title: Histone deacetylase inhibitor KBH-A42 inhibits cytokine production in RAW 264.7 macrophage cells and in vivo endotoxemia model.
abstract: In light of the anti-inflammatory properties of histone deacetylase (HDAC) inhibitors, such as suberoylanilide hydroxamic acid (SAHA) and trichostatin A (TSA), we examined a new HDAC inhibitor KBH-A42 for its anti-inflammatory activities. KBH-A42 showed noteworthy anti-inflammatory properties in vitro via suppression of the production of TNF-alpha, a proinflammatory cytokine, and nitric oxide (NO), a proinflammatory effector molecule, in LPS-stimulated RAW264.7 cells and peritoneal macrophages. It also inhibited TNF-alpha production in vivo as demonstrated in a LPS-induced mouse endotoxemia model. The levels of TNF-alpha, IL-1beta, IL-6 and iNOS mRNAs determined by RT-PCR propose that the inhibition of these pro-inflammatory mediators by KBH-A42 resulted from inhibiting expression of these genes. However, the EMSA study to see the effect of KBH-A42 on the binding of NF-kappaB, a transcription factor, to a specific DNA sequence showed that the binding of NF-kappaB to DNA was not changed regardless of increasing the concentration of KBH-A42 in the presence and absence of LPS stimulation. Interestingly, DNA binding of another transcription factor AP-1 dose-dependently increased by KBH-A42. KBH-A42 differentially regulated the phosphorylation of MAP kinases. While the phosphorylation of ERK1/2 and SAPK/JNK was not affected by KBH-A42, the phosphorylation of p38 decreased by KBH-A42. These results showed that KBH-A42 inhibits production of proinflammatory cytokines in macrophages by decreasing their mRNA levels, and p38 kinase is involved in the KBH-A42-mediated inhibition.
authors.affiliation: School of Life Sciences and Biotechnology, Korea University, Seoul 136-701, Korea.
authors.forename: Yongseok
authors.initials: Y
authors.lastname: Choi
authors.forename: Song-Kyu
authors.initials: SK
authors.lastname: Park
authors.forename: Hwan Mook
authors.initials: HM
authors.lastname: Kim
authors.forename: Jong Soon
authors.initials: JS
authors.lastname: Kang
authors.forename: Yeo Dae
authors.initials: YD
authors.lastname: Yoon
authors.forename: Sang Bae
authors.initials: SB
authors.lastname: Han
authors.forename: Jeung Whan
authors.initials: JW
authors.lastname: Han
authors.forename: Jee Sun
authors.initials: JS
authors.lastname: Yang
authors.forename: Gyoonhee
authors.initials: G
authors.lastname: Han
mesh_terms: D000818:Animals; D015153:Blotting, Western; D002460:Cell Line; D002470:Cell Survival / Q000187:drug effects; D016207:Cytokines / Q000097:blood / Q000235:genetics / Q000378:metabolism*; D024202:Electrophoretic Mobility Shift Assay; D019446:Endotoxemia / Q000097:blood / Q000378:metabolism / Q000473:pathology; D004791:Enzyme Inhibitors / Q000737:chemistry / Q000494:pharmacology*; D056572:Histone Deacetylase Inhibitors; D006877:Hydroxamic Acids / Q000737:chemistry / Q000494:pharmacology*; D053583:Interleukin-1beta / Q000235:genetics / Q000378:metabolism; D015850:Interleukin-6 / Q000235:genetics / Q000378:metabolism; D008264:Macrophages / Q000166:cytology / Q000187:drug effects* / Q000378:metabolism; D051379:Mice; D019950:Mitogen-Activated Protein Kinase 1 / Q000378:metabolism; D048052:Mitogen-Activated Protein Kinase 3 / Q000378:metabolism; D020928:Mitogen-Activated Protein Kinases / Q000378:metabolism; D015394:Molecular Structure; D016328:NF-kappa B / Q000378:metabolism; D009569:Nitric Oxide / Q000378:metabolism; D052247:Nitric Oxide Synthase Type II / Q000235:genetics / Q000378:metabolism; D010766:Phosphorylation / Q000187:drug effects; D010881:Piperidones / Q000737:chemistry / Q000494:pharmacology*; D011485:Protein Binding / Q000187:drug effects; D020133:Reverse Transcriptase Polymerase Chain Reaction; D018808:Transcription Factor AP-1 / Q000378:metabolism; D014409:Tumor Necrosis Factor-alpha / Q000097:blood / Q000235:genetics / Q000378:metabolism
chemical_list: D016207:Cytokines; D004791:Enzyme Inhibitors; D056572:Histone Deacetylase Inhibitors; D006877:Hydroxamic Acids; D053583:Interleukin-1beta; D015850:Interleukin-6; C534553:KBH A42; D016328:NF-kappa B; D010881:Piperidones; D018808:Transcription Factor AP-1; D014409:Tumor Necrosis Factor-alpha; D009569:Nitric Oxide; D052247:Nitric Oxide Synthase Type II; D019950:Mitogen-Activated Protein Kinase 1; D048052:Mitogen-Activated Protein Kinase 3; D020928:Mitogen-Activated Protein Kinases