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General description
A non-cytotoxic (30 µM for 48 h in human airway epithelial Calu-3 cultures) aminopyrazolocarbonitrile compound that is shown to activate both wt- and ΔF508-CFTR channel activity in a cAMP-independent, reversible, and CFTRinh-172- (Cat. Nos. 219670 & 219674 ) blockable (IC50 & IC100 = 0.37 & 30 µM, respectively, against 30 µM Cact using Fisher rat thyroid/FRT cells with wt-CFTR) manner, without affecting CaCC (Calcium-activated chloride channel) function or cellular levels of Ca2+ and cAMP. The maximum activation inducible by Cact-A1 (ECmax = 13 to 30 µM in Cl- current induction using in Fisher rat thyroid/FRT and primary human bronchial epithelial/HBE cells) is comparable to that achievable via cAMP stimulation by Forskolin treatment (ECmax = 20 µM; Cat. Nos. 344270 & 344282), which cannot be further enhanced by Forskolin co-treatment in cells expressing wt-CFTR, although additive effects are seen when Cact-A1 and Forskoklin are applied at suboptimal concentrations to cells with wt-CFTR or when the two drugs are applied at respective ECmax to cells with surface ΔF508-CFTR. Neither Cact-A1 nor Forskolin alone (at 30 µM; and 20 µM;, respectively) can effectively activate FRT with surface G551D-CFTR or primary HNPE (human nasal polyp epithelial) cells with surface G551D/Y1092X-CFTR, while Cact-A1-Forskolin co-treatment results in synergistic activation and maximally achievable activation is reported with a three-drug co-treatment using Cact-A1, Forskolin, and VX-770 (at 30, 20, and 10 µM, respectively).
Biochem/physiol Actions
Cell permeable: yes
Primary Target
CFTR
Reversible: yes
Packaging
Packaged under inert gas
Preparation Note
Following reconstitution, aliquot and freeze (-20°C). Stock solutions are stable for up to 6 months at -20°C.
Other Notes
Namkung, W., et al. 2013. Mol. Pharmacol.84, 384.
Legal Information
CALBIOCHEM is a registered trademark of Merck KGaA, Darmstadt, Germany
Disclaimer
Toxicity: Standard Handling (A)
| assay | ≥98% (HPLC) |
| Quality Segment | 100 |
| form | powder |
| manufacturer/tradename | Calbiochem® |
| storage condition | OK to freeze,protect from light |
| color | light yellow |
| solubility | DMSO: 100 mg/mL |
| storage temp. | 2-8°C |
| 长度(mm) | |
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| 重量(kg) |
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