PMID- 35014674 OWN - NLM STAT- MEDLINE DCOM- 20220328 LR - 20220328 IS - 1791-3004 (Electronic) IS - 1791-2997 (Print) IS - 1791-2997 (Linking) VI - 25 IP - 3 DP - 2022 Mar TI - C‑X‑C receptor 7 agonist acts as a C‑X‑C motif chemokine ligand 12 inhibitor to ameliorate osteoclastogenesis and bone resorption. LID - 78 [pii] LID - 10.3892/mmr.2022.12594 [doi] AB - The C‑X‑C receptor (CXCR) 7 agonist, VUF11207, is a chemical compound that binds specifically to CXCR7, and negatively regulates C‑X‑C motif chemokine ligand 12 (CXCL12) and CXCR4‑induced cellular events. Lipopolysaccharide (LPS) can induce inflammatory cytokines and pathological bone loss. LPS also induces expression of CXCL12, enhancing sensitivity to receptor activator of NF‑kappaB ligand (RANKL) and tumor necrosis factor‑alpha (TNF‑alpha) in vivo. RANKL and TNF‑alpha induce the differentiation of osteoclasts into osteoclast precursors and bone resorption. The current study was performed to examine the effects of a CXCR7 agonist on osteoclastogenesis and bone resorption induced by LPS in vivo. In addition, the mechanisms underlying these in vivo effects were investigated by in vitro experiments. Eight‑week‑old male C57BL/6J mice were subcutaneously injected over the calvariae with LPS alone or LPS and CXCR7 agonist. After sacrifice, the number of osteoclasts and the bone resorption area were measured. In vitro experiments were performed to investigate the effects of CXCL12 and CXCR7 agonist on osteoclastogenesis induced by RANKL and TNF‑alpha. Mice injected with LPS and CXCR7 agonist showed significantly reduced osteoclastogenesis and bone resorption compared with mice injected with LPS alone. Moreover, the CXCR7 agonist inhibited CXCL12 enhancement of RANKL‑ and TNF‑alpha‑induced osteoclastogenesis in vitro. Thus, CXCR7 agonist inhibited LPS‑induced osteoclast‑associated cytokines, such as RANKL and TNF‑alpha, as well as RANKL‑ and TNF‑alpha‑induced osteoclastogenesis in vitro by modulating CXCL12‑mediated enhancement of osteoclastogenesis. In conclusion, CXCR7 agonist reduced CXCL12‑mediated osteoclastogenesis and bone resorption. FAU - Nugraha, Alexander Patera AU - Nugraha AP AD - Division of Orthodontics and Dentofacial Orthopedics, Tohoku University Graduate School of Dentistry, Aoba‑ku, Sendai, Miyagi 980‑8575, Japan. FAU - Kitaura, Hideki AU - Kitaura H AD - Division of Orthodontics and Dentofacial Orthopedics, Tohoku University Graduate School of Dentistry, Aoba‑ku, Sendai, Miyagi 980‑8575, Japan. FAU - Ohori, Fumitoshi AU - Ohori F AD - Division of Orthodontics and Dentofacial Orthopedics, Tohoku University Graduate School of Dentistry, Aoba‑ku, Sendai, Miyagi 980‑8575, Japan. FAU - Pramusita, Adya AU - Pramusita A AD - Division of Orthodontics and Dentofacial Orthopedics, Tohoku University Graduate School of Dentistry, Aoba‑ku, Sendai, Miyagi 980‑8575, Japan. FAU - Ogawa, Saika AU - Ogawa S AD - Division of Orthodontics and Dentofacial Orthopedics, Tohoku University Graduate School of Dentistry, Aoba‑ku, Sendai, Miyagi 980‑8575, Japan. FAU - Noguchi, Takahiro AU - Noguchi T AD - Division of Orthodontics and Dentofacial Orthopedics, Tohoku University Graduate School of Dentistry, Aoba‑ku, Sendai, Miyagi 980‑8575, Japan. FAU - Marahleh, Aseel AU - Marahleh A AD - Division of Orthodontics and Dentofacial Orthopedics, Tohoku University Graduate School of Dentistry, Aoba‑ku, Sendai, Miyagi 980‑8575, Japan. FAU - Nara, Yasuhiko AU - Nara Y AD - Division of Orthodontics and Dentofacial Orthopedics, Tohoku University Graduate School of Dentistry, Aoba‑ku, Sendai, Miyagi 980‑8575, Japan. FAU - Kinjo, Ria AU - Kinjo R AD - Division of Orthodontics and Dentofacial Orthopedics, Tohoku University Graduate School of Dentistry, Aoba‑ku, Sendai, Miyagi 980‑8575, Japan. FAU - Mizoguchi, Itaru AU - Mizoguchi I AD - Division of Orthodontics and Dentofacial Orthopedics, Tohoku University Graduate School of Dentistry, Aoba‑ku, Sendai, Miyagi 980‑8575, Japan. LA - eng PT - Journal Article DEP - 20220111 PL - Greece TA - Mol Med Rep JT - Molecular medicine reports JID - 101475259 RN - 0 (Biomarkers) RN - 0 (Chemokine CXCL12) RN - 0 (Cmkor1 protein, mouse) RN - 0 (Cytokines) RN - 0 (Lipopolysaccharides) RN - 0 (RANK Ligand) RN - 0 (Receptors, CXCR) RN - EC 2.7.11.24 (Mitogen-Activated Protein Kinases) SB - IM MH - Animals MH - Biomarkers MH - Bone Resorption/diagnosis/drug therapy/etiology/*metabolism MH - Cells, Cultured MH - Chemokine CXCL12/*antagonists & inhibitors MH - Cytokines/metabolism MH - Disease Models, Animal MH - Lipopolysaccharides/immunology MH - Male MH - Mice MH - Mitogen-Activated Protein Kinases MH - Osteogenesis/*drug effects MH - Phosphorylation MH - RANK Ligand/metabolism MH - Receptors, CXCR/*antagonists & inhibitors MH - X-Ray Microtomography PMC - PMC8778739 OTO - NOTNLM OT - C‑X‑C motif chemokine ligand 12 OT - C‑X‑C receptor 7 agonist OT - osteoclast OT - receptor activator of NF‑kappaB ligand OT - tumor necrosis factor‑alpha COIS- The authors declare that they have no competing interests. EDAT- 2022/01/12 06:00 MHDA- 2022/03/29 06:00 PMCR- 2022/01/11 CRDT- 2022/01/11 08:48 PHST- 2021/09/06 00:00 [received] PHST- 2021/12/09 00:00 [accepted] PHST- 2022/01/11 08:48 [entrez] PHST- 2022/01/12 06:00 [pubmed] PHST- 2022/03/29 06:00 [medline] PHST- 2022/01/11 00:00 [pmc-release] AID - 78 [pii] AID - MMR-25-03-12594 [pii] AID - 10.3892/mmr.2022.12594 [doi] PST - ppublish SO - Mol Med Rep. 2022 Mar;25(3):78. doi: 10.3892/mmr.2022.12594. Epub 2022 Jan 11.