Alpelisib

Solid. Soluble in DMSO or DMF. Selective PI3Kalpha inhibitor with IC50 of 5nM. Has minimal effect on other PI3K isoforms. Exhibits favorable pharmacokinetics and excellent oral bioavailability in animal models. In xenografts using nude mice, it showed dose-dependent effects of tumour inhibition. In a phase Ib study, it showed synergistic anti-tumor activity with endocrine therapy against ER+/PIK3CA mutated breast cancer cells.