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AS19 is a novel, highly potent and specific 5-HT7 serotonin receptor agonist with an IC50 value of 0.83 nM and a Ki of 0.6 nM. AS19 is specific for 5-HT7 over 5-HT1A, 5-HT1B, 5-HT1D, and 5-HT5A receptors (Kis = 89.7 nM, 490 nM, 6.6 nM and 98.5 nM, respectively). AS19 enhances memory consolidation and reverses Scopolamine- or Dizocilpine-induced amnesia.
| Targets |
Human 5-HT7 Receptor (IC50 = 0.83 nM); Human 5-HT7 Receptor (Ki = 0.6 nM) 5-HT1A Receptor (Ki = 89.7 nM); 5-HT1B Receptor (Ki = 490 nM); 5-HT1D Receptor (Ki = 6.6 nM); 5-HT5 Receptor (Ki = 98.5 nM)
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| ln Vitro |
After 48 hours, the addition of AS19 (1 μM) totally restored the proliferation of T cells treated with p-chlorophenylalanine, which had been severely reduced [2].
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| ln Vivo |
In an autoplastic Pavlovian/instrumental learning challenge, AS19 (0.5–10 mg/kg; subcutaneous injection; 24 hours duration; batch of Wistar stent) therapy enhances memory consolidation [1].
This work aimed to evaluate further the role of 5-HT7 receptors during memory formation in an autoshaping Pavlovian/instrumental learning task. Post-training administration of the potential 5-HT7 receptor agonist AS 19 or antagonist SB-269970 enhanced memory formation or had no effect, respectively. The AS 19 facilitatory effect was reversed by SB-269970, but not by the selective 5-HT1A antagonist WAY100635. Amnesia induced by scopolamine (cholinergic antagonist) or dizocilpine (NMDA antagonist) was also reversed by AS 19. Certainly, reservations regarding the selectivity of AS 19 for 5-HT7 and other 5-HT receptors in vivo are noteworthy and, therefore, its validity for use in animal models as a pharmacological tool. Having mentioned that, it should be noticed that together these data are providing further support to the notion of the 5-HT7 receptors role in memory formation. Importantly, this 5-HT7 receptor agonist AS 19 appears to represent a step forward respect to the notion that potent and selective 5-HT7 receptor agonists can be useful in the treatment of dysfunctional memory in aged-related decline and Alzheimer's disease[1]. |
| Enzyme Assay |
For the 5-HT(7) receptor agonists used, binding profile and intrinsic efficacy to stimulate cAMP formation in HEK-293F cells expressing the human 5-HT(7) receptor were also evaluated. AS-19 and E-55888 were selective for 5-HT(7) receptors. E-55888 was a full agonist whereas AS-19 and MSD-5a behaved as partial agonists, with maximal effects corresponding to 77% and 61%, respectively, of the cAMP response evoked by the full agonist 5-HT[3].
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| Animal Protocol |
Animal/Disease Models: Male Wistar rats (12-week old) with self-shaping Pavlovian/instrumental learning task [1]
Doses: 0.5 mg/kg, 1 mg/kg, 5 mg/kg, 10 mg/kg given Route of Administration: subcutaneous injection; 24 hrs (hrs (hours)) Experimental Results: Enhanced memory formation during automatic shaping Pavlovian/instrumental learning tasks. |
| References |
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| Additional Infomation |
This work aimed to evaluate the potential role of the 5-HT(7) receptor in nociception secondary to a sensitizing stimulus in mice. For this purpose, the effects of relevant ligands (5-HT(7) receptor agonists: AS-19, MSD-5a, E-55888; 5-HT(7) receptor antagonists: SB-258719, SB-269970; 5-HT(1A) receptor agonist: F-13640; 5-HT(1A) receptor antagonist: WAY-100635) were assessed on capsaicin-induced mechanical hypersensitivity, a pain behavior involving hypersensitivity of dorsal horn neurons (central sensitization). For the 5-HT(7) receptor agonists used, binding profile and intrinsic efficacy to stimulate cAMP formation in HEK-293F cells expressing the human 5-HT(7) receptor were also evaluated. AS-19 and E-55888 were selective for 5-HT(7) receptors. E-55888 was a full agonist whereas AS-19 and MSD-5a behaved as partial agonists, with maximal effects corresponding to 77% and 61%, respectively, of the cAMP response evoked by the full agonist 5-HT. Our in vivo results revealed that systemic administration of 5-HT(7) receptor agonists exerted a clear-cut dose-dependent antinociceptive effect that was prevented by 5-HT(7) receptor antagonists, but not by the 5-HT(1A) receptor antagonist. The order of efficacy (E-55888>AS-19>MSD-5a) matched their in vitro efficacy as 5-HT(7) receptor agonists. Contrary to agonists, a dose-dependent promotion of mechanical hypersensitivity was observed after administration of 5-HT(7) receptor antagonists, substantiating the involvement of the 5-HT(7) receptor in the control of capsaicin-induced mechanical hypersensitivity. These findings suggest that serotonin exerts an inhibitory role in the control of nociception through activation of 5-HT(7) receptors, and point to a new potential therapeutic use of 5-HT(7) receptor agonists in the field of analgesia.[3]
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| Molecular Formula |
C18H25N3
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|---|---|
| Molecular Weight |
283.411204099655
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| Exact Mass |
283.204
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| Elemental Analysis |
C, 76.28; H, 8.89; N, 14.83
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| CAS # |
1000578-26-6
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| PubChem CID |
23642275
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| Appearance |
Light yellow to brown ointment
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| Density |
1.1±0.1 g/cm3
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| Boiling Point |
413.3±45.0 °C at 760 mmHg
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| Flash Point |
203.7±28.7 °C
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| Vapour Pressure |
0.0±1.0 mmHg at 25°C
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| Index of Refraction |
1.595
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| LogP |
3.71
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| Hydrogen Bond Donor Count |
0
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| Hydrogen Bond Acceptor Count |
2
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| Rotatable Bond Count |
2
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| Heavy Atom Count |
21
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| Complexity |
356
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| Defined Atom Stereocenter Count |
1
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| SMILES |
CN(C)[C@H]1CCC2=C(C=CC=C2C3=C(C)N(C)N=C3C)C1
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| InChi Key |
BTTOYOKCLDAHHO-HNNXBMFYSA-N
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| InChi Code |
InChI=1S/C18H25N3/c1-12-18(13(2)21(5)19-12)17-8-6-7-14-11-15(20(3)4)9-10-16(14)17/h6-8,15H,9-11H2,1-5H3/t15-/m0/s1
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| Chemical Name |
1,2S,3,4-tetrahydro-N,N-dimethyl-5-(1,3,5-trimethyl-1H-pyrazol-4-yl)-2-naphthalenamine
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| Synonyms |
(2S)-(+)-5-(1,3,5-TRIMETHYLPYRAZOL-4-YL)-2-(DIMETHYLAMINO)TETRALIN; LA5AQ5R6QS; CHEMBL2164327; (2S)-N,N-dimethyl-5-(1,3,5-trimethyl-1H-pyrazol-4-yl)-1,2,3,4-tetrahydronaphthalen-2-amine;
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| HS Tariff Code |
2934.99.9001
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| Storage |
Powder -20°C 3 years 4°C 2 years In solvent -80°C 6 months -20°C 1 month |
| Shipping Condition |
Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)
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| Solubility (In Vitro) |
DMSO : ~100 mg/mL (~352.85 mM)
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| Solubility (In Vivo) |
Solubility in Formulation 1: ≥ 2.5 mg/mL (8.82 mM) (saturation unknown) in 10% DMSO + 40% PEG300 + 5% Tween80 + 45% Saline (add these co-solvents sequentially from left to right, and one by one), clear solution.
For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 400 μL PEG300 and mix evenly; then add 50 μL Tween-80 to the above solution and mix evenly; then add 450 μL normal saline to adjust the volume to 1 mL. Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH₂ O to obtain a clear solution. Solubility in Formulation 2: ≥ 2.5 mg/mL (8.82 mM) (saturation unknown) in 10% DMSO + 90% (20% SBE-β-CD in Saline) (add these co-solvents sequentially from left to right, and one by one), clear solution. For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 900 μL of 20% SBE-β-CD physiological saline solution and mix evenly. Preparation of 20% SBE-β-CD in Saline (4°C，1 week): Dissolve 2 g SBE-β-CD in 10 mL saline to obtain a clear solution. View More
Solubility in Formulation 3: ≥ 2.5 mg/mL (8.82 mM) (saturation unknown) in 10% DMSO + 90% Corn Oil (add these co-solvents sequentially from left to right, and one by one), clear solution. |
| Preparing Stock Solutions | 1 mg | 5 mg | 10 mg | |
| 1 mM | 3.5285 mL | 17.6423 mL | 35.2846 mL | |
| 5 mM | 0.7057 mL | 3.5285 mL | 7.0569 mL | |
| 10 mM | 0.3528 mL | 1.7642 mL | 3.5285 mL |
*Note: Please select an appropriate solvent for the preparation of stock solution based on your experiment needs. For most products, DMSO can be used for preparing stock solutions (e.g. 5 mM, 10 mM, or 20 mM concentration); some products with high aqueous solubility may be dissolved in water directly. Solubility information is available at the above Solubility Data section. Once the stock solution is prepared, aliquot it to routine usage volumes and store at -20°C or -80°C. Avoid repeated freeze and thaw cycles.
Calculation results
Working concentration： mg/mL；
Method for preparing DMSO stock solution： mg drug pre-dissolved in μL DMSO (stock solution concentration mg/mL). Please contact us first if the concentration exceeds the DMSO solubility of the batch of drug.
Method for preparing in vivo formulation:：Take μL DMSO stock solution, next add μL PEG300, mix and clarify, next addμL Tween 80, mix and clarify, next add μL ddH2O，mix and clarify.
(1) Please be sure that the solution is clear before the addition of next solvent. Dissolution methods like vortex, ultrasound or warming and heat may be used to aid dissolving.
(2) Be sure to add the solvent(s) in order.
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