Chinese Journal of Tissue Engineering Research ›› 2019, Vol. 23 ›› Issue (11): 1680-1686.doi: 10.3969/j.issn.2095-4344.1136

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Effects of interleukin-17 and human periodontal ligament fibroblasts on the production of osteoclast-like cells in vitro

Zhou Tian, Wu Kai, Li Min, Lu Haili, Tang Haifang, Kang Na   

  1.  (State Key Laboratory of Affiliated Stomatological Hospital of Guangxi Medical University, Nanning 530021, Guangxi Zhuang Autonomous Region, China)
  • Received:2018-12-06 Online:2019-04-18 Published:2019-04-18
  • Contact: Kang Na, MD, Associate professor, State Key Laboratory of Affiliated Stomatological Hospital of Guangxi Medical University, Nanning 530021, Guangxi Zhuang Autonomous Region, China
  • About author:Zhou Tian, Master candidate, State Key Laboratory of Affiliated Stomatological Hospital of Guangxi Medical University, Nanning 530021, Guangxi Zhuang Autonomous Region, China
  • Supported by:

    the National Nature Science Foundation of China, No. 81360170 (to KN)

Abstract:

BACKGROUND: Root resorption has been shown to be a common complication during orthodontic treatment, and interleukin-17 may mediate the differentiation and maturation of osteoclasts through periodontal ligament to induce root resorption.
OBJECTIVE: To investigate the roles of interleukin-17 and human periodontal ligament fibroblasts in orthodontically induced inflammatory root resorption and the underlying mechanism.
METHODS: Passage 4-6 human periodontal ligament fibroblasts were added to the DMEM medium containing interleukin-17 at concentration of 0 or 20 μg/L for 42 hours. Cell supernatant mixed with 50 μg/L RANKL was cultured with peripheral blood mononuclear cells for 3, 5, 7 and 10 days, respectively to establish a human periodontal ligament fibroblasts and peripheral blood mononuclear cells indirect co-culture system. There were six groups: control group, peripheral blood mononuclear cells+RANKL group, peripheral blood mononuclear cells+human periodontal ligament fibroblasts group, peripheral blood mononuclear cells+human periodontal ligament fibroblasts+interleukin-17 group, peripheral blood mononuclear cells + human periodontal ligament fibroblasts+RANKL group, and peripheral blood mononuclear cells+human periodontal ligament fibroblasts+RANKL+interleukin-17 group. The expression levels of cathepsin K, matrix metalloproteinase 9 and carbonic anhydrase II mRNA induced by peripheral blood mononuclear cells in osteoclast-like cells were detected by RT-qPCR. Phalloidin staining was used to observe and count the morphology and number of fibromuscular actin rings in the cytoskeleton of osteoclast-like cells.
RESULTS AND CONCLUSIONS: RT-qPCR analysis confirmed that interleukin-17, human periodontal ligament fibroblasts and RANKL increased the expression levels of cathepsin K, matrix metalloproteinase 9 and carbonic anhydrase II compared with the control group. The results of phalloidin staining showed a significant increase in the number of actin-loop positive cells in the interleukin-17 (+) or RANKL (+) groups compared with the control group (P < 0.01). To conclude, interleukin-17 can effectively induce osteoclast precursor differentiation into osteoclast-like cells with bone resorption ability, which may be mediated through upregulation of RANKL and downregulation of osteoprotegerin by human periodontal ligament fibroblasts.

中国组织工程研究杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松组织工程

Key words: Interleukin-17, Osteoclasts, Periodontal Ligament, Tissue Engineering

CLC Number: