title: Comprehensive study on the roles of released ions from biodegradable Mg-5 wt% Ca-1 wt% Zn alloy in bone regeneration.
abstract: We report here the effect of micro-environmental changes from biodegradable magnesium alloys on the activities of cells - osteoblasts, osteoclasts and macrophages - which play critical roles in each phase of the bone-regeneration process. Despite positive bone formation effects from several in vivo studies, minimal progress has been made in identifying underlying mechanisms through in vitro studies, which are currently concentrated on osteoblastic activities. The observed in vitro and in vivo results indicated that alkaline pH and released magnesium and zinc ions derived from Mg-5 wt% Ca-1 wt% Zn alloy biodegradation promote the progress of bone formation. In contrast, alkaline pH and magnesium ions remarkably suppressed osteoclastic activities and pro-inflammatory cytokine production, closely related to osteolysis and prosthesis failure. Findings from the present study conclude that the degradation of Mg-5 wt% Ca-1 wt% Zn alloys can promote new bone formation by simultaneously affecting the complex combination of variable cellular activities and phases. Copyright © 2016 John Wiley & Sons, Ltd.
authors.affiliation: Biomedical Research Institute, Korea Institute of Science and Technology, Seoul, Republic of Korea.
authors.forename: Hee-Kyoung
authors.initials: HK
authors.lastname: Kim
authors.affiliation: Biomedical Research Institute, Korea Institute of Science and Technology, Seoul, Republic of Korea.
authors.forename: Hyung-Seop
authors.initials: HS
authors.lastname: Han
authors.affiliation: Department of Orthopaedic Surgery, Asan Medical Centre, University of Ulsan College of Medicine, Seoul, Republic of Korea.
authors.forename: Kang-Sik
authors.initials: KS
authors.lastname: Lee
authors.affiliation: Department of Orthopaedic Surgery, Asan Medical Centre, University of Ulsan College of Medicine, Seoul, Republic of Korea.
authors.forename: Dong-Ho
authors.initials: DH
authors.lastname: Lee
authors.affiliation: School of Advanced Materials Engineering, Kookmin University, Seoul, South Korea.
authors.forename: Jee Wook
authors.initials: JW
authors.lastname: Lee
authors.affiliation: Biomedical Research Institute, Korea Institute of Science and Technology, Seoul, Republic of Korea.
authors.forename: Hojeong
authors.initials: H
authors.lastname: Jeon
authors.affiliation: R&D Centre, U&I Corporation, Uijongbu, Republic of Korea.
authors.forename: Sung-Yoon
authors.initials: SY
authors.lastname: Cho
authors.affiliation: Biomedical Research Institute, Korea Institute of Science and Technology, Seoul, Republic of Korea.
authors.forename: Hyoung-Jin
authors.initials: HJ
authors.lastname: Roh
authors.affiliation: Biomedical Research Institute, Korea Institute of Science and Technology, Seoul, Republic of Korea.
authors.forename: Yu-Chan
authors.initials: YC
authors.lastname: Kim
authors.affiliation: Biomedical Research Institute, Korea Institute of Science and Technology, Seoul, Republic of Korea.
authors.forename: Hyun-Kwang
authors.initials: HK
authors.lastname: Seok
mesh_terms: D000469:Alkaline Phosphatase / Q000378:metabolism; D000497:Alloys / Q000494:pharmacology*; D000818:Animals; D001861:Bone Regeneration / Q000187:drug effects*; D002118:Calcium / Q000494:pharmacology*; D002460:Cell Line; D049109:Cell Proliferation / Q000187:drug effects; D005109:Extracellular Matrix / Q000187:drug effects / Q000378:metabolism; D006801:Humans; D018836:Inflammation Mediators / Q000378:metabolism; D007477:Ions; D008274:Magnesium / Q000494:pharmacology*; D051379:Mice; D010010:Osteoclasts / Q000187:drug effects / Q000378:metabolism; D010012:Osteogenesis / Q000187:drug effects; D000067996:RAW 264.7 Cells; D011817:Rabbits; D015032:Zinc / Q000494:pharmacology*
chemical_list: D000497:Alloys; D018836:Inflammation Mediators; D007477:Ions; D000469:Alkaline Phosphatase; D008274:Magnesium; D015032:Zinc; D002118:Calcium
keywords: Osteoblast; biodegradable; bone regeneration; macrophages; magnesium; osteoclast