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Local administration of nuclear factor of activated T cells (NFAT) c1 inhibitor to suppress early resorption and inflammation induced by bone morphogenetic protein‐2
Author(s) -
Kim Ri Youn,
Seong Yeju,
Cho Tae Hyung,
Lee Beomseok,
Kim In Sook,
Hwang Soon Jung
Publication year - 2018
Publication title -
journal of biomedical materials research part a
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.849
H-Index - 150
eISSN - 1552-4965
pISSN - 1549-3296
DOI - 10.1002/jbm.a.36332
Subject(s) - nfat , osteoclast , bone morphogenetic protein 2 , bone resorption , bone healing , inflammation , calvaria , pharmacology , materials science , resorption , bone morphogenetic protein , tumor necrosis factor alpha , in vivo , medicine , endocrinology , chemistry , in vitro , calcineurin , biology , anatomy , biochemistry , receptor , transplantation , gene , microbiology and biotechnology
Nuclear factor of activated T cells (NFAT)‐c1 is known as a key regulator in osteoclast differentiation and immune response. This study is a follow‐up to our previous study showing the antiresorptive activity of VIVIT, a peptide type NFATc1 inhibitor, using absorbable collagen sponge (ACS). This study aimed to investigate the effective concentration range of local VIVIT that suppresses early excessive osteoclast activation and inflammation induced by high‐dose recombinant human bone morphogenetic protein (rhBMP)‐2 and concomitantly enhances bone healing in a rat critical‐sized calvaria defect model. High‐dose rhBMP‐2 (40 μg/defect) alone significantly increased in vivo osteoclast activation and expression of the inflammatory cytokines interleukin‐1β and transforming necrosis factor‐α on the scaffold at 7 days after surgery. However, rhBMP‐2 had no direct effect on osteoclast activation in vitro . Osteoclast activation by rhBMP‐2 was significantly suppressed by combined treatment with VIVIT at concentrations of 75 and 150 μ M , but not at 15 μ M , whereas suppression of inflammation occurred at all doses of VIVIT. Microcomputed tomography at 4 and 8 weeks after implantation revealed that the combination of rhBMP‐2 and VIVIT at 75 μ M VIVIT led to a greater bone fraction at the initial defect area, compared with rhBMP‐2 alone. These findings revealed that local administration of VIVIT at certain concentrations has multiple positive effects that weaken early excessive osteoimmunological responses and enhance bone healing after rhBMP‐2 administration. VIVIT has the potential to expand the therapeutic area of high‐dose rhBMP‐2 therapy to inflammatory bone loss. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 106A: 1299–1310, 2018.