AZD2461 is a novel PARP inhibitor with low affinity for Pgp than Olaparib. AZD2461 has an 80-fold increased Mdr1b expression on Olaparib-resistant KB1P tumor T6-28, without inhibition of Pgp. AZD2461 induces loss of 53BP1 expression in mice with KB1P tumors with short-term treatment. Long-term AZD2461 treatment is well tolerated and doubled the median relapse-free survival. Importantly, PARPi resistance was minimized by long-term treatment with the novel PARP inhibitor AZD2461, which is a poor P-glycoprotein substrate.
|Source||Cancer Res (2016). Figure 4. AZD2461|
|Cell Lines||A549 cells|
|Incubation Time||1 hour|
|Results||Unlike olaparib, which results in persistence of gH2AX following IR to the same degree as APLF knockdown, AZD2461 had no effect on gH2AX dynamics.|
|Body Surface Area (m2)||0.007||0.025||0.15||0.05||0.02||0.5|
|Animal A (mg/kg) = Animal B (mg/kg) multiplied by||Animal B Km|
|Animal A Km|
For example, to modify the dose of resveratrol used for a mouse (22.4 mg/kg) to a dose based on the BSA for a rat, multiply 22.4 mg/kg by the Km factor for a mouse and then divide by the Km factor for a rat. This calculation results in a rat equivalent dose for resveratrol of 11.2 mg/kg.
|Solubility||DMSO 60 mg/mL|
Loss of 53BP1 causes PARP inhibitor resistance in Brca1-mutated mouse mammary tumors.
Jaspers JE,et al. Cancer Discov. 2013 Jan;3(1):68-81. PMID: 23103855.
|Related PARP Products|
|Niraparib (MK-4827) tosylate
Niraparib (MK-4827) tosylate is an excellent PARP1 and PARP2 inhibitor with IC50 of 3.8 and 2.1 nM, respectively.
Daidzein is an inactive analogue of genistein, a tyrosine kinase inhibitor and an estrogen receptor activator.
NMS-P118 is a potent, orally available, and highly selective PARP-1 inhibitor endowed with excellent ADME and pharmacokinetic profiles, showing 150-fold selectivity for PARP-1 over PARP-2 (Kd 0.009 μM vs 1.39 μM, respectively).
E7449 is an orally bioavailable, brain penetrable, small molecule dual inhibitor of PARP1/2 that also inhibits PARP5a/5b, otherwise known as tankyrase1 and 2 (TNKS1/2), important regulators of canonical Wnt/β-catenin signaling. It has IC50 values of 1.0 and 1.2 nM for PARP1 and 2, respectively.
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