K41498
Based on 1 Customer Validation
K41498 is a highly selective CRF 2 receptor antagonist, with a Ki of 0.66 nM for human CRF2α receptor and a Ki of 0.62 nM for human CRF2β receptor. K41498 inhibits cAMP accumulation in cells expressing CRF2. K41498 antagonizes the hypotensive response induced by systemic administration of urocortin in conscious rats. K41498 undergoes radioiodination without loss of activity and serves for autoradiographic studies of native CRF2 receptors in rat brain and peripheral tissues.
For research use only. We do not sell to patients.
- Purity: 99.66%
- CAS No.: 434938-41-7
- Formula: C162H276N48O46
- Molecular Weight:3632.20
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Storage:
Sealed storage, away from moisture.
Powder -80°C, 2 years , -20°C, 1 year* In solvent : -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture)
To place orders, for customer services and technical support, please contact: MedChemExpress USA
Tel: 609-228-6898 E-mail: [email protected] [email protected]
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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
Biological Activity
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CRFR2 |
K41498 (incubated at 22°C for 120 min) exhibits highly selective and high-affinity binding to hCRF2α and hCRF2β receptors in membrane homogenates of stably transfected HEK293 cells (Ki = 0.66 nM and 0.62 nM, respectively), which is significantly superior to its binding to hCRF1 receptor[1].
K41498 (10 μM in hCRF1-expressing cells; 100 nM in hCRF2α- and hCRF2β-expressing cells; treated at 37°C for 10 min) is a potent, selective antagonist that inhibits cAMP accumulation in Svg-stimulated HEK293 cells expressing hCRF2α and hCRF2β. It exhibits only extremely low intrinsic agonist activity across all three receptor subtypes and shows weak activity at the hCRF1 receptor[1].
K41498 (100 nM, 10 min at 37°C for CRF2α/CRF2β cells; 10 μM, 10 min at 37°C for CRF1 cells) potently inhibits sauvagine-induced cAMP accumulation in HEK293 cells expressing human CRF2α and human CRF2β at a concentration of 100 nM, shows only weak inhibitory effect on HEK293 cells expressing human CRF1 at a concentration of 10 μM, and exhibits only extremely low intrinsic agonist activity in all three of the above-mentioned cell lines[2].
MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.
K41498 (1.84 mg; i.v.; single administration, 10 minutes prior to urocortin administration) completely blocks the systemic urocortin-induced hypotensive response in conscious male Wistar-Kyoto rats, whereas K41498 (2.35 mg; i.c.v.; single administration, 10 minutes prior to urocortin administration) fails to block the pressor effect induced by urocortin[2].
MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.
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Animal Model:BALB/c nude (9-week-old female, 18-25 g)[1]
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Dosage:1 mg/kg
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Administration:i.v.; single dose
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Result:Reduced specific uptake of 123I-K31440 in the small intestine by 35%.
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Animal Model:Wistar-Kyoto rats (male, 340-360 g)[2]
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Dosage:1.84 mg (systemic administration); 2.35 mg (central administration)
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Administration:i.v.; single dose, 10 minutes prior to urocortin; i.c.v.; single dose, 10 minutes prior to urocortin
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Result:Completely abolished the >30 mmHg hypotensive response evoked by systemic urocortin .
Did not alter the pressor response evoked by central urocortin.
Chemical Information
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CAS No. 434938-41-7
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Appearance Solid
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Molecular Weight 3632.20
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Formula C162H276N48O46
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Color White to off-white
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Sequence
{D-Phe}-His-Leu-Leu-Arg-Lys-{Nle}-Ile-Glu-Ile-Glu-Lys-Gln-Glu-Lys-Glu-Lys-Gln-Gln-Ala-Ala-Asn-Asn-Arg-Leu-Leu-Leu-Asp-Thr-Ile-NH2
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Sequence Shortening
{D-Phe}-HLLRK-{Nle}-IEIEKQEKEKQQAANNRLLLDTI-NH2
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Shipping
Room temperature in continental US; may vary elsewhere.
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Storage
Sealed storage, away from moisture
Powder -80°C 2 years -20°C 1 year * In solvent : -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture)
Solvent & Solubility
H2O : 50 mg/mL (13.77 mM; Need ultrasonic)
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 (sealed storage, away from moisture). When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.
* Note: If you choose water as the stock solution, please dilute it to the working solution, then filter and sterilize it with a 0.22 μm filter before use.
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 (sealed storage, away from moisture). When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.
* Note: If you choose water as the stock solution, please dilute it to the working solution, then filter and sterilize it with a 0.22 μm filter before use.
Concentration (start) × Volume (start) = Concentration (final) × Volume (final)
Purity & Documentation
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Data Sheet (284 KB)
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SDS (252 KB)
- English - EN (252 KB)
- Français - FR (252 KB)
- Deutsch - DE (252 KB)
- Norwegian - NO (252 KB)
- Español - ES (252 KB)
- Swedish - SV (252 KB)
- Italian - IT (252 KB)
- Korean - KR (252 KB)
- Portuguese - PT (252 KB)
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Handling Instructions (2659 KB)
References
[1]. Rühmann A, et al. Design, synthesis and pharmacological characterization of new highly selective CRF(2) antagonists: development of 123I-K31440 as a potential SPECT ligand. Peptides. 2002;23(3):453-460. [Content Brief]
[2]. Lawrence AJ, et al. The highly selective CRF(2) receptor antagonist K41498 binds to presynaptic CRF(2) receptors in rat brain. Br J Pharmacol. 2002 Jul;136(6):896-904. [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 (sealed storage, away from moisture). 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 |
|---|---|---|---|---|---|
| H2O | 1 mM | 0.2753 mL | 1.3766 mL | 2.7532 mL | 6.8829 mL |
| 5 mM | 0.0551 mL | 0.2753 mL | 0.5506 mL | 1.3766 mL | |
| 10 mM | 0.0275 mL | 0.1377 mL | 0.2753 mL | 0.6883 mL |
* Note: If you choose water as the stock solution, please dilute it to the working solution, then filter and sterilize it with a 0.22 μm filter before use.
K41498 Related Classifications
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