For research use only.

Catalog No.S7438

6 publications

ME0328 Chemical Structure

CAS No. 1445251-22-8

ME0328 is a potent and selective PARP inhibitor with IC50 of 0.89 μM for PARP3, about 7-fold selectivity over PARP1.

Selleck's ME0328 has been cited by 6 publications

2 Customer Reviews

  • Colony survival assay in wild-type A549 cells treated with vehicle, 3.0 μM ME0328 or 500 nM KU58948 and pyridostatin.

    Nat Commun, 2017, 8:15110.. ME0328 purchased from Selleck.

    Combination drug treatment increased multinucleated giant cells via spindle microtubule alteration and cell cycle arrest. Immunofluorescent staining of BT-20 cell line after treatment with vinorelbine (NVB) or vinorelbine in combination with 5 μM of either ME0328 (NVB + ME) or olaparib (NVB + Olaparib) for 24 h. Cells were stained with Dapi for DNA (blue). α-tubulin for microtubules (green) and the merge with a 100× objective. Abundant multinucleated giant cells observed in cells treated with NVB + ME and NVB + Olaparib comparing with NVB alone.

    Breast Cancer Res Treat, 2018, 172(1):23-32. ME0328 purchased from Selleck.

Purity & Quality Control

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Biological Activity

Description ME0328 is a potent and selective PARP inhibitor with IC50 of 0.89 μM for PARP3, about 7-fold selectivity over PARP1.
PARP3 [1] PARP1 [1]
0.89 μM 6.3 μM
In vitro

ME0328 is soluble, cell permeable, and metabolically stable in human liver microsomes and rat hepatocytes. ME0328 (10 μM) results in a significant delay of γH2AX-foci resolution by affecting ARTD3 in A549 and MRC5 cells without significant toxicity. [1]


Kinase Assay:


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Enzymatic Assays:

Protein ADP-ribosylation is measured using hexahistidine-tagged ARTD proteins and recombinant histone proteins captured on 96-well Ni2+-chelating plates (5-PRIME). ADP-ribosylation reactions are initiated by addition of NAD+ (2% biotinylated), and modified reaction products are detected by chemiluminescence. Km values are estimated using plots of initial rates vs. NAD+ concentrations and linear curve fitting with GraphPad Prism. All compounds are dissolved in dimethyl sulfoxide (DMSO) to a stock concentration of 50 mM. Experiments to determine IC50 values are conducted with compound concentrations in the range between 10 nM and 450 μM with a DMSO concentration of 1% (v/v). Measurements are carried out at an NAD+ concentration below Km for each transferase. IC50 values are estimated using curve fitting with GraphPad Prism. Reported values represent means ± SE of the fits of the curves based on duplicate or triplicate experiments, each determined based on three replicates.
Cell Research:


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  • Cell lines: A549 and MRC5 cells.
  • Concentrations: ~10 μM
  • Incubation Time: 72 hours
  • Method:

    Compound cytotoxicity in A549 and MRC5 cells is evaluated using WST-1 assays. A549 cells are cultured in Dulbecco’s Modified Eagle’s Medium supplemented with 10% fetal calf serum (FCS), penicillin, and streptomycin. MRC5 cells are cultured in Minimal Essential Medium supplemented with 10% FCS, penicillin, streptomycin, and l-glutamine. Both cell lines are maintained in a humidified incubator at 37°C and 5% CO2.

    (Only for Reference)

Solubility (25°C)

In vitro DMSO 64 mg/mL (199.14 mM)
Water Insoluble
Ethanol Insoluble

* Please note that Selleck tests the solubility of all compounds in-house, and the actual solubility may differ slightly from published values. This is normal and is due to slight batch-to-batch variations.

Chemical Information

Molecular Weight 321.37


CAS No. 1445251-22-8
Storage powder
in solvent
Synonyms N/A
Smiles CC(C1=CC=CC=C1)NC(=O)CCC2=NC3=CC=CC=C3C(=O)N2

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Answers to questions you may have can be found in the inhibitor handling instructions. Topics include how to prepare stock solutions, how to store inhibitors, and issues that need special attention for cell-based assays and animal experiments.

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PARP Signaling Pathway Map

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Cell Lines Assay Type Concentration Incubation Time Formulation Activity Description PMID