AES-135

AES-135, a hydroxamic acid-based pan-HDAC inhibitor, prolongs survival in an orthotopic mouse model of pancreatic cancer. AES-135 inhibits HDAC3, HDAC6, HDAC8, and HDAC11 with IC₅₀s ranging from 190-1100 nM^[1]. IC50 & Target: IC50: 654 nM (HDAC3), 190 nM (HDAC6), 636 nM (HDAC11)^[1] In Vitro: AES-135 inhibits cancer cells growth with IC₅₀ values of 2.3 µM, 1.4 µM, 0.27 µM, 0.94 µM, 1.9 µM, 2.72 µM, 2.1 µM, 15.0 µM, 1.6 µM and 19.2 µM for BT143, BT189, D425, D458, MV4-11, MOLM-13, MDA-MB-231, K562, PC-3 and MRC-9 cells, respectively^[1]. In Vivo: AES-135 (50 mg/kg; intraperitoneal injection; 5 days a week; for 1 month) treatment significantly increases survival of C57Bl/6 mice implanted with KPC2 cells^[1].
NSG mice are dosed with a single 20 mg/kg intraperitoneal (IP) injection, and blood is taken at 0.5 h, 1 h, 2 h, 4 h, 8 h, and 24 h. AES-135 achieved μM concentrations in the blood, reaching C_max 7452 ng/mL (10.74 μM) within 30 min, which is sustained for 8 h. The blood concentration of AES-135 is dose dependent, achieving an average of 323 ng/mL (0.47 μM) with 10 mg/kg dosing and 1829 ng/mL (2.64 μM) with 40 mg/kg. AES-135 shows an impressive pharmacokinetic profile in mice with an in vivo half-life of 5.0 h^[1].