[EN] HISTONE DEACETYLASE INHIBITOR, AND PREPARATION METHOD AND USE THEREOF<br/>[FR] INHIBITEUR DE L'HISTONE DÉSACÉTYLASE, SON PROCÉDÉ DE PRÉPARATION ET SON UTILISATION<br/>[ZH] 一种组蛋白去乙酰化酶抑制剂及其制备方法和用途
[EN] USE OF 4-ARYLAMINOQUINAZOLINE HYDROXAMIC ACID COMPOUNDS IN PREPARATION OF PAIN DRUG<br/>[FR] UTILISATION DE COMPOSÉS D'ACIDE 4-ARYLAMINOQUINAZOLINE HYDROXAMIQUE DANS LA PRÉPARATION D'UN MÉDICAMENT CONTRE LA DOULEUR<br/>[ZH] 4-芳氨基喹唑啉异羟肟酸类化合物在制备疼痛药物方面的用途
Novel selective histone deacetylase 6 (HDAC6) inhibitors using the quinazoline as the cap were designed, synthesized, and evaluated for HDAC enzymatic assays. N-Hydroxy-4-(2-methoxy-5-(methyl(2-methylquinazolin-4-yl)-amino)phenoxy)butanamide, 23bb, was the most potent selective inhibitor for HDAC6 with an IC50 of 17 nM and showed 25-fold and 200-fold selectivity relative to HDAC1 and HDAC8, respectively. In vitro, 23bb presented low nanomolar antiproliferative effects against panel of cancer cell lines. Western blot analysis further confirmed that 23bb increased acetylation level of a-tubulin in vitro. 23bb has a good pharmacokinetic profile with oral bioavailability of 47.0% in rats. In in vivo efficacy evaluations of colorectal HCT116, acute myelocytic leukemia MV4-11, and B cell lymphoma Romas xenografts, 23bb more effectively inhibited the tumor growth than SAI-IA even at a 4-fold reduced dose or ACY-1215 at the same dose. Our results indicated that 23bb is a potent oral anticancer candidate for selective HDAC6 inhibitor and deserves further investigation.