NS 11021
Based on 3 publication(s) in Google Scholar
NS 11021 is a potent and specific Ca2+-activated big-conductance K+ Channels (KCa1.1 channels) activator. NS 11021 at concentrations above 0.3 μM activates KCa1.1 in a concentration-dependent manner by parallelshifting the channel activation curves to more negative potentials.
For research use only. We do not sell to patients.
- Purity: 99.51%
- CAS No.: 956014-19-0
- Formula: C16H9BrF6N6S
- Molecular Weight:511.24
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Storage:Powder -20°C, 3 years ; In solvent -80°C, 6 months , -20°C, 1 month
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Biological Activity
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Chemical Information
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Solvent & Solubility
- Purity & Documentation
- References
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Help & FAQs
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Publications Citing Use of MedChemExpress (MCE) NS 11021
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Biological Activity
Ca2+-activated big-conductance K+ Channels[1]
NS 11021 (1-30 μM) increases the current of hKCa1.1 from 2 μA to 4 μA at the concentration of 3 μM and can activate the hKCa1.1 expression channel in a dose-dependent manner in X. laevis oocytes[1].
NS 11021 (3 μM) increases hKCa1.1 current for channels by 171 % which repeatedly shifts between open and closed structures while increases the hKCa1.1 current by 187 % for channels kept in closed conformation in X. laevis oocytes[1].
NS 11021 (0-10 μM) can enhance hKCa1.1 currents in a concentration-dependent manner in monoclonal HEK293 cells stably expressing hKCa1.1[1].
NS 11021 (5 or 50 μM) has no effect on resting membrane potential (RMP), while significantly increasing action potential (AP) rise time in a dose-dependent manner in frogs gastrocnemius muscles. NS 11021 completely reverses the deleterious effects of hydrogen peroxide on the AP repolarization phase in skeletal muscle fibers[2].
NS 11021 (1 μM) effectively attenuates mitoBK channel damage, mitochondrial respiratory dysfunction, depolarization, superoxide production and cell death induced by CS + RW (cold storage (18 h) and rewarming (2 h)) in rat kidney proximal tubular epithelial (NRK) cells[3].
MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.
Chemical Information
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CAS No. 956014-19-0
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Appearance Solid
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Molecular Weight 511.24
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Formula C16H9BrF6N6S
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Color White to off-white
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SMILES
S=C(NC1=CC(C(F)(F)F)=CC(C(F)(F)F)=C1)NC2=CC=C(Br)C=C2C3=NN=NN3
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Shipping
Room temperature in continental US; may vary elsewhere.
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Storage
Powder -20°C 3 years In solvent -80°C 6 months -20°C 1 month
Publications (3)
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Journal Impact Factor
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Most Recent
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J Invest Dermatol
FAK-Dependent Reprogramming of IFN-γ Signaling through PYK2 Co-Inhibition Sensitizes Melanoma to Immune Checkpoint Blockade. [Abstract]2025 Oct 14:S0022-202X(25)03407-4. PMID: 41101630 -
Biomolecules
Caution for Multidrug Therapy: Significant Baroreflex Afferent Neuroexcitation Coordinated by Multi-Channels/Pumps Under the Threshold Concentration of Yoda1 and Dobutamine Combination. [Abstract]2024 Oct 16;14(10):1311. PMID: 39456244 -
J Cell Physiol
BKCa channel participates in insulin-induced lipid deposition in adipocytes by increasing intracellular calcium. [Abstract]2021 Aug;236(8):5818-5831. PMID: 33432604
Solvent & Solubility
DMSO : 100 mg/mL (195.60 mM; Need ultrasonic; Hygroscopic DMSO has a significant impact on the solubility of product, please use newly opened DMSO)
Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month. When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.
Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month. When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.
Concentration (start) × Volume (start) = Concentration (final) × Volume (final)
Select the appropriate dissolution method based on your experimental animal and administration route.
- For the following dissolution methods, please ensure to first prepare a clear stock solution using an In Vitro approach and then sequentially add co-solvents:
- To ensure reliable experimental results, the clarified stock solution can be appropriately stored based on storage conditions. As for the working solution for In Vivo experiments, it is recommended to prepare freshly and use it on the same day.
- The percentages shown for the solvents indicate their volumetric ratio in the final prepared solution. If precipitation or phase separation occurs during preparation, heat and/or sonication can be used to aid dissolution.
Add each solvent one by one: 10% DMSO 40% PEG300 5% Tween-80 45% Saline
Solubility: ≥ 2.08 mg/mL (4.07 mM); Clear solution
This protocol yields a clear solution of ≥ 2.08 mg/mL (saturation unknown).
Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (20.8 mg/mL) to 400 μL PEG300, and mix evenly; then add 50 μL Tween-80 and mix evenly; then add 450 μL Saline to adjust the volume to 1 mL.
Preparation of Saline: Dissolve 0.9 g sodium chloride in ddH₂O and dilute to 100 mL to obtain a clear Saline solution.
Please enter the basic information of animal experiments:
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Recommended: Prepare an additional quantity of animals to account for potential losses during experiments.
Please enter your animal formula composition:
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%DMSO +
Recommended: Keep the proportion of DMSO in working solution below 2% if your animal is weak.
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%+
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+%Tween-80 + +
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%Saline +
The co-solvents required include: DMSO, . All of co-solvents are available by MedChemExpress (MCE). , Tween 80. All of co-solvents are available by MedChemExpress (MCE).
Working solution concentration: 0.22 mg/mL
Method for preparing stock solution: mg drug dissolved in μL DMSO. Stock solution concentration: mg/mL.
1. Take μL DMSO stock solution;
2. Add μL .
μL , mix evenly;
3. Then add μL Tween 80, mix evenly;
4. Then add μL
Please ensure that the stock solution in the first step is dissolved to a clear state, and add co-solvents in sequence. You can use ultrasonic heating (ultrasonic cleaner, recommended frequency 20-40 kHz), vortexing, etc. to assist dissolution.
Purity & Documentation
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Data Sheet (276 KB)
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SDS (393 KB)
- English - EN (393 KB)
- Français - FR (393 KB)
- Deutsch - DE (393 KB)
- Norwegian - NO (393 KB)
- Español - ES (393 KB)
- Swedish - SV (393 KB)
- Italian - IT (393 KB)
- Korean - KR (393 KB)
- Portuguese - PT (393 KB)
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Handling Instructions (2659 KB)
References
[1]. Bo Hjorth Bentzen, et al. The small molecule NS11021 is a potent and specific activator of Ca2+-activated big-conductance K+ channels. Mol Pharmacol. 2007 Oct;72(4):1033-44 [Content Brief]
[2]. Cagil Coskun, et al. BK channel openers NS1619 and NS11021 reverse hydrogen peroxide-induced membrane potential changes in skeletal muscle. J Recept Signal Transduct Res. 2020 Oct;40(5):449-455. [Content Brief]
[3]. Stephen Shrum, et al. Specific BK Channel Activator NS11021 Protects Rat Renal Proximal Tubular Cells from Cold Storage-Induced Mitochondrial Injury In Vitro. Biomolecules. 2019 Dec 4;9(12):825. [Content Brief]
Complete Stock Solution Preparation Table
Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month. When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.
| Optional Solvent | Concentration Solvent Mass | 1 mg | 5 mg | 10 mg | 25 mg |
|---|---|---|---|---|---|
| DMSO | 1 mM | 1.9560 mL | 9.7801 mL | 19.5603 mL | 48.9007 mL |
| 5 mM | 0.3912 mL | 1.9560 mL | 3.9121 mL | 9.7801 mL | |
| 10 mM | 0.1956 mL | 0.9780 mL | 1.9560 mL | 4.8901 mL | |
| 15 mM | 0.1304 mL | 0.6520 mL | 1.3040 mL | 3.2600 mL | |
| 20 mM | 0.0978 mL | 0.4890 mL | 0.9780 mL | 2.4450 mL | |
| 25 mM | 0.0782 mL | 0.3912 mL | 0.7824 mL | 1.9560 mL | |
| 30 mM | 0.0652 mL | 0.3260 mL | 0.6520 mL | 1.6300 mL | |
| 40 mM | 0.0489 mL | 0.2445 mL | 0.4890 mL | 1.2225 mL | |
| 50 mM | 0.0391 mL | 0.1956 mL | 0.3912 mL | 0.9780 mL | |
| 60 mM | 0.0326 mL | 0.1630 mL | 0.3260 mL | 0.8150 mL | |
| 80 mM | 0.0245 mL | 0.1223 mL | 0.2445 mL | 0.6113 mL | |
| 100 mM | 0.0196 mL | 0.0978 mL | 0.1956 mL | 0.4890 mL |
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