class i pi3k isoforms

Fimepinostat (CUDC 907) is an orally bioavailable inhibitor of both phosphoinositide 3-kinase (PI3K) class I and pan-histone deacetylase (HDAC) enzymes, with potential antineoplastic activity. Upon oral administration, CUDC-907 inhibits the activity of both PI3K class I isoforms and HDAC, thereby preventing the activation of the PI3K-AKT-mTOR signal transduction pathway that is often overactivated in many cancer cell types.

Samotolisib (LY3023414) is an oral ATP competitive inhibitor of the class I PI3K isoforms, DNA-PK, and mTOR. Samotolisib (LY3023414) has been used in trials studying the treatment of Neoplasm, Solid Tumor, COLON CANCER, BREAST CANCER, and Advanced Cancer, among others.

DS-7423 is a dual PI3K and mTOR inhibitor, with IC50 values of 15.6 nM and 34.9 nM for PI3Kα and mTOR, respectively, and exhibits anti-tumor activity[1][2]. It increases TP53 expression, the level of p-TP53 on Ser-46, and induces apoptosis-related TP53 target genes (TP53AIP1 and PUMA) in OCCC cells[1]. DS-7423 also inhibits other isoforms of class I PI3K with IC50 values of 1,143 nM for PI3Kβ, 249 nM for PI3Kγ, and 262 nM for PI3Kδ[2]. [1]. Katsutoshi Oda, et al. Characterization of TP53 and PI3K signaling pathways as molecular targets in gynecologic malignancies. J Obstet Gynaecol Res. 2016 Jul;42(7):757-62. [2]. Tomoko Kashiyama, et al. Antitumor activity and induction of TP53-dependent apoptosis toward ovarian clear cell adenocarcinoma by the dual PI3K mTOR inhibitor DS-7423. PLoS One. 2014 Feb 4;9(2):e87220.