Prophylactic supplement with melatonin successfully suppresses the pathogenesis of periodontitis through normalizing RANKL/OPG ratio and depressing the TLR4/MyD88 signaling pathway

doi:10.1111/jpi.12464

中山醫學大學機構典藏 CSMUIR > 醫學院 > 醫學系 > 期刊論文 > Item 310902500/18990

Please use this identifier to cite or link to this item: https://ir.csmu.edu.tw:8080/ir/handle/310902500/18990

Title:	Prophylactic supplement with melatonin successfully suppresses the pathogenesis of periodontitis through normalizing RANKL/OPG ratio and depressing the TLR4/MyD88 signaling pathway
Authors:	TY, Renn YK, Huang SW, Feng HW, Wang WF, Lee CT, Lin Burnouf, T LY, Chen PF, Kao HM, Chang
Contributors:	中山醫學大學
Date:	2018-04
Issue Date:	2018-03-21T09:45:58Z (UTC)
Publisher:	RANKL/OPG signalization; TLR4/MyD88 pathway; melatonin; periodontitis; pro-inflammatory cytokines; spectral and tomographic analysis
ISSN:	07423098
Abstract:	Periodontitis (PD) is an inflammatory disease characterized by gingival inflammation and resorption of alveolar bone. Impaired receptor activator of nuclear factor-kappa B ligand/osteoprotegerin (RANKL/OPG) signaling caused by enhanced production of pro-inflammatory cytokines plays an essential role in the pathogenesis of PD. Considering melatonin possesses significant anti-inflammatory property, this study aimed to determine whether prophylactic treatment with melatonin would effectively normalize RANKL/OPG signaling, depress toll-like receptor 4/myeloid differentiation factor 88 (TLR4/MyD88)-mediated pro-inflammatory cytokine activation, and successfully suppress the pathogenesis of PD. PD was induced in adult rats by placing the ligature at molar subgingival regions. Fourteen days before PD induction, 10, 50, or 100 mg/kg of melatonin was intraperitoneally injected for consecutive 28 days. Biochemical and enzyme-linked immunosorbent assay were used to detect TLR4/MyD88 activity, RANKL, OPG, interleukin 1β, interleukin 6, and tumor necrosis factor-α levels, respectively. The extent of bone loss, bone mineral intensity, and calcium intensity was further evaluated by scanning electron microscopy, micro-computed tomography, and energy-dispersive X-ray spectroscopy. Results indicated that high RANKL/OPG ratio, TLR4/MyD88 activity, and pro-inflammatory cytokine levels were detected following PD. Impaired biochemical findings paralleled well with severe bone loss and reduced calcium intensity. However, in rats pretreated with melatonin, all above parameters were successfully returned to nearly normal levels with maximal change observed in rats receiving 100 mg/kg. As prophylactic treatment with melatonin effectively normalizes RANKL/OPG signaling by depressing TLR4/MyD88-mediated pro-inflammatory cytokine production, dietary supplement with melatonin may serve as an advanced strategy to strengthen oral health to counteract PD-induced destructive damage. © 2017 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd
URI:	https://www.doi.org/10.1111/jpi.12464 https://ir.csmu.edu.tw:8080/ir/handle/310902500/18990
Relation:	Journal of Pineal Research Volume 64, Issue 3, April 2018, 論文編號 e12464
Appears in Collections:	[醫學系] 期刊論文

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