NU 7026 (LY293646) is a novel specific DNA-PK inhibitor with IC₅₀ of 0.23 μM, also inhibits PI3K with IC₅₀ of 13 μM.

NU7026 (10 μM) potentiates ionizing radiation (IR) cytotoxicity [potentiation factor at 90% cell kill (PF₉₀)=1.51±0.04] in exponentially growing DNA-PK proficient but not deficient cells^[1]. NU7026 synergistically sensitizes I83 cells to Chlorambucil (CLB) 3.5-fold^[2].NU7026, a novel inhibitor of the DNA repair enzyme DNA-dependent protein kinase (DNA-PK). At a dose of 10 μM, which is nontoxic to cells per se, a minimum NU7026 exposure of 4 h in combination with 3 Gy radiation is required for a significant radiosensitisation effect in CH1 human ovarian cancer cells^[3].
Solution in vitro: NU7026 is dissolved in anhydrous DMSO. NU7026 is added to cells to a final concentration of 0.25% DMSO (v/v)^[4].

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

* 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, 1 year; -20°C, 6 months. When stored at -80°C, please use it within 1 year. When stored at -20°C, please use it within 6 months.

• [1]. Veuger SJ, et al. Radiosensitization and DNA repair inhibition by the combined use of novel inhibitors of DNA-dependent protein kinase and poly(ADP-ribose) polymerase-1. Cancer Res. 2003 Sep 15;63(18):6008-15.  [Content Brief]

  [2]. Amrein L, et al. Chlorambucil cytotoxicity in malignant B lymphocytes is synergistically increased by 2-(morpholin-4-yl)-benzo10chomen-4-one (NU7026)-mediated inhibition of DNA double-strand break repair via inhibition of DNA-dependent protein kinase. J  [Content Brief]

  [3]. Nutley BP, et al. Preclinical pharmacokinetics and metabolism of a novel prototype DNA-PK inhibitor NU7026. Br J Cancer. 2005 Oct 31;93(9):1011-8.  [Content Brief]

  [4]. Ciszewski WM, et al. Interleukin-4 enhances PARP-dependent DNA repair activity in vitro. J Interferon Cytokine Res. 2014 Sep;34(9):734-40.  [Content Brief]