IPI-549 is an orally administered immuno-oncology development candidate that selectively inhibits PI3K-gamma.

>98%

Store at -20℃ for one year（Powder）；Store at 2-4℃ for two weeks；Store at -20℃ for six months after dissolution.

IPI549；IPI 549

Powder

DMSO : 15 mg/mL (28.38 mM; Need ultrasonic and warming)

PI3Kγ

IPI-549 is found to be a remarkably tight binder to PI3K-γ with a Kd of 290 pM and >58-fold weaker affinity for other Class I PI3K isoforms. It does not significantly inhibit a panel of 468 mutant and nonmutant protein and lipid kinases (including Class II PI3K isoforms) at 1 μM. In PI3K-α, -β, -γ, and -δ dependent cellular phospho-AKT assays, IPI-549 demonstrates excellent PI3K-γ potency (IC50 = 1.2 nM) and selectivity against other Class I PI3K isoforms (>146-fold). Furthermore, IPI-549 dose dependently inhibits PI3K-γ-dependent bone marrow-derived macrophage (BMDM) migration in vitro. IPI-549 is also found to be selective against a panel of 80 GPCRs, ion channels, and transporters at 10 μM. In vitro, IPI-549 shows moderate to high cell permeability across Caco-2 cell monolayers, is slowly metabolized in cultured hepatocytes (t1/2 > 360 min), and demonstrates IC50s greater than 20 μM for the CYP isoforms tested (1A2, 2B6, 2C8, 2C9, 2C19, 2D6, 3A4).

In vivo (mice, rats, dog, and monkeys), IPI-549 has excellent oral bioavailability, low clearance, and distributes into tissues with a mean volume of distribution of 1.2 L/kg. It has a favorable pharmacokinetic profile to allow potent and selective inhibition of PI3K-γ in vivo. IPI-549 can significantly reduce neutrophil migration in a dose-dependent manner in mouse model when administered orally at all of the tested doses. In addition, IPI-54 has been shown to inhibit tumor growth in murine syngeneic models through alteration of immune cells in the tumor microenvironment.