PARP Inhibitor in treatment of Breast cancer
Abstract
Breast cancer is the most common cancer among women. It accounts for approximately about 14% in all
types of cancer. Poly (ADP-ribose) polymerases (PARP) are enzymes (a nuclear protein) involved in DNA-
damage repair. It is a small-molecule inhibitors which are thought to mediate their antitumor effect as a
catalytic inhibitor that blocks repair of DNA single strand break. Inhibition of PARP for treating breast
cancer is a promising strategy. PARP inhibition is a therapeutic approach to selectively kill a subset of cancer
which has deficiencies in DNA repair pathway including Brca1 and Brca2 mutated breast cancer and ovarian
cancer. Several PARP inhibitors are currently in trial in adjuvant, neoadjuvant and metastatic setting. PARP
inhibitors are first clinically approved drugs designed to exploit synthetic lethality. Wherein the current
understanding of PARP inhibitors is evaluated or discussed, including their effectiveness, side effects, and
safety. antitumor activity as a single agent or in combination and mechanism of acquired resistance to PARP
inhibitors. PARP inhibitor plus chemotherapy and PARP inhibitor plus immunotherapy are novel approaches
which are also under study.
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