Stenoparib (E7449)

Catalog No.S8419 Batch:S841901

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Technical Data

Formula

C18H15N5O
Molecular Weight 317.34 CAS No. 1140964-99-3
Solubility (25°C)* In vitro DMSO 4 mg/mL (12.6 mM)
Water Insoluble
Ethanol Insoluble
* <1 mg/ml means slightly soluble or 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.
* Room temperature shipping (Stability testing shows this product can be shipped without any cooling measures.)

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Biological Activity

Description Stenoparib (E7449, 2X-121, MGI25036) is an orally bioavailable, brain penetrable, small molecule dual inhibitor of PARP1/2 and 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.
Targets
PARP1 [1] PARP2 [1]
1 nM 1.2 nM
In vitro E7449 inhibits PARP enzymatic activity and additionally traps PARP1 onto damaged DNA; a mechanism previously shown to augment cytotoxicity. E7449 inhibits Wnt/β-catenin signaling in colon cancer cell lines, likely through TNKS inhibition. E7449 stabilizes axin and TNKS proteins resulting in β-catenin de-stabilization and significantly alters expression of Wnt target genes. E7449 inhibits TNKS1 and 2 (PARP5a and 5b) with IC50 values of 50-100 nmol/L. Significant inhibitory activity is not observed for PARP3 or PARPs 6-16 (PARP9 and 13 lack activity and PARP4 had minimal signal)[1].
In vivo Chemotherapy is potentiated by E7449 and single agent has significant antitumor activity in BRCA-deficient xenografts. E7449 lacks single agent antitumor activity in vivo. E7449 antitumor activity is increased through combination with MEK inhibition. Treatment with E7449 at 30 or 100 mg/kg in xenografts is well-tolerated without any significant body weight loss or deaths. Treatment with E7449 at 100 mg/kg resulted in significant PARP inhibition that is sustained for at least 12 hours and recovered to basal levels within 24 h[1].

Protocol (from reference)

Cell Assay:[1]
  • Cell lines

    Human breast cancer cell lines, HCC1143, HCC70, HCC1806, MDA-MB-436, T47D, MDA-MB-157, MDA-MB-231, MDA-MB-468, MDA-MB-453, BT-20 and Hs578T

  • Concentrations

    --

  • Incubation Time

    8 days

  • Method

    For proliferation assays cells are plated at low density in 96 well plates. E7449 is added at various concentrations and plates incubated for a total of 8 days; compound and medium are replenished on day 4. Cell growth is assessed.
Animal Study:[1]
  • Animal Models

    C57BL/6 mice

  • Dosages

    30, 100 or 300 mg/kg

  • Administration

    oral administration

Selleck's Stenoparib (E7449) has been cited by 7 publications

Aggregability of the SQSTM1/p62-based aggresome-like induced structures determines the sensitivity to parthanatos [ Cell Death Discov, 2024, 10(1):74] PubMed: 38346947
Haploinsufficiency of ZNF251 causes DNA-PKcs-dependent resistance to PARP inhibitors in BRCA1-mutated cancer cells [ Res Sq, 2023, rs.3.rs-2688694] PubMed: 37066268
Haploinsufficiency of ZNF251 causes DNA-PKcs-dependent resistance to PARP inhibitors in BRCA1-mutated cancer cells [ Res Sq, 2023, rs.3.rs-2688694] PubMed: 37066268
BAP1 promotes the repair of UV-induced DNA damage via PARP1-mediated recruitment to damage sites and control of activity and stability [ Cell Death Differ, 2022, 10.1038/s41418-022-01024-w] PubMed: 35637285
Stenoparib, an inhibitor of cellular poly (ADP-ribose) polymerases (PARPs), blocks in vitro replication of SARS-CoV-2 variants [ PLoS One, 2022, 17(9):e0272916] PubMed: 36103462
CRISPR screening identifies novel PARP inhibitor classification based on distinct base excision repair pathway dependencies [ bioRxiv, 2021, 10.1101/2020.10.18.333070] PubMed: None
Response of Breast Cancer Cells to PARP Inhibitors Is Independent of BRCA Status. [ J Clin Med, 2020, 30;9(4)] PubMed: 32235451

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SHIPPING AND STORAGE
Selleck products are transported at room temperature. If you receive the product at room temperature, please rest assured, the Selleck Quality Inspection Department has conducted experiments to verify that the normal temperature placement of one month will not affect the biological activity of powder products. After collecting, please store the product according to the requirements described in the datasheet. Most Selleck products are stable under the recommended conditions.

NOT FOR HUMAN, VETERINARY DIAGNOSTIC OR THERAPEUTIC USE.