5-HT Receptor Inhibitor

Ansofaxine hydrochloride (LY03005; LPM570065) is a triple reuptake inhibitor; inhibits serotonin, dopamine and norepinephrine reuptake with IC₅₀ values of 723, 491 and 763 nM, respectively.

Tetrahydro-β-carboline (Tryptoline) is a metabolite of tryptamine, also is a competitive serotonin reuptake inhibitor with an K_i value of 6.1 µM.

Viloxazine hydrochloride is a non-brain-penetrant, selective norepinephrine transporter (NET) inhibitor (IC₅₀=0.26 μM) and 5-HT receptor modulator. Viloxazine antagonizes 5-HT2B receptors (K_i=4.2 μM) and agonizes 5-HT2C receptors (EC₅₀=32 μM), respectively, and enhances 5-HT neurotransmission by modulating 5-HT2B/C receptors. Viloxazine also competitively inhibits NET from increasing NE and DA levels in the synaptic cleft, and can be used in the study of attention deficit hyperactivity disorder (ADHD).

Gentisein (NSC 329491), the major metabolite of Mangiferin, shows the most potent serotonin uptake inhibition with an IC₅₀ value of 4.7 µM.

TC-2153 is a selective inhibitor of striatal-enriched protein tyrosine phosphatase (STEP), with psychotropic activity and low acute toxicity. TC-2153 increases the expression of brain-derived neurotropic factor (BDNF) in the brain. And it decreases MAOA and 5-HT1A receptors mRNA level in midbrain. TC-2153 also inhibits 5-HT2A receptor-mediated signaling.

(E)-3,4,5-Trimethoxycinnamic acid (TMCA) is a cinnamic acid substituted by multi-methoxy groups. (E)-3,4,5-Trimethoxycinnamic acid is an orally active and potent GABA_A/BZ receptor agonist. (E)-3,4,5-Trimethoxycinnamic exhibits favourable binding affinity to 5-HT_2C and 5-HT_1A receptor, with IC₅₀ values of 2.5 and 7.6 μM, respectively. (E)-3,4,5-Trimethoxycinnamic acid shows anticonvulsant and sedative activity. (E)-3,4,5-Trimethoxycinnamic acid can be used for the research of insomnia, headache and epilepsy.

Melitracen hydrochloride is an orally active biphasic antidepressant and antianxiety agent. Melitracen hydrochloride can inhibit the uptake of Norepinephrine and 5-HT (serotonin) through the presynaptic membrane inducing the increase of monoamine transmitters in synaptic space.

Amitriptyline hydrochloride (Standard) is the analytical standard of Amitriptyline hydrochloride (HY-B0527A). This product is intended for research and analytical applications. Amitriptyline hydrochloride is an orally active tricyclic antidepressant (TCA). Amitriptyline hydrochloride mainly exerts its antidepressant effect by blocking SERT (K_i = 3.45 nM) and NET (K_i = 13.3 nM), thereby increasing the concentrations of 5-hydroxytryptamine (5-HT) and norepinephrine (NE) in the synaptic cleft. Amitriptyline hydrochloride is also an agonist at α2A and TrkA/TrkB receptors, thereby exerting analgesic and neurotrophic activities (inhibiting cell apoptosis). Amitriptyline hydrochloride can reduce inflammation, angiogenesis and fibrosis. Amitriptyline hydrochloride binds to DAT (with K_i = 2.58 μM). Amitriptyline hydrochloride has high affinity for a series of receptors and can antagonize muscarinic cholinergic receptors (M1/M2/M3/M4/M5 receptors) (K_i = 11-24 nM), H1 receptors (K_i = 0.5-1.1 nM), adrenergic α1 receptors (K_i = 4.4 nM), etc., resulting in a series of side effects. Amitriptyline hydrochloride can block sodium channels and hERG potassium channel (IC₅₀ = 4.78 μM) and it has cardiotoxicity.

Dothiepin (Dosulepin; Dothep) is an antidepressant agent with sedative/anxiolytic activity. Dothiepin is an inhibitor preferring of noradrenaline uptake than serotonin uptake. Dothiepin facilitates noradrenergic neurotransmission via inhibiting the neuronal uptake. Dothiepin is also an antagonist of histamine H1-receptor without cardiotoxicity. Dothiepin exhibits significant analgesic activity in psychogenic facial pain，idiopathic fibromyalgia syndrome or rheumatoid arthritis.

Jatrorrhizine hydroxide is an alkaloid isolated from Coptis chinensis with neuroprotective, antimicrobial, antiplasmodial and antioxidant activities. Jatrorrhizine hydroxide is a potent and orally active inhibitor of AChE (IC₅₀=872 nM) over >115-fold selectivity for BuChE. Jatrorrhizine hydroxide reduces uptake of serotonin (5-HT) and norepinephrine (NE) via inhibition of uptake-2 transporters.

Rodatristat ethyl (KAR5585) is a first-in-class oral tryptophan hydroxylase 1 (TPH1) Inhibitor with nanomolar in vitro potency. Rodatristat ethyl reduces the level of 5-HT and significantly reduces pulmonary arterial hypertension (PAH).

Lofepramine (Lopramine) is a modified tricyclic and orally active antidepressant. Lofepramine inhibits the uptake of Noradrenaline (NA) (HY-13715) and 5-hydroxytryptamine (5-HT) with IC₅₀s of 2.7 μM and 11 μM, respectively. Lofepramine exerts its antidepressant activity by promoting noradrenergic neurotransmission. Lofepramine also enhances serotonergic neurotransmission by inhibiting neuronal uptake of 5-HT and tryptophan pyrrolase. Lofepramine exhibits significant anxiolytic properties. .

Diclofensine (Ro 8-46500) hydrochloride is an orally active neuronal monoamine uptake inhibitor. Diclofensine hydrochloride blocks the uptake of dopamine, noradrenaline, and serotonin by rat brain synaptosomes with IC₅₀ values of 0.74, 2.3 and 3.7 nM, respectively. Diclofensine hydrochloride potentiates norepinephrine-induced hypertension and attenuates Tyramine (HY-W007606)-induced hypertension. Diclofensine hydrochloride produces psychostimulant and mood-elevating effects without causing sudden disappearance or withdrawal reactions. Diclofensine hydrochloride can be used in the research of moderate to severe depression.

Cyproheptadine hydrochloride sesquihydrate acts as a p38 MAP kinase activator, CHK2 activator, histamine H1 receptor inhibitor and serotonin receptor inhibitor. Cyproheptadine hydrochloride sesquihydrate mediates cell cycle arrest via G1 phase arrest, G1/S transition arrest, G0/G1 phase arrest, reduced expression of cyclins D1/D2/D3, upregulated expression of HBP1, p16, p21, p27, and decreased phosphorylation of retinoblastoma protein. Cyproheptadine hydrochloride sesquihydrate induces Apoptosis by increasing PARP and cleaved PARP, as well as activating the mitochondrial caspase pathway. Cyproheptadine hydrochloride sesquihydrate inhibits tumor growth with extremely low toxicity to normal cells. Cyproheptadine hydrochloride sesquihydrate can be used in research related to hepatocellular carcinoma, multiple myeloma and acute myeloid leukemia.

Isocorynoxeine, an isorhynchophylline-related alkaloid, exhibits a dose-dependent inhibition of 5-HT_2A receptor-mediated current response with an IC₅₀ of 72.4 μM.

Ampreloxetine (TD-9855) is a potent and orally active norepinephrine (NE) and serotonin 5-HT inhibitor. Ampreloxetine has the potential for the research of neurogenic orthostatic hypotension.

(R)-Citalopram oxalate, a R-(-) enantiomers of Citalopram (HY-121203), is a serotonin reuptake inhibitor. (R)-Citalopram oxalate is at least 20-fold weaker than S-citalopram (HY-14258) as inhibitor of the 5-HT transporter (SERT). (R)-Citalopram oxalate can be used for research of depression.

GM-60186 is a 5-HT receptor 2B (HTR2B) inhibitor with an IC₅₀ of 257 nM. GM-60186 significantly inhibits colorectal cancer proliferation and migration.

LY266097 hydrochloride is a selective 5-HT2B receptor antagonist with pK_is of 7.7, 9.8, and 7.6 for 5-HT2A, 5-HT2B, 5-HT2C, respectively. 5-HT2B receptor blockade contributes to the research in depression.

Paroxetine (BRL29060) (Standard) is the analytical standard of Paroxetine (HY-122272). This product is intended for research and analytical applications. Paroxetine (BRL29060) is an orally active and selective serotonin reuptake inhibitor (SSRI) and apoptosis inducer with blood-brain barrier permeability. Paroxetine inhibits nitric oxide synthase and CYP2D6, induces desensitization of 5-HT1A/1B/1D autoreceptors, downregulates 5-HT2 receptors, and promotes the production of inflammatory cytokines. Paroxetine is a weak norepinephrine (NE) uptake inhibitor and possesses antitumor activity. Paroxetine is widely used in research concerning depression, obsessive-compulsive disorder, panic disorder, social phobia, generalized anxiety disorder, post-traumatic stress disorder, premenstrual dysphoric disorder, hot flashes, and related conditions.