New study finds promising drug doubled positive effect in hormone-receptor positive breast cancer — ScienceDaily
An investigational drug discovered and being developed by Pfizer Inc., palbociclib targets a key family of proteins (CDK4/6) responsible for cell growth by preventing them from dividing. Results of the multi-year phase 2 study showed a significant increase in progression-free survival (PFS0 for patients with advanced breast cancer that was estrogen receptor positive (ER+), HER2-negative (HER2-), who were given a combination of the standard anti-estrogen treatment letrozole and palbociclib, compared to letrozole alone. …