Pardoprunox hydrochloride is a novel partial dopamine D2 and D3 receptor agonist and serotonin 5-HT1A receptor agonist, D2 (pKi = 8.1) and D3 receptor (pKi = 8.6) partial agonist and 5-HT1A receptor (pKi = 8.5) full agonist.IC50 value: 8.1/8.6/8.5 (pKi, for D2/ D3/5-HT1A receptor)Target: dopamine D2 and D3 receptor, 5-HT1A receptorin vitro: Pardoprunox also binds to D4 (pKi = 7.8), α1-adrenergic (pKi = 7.8), α2-adrenergic (pKi = 7.4), and 5-HT7 receptors (pKi = 7.2) with lower affinity. Pardoprunox acts as a potent but partial D(2) receptor agonist (pEC50 = 8.0 and pA2 = 8.4) with an efficacy of 50% on forskolin stimulated cAMP accumulation. At human recombinant dopamine D3 receptors, Pardoprunox acts as a partial agonist in the induction of [35S]GTPgammaS binding (intrinsic activity of 67%; pEC(50) = 9.2) and antagonized the dopamine induction of [35S]GTPgammaS binding (pA2 = 9.0). Pardoprunox acts as a full 5-HT1A receptor agonist on forskolin induced cAMP accumulation at cloned human 5-HT1A receptors but with low potency (pEC50 = 6.3) [1].in vivo: Pardoprunox induces contralateral turning behaviour in rats with unilateral 6-hydroxydopamine-induced lesions of the substantia nigra pars compacta (SNpc) (MED=0.03mg/kg; po). In MPTP-treated common marmosets, Pardoprunox dose-dependently increases locomotor activity (MED=0.03mg/kg; po) and decreases motor disability (MED=0.03mg/kg; po). In contrast Pardoprunox attenuated novelty-induced locomotor activity (MED=0.01mg/kg; po), (+)-amphetamine-induced hyperlocomotion (MED=0.3mg/kg; po) and apomorphine-induced climbing (MED=0.6mg/kg; po) in rodents. Pardoprunox also induces 5-HT1A receptor-mediated behaviours, including flat body posture and lower lip retraction (MED=0.3mg/kg; po). Collectively, these findings demonstrate that Pardoprunox possesses dopamine D2/3 partial agonist effects, 5-HT1A agonist effects and reduces parkinsonism in animal models. functional D2 receptor partial agonist activity and is effective in experimental models predictive of efficacy in PD.[2]
Pipamperone (Floropipamide; McN-JR 3345; R 3345) is a high-affinity antagonist of 5-HT2A receptor (pKi=8.2) and D4 receptor (pKi=8.0) and a low-affinity antagonist of D2 receptor (pKi=6.7)[1].
Bopindolol ((±)-Bopindolol) malonate is an orally active antagonist of β-adrenoceptors (ARs) with partial agonist activity. Bopindolol malonate is non-selective for β1- and β2-ARs and has low affinity for β3-AR subtype. Bopindolol malonate has intrinsic sympathomimetic as well as membrane stabilizing actions, inhibits renin secretion, and interacts with 5-HT receptors. Bopindolol malonate is a prodrug of Pindolol (HY-B0982). Bopindolol malonate can be used for essential and renovascular hypertension research[1][2][3][4].
SCH 39166 hydrobromide (SCH391660) is potent and selective antagonist of dopamine D1/D5 receptor, with Kis of 1.2 nM and 2.0 nM, respectively. SCH 39166 hydrobromide shows more than 40-flod selectivity over D2, D4, 5-HT, and α2a receptor (Ki=0.98, 5.52, 0.08, and 0.73 μM, respectively). SCH 39166 hydrobromide can be used for the research of schizophrenia, cocaine addition, and obesity[1].
Levemopamil hydrochloride is a blood-brain barrier penetrable calcium channel blocker and a 5-HT2 antagonist. Levemopamil hydrochloride can be used for temporary occlusion and neurological disease research[1].
Dehydroaripiprazole-d8-1 is the deuterium labeled Dehydroaripiprazole. Dehydroaripiprazole (OPC-14857) is an active metabolite of Aripiprazole. Aripiprazole is an antipsychotic agent and is metabolized by CYP3A4 and CYP2D6 forming mainly Dehydroaripiprazole. Dehydroaripiprazole has with antipsychotic activity equivalent to Aripiprazole[1] [2] [3] [4] .
GSK163090 is a potent, selective, and orally active 5-HT1A/B/D receptor antagonist with pKi of 9.4/8.5/9.7, and 6.3/6.7 for 5-HT1A/B/D, and dopamine D2/D3, respectively.IC50 value: 9.4/8.5/9.7 (pKi) [1]Target: 5-HT in vitro: GSK163090 demonstrates clear dose-dependent inhibition of the 8-OH-DPAT-induced hyperlocomotor activity (hLMA), with ED50 values ranging from 0.03 to 1 mg/kg. GSK163090 was devoid of agonist activity at R1 receptors, but rather it demonstrated amoderate functional antagonismof the phenylephrineinduced contraction of rabbit aorta (pIC50=6.9). [1]in vivo: Fromamong these analogues, the cyclic urea derivative, GSK163090, emerged due to its low hERG affinity and excellent in vitro DMPK profile. The superior quality of GSK163090 was further highlighted by its commendable in vivo pharmacokineticprofile in rat and its outstanding activity in the 5-HT1A PD model, where 50% efficacy was achieved at a blood concentration of 3 ng/mL. On the basis of these results and its promising preclinical developability profile, GSK163090 was selected as an appropriate development candidate for progression toward clinical proof-of-concept studies. [1]
Pardoprunox(SLV-308) is a novel partial dopamine D2 and D3 receptor agonist and serotonin 5-HT1A receptor agonist; D2 (pKi = 8.1) and D3 receptor (pKi = 8.6) partial agonist (IA = 50% and 67%, respectively) and 5-HT1A receptor (pKi = 8.5) full agonist (IA = 100%); also binds to D4 (pKi = 7.8), α1-adrenergic (pKi = 7.8), α2-adrenergic (pKi = 7.4), and 5-HT7 receptors (pKi = 7.2) with lower affinity.IC50 value:Target:in vitro: SLV308 acted as a potent but partial D(2) receptor agonist (pEC(50) = 8.0 and pA(2) = 8.4) with an efficacy of 50% on forskolin stimulated cAMP accumulation. At human recombinant dopamine D(3) receptors, SLV308 acted as a partial agonist in the induction of [(35)S]GTPgammaS binding (intrinsic activity of 67%; pEC(50) = 9.2) and antagonized the dopamine induction of [(35)S]GTPgammaS binding (pA(2) = 9.0). SLV308 acted as a full 5-HT(1) (A) receptor agonist on forskolin induced cAMP accumulation at cloned human 5-HT(1) (A) receptors but with low potency (pEC(50) = 6.3) [1].in vivo: Unified PD Rating Scale (UPDRS)-Motor score was improved in pardoprunox-treated patients (overall mean dose 23.8 mg/d; -7.3 points), as compared with placebo (-3.0 points; P = 0.0001), from baseline to end point. At end point, there were more responders (> or = 30% reduction in UPDRS-Motor score) in the pardoprunox group (50.7%) than in the placebo group (15.7%; P < 0.0001) [2]. Surprisingly in the SNc, pardoprunox (10 μg kg?1, i.v.) either partially or fully suppressed the firing activity in two separate populations of DA neurons. Finally, in the DRN, pardoprunox (5-40 μg kg-1, i.v.) completely suppressed the firing activity of 5-HT neurons. Moreover, the selective 5-HT(1A) receptor antagonist WAY-100,635 prevented and reversed the effects of pardoprunox [3].
Ritanserin (R 55667) is a highly potent, relatively selective, orally active, long acting antagonist of 5-HT2 receptor, with an IC50 of 0.9 nM, less active on Histamine H1, Dopamine D2, Adrenergic α1, Adrenergic α2 receptors[1].
Osemozotan hydrochloride (MKC242) is a selective 5-HT1A receptor agonist. Osemozotan hydrochloride decreases the number of c-Fos-positive cells caused by MAMP in mice. Osemozotan hydrochloride can be used for the research of depressive disorder[1][2].
5-HT3-In-1 is extracted from patent EP0748807A1, compound example 8. It shows 5-HT3 inhibition activity.
Nefazodone is an orally active phenylpiperazine antidepressant. Nefazodone can potently and selectively block postsynaptic 5-HT2A receptors, and moderately inhibit 5-HT and noradrenaline reuptake. Nefazodone can also relieve the adverse effects of stress on the the immune system of mice. Nefazodone has a high affinity for CYP3A4 isoenzyme, which indicates that it has certain risk of drug-drug interaction[1][2][3].
B-HT 920(Talipexole 2Hcl) is a dopamine D2 receptor agonist, α2-adrenoceptor agonist and 5-HT3 receptor antagonist, which displays antiParkinsonian activity.IC50 Value: 25 nM(Adrenergic receptor α-2, rat)Target: Adrenergic Receptor; 5-HT Receptor; Dopamine Receptorin vitro: N/Ain vivo: Intravenous injection of 30 micrograms/kg of B-HT 920 into cats lead initially to an increase in blood pressure and then to a long-lasting decrease in blood pressure and heart rate. Vagally mediated reflex bradycardia elicited by angiotensin injection in beta-adrenoceptor-blocked dogs was facilitated by intracisternal injection of 10 micrograms/kg B-HT 920.
Fabesetron (FK1052) is an orally active 5-HT3 receptor antagonist with 5-HT4 receptor antagonistic activity. Fabesetron (FK1052) can be used in the study for both acute and delayed emesis induced by cancer chemotherapy[1][2].
PNU-96415E is a selective D4/5-HT2A antagonist. PNU-96415E may have potential antipsychotic efficacy[1].
(S)-Mirtazapine ((S)-Org3770) is a S(+)-enantiomer of Mirtazapine with pronociceptive properties in an animal model of acute thermal nociception. (S)-Mirtazapine is a stereoselective 5-HT2 receptor antagonist. (S)-Mirtazapine is metabolized by CYP2D6 and CYP1A2[1].
Indisetron dihydrochloride is a 5-HT3 receptor antagonist with anti-emetic activity.
Eltoprazine(DU28853) is a serenic or antiaggressive agent which as an agonist at the 5-HT1A and 5-HT1B receptors and as an antagonist at the 5-HT2C receptor.IC50 value:Target: 5-HT1A/1B agonist; 5-HT2C antagonistin vitro: The binding of [3H]eltoprazine to whole tissue sections was saturable and revealed an apparent dissociation constant (Kd) of 11 nM. Specific [3H]eltoprazine binding was completely displaced by 5-HT; conversely, unlabelled eltoprazine reduced [3H]5-HT binding to the levels of non-specific binding [1]. Eltoprazine evoked membrane changes that were similar to but much weaker than those induced by 5HT. Both the 5HT- and eltoprazine-evoked membrane hyperpolarizations were largely suppressed in the presence of spiperone [2].in vivo: eltoprazine is extremely effective in suppressing dyskinesia in experimental models, although this effect was accompanied by a partial worsening of the therapeutic effect of l-dopa. Interestingly, eltoprazine was found to (synergistically) potentiate the antidyskinetic effect of amantadine. The current data indicated that eltoprazine is highly effective in counteracting dyskinesia in preclinical models [3]. Rats were chronically treated with mianserin (10 mg/kg i.p.) or eltoprazine (1 mg/kg i.p.) and were tested in the elevated plus-maze test for anxiety. Mianserin and eltoprazine displayed opposite effects in the elevated plus-maze: mianserin induced anxiolytic-like effects, while eltoprazine showed anxiogenic-like ones [4].
YM348 is a potent and orally active 5-HT2C receptor agonist, which shows a high affinity for cloned human 5-HT2C receptor (Ki: 0.89 nM).
LY310762 is a 5-HT1D receptor antagonist with Ki of 249 nM, having a weaker affinity for 5-HT1B receptor.IC50 value: 249 nM (Ki) [1]Target: 5-HT1D in vitro: LY310762 has a higher affinity for the guinea pig 5-HT1D receptor than for the 5-HT1B receptor. LY310762 potentiates the potassium-induced [3H]5-HT outflow from guinea pig cortical slices with an EC50 of 30 nM. The maximum potentiation of the potassium-induced outflow which is obtained with LY310762 is about 40% [1]. LY310762 blocks the decreased EPSC amplitude induced by Sumatriptan [2]. in vivo: Systemic administration of LY310762 (10 mg/kg i.p.) produces a further significant enhancement in the 5-HT response to fluoxetine (20 mg/kg i.p.) when compared to animals receiving a control vehicle injection. In fluoxetine treated animals, levels of 5-HT increases from 312±43% to a maximum of 683% after LY310762. In control animals, levels of 5-HT remains unchanged (250%). LY310762 administered alone also significantly increases basal levels of 5-HT above vehicle controls, reaching a maximum of 258% compared to the pre-injection control [1].
ST1936 oxalate is a selective, nanomolar affinity 5-HT6 receptor agonist with Ki values of 13 nM, 168 nM and 245 nM for human 5-HT6, 5-HT7 and 5-HT2B receptors, respectively. ST1936 oxalate also shows moderate affinity (Ki of 300 nM) for human α2 adrenergic receptor[1].
Naftidrofuryl is a drug used in the management of peripheral and cerebral vascular disorders as a vasodilator, enhance cellular oxidative capacity, and may also be a 5-HT2 receptor antagonist.Target: 5-HT2 receptorNaftidrofuryl may be effective for relieving the pain of muscle cramps.[1]Naftidrofuryl oxalate is the only vasoactive drug for peripheral arterial disease (PAD) which is likely to be cost-effective.[2]Naftidrofuryl oxalate is ranked first for both maximum walking distance (MWD) and pain-free walking distance (PFWD) (probability of 0·947 and 0·987, respectively, of being the best treatment) followed by cilostazol and pentoxifylline. Naftidrofuryl oxalate is effective treatments for claudication, Naftidrofuryl oxalate is likely to be the most effective, with minimal serious adverse events.[3]
SB269970 is a 5-HT7 receptor antagonist with pKi of 8.3, exhibits >50-fold selectivity against other receptors.IC50 Value: 8.3 (pKi for 5-HT7) [1]Target: 5-HT7 receptorin vitro: 5-CT-stimulated adenylyl cyclase activity in guinea-pig hippocampal membranes (pEC(50) of 8.4+/-0.2) was inhibited by SB-269970-A (0.3 microM) with a pK(B) (8.3+/-0.1) in good agreement with its antagonist potency at the human cloned 5-HT(7(a)) receptor and its binding affinity at guinea-pig cortical membranes. 5-HT(7) receptor mRNA was highly expressed in human hypothalamus, amygdala, thalamus, hippocampus and testis [1]. Cortical slices were loaded with [(3)H]-5-HT and release was evoked by electrical stimulation. 5-CT inhibited the evoked release of [(3)H]-5-HT in a concentration-dependent manner. SB-269970 had no significant effect on [(3)H]-5-HT release while the 5-HT(1B) receptor antagonist, SB-224289 significantly potentiated [(3)H]-5-HT release. In addition, SB-269970 was unable to attenuate the 5-CT-induced inhibition of release while SB-224289 produced a rightward shift of the 5-CT response, generating estimated pK(B) values of 7.8 and 7.6 at the guinea-pig and rat terminal 5-HT autoreceptors respectively [2].in vivo: Acute administration of SB-269970 (1 mg/kg) or amisulpride (3 mg/kg) ameliorated ketamine-induced cognitive inflexibility and novel object recognition deficit in rats. Both compounds were also effective in attenuating ketamine-evoked disruption of social interactions [3]. Pretreatment with a dose of SB-269970 (0.5 mM) that significantly affects sleep variables antagonized the LP-44 (2.5 mM)-induced suppression of REMS and of the number of REM periods [4].Toxicity: N/AClinical trial: N/A
Pimavanserin is a selective inverse agonist of the 5-HT2A receptor with pIC50 and pKd of 8.73 and 9.3, respectively.
PU02, a derivative of 6-MP (HY-13677), is a negative allosteric modulator (NAM) of 5-HT3 receptor, with IC50 values of 0.36 and 0.73 μM in HEK293 cells transfected with human 5-HT3A and 5-HT3AB receptors respectively[1][2].
Tandospirone(SM-3997) is a potent and selective 5-HT1A receptor partial agonist (Ki = 27 nM) that displays selectivity over SR-2, SR-1C, α1, α2, D1 and D2 receptors (Ki values ranging from 1300-41000 nM). IC50 Value: 27±5 nM(Ki) [1]Target: 5-HT1Ain vitro: Tandospirone is most potent at the 5-HT1A receptor, displaying a Ki value of 27 +/- 5 nM. The agent is approximately two to three orders of magnitude less potent at 5-HT2, 5-HT1C, alpha 1-adrenergic, alpha 2-adrenergic, and dopamine D1 and D2 receptors (Ki values ranging from 1300 to 41000 nM). Tandospirone is essentially inactive at 5-HT1B receptors; 5-HT uptake sites; beta-adrenergic, muscarinic cholinergic, and benzodiazepine receptors [1]. 3H-SM-3997 bound rapidly, reversibly and in a saturable manner with high affinity to rat brain hippocampal membranes (Kd = 9.4 nM, Bmax = 213 fmol/mg protein) [2]. in vivo: Chronic treatment with tandospirone, at 0.2 and 1.0mg/kg/day, but not 2.0mg/kg/day, attenuated footshock stress-induced eLAC elevation in the mPFC [3]. Rats were acutely administered tandospirone (0, 0.1, and 1 mg/kg, i.p.). Tandospirone decreased the number of premature responses, an index of impulsive action, in a dose-dependent manner [4].Toxicity: It is not believed to be addictive but it is known to produce mild withdrawal effects (e.g. anorexia) after abrupt discontinuation.
GR 113808 is a potent and highly selective 5-HT4 receptor antagonist (pKb= 8.8). GR 113808 shows 300-fold selectivity over 5-HT1A, 5-HT1B, 5-HT2A, 5-HT2C and 5-HT3 receptors[1].
Asenapine maleate is a 5-HT (1A, 1B, 2A, 2B, 2C, 5A, 6, 7) and D2 antagonist with Ki values of 0.03-4.0 nM, 1.3nM, respectively, and an antipsychotic.
SEP-363856 （SEP-856）, an orally active and CNS active psychotropic agent with a unique, non-D2/5-HT2A mechanism of action, exerts its antipsychotic-like effects. SEP-363856 （SEP-856） has the potential for the treatment of schizophrenia[1].
5-HT2A&5-HT2C agonist-1 (Example 2) is a 5-HT2A & 5-HT2C agonist, with IC50s of 196 nM and 0.9 nM respectively. 5-HT2A&5-HT2C agonist-1 can be used for research of depression, alcoholism, tobacco and cocaine addiction, inflammation, cluster headache, PTSD, seizure disorders and other CNS disorders[1].