title: Trichostatin A, a histone deacetylase inhibitor, down-regulates interleukin-12 transcription in SV-40-transformed lung epithelial cells.
abstract: Inhibition of histone deacetylation results in increased gene expression. Trichostatin (Ts)A, a specific histone deacetylase (HDAC) inhibitor, up-regulates transcription of some genes but represses expression of others. We quantified histone acetylation in SV-40-transformed lung epithelial cells using flow cytometry. Further, to evaluate the effect of TsA on transcription of genes associated with airway inflammation, we measured interleukin (IL)-8 production by enzyme-linked immunosorbent assay as well as IL-12 transcription by reverse transcription-polymerase chain reaction, in the transformed cells after stimulation with lipopolysaccharide (LPS) in the presence of TsA. Pretreatment of cells with TsA before LPS stimulation induced hyperacetylation of histones (especially in the S phase of the cell cycle), enhanced IL-8 production, and suppressed IL-12p35 and IL-12p40 mRNA accumulation. Thus we have demonstrated a useful way to detect hyperacetylation at the single-cell level, as well as the ability of an HDAC inhibitor to repress genes in epithelial cells.
authors.affiliation: Third Department of Internal Medicine, Faculty of Medicine, Tottori University, 36-1 Nishi-machi, Yonago-shi, Tottori-ken 683-8504, Japan.
authors.forename: Kyoko
authors.initials: K
authors.lastname: Iwata
authors.forename: Katsuyuki
authors.initials: K
authors.lastname: Tomita
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Sano
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Fujii
authors.forename: Akira
authors.initials: A
authors.lastname: Yamasaki
authors.forename: Eiji
authors.initials: E
authors.lastname: Shimizu
mesh_terms: D000107:Acetylation / Q000187:drug effects; D002453:Cell Cycle; D002472:Cell Transformation, Viral; D004305:Dose-Response Relationship, Drug; D004791:Enzyme Inhibitors / Q000494:pharmacology*; D004797:Enzyme-Linked Immunosorbent Assay; D005434:Flow Cytometry; D056572:Histone Deacetylase Inhibitors; D006801:Humans; D006877:Hydroxamic Acids / Q000494:pharmacology*; D016209:Interleukin-8 / Q000096:biosynthesis; D008168:Lung / Q000166:cytology*; D018613:Microscopy, Confocal; D011499:Protein Processing, Post-Translational / Q000187:drug effects; D012333:RNA, Messenger / Q000096:biosynthesis; D013539:Simian virus 40 / Q000502:physiology; D014158:Transcription, Genetic
chemical_list: D004791:Enzyme Inhibitors; D056572:Histone Deacetylase Inhibitors; D006877:Hydroxamic Acids; D016209:Interleukin-8; D012333:RNA, Messenger; C012589:trichostatin A