Brain Penetrable Histone Deacetylase 6 Inhibitor SW-100 Ameliorates Memory and Learning Impairments in a Mouse Model of Fragile X Syndrome
作者:Alan P. Kozikowski、Sida Shen、Marta Pardo、Maurício T. Tavares、Dora Szarics、Veronick Benoy、Chad A. Zimprich、Zsófia Kutil、Guiping Zhang、Cyril Bařinka、Matthew B. Robers、Ludo Van Den Bosch、James H. Eubanks、Richard S. Jope
DOI:10.1021/acschemneuro.8b00600
日期:2019.3.20
Disease-modifying therapies are needed for Fragile X Syndrome (FXS), as at present there are no effective treatments or cures. Herein, we report on a tetrahydroquinoline-based selective histone deacetylase 6 (HDAC6) inhibitor SW-100, its pharmacological and ADMET properties, and its ability to improve upon memory performance in a mouse model of FXS, Fmr1-1- mice. This small molecule demonstrates good brain penetrance, low-nanomolar potency for the inhibition of HDAC6 (IC50 = 2.3 nM), with at least a thousand-fold selectivity over all other class I, II, and IV HDAC isoforms. Moreover, through its inhibition of the alpha-tubulin deacetylase domain of HDAC6 (CD2), in cells SW-100 upregulates alpha-tubulin acetylation with no effect on histone acetylation and selectively restores the impaired acetylated alpha-tubulin levels in the hippocampus of Fmr1(-/-) mice. Lastly, SW-100 ameliorates several memory and learning impairments in Fmr1(-/-) mice, thus modeling the intellectual deficiencies associated with FXS, and hence providing a strong rationale for pursuing HDAC6-based therapies for the treatment of this rare disease.