Abstract

Colorectal cancer stem cells (CSCs) are a subset of cancer cells capable of tumor initiation and maintenance. Colorectal CSCs are also relatively resistant to 5-flurouracil and failure to kill this cell population contributes to tumor persistence or recurrence. CSC chemoresistance is at least partially controlled by enhanced DNA damage repair mechanisms. One such mechanism is regulated by poly(ADP-ribose) polymerase (PARP). Inhibition of PARP decreases the ability to repair DNA damage and leads to increased cancer cell death.

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