Histone deacetylase inhibitors reverse gene silencing in Friedreich's ataxia.
Expansion of GAA x TTC triplets within an intron in FXN (the gene encoding frataxin) leads to transcription silencing, forming the molecular basis for the neurodegenerative disease Friedreich's ataxia. Gene silencing at expanded FXN alleles is accompanied by hypoacetylation of histones H3 and H4 and trimethylation of histone H3 at Lys9, observations that are consistent with a heterochromatin-mediated repression mechanism. We describe the synthesis and characterization of a class of histone deacetylase (HDAC) inhibitors that reverse FXN silencing in primary lymphocytes from individuals with Friedreich's ataxia. We show that these molecules directly affect the histones associated with FXN, increasing acetylation at particular lysine residues on histones H3 and H4 (H3K14, H4K5 and H4K12). This class of HDAC inhibitors may yield therapeutics for Friedreich's ataxia.
Herman
David
D
Department of Molecular Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, USA.
Jenssen
Kai
K
Burnett
Ryan
R
Soragni
Elisabetta
E
Perlman
Susan L
SL
Gottesfeld
Joel M
JM
D000107:Acetylation; D000483:Alleles; D000813:Anilides / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology*; D002460:Cell Line; D002478:Cells, Cultured; D004305:Dose-Response Relationship, Drug; D004791:Enzyme Inhibitors / Q000737:chemistry / Q000494:pharmacology* / Q000627:therapeutic use; D005621:Friedreich Ataxia / Q000188:drug therapy / Q000235:genetics*; D005786:Gene Expression Regulation / Q000187:drug effects; D020868:Gene Silencing / Q000187:drug effects*; D006367:HeLa Cells; D006570:Heterochromatin / Q000187:drug effects / Q000235:genetics; D056572:Histone Deacetylase Inhibitors; D006657:Histones / Q000737:chemistry / Q000187:drug effects / Q000378:metabolism; D006801:Humans; D033862:Iron-Binding Proteins / Q000096:biosynthesis / Q000187:drug effects; D015394:Molecular Structure; D012333:RNA, Messenger / Q000187:drug effects / Q000235:genetics; D014158:Transcription, Genetic / Q000187:drug effects; D000096923:Frataxin
D000813:Anilides; D004791:Enzyme Inhibitors; D006570:Heterochromatin; D056572:Histone Deacetylase Inhibitors; D006657:Histones; D033862:Iron-Binding Proteins; D012333:RNA, Messenger; D000096923:Frataxin; C514580:N1-(2-aminophenyl)-N8-phenyloctanediamide