Research Area
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Description
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Reperfusion injury, Malignant melanoma |
Biological Activity
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Description
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INO-1001 is a potent inhibitor of PARP with IC50 of 50 nM and a mediator of oxidant-induced myocyte dysfunction during reperfusion. |
Targets
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PARP |
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IC50 |
50 nM [1] |
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In Vitro
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INO-1001 (>1 μM) leads to more than 95% inhibition of PARP activity without significant cellular toxicity. In addition, INO-1001 significantly sensitizes CHO cells by blocking most of the DNA repair occurring between radiation fractions. [1] Inhibition of PARP activity by INO-1001 significantly improves endothelial function by enhancing the acetylcholine-induced, endothelium-dependent, nitric oxide mediated vasorelaxation after exposure with 400 μM H2O2. [2] |
In Vivo
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In a db/db (Leprdb/db) mouse model, INO-1001 ameliorates diabetes-induced albumin excretion and mesangial expansion, and also decreases diabetes-induced podocyte depletion. [3] Treatment with INO-1001 (1.6 mg/kg via intracerebral injection) prevents NAD+ depletion and improves water maze performance after controlled cortical impact (CCI) in mice. [4] |
Clinical Trials
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INO-1001 is currently in Phase II clinical trials in patients with Acute Myocardial Infarction. |
Features
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Combination Therapy
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Description
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In a mismatch repair (MMR)-deficient xenograft, INO-1001 prior to isolated limb infusion (ILI) significantly increased the efficacy of temozolomide (TMZ) and reduces the increase in tumor volume of advanced extremity malignant melanoma than TMZ-ILI alone. [5] |
Protocol
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Kinase Assay
[1]
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PARP enzyme activity |
PARP activity is measured with a PARP Activity Assay Kit. This method measures relative PARP activity by determining the level of incorporation of 3H-NAD into trichloroacetic acid (TCA) precipitable material in the presence of sheared genomic DNA, which activates PARP. The reaction mixture is added directly to washed cultures in 12-well culture plates and the reaction is allowed to proceed for 60 minutes at 37 °C before the cells are removed mechanically, transferred to a microcentrifuge tube, and precipitated with ice-cold 5% TCA. |
Animal Study
[3]
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Animal Models |
Male db/db (Leprdb/db) mice. |
Formulation |
INO-1001 is dissolved in water. |
Doses |
≤60 mg/kg |
Administration |
Administered via p.o. |
References |
[1] Brock WA, et al. Cancer Lett. 2004, 205(2), 155-160.
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[2] Radovits T, et al. Eur J Pharmacol. 2007, 564(1-3), 158-166.
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[3] Szabó C, et al. Diabetes. 2006, 55(11), 3004-3012.
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[4] Clark RS, et al. J Neurotrauma. 2007, 24(8), 1399-1405.
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[5] Toshimitsu H, et al. Ann Surg Oncol. 2010, 17(8), 2247-2254.
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