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PTC-209 is a novel potent and selective BMI-1 inhibitor, targeting the BMI-1 self-renewal machinery with an IC₅₀ of ~0.5 µM. Tumor formation and, more specifically, human colorectal cancer-initiating cells (CIC) are dependent on the canonical self-renewal regulator BMI-1. Down-regulation of BMI-1 inhibits the ability of colorectal CICs to self-renew, resulting in the abrogation of their tumorigenic potential. Treatment of primary colorectal cancer xenografts with the small-molecule BMI-1 inhibitor PTC-209 resulted in colorectal CIC loss with long-term and irreversible impairment of tumor growth. Targeting the BMI-1 self-renewal machinery represents a promising approach to the elimination of many cancer stem (and initiating) cells.

How to Use:

• In vitro: PTC-209 was used at 0.5-1 µM final concentration in various in vitro assays.
• In vivo: PTC-209 was administered subcutaneously once a day at a dose of 60 mg/kg in primary human colon cancer xenograft models in nude mice.

Reference:

1. 1. Kreso A, et al. Self-renewal as a therapeutic target in human colorectal cancer. (2014) Nat Med. (1):29-36.

Products are for research use only. Not for human use.