Linopirdine dihydrochlorideKV7 (KCNQ) channel blocker CAS# 113168-57-3 |
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Quality Control & MSDS
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| Cas No. | 113168-57-3 | SDF | Download SDF |
| PubChem ID | 14209557 | Appearance | Powder |
| Formula | C26H23Cl2N3O | M.Wt | 464.39 |
| Type of Compound | N/A | Storage | Desiccate at -20°C |
| Synonyms | DuP 996 | ||
| Solubility | Soluble to 100 mM in water and to 100 mM in DMSO | ||
| Chemical Name | 1-phenyl-3,3-bis(pyridin-4-ylmethyl)indol-2-one;dihydrochloride | ||
| SMILES | C1=CC=C(C=C1)N2C3=CC=CC=C3C(C2=O)(CC4=CC=NC=C4)CC5=CC=NC=C5.Cl.Cl | ||
| Standard InChIKey | ZEVVHCGTTNRYOY-UHFFFAOYSA-N | ||
| Standard InChI | InChI=1S/C26H21N3O.2ClH/c30-25-26(18-20-10-14-27-15-11-20,19-21-12-16-28-17-13-21)23-8-4-5-9-24(23)29(25)22-6-2-1-3-7-22;;/h1-17H,18-19H2;2*1H | ||
| General tips | For obtaining a higher solubility , please warm the tube at 37 ℃ and shake it in the ultrasonic bath for a while.Stock solution can be stored below -20℃ for several months. We recommend that you prepare and use the solution on the same day. However, if the test schedule requires, the stock solutions can be prepared in advance, and the stock solution must be sealed and stored below -20℃. In general, the stock solution can be kept for several months. Before use, we recommend that you leave the vial at room temperature for at least an hour before opening it. |
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| About Packaging | 1. The packaging of the product may be reversed during transportation, cause the high purity compounds to adhere to the neck or cap of the vial.Take the vail out of its packaging and shake gently until the compounds fall to the bottom of the vial. 2. For liquid products, please centrifuge at 500xg to gather the liquid to the bottom of the vial. 3. Try to avoid loss or contamination during the experiment. |
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| Shipping Condition | Packaging according to customer requirements(5mg, 10mg, 20mg and more). Ship via FedEx, DHL, UPS, EMS or other couriers with RT, or blue ice upon request. | ||
| Description | Blocker of KV7 (KCNQ) voltage-gated potassium channels; blocks KV7.1+7.3 (KCNQ2+3) / M-currents (IC50 = 4 - 7 μM) and KV7.1 (KCNQ1) homomeric channels (IC50 = 8.9 μM). Augments hippocampal ACh release and is a cognitive enhancer following oral administration in vivo. |
Linopirdine dihydrochloride Dilution Calculator
Linopirdine dihydrochloride Molarity Calculator
| 1 mg | 5 mg | 10 mg | 20 mg | 25 mg | |
| 1 mM | 2.1534 mL | 10.7668 mL | 21.5336 mL | 43.0672 mL | 53.8341 mL |
| 5 mM | 0.4307 mL | 2.1534 mL | 4.3067 mL | 8.6134 mL | 10.7668 mL |
| 10 mM | 0.2153 mL | 1.0767 mL | 2.1534 mL | 4.3067 mL | 5.3834 mL |
| 50 mM | 0.0431 mL | 0.2153 mL | 0.4307 mL | 0.8613 mL | 1.0767 mL |
| 100 mM | 0.0215 mL | 0.1077 mL | 0.2153 mL | 0.4307 mL | 0.5383 mL |
| * Note: If you are in the process of experiment, it's necessary to make the dilution ratios of the samples. The dilution data above is only for reference. Normally, it's can get a better solubility within lower of Concentrations. | |||||
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Selectivity of linopirdine (DuP 996), a neurotransmitter release enhancer, in blocking voltage-dependent and calcium-activated potassium currents in hippocampal neurons.[Pubmed:9694925]
J Pharmacol Exp Ther. 1998 Aug;286(2):709-17.
Linopirdine [DuP 996, 3, 3-bis(4-pyridinylmethyl)-1-phenylindolin-2-one], a putative cognition enhancing drug, increases acetylcholine release in rat brain tissue and improves performance in animal models of learning and memory. The mechanism whereby linopirdine enhances acetylcholine release has been proposed to involve inhibition of the M-type K+ current (IM). Our study examines the selectivity of linopirdine for IM by determining its effects on other ionic currents present in rat hippocampal CA1 neurons using patch clamp techniques. Linopirdine was found to block voltage-gated, calcium-activated and leak K+ currents in a dose-dependent manner. Of the seven currents measured, linopirdine was most selective for IM with an IC50 of 2.4 +/- 0.4 microM, followed by IC (measured as a medium afterhyperpolarization tail current, ImAHP) with an IC50 of 16.3 +/- 2.4 microM. Both IM and IC were completely suppressed by linopirdine. At a concentration of 100 microM, linopirdine weakly inhibited the K+ leak current, IL, the transient outward current, IA, the delayed rectifier, IK, and the slow component of IAHP, by 28 +/- 8, 37 +/- 10, 36 +/- 9 and 52 +/- 10 percent, respectively. The mixed Na+/K+ inward rectifying current, IQ, was essentially unaffected by linopirdine (IC50 >300 microM). These results indicate that linopirdine selectively blocks IM at concentrations
KCNQ2 and KCNQ3 potassium channel subunits: molecular correlates of the M-channel.[Pubmed:9836639]
Science. 1998 Dec 4;282(5395):1890-3.
The M-current regulates the subthreshold electrical excitability of many neurons, determining their firing properties and responsiveness to synaptic input. To date, however, the genes that encode subunits of this important channel have not been identified. The biophysical properties, sensitivity to pharmacological blockade, and expression pattern of the KCNQ2 and KCNQ3 potassium channels were determined. It is concluded that both these subunits contribute to the native M-current.
Two new potent neurotransmitter release enhancers, 10,10-bis(4-pyridinylmethyl)-9(10H)-anthracenone and 10,10-bis(2-fluoro-4-pyridinylmethyl)-9(10H)-anthracenone: comparison to linopirdine.[Pubmed:9580619]
J Pharmacol Exp Ther. 1998 May;285(2):724-30.
Linopirdine (3,3-bis(4-pyridinylmethyl)-1-phenylindolin-2-one, DUP996) is an extensively studied representative of a class of cognition enhancing compounds that increase the evoked release of neurotransmitters. Recent studies suggest that these agents act through the blockade of specific K+ channels. We have recently identified more potent anthracenone analogs of linopirdine: 10,10-bis(4-pyridinylmethyl)-9(10H)-anthracenone (XE991) and 10,10-bis(2-fluoro-4-pyridinylmethyl)-9(10H)-anthracenone (DMP 543). Although linopirdine possesses an EC50 of 4.2 microM for enhancement of [3H]ACh release from rat brain slices, XE991 and DMP 543 have EC50S of 490 and 700 nM, respectively. In addition to greater in vitro potency relative to linopirdine, both compounds show greater in vivo potency and duration of action. Although 5 mg/kg (p.o.) linopirdine does not lead to statistically significant increases in hippocampal extracellular acetylcholine levels, 5 mg/kg (p.o.) XE991 leads to increases (maximal effect > 90% over baseline) which are sustained for 60 min. Moreover, DMP 543 at 1 mg/kg causes more than a 100% increase in acetylcholine levels with the effect lasting more than 3 hr. At doses relevant to their release-enhancing properties, the only overt symptom consistently observed was tremor, possible via a cholinergic mechanism. These results suggest that XE991 and DMP 543 may prove to be superior to linopirdine as Alzheimer's disease therapeutics. In addition, these agents should be useful pharmacological tools for probing the importance of particular ion channels in the control of neurotransmitter release.
