Home Blog of Signal Transduction Epigenetics PARP ABT-888 and quinacrine induced apoptosis in metastatic breast cancer stem cells by inhibiting base excision repair via adenomatous polyposis coli

Category

Archives

Popular Post

ESKM, a novel therapeutic agent for sensitive and resistant PH+ leukemias

The mechanism of resistance to JAK2 inhibitor in myeloproliferative neoplasms patients

Effects of PARP inhibitors in BRCA gene-mutated ovarian cancer

DASATINIB; An inhibitor of Receptor Tyrosine Kinase

GP130/JAK/STAT3 signaling pathway induces multiple myeloma

ABT-888 and quinacrine induced apoptosis in metastatic breast cancer stem cells by inhibiting base excision repair via adenomatous polyposis coli

PARP inhibitors in combination with other agents are in clinical trial against cancer, but its effect on cancer stem cells (CSCs) is limited. CSCs are responsible for drug resistance, metastasis and cancer relapse due to high DNA repair capacity. Here, we present preclinical effects of Quinacrine (QC) with ABT-888, a PARP inhibitor, on highly metastatic breast cancer stem cells (mBCSCs). An increased level of Adenomatous polyposis coli (APC) was noted after treatment with ABT-888 in QC pre-treated mBCSCs cells. Increased APC physically interacts with PARP-1 and inhibits PARylation causing the non assembly of base excision repair (BER) multiprotein complex, resulting in an irreparable DNA damage and subsequent apoptosis. Knockdown of APC in mBCSCs inhibited DNA damage, increased BER and PARylation, reduces apoptosis while the over-expression of APC in BT20 (APC low expressing) cells reversed the effect. Thus, combination of QC and ABT-888 decreased mBCSCs growth by activating APC and inhibiting BER within the cells.

Related Products

Cat.No. Product Name Information
S1098 Rucaparib phosphate Rucaparib phosphate is an inhibitor of PARP with Ki of 1.4 nM for PARP1 in a cell-free assay, also showing binding affinity to eight other PARP domains. Phase 3.

Related Targets

PARP