled receptor (GPCR) that is coupled to Gq/G11 and mediates excitatory neurotransmission. ''HTR2C'' denotes the human gene encoding for the receptor, that in humans is located on the X chromosome. As males have one copy of the gene and females have one of the two copies of the gene repressed, polymorphisms at this receptor can affect the two sexes to differing extent. Structure At the cell surface the receptor exists as a homodimer. The crystal structure has been known since 2018. Distribution 5-HT2C receptors are located mainly in the choroid plexus, and in rats is also found in many other brain regions in high concentrations, including parts of the hippocampus, anterior olfactory nucleus, substantia nigra, several brainstem nuclei, amygdala, subthalamic nucleus and lateral habenula. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
5-HT2A Receptor
The 5-HT2A receptor is a subtype of the 5-HT2 receptor, 5-HT2 receptor that belongs to the serotonin receptor family and functions as a GPCR, G protein-coupled receptor (GPCR). It is a cell surface receptor that activates multiple intracellular signalling cascades. Like all 5-HT2 receptors, the 5-HT2A receptor is coupled to the Gq protein, Gq/G11 signaling pathway. It is the primary excitatory receptor subtype among the serotonin-responsive GPCRs. The 5-HT2A receptor was initially noted for its central role as the primary target of serotonergic psychedelic drugs such as LSD and psilocybin mushrooms. It later regained research prominence when found to mediate, at least in part, the effects of many antipsychotic drugs, particularly atypical antipsychotic, atypical antipsychotics. Downregulation of post-synaptic 5-HT2A receptors is an adaptive response triggered by chronic administration of selective serotonin reuptake inhibitors (SSRIs) and atypical antipsychotics. Elevated 5-HT2A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
5-HT1F Receptor
5-hydroxytryptamine (serotonin) receptor 1F, also known as HTR1F is a 5-HT1 receptor protein and also denotes the human gene encoding it. Agonists * 5-''n''-Butyryloxy-DMT: >60-fold selectivity versus 5-HT1E receptor * BRL-54443 - mixed 5-HT1E/1F agonist * Eletriptan - mixed 5-HT1B/1D/1E/1F/2B/7 agonist * LY-334,370 - as well as related benzamides * LY-344,864 (N- 3R)-3-(Dimethylamino)-2,3,4,9-tetrahydro-1H-carbazol-6-yl4-fluorobenzamide) * Naratriptan - mixed 5-HT1B/1D/1F agonist * Lasmiditan - selective 5-HT1F agonist, a first-in-class ditan molecule Antagonists MLS000756415 See also * 5-HT1 receptor * 5-HT receptor 5-HT receptors, 5-hydroxytryptamine receptors, or serotonin receptors, are a group of G protein-coupled receptor and ligand-gated ion channels found in multiple tissues including the Central nervous system, central and peripheral nervous systems ... References Further reading * * * * * * * * External links * * Sero ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
5-HT1E Receptor
5-hydroxytryptamine (serotonin) 1E receptor (5-HT1E) is a highly expressed human G-protein coupled receptor that belongs to the 5-HT1 receptor family (Gi-coupled serotonin receptor). The human gene is denoted as HTR1E. Function The function of the 5-HT1E receptor is unknown due to the lack of selective pharmacological tools, specific antibodies, and permissive animal models. The 5-HT1E receptor gene lacks polymorphisms amongst humans (few mutations), indicating a high degree of evolutionary conservation of genetic sequence, which suggests that the 5-HT1E receptor has an important physiological role in humans. It is hypothesized that the 5-HT1E receptor is involved in the regulation of memory in humans due to the high abundance of receptors in the frontal cortex, hippocampus, and olfactory bulb, all of which are regions of the brain integral to memory regulation. This receptor is unique among the serotonin receptors in that it is not known to be expressed by rats or mouse spec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
