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NAB-14

Cat No.:V10681 Purity: ≥98%
NAB-14 is a potent, selective, orally bioactive and noncompetitive GluN2C/2D antagonist (inhibitor) with IC50 of 580 nM for GluN1/GluN2D.
NAB-14
NAB-14 Chemical Structure CAS No.: 1237541-73-9
Product category: New1
This product is for research use only, not for human use. We do not sell to patients.
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Product Description
NAB-14 is a potent, selective, orally bioactive and noncompetitive GluN2C/2D antagonist (inhibitor) with IC50 of 580 nM for GluN1/GluN2D. NAB-14 is 800-fold more selective for recombinant GluN2C and GluN2D than GluN2A and GluN2B. NAB-14 can cross the BBB (blood-brain barrier).
Biological Activity I Assay Protocols (From Reference)
ln Vitro
Compound 14 (NAB-14) has an IC50 of 15 µM and 5.1 µM, respectively, which inhibits the GluN1/2AC1/2CC2 and GluN1/2AC1/2CC2 receptors [1]. Although native GluN2A or GluN2B-containing NMDARs in cultured cortical neurons are unaffected by NAB-14 (20 µM; 24 hours), it inhibits native GluN2D-containing receptors in brain slices [1]. The evoked EPSCs' peak amplitude is reduced to 55 ± 3.0% and the τW of EPSC inactivation is dramatically decreased by NAB-14 (10 µM) [1]. The amount of NAB-14 (10 µM) that decreased the interneuron EPSCs' peak amplitude and charge transfer to 59 ± 9.9% and 63 ± 9.7%, respectively. NAB-14 lowers interneuron EPSCs' τW from 150 ± 12 ms to 101 ± 14 ms[1].
ln Vivo
NAB-14 (20 mg/kg; oral) causes a significant systemic exposure; in mice and rats, peak brain free concentrations are 3.2 and 3.8 nM, respectively [1].
Animal Protocol
Animal/Disease Models: Mice and rats [1]
Doses: 20 mg/kg
Route of Administration: Oral
Experimental Results: Demonstrated high systemic exposure, with peak intracerebral peaks of 3.2 and 3.8 nM in mice and rats, respectively.
References

[1]. A Novel Negative Allosteric Modulator Selective for GluN2C/2D-Containing NMDA Receptors Inhibits Synaptic Transmission in Hippocampal Interneurons. ACS Chem Neurosci. 2018 Feb 21;9(2):306-319.

These protocols are for reference only. InvivoChem does not independently validate these methods.
Physicochemical Properties
Molecular Formula
C20H21N3O3
Molecular Weight
351.399044752121
Exact Mass
351.158
CAS #
1237541-73-9
PubChem CID
46862257
Appearance
White to off-white solid powder
LogP
3.4
Hydrogen Bond Donor Count
2
Hydrogen Bond Acceptor Count
3
Rotatable Bond Count
6
Heavy Atom Count
26
Complexity
487
Defined Atom Stereocenter Count
0
SMILES
O(C1C=CC(=CC=1)C(NC1=CC=CC2C=CNC=21)=O)C(N(CC)CC)=O
InChi Key
WCGIKJOMEYPSIP-UHFFFAOYSA-N
InChi Code
InChI=1S/C20H21N3O3/c1-3-23(4-2)20(25)26-16-10-8-15(9-11-16)19(24)22-17-7-5-6-14-12-13-21-18(14)17/h5-13,21H,3-4H2,1-2H3,(H,22,24)
Chemical Name
[4-(1H-indol-7-ylcarbamoyl)phenyl] N,N-diethylcarbamate
HS Tariff Code
2934.99.9001
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)
Solubility Data
Solubility (In Vitro)
May dissolve in DMSO (in most cases), if not, try other solvents such as H2O, Ethanol, or DMF with a minute amount of products to avoid loss of samples
Solubility (In Vivo)
Note: Listed below are some common formulations that may be used to formulate products with low water solubility (e.g. < 1 mg/mL), you may test these formulations using a minute amount of products to avoid loss of samples.

Injection Formulations
(e.g. IP/IV/IM/SC)
Injection Formulation 1: DMSO : Tween 80: Saline = 10 : 5 : 85 (i.e. 100 μL DMSO stock solution 50 μL Tween 80 850 μL Saline)
*Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH ₂ O to obtain a clear solution.
Injection Formulation 2: DMSO : PEG300Tween 80 : Saline = 10 : 40 : 5 : 45 (i.e. 100 μL DMSO 400 μLPEG300 50 μL Tween 80 450 μL Saline)
Injection Formulation 3: DMSO : Corn oil = 10 : 90 (i.e. 100 μL DMSO 900 μL Corn oil)
Example: Take the Injection Formulation 3 (DMSO : Corn oil = 10 : 90) as an example, if 1 mL of 2.5 mg/mL working solution is to be prepared, you can take 100 μL 25 mg/mL DMSO stock solution and add to 900 μL corn oil, mix well to obtain a clear or suspension solution (2.5 mg/mL, ready for use in animals).
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Injection Formulation 4: DMSO : 20% SBE-β-CD in saline = 10 : 90 [i.e. 100 μL DMSO 900 μL (20% SBE-β-CD in saline)]
*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.
Injection Formulation 5: 2-Hydroxypropyl-β-cyclodextrin : Saline = 50 : 50 (i.e. 500 μL 2-Hydroxypropyl-β-cyclodextrin 500 μL Saline)
Injection Formulation 6: DMSO : PEG300 : castor oil : Saline = 5 : 10 : 20 : 65 (i.e. 50 μL DMSO 100 μLPEG300 200 μL castor oil 650 μL Saline)
Injection Formulation 7: Ethanol : Cremophor : Saline = 10: 10 : 80 (i.e. 100 μL Ethanol 100 μL Cremophor 800 μL Saline)
Injection Formulation 8: Dissolve in Cremophor/Ethanol (50 : 50), then diluted by Saline
Injection Formulation 9: EtOH : Corn oil = 10 : 90 (i.e. 100 μL EtOH 900 μL Corn oil)
Injection Formulation 10: EtOH : PEG300Tween 80 : Saline = 10 : 40 : 5 : 45 (i.e. 100 μL EtOH 400 μLPEG300 50 μL Tween 80 450 μL Saline)


Oral Formulations
Oral Formulation 1: Suspend in 0.5% CMC Na (carboxymethylcellulose sodium)
Oral Formulation 2: Suspend in 0.5% Carboxymethyl cellulose
Example: Take the Oral Formulation 1 (Suspend in 0.5% CMC Na) as an example, if 100 mL of 2.5 mg/mL working solution is to be prepared, you can first prepare 0.5% CMC Na solution by measuring 0.5 g CMC Na and dissolve it in 100 mL ddH2O to obtain a clear solution; then add 250 mg of the product to 100 mL 0.5% CMC Na solution, to make the suspension solution (2.5 mg/mL, ready for use in animals).
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Oral Formulation 3: Dissolved in PEG400
Oral Formulation 4: Suspend in 0.2% Carboxymethyl cellulose
Oral Formulation 5: Dissolve in 0.25% Tween 80 and 0.5% Carboxymethyl cellulose
Oral Formulation 6: Mixing with food powders


Note: Please be aware that the above formulations are for reference only. InvivoChem strongly recommends customers to read literature methods/protocols carefully before determining which formulation you should use for in vivo studies, as different compounds have different solubility properties and have to be formulated differently.

 (Please use freshly prepared in vivo formulations for optimal results.)
Preparing Stock Solutions 1 mg 5 mg 10 mg
1 mM 2.8458 mL 14.2288 mL 28.4576 mL
5 mM 0.5692 mL 2.8458 mL 5.6915 mL
10 mM 0.2846 mL 1.4229 mL 2.8458 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.

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An example of molarity calculation using the molarity calculator is shown below:
What is the mass of compound required to make a 10 mM stock solution in 5 ml of DMSO given that the molecular weight of the compound is 350.26 g/mol?
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  • The answer of 17.513 mg appears in the Mass box. In a similar way, you may calculate the volume and concentration.

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What volume of a given 10 mM stock solution is required to make 25 ml of a 25 μM solution?
Using the equation C1V1 = C2V2, where C1=10 mM, C2=25 μM, V2=25 ml and V1 is the unknown:
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  • The answer of 62.5 μL (0.1 ml) appears in the Volume (Start) box
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Molecular Weight Calculator allows you to calculate the molar mass and elemental composition of a compound, as detailed below:

Note: Chemical formula is case sensitive: C12H18N3O4  c12h18n3o4
Instructions to calculate molar mass (molecular weight) of a chemical compound:
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Definitions of molecular mass, molecular weight, molar mass and molar weight:
  • Molecular mass (or molecular weight) is the mass of one molecule of a substance and is expressed in the unified atomic mass units (u). (1 u is equal to 1/12 the mass of one atom of carbon-12)
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In vivo Formulation Calculator (Clear solution)
Step 1: Enter information below (Recommended: An additional animal to make allowance for loss during the experiment)
Step 2: Enter in vivo formulation (This is only a calculator, not the exact formulation for a specific product. Please contact us first if there is no in vivo formulation in the solubility section.)
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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.

Biological Data
  • NAB-14 is a GluN2C/2D-selective NMDAR antagonist. The chemical structures are shown for (a) compound 1, (b) the regions evaluated in the NAB series structure-activity relationship, and (c) NAB-14. (d) Current responses to maximal concentrations of glutamate (100 μM) and glycine (30 μM) co-applied with increasing concentrations of NAB-14 were recorded by two-electrode voltage-clamp (TEVC) in Xenopus oocytes expressing GluN1 and GluN2A, GluN2B, GluN2C, or GluN2D. (e) Concentration-response data for NAB-14 were plotted as the percent of the maximal response to glutamate and glycine (mean ± s.e.m.) and fit by the Hill equation. (f) Representative current responses to 100 μM glutamate and 30 μM glycine co-applied with increasing concentrations of NAB-14 are shown for Xenopus oocytes expressing GluN1 and wild type (WT) GluN2C, GluN2CC1/2CC2, GluN2AC1/2CC2, or GluN2AC1/2AC2. (g) Concentration-response data for NAB-14 were plotted as the percent of the maximal glutamate and glycine response (mean ± s.e.m.) and fit by the Hill equation. The pIC50 values for 2AC1/2CC2 and 2CC1/2CC2 groups were compared by an F test [F (1,118) = 28.65, p < 0.001].[1].A Novel Negative Allosteric Modulator Selective for GluN2C/2D-Containing NMDA Receptors Inhibits Synaptic Transmission in Hippocampal Interneurons. ACS Chem Neurosci. 2018 Feb 21;9(2):306-319.
  • Structural determinants of NAB-14 reside in the M1 transmembrane helix. (a) A sequence alignment of the M1 transmembrane helix across rat GluN2 subunits shows four residues that differ between GluN2A/2B and GluN2C/2D (gray shading). Site-directed mutagenesis was used to switch these GluN2A and GluN2D residues and to mutate all M1 residues to alanine or cysteine. (b) A representative trace depicts the current response to 100 μM glutamate and 30 μM glycine recorded by TEVC in Xenopus oocytes in the absence and presence of 10 μM NAB-14. (c,d) The peak amplitudes of current responses were measured and expressed as the percent of the maximal response to glutamate and glycine. The data were analyzed by one-way ANOVA and post hoc (c) Bonferroni tests or (d) Dunnett’s tests. GluN2A mutants were compared to 2A WT, and GluN2D mutants were compared to 2D WT [c: F(9,42) = 38.155, p < 0.001; d: F(23,243) = 95.155, p < 0.001; *p < 0.05; see Supplementary Table 12 for mean comparison p-values]. [1].A Novel Negative Allosteric Modulator Selective for GluN2C/2D-Containing NMDA Receptors Inhibits Synaptic Transmission in Hippocampal Interneurons. ACS Chem Neurosci. 2018 Feb 21;9(2):306-319.
  • Association and dissociation kinetics of NAB-14. (a) Glutamate (100 μM) and glycine (30 μM) plus increasing concentrations of NAB-14 were co-applied to HEK cells transiently expressing GluN1/GluN2D using a rapid solution exchange system, as shown in a representative current response recorded by whole-cell voltage-clamp. (b) The current responses during NAB-14 association and dissociation were fit with single exponentials. The inverse of these time constants were plotted vs. NAB-14 concentration and fit by linear regression to determine the rate constants KON, the slope of the 1/τON line, and KOFF, the y-intercept of the 1/τOFF line. (c) Glycine plus increasing concentrations of NAB-14 were applied to HEK cells, then glutamate was applied for either 15 s or 5 ms in the continued presence of glycine and NAB-14. [1].A Novel Negative Allosteric Modulator Selective for GluN2C/2D-Containing NMDA Receptors Inhibits Synaptic Transmission in Hippocampal Interneurons. ACS Chem Neurosci. 2018 Feb 21;9(2):306-319.
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