1290069-19-0

Biological Activity: OSU-53 is an orally active AMPK activator and mTOR inhibitor, with an IC₅₀ of 0.3 μM for AMPK, an EC₅₀ of 2-5 μM for AMPK, and an IC₅₀ of 8.23 μM for mTOR. OSU-53 inhibits the Akt signaling pathway, directly activates AMPK by binding to its autoinhibitory domain, reduces IKKβ-mediated phosphorylation of Foxo3a, blocks Akt-mediated phosphorylation of MDM2, and promotes the nuclear localization and stabilization of Foxo3a, while directly inhibiting mTOR. OSU-53 inhibits epithelial-mesenchymal transition (EMT), induces epithelial phenotype, suppresses invasion and metastasis, induces autophagy, inhibits the activation of ERK and Akt, reduces the secretion of nitric oxide and proinflammatory cytokines, and inhibits the migration of MDSC; at high doses, it induces MDSC apoptosis, attenuates the immunosuppressive effect of MDSC, reduces MDSC levels, and blocks incision-induced mechanical hyperalgesia. OSU-53 can be used in studies related to breast cancer, prostate cancer, thyroid cancer, melanoma and postoperative pain^[1][2][3][4].