PMID- 25397676 OWN - NLM STAT- MEDLINE DCOM- 20150708 LR - 20220321 IS - 1520-6025 (Electronic) IS - 0163-3864 (Linking) VI - 77 IP - 11 DP - 2014 Nov 26 TI - Formononetin attenuates osteoclastogenesis via suppressing the RANKL-induced activation of NF-kappaB, c-Fos, and nuclear factor of activated T-cells cytoplasmic 1 signaling pathway. PG - 2423-31 LID - 10.1021/np500417d [doi] AB - Formononetin (1), a plant-derived phytoestrogen, possesses bone protective properties. To address the potential therapeutic efficacy and mechanism of action of 1, we investigated its antiosteoclastogenic activity and its effect on nuclear factor-kappaB ligand (RANKL)-induced bone-marrow-derived macrophages (BMMs). Compound 1 markedly inhibited RANKL-induced osteoclast differentiation in the absence of cytotoxicity, by regulating the expression of osteoprotegerin (OPG) and RANKL in BMMs and in cocultured osteoblasts. Compound 1 significantly inhibited RANKL-induced tumor necrosis factor (TNF)-alpha, interleukin (IL)-1beta, IL-6, monocyte chemoattractant protein-1 (MCP-1), regulated on activation normal T cell expressed and secreted (RANTES), and macrophage inflammatory protein-1alpha (MIP-1alpha) in a concentration-dependent manner. These effects were accompanied by a decrease in RANKL-induced activation of the NF-kappaB p65 subunit, degradation of inhibitor kappaBalpha (IkappaBalpha), induction of NF-kappaB, and phosphorylation of AKT, extracellular-signal regulated kinase (ERK), c-Jun N-terminal kinase (JNK), and p38 mitogen-activated protein kinase (p38 MAPK). NF-kappaB siRNA suppressed AKT, ERK, JNK, and p38 MAPK phosphorylation. Furthermore, 1 significantly suppressed c-Fos and nuclear factor of activated T-cells cytoplasmic 1 (NFATc1), key transcription factors during osteoclastogenesis. SP600125, a specific inhibitor of JNK, reduced RANKL-induced expression of phospho-c-Jun, c-Fos, and NFATc1 and inhibited osteoclast formation. These results suggested that 1 acted as an antiresorption agent by blocking osteoclast activation. FAU - Huh, Jeong-Eun AU - Huh JE AD - Oriental Medicine Research Center for Bone and Joint Disease, East-West Bone & Joint Research Institute, Kyung Hee University , 149, Sangil-dong, Gangdong-gu, Seoul, Korea. FAU - Lee, Wong In AU - Lee WI FAU - Kang, Jung Won AU - Kang JW FAU - Nam, Dongwoo AU - Nam D FAU - Choi, Do-Young AU - Choi DY FAU - Park, Dong-Suk AU - Park DS FAU - Lee, Sang Hoon AU - Lee SH FAU - Lee, Jae-Dong AU - Lee JD LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20141114 PL - United States TA - J Nat Prod JT - Journal of natural products JID - 7906882 RN - 0 (Chemokine CCL2) RN - 0 (Interleukin-6) RN - 0 (Isoflavones) RN - 0 (NF-kappa B) RN - 0 (Phytoestrogens) RN - 0 (Proto-Oncogene Proteins c-fos) RN - 0 (RANK Ligand) RN - 295DQC67BJ (formononetin) RN - EC 2.7.11.24 (JNK Mitogen-Activated Protein Kinases) RN - EC 2.7.11.24 (Mitogen-Activated Protein Kinases) RN - EC 2.7.11.24 (p38 Mitogen-Activated Protein Kinases) SB - IM MH - Chemokine CCL2 MH - Interleukin-6/metabolism MH - Isoflavones/chemistry/*pharmacology MH - JNK Mitogen-Activated Protein Kinases/metabolism MH - Macrophages/drug effects MH - Mitogen-Activated Protein Kinases/metabolism MH - Molecular Structure MH - NF-kappa B/*antagonists & inhibitors MH - Osteoblasts/drug effects MH - Osteoclasts/drug effects MH - Phytoestrogens/chemistry/*pharmacology MH - Proto-Oncogene Proteins c-fos/drug effects MH - RANK Ligand/pharmacology MH - Signal Transduction/drug effects MH - p38 Mitogen-Activated Protein Kinases/metabolism EDAT- 2014/11/15 06:00 MHDA- 2015/07/15 06:00 CRDT- 2014/11/15 06:00 PHST- 2014/11/15 06:00 [entrez] PHST- 2014/11/15 06:00 [pubmed] PHST- 2015/07/15 06:00 [medline] AID - 10.1021/np500417d [doi] PST - ppublish SO - J Nat Prod. 2014 Nov 26;77(11):2423-31. doi: 10.1021/np500417d. Epub 2014 Nov 14.