Pfizer drug helps stop progression of breast cancer

Pfizer's (PFE) Palbociclib treatment doubled progression-free survival to 20.2 months in a Phase 2 trial of 165 patients with advanced breast cancer.

Palbociclib also helped patients live four months longer, although the result isn't statistically significant.

Palbociclib is part of a new class of drug called CDK 4/6 inhibitors, which limit the activity of two enzymes involved in cell division — cyclin-dependent kinases 4 and 6.

Palbociclib is considered a potential blockbuster that could be used with other cancers, and it is forecast to sell $3.11B by 2020. Amgen (AMGN) would receive an 8% royalty on any sales. (PR)

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