PMID- 25832610 OWN - NLM STAT- MEDLINE DCOM- 20151124 LR - 20150815 IS - 1462-0332 (Electronic) IS - 1462-0324 (Linking) VI - 54 IP - 9 DP - 2015 Sep TI - Inhibiting histone deacetylase 1 suppresses both inflammation and bone loss in arthritis. PG - 1713-23 LID - 10.1093/rheumatology/kev022 [doi] AB - OBJECTIVE: Histone deacetylase 1 (HDAC1) is highly expressed in the synovium of RA patients. Thus we aimed to investigate a novel HDAC inhibitor (HDACi), NW-21, designed to target HDAC1. The effect of NW-21 on osteoclast formation and activity, cytokine and chemokine expression in vitro and arthritis in mice was assessed. METHODS: The effects on human osteoclast formation and activity derived from human blood monocytes stimulated with receptor activator of nuclear factor kappaB ligand (RANKL) and M-CSF were assessed. The anti-inflammatory activity of NW-21 was assessed using human monocytes stimulated with either TNF-alpha or lipopolysaccharide for 24 h. mRNA expression of monocyte chemotactic protein 1 (MCP-1), TNF-alpha, macrophage inflammatory protein 1alpha (MIP-1alpha), IL-1 and RANTES (regulated on activation, normal T cell expressed and secreted) was assessed. The effect of NW-21 in the collagen antibody-induced arthritis model was assessed following daily oral administration at 5 mg/kg/day. The HDAC1 inhibitors NW-21 and MS-275 were compared with a broad-acting HDACi, 1179.4b. Effects on inflammation and bone were assessed using paw inflammation scoring, histology and live animal micro-CT. RESULTS: NW-21 suppressed osteoclast formation and activity as well as significantly reducing mRNA expression of MCP-1 and MIP-1alpha in monocytes stimulated by lipopolysaccharide or TNF-alpha (P < 0.05) in vitro. Only inhibitors that targeted HDAC1 (NW-21 and MS-275) reduced inflammation and bone loss in the arthritis model. CONCLUSION: The results indicate that inhibitors targeting HDAC1, such as NW-21 and MS-275, may be useful for treating RA, as such drugs can simultaneously target both inflammation and bone resorption. CI - (c) The Author 2015. Published by Oxford University Press on behalf of the British Society for Rheumatology. All rights reserved. For Permissions, please email: journals.permissions@oup.com. FAU - Cantley, Melissa D AU - Cantley MD AD - Discipline of Anatomy and Pathology, School of Medical Sciences, University of Adelaide, Adelaide, SA, melissa.cantley@adelaide.edu.au. FAU - Fairlie, David P AU - Fairlie DP AD - Institute for Molecular Bioscience, University of Queensland, Brisbane, QLD, and. FAU - Bartold, P Mark AU - Bartold PM AD - Colgate Australian Clinical Dental Research Centre, School of Dentistry, University of Adelaide, Adelaide, SA, Australia. FAU - Marino, Victor AU - Marino V AD - Colgate Australian Clinical Dental Research Centre, School of Dentistry, University of Adelaide, Adelaide, SA, Australia. FAU - Gupta, Praveer K AU - Gupta PK AD - Institute for Molecular Bioscience, University of Queensland, Brisbane, QLD, and. FAU - Haynes, David R AU - Haynes DR AD - Discipline of Anatomy and Pathology, School of Medical Sciences, University of Adelaide, Adelaide, SA. LA - eng PT - Comparative Study PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20150331 PL - England TA - Rheumatology (Oxford) JT - Rheumatology (Oxford, England) JID - 100883501 RN - 0 (Benzamides) RN - 0 (Chemokines) RN - 0 (Cytokines) RN - 0 (Histone Deacetylase Inhibitors) RN - 0 (Hydroxamic Acids) RN - 0 (Lipopolysaccharides) RN - 0 (NW-21 compound) RN - 0 (Pyridines) RN - 0 (Tumor Necrosis Factor-alpha) RN - 1ZNY4FKK9H (entinostat) RN - EC 3.5.1.98 (Histone Deacetylase 1) SB - IM MH - Animals MH - Arthritis, Experimental/*complications/drug therapy MH - Benzamides/*pharmacology/therapeutic use MH - Bone Resorption/*prevention & control MH - Cells, Cultured MH - Chemokines/metabolism MH - Cytokines/metabolism MH - Disease Models, Animal MH - Female MH - Histone Deacetylase 1/*antagonists & inhibitors MH - Histone Deacetylase Inhibitors/*pharmacology/therapeutic use MH - Humans MH - Hydroxamic Acids/pharmacology/therapeutic use MH - In Vitro Techniques MH - Inflammation/*prevention & control MH - Lipopolysaccharides/pharmacology MH - Mice MH - Mice, Inbred BALB C MH - Monocytes/drug effects/metabolism/pathology MH - Osteoclasts/drug effects/metabolism/pathology MH - Pyridines/*pharmacology/therapeutic use MH - Tumor Necrosis Factor-alpha/pharmacology OTO - NOTNLM OT - bone loss OT - collagen antibody-induced arthritis OT - histone deacetylase 1 OT - inflammation OT - osteoclasts EDAT- 2015/04/03 06:00 MHDA- 2015/12/15 06:00 CRDT- 2015/04/03 06:00 PHST- 2014/05/05 00:00 [received] PHST- 2015/04/03 06:00 [entrez] PHST- 2015/04/03 06:00 [pubmed] PHST- 2015/12/15 06:00 [medline] AID - kev022 [pii] AID - 10.1093/rheumatology/kev022 [doi] PST - ppublish SO - Rheumatology (Oxford). 2015 Sep;54(9):1713-23. doi: 10.1093/rheumatology/kev022. Epub 2015 Mar 31.