Dose-response assessment of chemically modified curcumin in experimental periodontitis

Author(s)

Brandao, Dayane de Almeida ^[1] ; Spolidorio, Luis Carlos ^[2] ; Johnson, Francis ^{[3, 4]} ; Golub, Lorne M. ^[5] ; Guimaraes-Stabili, Morgana Rodrigues ^[1] ; Rossa Jr, Carlos

Affiliation

^[1] UNESP, Dept Diag & Surg, Sch Dent Araraquara, Araraquara - Brazil

^[2] UNESP, Dept Physiol & Pathol, Sch Dent Araraquara, Araraquara - Brazil

^[3] SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 - USA

^[4] SUNY Stony Brook, Dept Pharmacol Sci, Stony Brook, NY 11794 - USA

^[5] SUNY Stony Brook, Sch Dent Med, Dept Oral Biol & Pathol, Stony Brook, NY 11794 - USA

• Document type: Journal article
• Source: Journal of Periodontology; v. 90, n. 5, p. 535-545, MAY 2019.
• Web of Science Citations: 0

Abstract

Background CMC2.24, a novel tri-ketonic chemically modified compound based on natural di-ketonic curcumin, has been shown to reduce bone loss and inflammatory mediators in experimental periodontitis, however, a potential dose-response relationship was not determined. The purpose of this study was to assess the effects of different doses of CMC2.24 on inflammation and bone resorption in vivo and also to describe on the effects of CMC2.24 on macrophage response. Methods CMC2.24 was administered daily to animals for 28 days by oral gavage, at the following doses: 0 (control), 1, 3, 10, and 30 mg/kg of body weight. Experimental periodontitis was induced by injections of lipopolysaccharide (LPS) into the gingival tissues. Outcomes assessed were bone resorption, detection of tartrate-resistant acid phosphatase, and determination of gene expression. In vitro, macrophages (RAW264.7) were treated with different concentrations of CMC2.24: 1, 3, 10, and 30 mu M and then subjected to different activation stimuli. Gene expression, phagocytic activity, production of reactive oxygen species (ROS) and cytokine production were evaluated. Results CMC2.24 inhibited bone resorption, osteoclastogenesis, and tumor necrosis factor (TNF)-alpha expression in vivo. These beneficial responses reached maximum levels at a dose of 1 mg/kg, i.e. no dose-dependent effect. In vitro, CMC2.24 reduced the production of TNF-alpha and interleukin-10, inhibited phagocytic activity and stimulated production of ROS. A dose-dependent effect was observed only for ROS production. Conclusion Low doses of CMC2.24 (1 mg/kg/day) administered orally were sufficient to significantly inhibit alveolar bone resorption associated with the experimental periodontal disease; whereas in vitro macrophage inflammatory gene expression and phagocytosis were reduced, whereas production of ROS was stimulated. (AU)

• FAPESP's process: 10/19660-2 - Biological mechanisms of curcumin-mediated modulation of osteoclastogenesis, bone resorption and repair
• Grantee: Morgana Rodrigues Guimarães Stabili
• Support Opportunities: Scholarships in Brazil - Post-Doctoral