1. Membrane Transporter/Ion Channel
    Neuronal Signaling
  2. GABA Receptor
  3. MRK-016

MRK-016 

Cat. No.: HY-100370 Purity: 98.29%
Handling Instructions

MRK-016 is a selective, orally bioavailable inverse agonist of GABAA α5 receptor, with an EC50 of 3 nM for GABAA α5, and Kis of 0.83, 0.85, 0.77 and 1.4 nM for human GABAA α1β3γ2, GABAA α2β3γ2, GABAA α3β3γ2, and GABAA α5β3γ2, respectively; MRK-016 also readily penetrates the CNS.

For research use only. We do not sell to patients.

MRK-016 Chemical Structure

MRK-016 Chemical Structure

CAS No. : 342652-67-9

Size Price Stock Quantity
10 mM * 1 mL in DMSO USD 132 In-stock
Estimated Time of Arrival: December 31
5 mg USD 120 In-stock
Estimated Time of Arrival: December 31
10 mg USD 190 In-stock
Estimated Time of Arrival: December 31
50 mg USD 750 In-stock
Estimated Time of Arrival: December 31
100 mg   Get quote  
200 mg   Get quote  

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Customer Review

Based on 1 publication(s) in Google Scholar

Top Publications Citing Use of Products
  • Biological Activity

  • Protocol

  • Purity & Documentation

  • References

  • Customer Review

Description

MRK-016 is a selective, orally bioavailable inverse agonist of GABAA α5 receptor, with an EC50 of 3 nM for GABAA α5, and Kis of 0.83, 0.85, 0.77 and 1.4 nM for human GABAA α1β3γ2, GABAA α2β3γ2, GABAA α3β3γ2, and GABAA α5β3γ2, respectively; MRK-016 also readily penetrates the CNS.

IC50 & Target

EC50: 3 nM (GABAA α5)[1]
Ki: 0.83 nM (Human GABAA α1β3γ2), 0.85 nM (Human GABAA α2β3γ2), 0.77 nM (Human GABAA α3β3γ2), 1.4 nM (Human GABAA α5β3γ2)[1]

In Vitro

MRK-016 is a selective, orally bioavailable inverse agonist of GABAA α5 receptor, with an EC50 of 3 nM for GABAA α5, and Kis of 0.83, 0.85, 0.77 and 1.4 nM for human GABAA α1β3γ2, GABAA α2β3γ2, GABAA α3β3γ2, and GABAA α5β3γ2, respectively[1][2]. MRK-016 is a full inverse agonist at the α5-subtype, shows very weak affinity at the GABAA α4β3γ2-subtype (Ki 395 ± 173 nM) and is essentially inactive at the GABAA α6β3γ2 receptor (Ki > 4000 nM)[1]. MRK-016 shows a weak effect on GABAA α4β3γ2 with a Ki of 400 nM. MRK-016 (100 nM) alao increases long-term potentiation in mouse hippocampal slices[2].

In Vivo

MRK-016 does not enhance pentylenetetrazole-induced convulsions at 10 mg/kg via ip, or cause seizures at 30 mg/kg, via po for 20 days in mice. MRK-016 shows no obvious anxiogenic-like effects in rats at doses that occupy >95% of benzodiazepine (BZ) binding sites. MRK-016 (0.3, 1, and 3 mg/kg, p.o.) dose-dependently improves performance of rats hippocampal-dependent memory task[1]. MRK-016 (0.3-30 mg/kg, p.o.) causes good receptor occupancy in rats. MRK-016 (0.3, 1, or 3 mg/kg p.o.) shows cognition-enhancing activity in the delayed matching-to-position version of the Morris water maze. MRK-016 (1, 3, or 10 mg/kg i.p.) does not produce kindling in mice[2]. MRK-016 (3 mg/kg, i.p.) protects against LPS-induced learning/memory decrements in mice[3].

Molecular Weight

368.39

Formula

C₁₇H₂₀N₈O₂

CAS No.

342652-67-9

SMILES

CN1N=CN=C1COC2=NN3C(C4=NOC(C)=C4)=NN=CC3=C2C(C)(C)C

Shipping

Room temperature in continental US; may vary elsewhere

Storage
Powder -20°C 3 years
  4°C 2 years
In solvent -80°C 6 months
  -20°C 1 month
Solvent & Solubility
In Vitro: 

DMSO : 50 mg/mL (135.73 mM; Need ultrasonic)

Preparing
Stock Solutions
Concentration Solvent Mass 1 mg 5 mg 10 mg
1 mM 2.7145 mL 13.5726 mL 27.1451 mL
5 mM 0.5429 mL 2.7145 mL 5.4290 mL
10 mM 0.2715 mL 1.3573 mL 2.7145 mL
*Please refer to the solubility information to select the appropriate solvent.
In Vivo:
  • 1.

    Add each solvent one by one:  10% DMSO    40% PEG300    5% Tween-80    45% saline

    Solubility: ≥ 2.75 mg/mL (7.46 mM); Clear solution

  • 2.

    Add each solvent one by one:  10% DMSO    90% (20% SBE-β-CD in saline)

    Solubility: ≥ 2.75 mg/mL (7.46 mM); Clear solution

  • 3.

    Add each solvent one by one:  10% DMSO    90% corn oil

    Solubility: ≥ 2.75 mg/mL (7.46 mM); Clear solution

*All of the co-solvents are provided by MCE.
References
Kinase Assay
[1]

L(tk-) cells expressing human recombinant GABAA receptors containing β3- and γ2-subunits in combinatioon with various α-subunits are harvested and binding performed. The displacement of [3H]Ro 15-1788 binding by the test compounds (MRK-016, etc.) is measured in GABAA receptors containing eigher an α1-, α2-, α3-, and α5-subunit and from the IC50 and the Ki is calculated assuming respective Kd values of [3H]Ro 15-1788 binding of 0.92, 1.05, 0.58 and 0.45 nM at the α1-, α2-, α3-, and α5-subtypes. Nonspecific binding is defined by the inclusion of 10 μM flunitrazepam for the α1-, α2-, α3-, and α5-subtypes. The percentage inhibition of [3H]Ro 15-1788, the IC50 and the Ki values are calculated using ActivityBase[1].

MCE has not independently confirmed the accuracy of these methods. They are for reference only.

Animal Administration
[1]

Mice[1]
The proconvulsant potential MRK-016 is determined in this assay. The convulsant is pentylenetetrazole which is dosed at 15 mg/mL with an infusion rate of 0.2 mL/min. This rate is chosen to ensure that drug-naive mince reach the terminal convulsion sign within 1 min. MRK-016 is dosed intraperitoneally (ip) at a concentration of 1, 3, and 10 mg/kg in 70% PEG 300[1].

MCE has not independently confirmed the accuracy of these methods. They are for reference only.

References
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Product Name:
MRK-016
Cat. No.:
HY-100370
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