Abstract
Here, we describe the identification of PARP1/2 as direct binding proteins of andrographolide (Andro) using protein microarray, surface plasmon resonance (SPR), and enzyme activity assays. We then evaluated the proliferation inhibition, apoptosis, and cell migration effects of Andro on the MDA-MB-436 cell line in vitro. The final biological evaluation confirmed that Andro was a highly effective single agent in the MDA-MB-436 xenograft model and had a low hERG-mediated cardiac toxicity. Therefore, Andro represents the first natural product, non-amide member of a novel nanomolar-potency PARP1/2 inhibitor family.
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