D-Tubocurarine chloride pentahydrate is the chloride salt form of Tubocurarine, a nicotinic acetylcholine receptors (AChR) antagonist, and can be used as a skeletal muscle relaxant during surgery or mechanical ventilation. D-Tubocurarine chloride pentahydrate is also a potent neuromuscular blocking agent[1][2][3].
Clomipramine (Chlorimipramine) is a potent 5-HT reuptake blocker with the IC50 value of 1.5 nM. Clomipramine is a tricyclic antidepressant that can be used for the research of depression and obsessive compulsive disorder (OCD)[1].
SB-203186 hydrochloride is a potent and competitive 5-HT4 antagonist. SB-203186 hydrochloride antagonizes the 5-HT4 receptor-mediated relaxations of the carbachol-contracted rat isolated oesophagus against 5-HT with pKB values of 10.9 (rat oesophagus), 9.5 (guinea-pig ileum), and 9.0 (human colon) respectively[1][2][3].
R 59-022 (DKGI-I) hydrochloride is a DGK inhibitor (IC50: 2.8 µM). R 59-022 hydrochloride inhibits the phosphorylation of OAG to OAPA. R 59-022 hydrochloride is a 5-HT Receptor antagonist, and activates protein kinase C (PKC). R 59-022 hydrochloride potentiates thrombin-induced diacylglycerol production in platelets and inhibits phosphatidic acid production in neutrophils[1][2][3][4].
Biochanin A is a naturally occurring fatty acid amide hydrolase (FAAH) inhibitor, which inhibits FAAH with IC50s of 1.8, 1.4 and 2.4 μM for mouse, rat, and human FAAH, respectively.
Darifenacin HBr(UK88525) is a selective M3 muscarinic receptor antagonist with pKi of 8.9.IC50 value: 8.9 (pKi) [1]Target: M3 receptorin vitro: Darifenacin exerts non-parallel rightward displacement of the agonist curve and also significant depression of the maximum response (+)-cis-Dioxolane produced concentration-dependent contraction of the isolated bladder of rat [1]. Darifenacin produces a concentration dependent increase in R123 (P-gp probe) accumulation in MDCK cells. Darifenacin stimulates ATPase activity in P-gp membrane in a clear concentration dependent response manner with an estimated ED50 value of 1.6?μM. Darifenacin (100 nM) shows a significantly greater permeability for darifenacin in the basolateral to apical direction resulting in an efflux ratio in BBMEC monolayers of approximately 2.6 [2].in vivo: Darifenacin produces dose-dependent inhibition of amplitude of volume-induced bladder contractions(VIBCAMP), producing 35% inhibition at dose of 283.3 nmol/kg and maximal inhibition of approximately 50–55% [1]. Darifenacin (0.1 mg/kg i.v.) reduces bladder afferent activity in both Aδ and C fibers in female Sprague-Dawley rats, the decrease in afferent spikes in C fibers may be more pronounced than that in Aδ fibers [3].
Olanzapine D3 (LY170053 D3) is the deuterium labeled Olanzapine. Olanzapine is 5-HT2 and D1/D2 antagonist. Olanzapine is an antipsychotic agent with anticholinergic properties[1]. Olanzapine induces autophagy, mitochondrial damage and mitophagy in human SH-SY5Y neuronal cell line[2].
bPiDDB is a potent nAChR antagonist. bPiDDB potently (IC50=2 nM) inhibits nicotine-evoked striatal dopamine (DA) release through an interaction with α6β2-containing nAChRs[1].
Asimadoline is a potent κ opioid receptor agonist with IC50s of 5.6 and 1.2 nM for guinea pig and human recombinant κ opioid receptor, respectively.
4F 4PP (oxalate) is a selective 5-HT2A antagonist with almost as high affinity (Ki= 5.3 nM) as ketanserin but with a much lower affinity for 5-HT2C sites (Ki= 620 nM)[1][2][3][4].
MK-6884 is a M4 muscarinic receptor positive allosteric modulator (PAM) with a Ki value of 0.19 nM. MK-6884 can be used for the research of the neurodegenerative diseases. MK-6884 can be conveniently radiolabeled with carbon-11 and as a positron emission tomography (PET) imaging agent[1].
Aminooxyacetic acid hemihydrochloride is a malate-aspartate shuttle (MAS) inhibitor which also inhibits the GABA degradating enzyme GABA-T.
Dopamine D4 receptor antagonist-1 is a selective DRD4 antagonists, with a Ki of 9.0 nM for Hd4.2. Dopamine D4 receptor antagonist-1 can be used in study of schizophrenia[1].
(Rac)-WAY-161503 hydrochloride is a potent, selective, high affinity 5-HT2C receptor agonist with a Ki of 4 nM and an EC50 of 12 nM. (Rac)-WAY-161503 hydrochloride displays higher affinity for 5-HT2C than 5-HT2A and 5-HT2B receptors. (Rac)-WAY-161503 hydrochloride has anti-obesity and antidepressant effects[1][2].
Frovatriptan is a potent 5-HT1B//D receptor agonist and has the highest 5-HT1B potency in the triptan class. Frovatriptan is apparently cerebroselective. Frovatriptan is efficacious and even superior in some endpoints also when taken during the headache phase in migraine attacks with aura[1].
β-amyloid (12-28) is a 17-aa peptide fragment, which can produce amyloid aggregates, used in the research of Alzheimer’sdisease.
[Glp5] Substance P (5-11) is an octapeptide. [Glp5] Substance P (5-11) is one of the main substance P fragments in rat central nervous system (CNS). [Glp5] Substance P (5-11) locally modulates dopamine release in rat striatum[1].
CMPDA is a positive allosteric modulator of AMPA receptors with EC50s of 45.4 ± 4.2 nM/63.4 ± 5.6 nM for GluA2i/GluA2o receptor.IC50 value: 45.4 ± 4.2 nM/63.4 ± 5.6 nM(GluA2i/GluA2o) [1]Target: AMPAR modulatorCMPDA was nearly equipotent at modulating the two isoforms of GluA2 receptors, whereas CMPDB displayed a modest preference for the flip splice variant. Similar to CX614, CMPDA slowed the rate of deactivation of GluA2o receptors approximately 2-fold but had no effect on GluA2i receptor deactivation [1].
5-HT2B antagonist-1 is an orally active 5-HT2B receptor antagonist with an IC50 value of 33.4 nM. 5-HT2B antagonist-1 can be used in studies of diseases characterized by 5-HT2B receptor signaling, such as hepatocellular carcinoma, cardiovascular disease or gastrointestinal disease[1][2].
Etifoxine(HOE 36-801) is potentiator of GABAA receptor function in cultured neurons. Etifoxine preferentially acts on β2 or β3 subunit-containing GABAA receptors. IC50 value:Target: GABAA receptorEtifoxine exhibits anxiolytic activity in rodents and humans with no sedative, myorelaxant or mnesic side effects. Etifoxine acts as a ligand of the translocator protein (TSPO); promotes axonal regeneration.
Tropisetron is a selective 5-HT3 receptor antagonist and α7-nicotinic receptor agonist with an IC50 of 70.1 ± 0.9 nM for 5-HT3 receptor.IC50 value: 70.1 ± 0.9 nMTarget: 5-HT3 receptor; α7-nicotinic receptorin vitro: Retinal ganglion cells(RGCs) pretreated with 100 nM tropisetron before glutamate increased cell survival to an average of 105% compared to controls. Inhibition studies using the alpha7 nAChR antagonist, MLA (10 nM), support the hypothesis that tropisetron is an effective neuroprotective agent against glutamate-induced excitotoxicity; mediated by α7 nAChR activation. Tropisetron had no discernible effects on pAkt levels but significantly decreased p38 MAPK levels associated with excitotoxicity from an average of 15 ng/ml to 6 ng/ml [2]. Tropisetron, but not granisetron, significantly inhibits the phosphatase activity of calcineurin, over-expresses the CB(1) receptors at both transcriptional and protein levels, and reduces cAMP content in cerebellar granule neurons (CGNs) [4].in vivo: Animals were treated intracerebroventricularly with tropisetron, mCPBG (selective 5-HT3 receptor agonist) or mCPBG plus tropisetron on days 1, 3, 5 and 7. Tropisetron significantly diminished the elevated levels of these markers and reversed the cognitive deficit. Interestingly, tropisetron was also found to be a potent inhibitor of calcineurin phosphatase activity [1]. tropisetron (5mg/kg/day) plus mCPBG (10mg/kg/day), and granisetron (5mg/kg/day) intraperitoneally on days 3-35 post-immunization. Treatment with tropisetron and granisetron markedly suppressed the clinical symptoms of EAE (p<0.001) and reduced leukocyte infiltration as well as demyelination in the spinal cord (p<0.05) [3].
(R,R)-Reboxetine mesylate is an antidepressant agent with great bioavailability. (R,R)-Reboxetine is the enantiomer of Reboxetine, which is a selective noradrenaline reuptake inhibitor. Reboxetine consists of (R,R) and (S,S) enantiomer, has low affinity for alpha-adrenergic and muscarinic receptors and low toxicity in animals[1][2].
N-Despropyl Ropinirole (SKF-104557) is an active metabolite of the dopamine D2 receptor agonist Ropinirole (HY-B0623). N-Despropyl Ropinirole is a full agonist at human D2 and D3 receptors. N-Despropyl Ropinirole is a partial agonistof the hD4 receptor[1].
LY2365109 is a potent and selective GlyT1 inhibitors with IC50 value of 15.8 nM.target: GlyT1[1]IC 50: 15.8 nM [1]In vivo: The reference for LY2365109 is 0.3 or 30 mg/kg by PO. LY2365109 appeared slightly more potent than ALX5407 over the dose-range tested on CSF levels of glycine in the ratLY2365109 can act to potentiate NMDA function in the PFC but also mediate sustained inhibition of GlyT1 transporters in caudal areas of the brain.[1] LY2365109 increased seizure thresholds in mice. Importantly, chronic seizures in the mouse model of TLE were robustly suppressed by systemic administration of the GlyT1 inhibitor LY2365109. [2]
Cyproheptadine hydrochloride sesquihydrate is an antihistamine and is an antagonist of serotonin and histamine2.
Tiagabine hydrochloride hydrate is a potent and selective GABA uptake inhibitor, used as an anticonvulsant agent, with IC50s of 67, 446 and 182 nM for [3H]GABA uptake in Synaptosomes, Neurons and Glia, respectively[1].
Rilmenidine hemifumarate, an innovative antihypertensive agent, is an orally active, selective I1 imidazoline receptor agonist. Rilmenidine hemifumarate is an alpha 2-adrenoceptor agonist. Rilmenidine hemifumarate induces autophagy. Rilmenidine hemifumarate acts both centrally by reducing sympathetic overactivity and in the kidney by inhibiting the Na+/H+ antiport. Rilmenidine hemifumarate modulates proliferation and stimulates the proapoptotic protein Bax thus inducing the perturbation of the mitochondrial pathway and apoptosis in human leukemic K562 cells [1][2][3].
Flupentixol is a high potency thioxanthene with D1 and D2 dopamine receptor antagonism. Flupentixol is used in therapy of schizophrenia as well as in anxiolytic and depressive disorders[1][2].
Glycine is an inhibitory neurotransmitter in the CNS and also acts as a co-agonist along with glutamate, facilitating an excitatory potential at the glutaminergic N-methyl-D-aspartic acid (NMDA) receptors.
PNU-282987 is a selective α7 nicotinic acetylcholine receptor(α7 nAChR) agonist with Ki of 26 nM; no affinity for α1β1γδ and α3β4 nAChRs (IC50 ≥ 60 μM).IC50 value: 26 nM(Ki) [1]Target: α7 nAChR agonistin vitro: Treatment with PNU-282987 resulted in an attenuation of neuroinflammation in the MPTP-lesioned SN. Furthermore, PNU-282987 attenuated MPTP-induced dopaminergic cell loss in the SN and reduced striatal dopamine depletion [3].in vivo: Mice were subjected to 70% partial hepatic I/R for 60 min and pretreated with either vehicle or with PNU-282987, and blood and hepatic tissue samples were collected at 3, 6, and 12 h following reperfusion. pretreatment with PNU-282987 decreased serum transaminase levels and ameliorated liver injury after hepatic I/R. Moreover, pretreatment with PNU-282987 suppressed NF-κB activation, cytokine production (tumor necrosis factor α, interleukin 1β), and HMGB1 expression in liver after hepatic I/R [2]. Mice treated with 2.5 and 10 mg/kg of PNU devoted less time to rearing into open arms. In the HB task, MC mice displayed higher exploratory activity reflected in more head-dips (HD) during the first minute than EE and SE, whereas EE displayed low exploration levels reflected in total HD (5 min) [4].