Dual target PARP1/EZH2 inhibitors inducing excessive autophagy and producing synthetic lethality for triple-negative breast cancer therapy.
Eur J Med Chem
; 265: 116054, 2024 Feb 05.
Article
in En
| MEDLINE
| ID: mdl-38134746
ABSTRACT
Currently available PARP inhibitors are mainly used for the treatment of BRCA-mutated triple-negative breast cancer (TNBC), with a narrow application range of approximately 15% of patients. Recent studies have shown that EZH2 inhibitors have an obvious effect on breast cancer xenograft models and can promote the sensitivity of ovarian cancer cells to PARP inhibitors. Here, a series of new dual-target PARP1/EZH2 inhibitors for wild-BRCA type TNBC were designed and synthesized. SAR studies helped us identify compound 12e, encoded KWLX-12e, with good inhibitory activity against PARP1 (IC50 = 6.89 nM) and EZH2 (IC50 = 27.34 nM). Meanwhile, KWLX-12e showed an optimal cytotoxicity against MDA-MB-231 cells (IC50 = 2.84 µM) and BT-549 cells (IC50 = 0.91 µM), with no toxicity on normal breast cell lines. KWLX-12e also exhibited good antitumor activity with the TGI value of 75.94%, more effective than Niraparib plus GSK126 (TGI = 57.24%). Mechanistic studies showed that KWLX-12e achieved synthetic lethality indirectly by inhibiting EZH2 to increase the sensitivity to PARP1, and induced cell death by regulating excessive autophagy. KWLX-12e is expected to be a potential candidate for the treatment of TNBC.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Triple Negative Breast Neoplasms
/
Poly(ADP-ribose) Polymerase Inhibitors
Limits:
Humans
Language:
En
Journal:
Eur J Med Chem
Year:
2024
Document type:
Article
Affiliation country:
China