Effect of osteoblast autophagy induced by wear particles on secretion of inflammatory cytokines TNF-α and IL-6
10.16571/j.cnki.1008-8199.2018.04.006
- VernacularTitle:磨损微粒诱导的成骨细胞自噬对肿瘤坏死因子-α及白细胞介素-6分泌的影响
- Author:
Kai-Wen XUE
1
;
Mao-Sheng BAI
;
Jian-Ning ZHAO
Author Information
1. 南京大学医学院附属金陵医院(南京军区南京总医院)骨科
- Keywords:
wear particles;
autophagy;
tumor necrosis factor alpha;
Interleukin 6
- From:
Journal of Medical Postgraduates
2018;31(4):368-372
- CountryChina
- Language:Chinese
-
Abstract:
Objective The relationship between osteoblast autophagy induced by wear particles and secretion of inflammatory cytokines has not been illuminated.The purpose of this study was to investigate the effect of wear particles on the secretion of TNF -α and IL-6 by autophagy of osteoblasts in aseptic loosening. Methods The mouse MC3T3-E1 osteoblasts in logarithmic growth phase were divided into 5 groups:control group(in α-MEM medium),CoCrMo particle group(100 μg/mL CoCrMo particles was added in α-MEM medium),3-MA group(10 mmol/L autophagy inhibitor 3-MA prestimulated osteoblasts in α-MEM medium,3h later 100 μg/mL CoCrMo particles were added),the expression of autophagy marker protein LC-3 in osteoblasts was detected by Western blotting, and the levels of TNF-αand IL-6 were detected by ELISA. Results Compared with the control group,the expression level of auto-phagy marker protein LC-3 was significantly increased in CoCrMo particles group(P<0.05).Compared with CoCrMo particles group,the expression level of LC-3 in 3-MA group was significantly decreased(P<0.05).Compared with control group TNF-α[(0.95± 0.00)pg/mL]and IL-6[(4.67±0.23)pg/mL], CoCrMo particles group TNF-α[(10.35±3.63)pg/mL]and IL-6[(14.27±1.07)pg/mL]secretion level was significantly increased(P<0.05),compared with CoCrMo particles group,the effects of 10 mmol/L 3-MA group to TNF-α[(13.13±5.08)(14.71±5.46)pg/mL]and IL-6[(15.31±0.88),(16.75±3.87)pg/mL]secretion were not significant, while 10 mmol/L 3-MA group TNF-α[The secretion levels of(302.61±45.63)pg/mL]and IL-6[(216.67±27.71)pg/mL]in-creased significantly(P<0.01). Conclusion The osteoblast autophagy induced by CoCrMo particles can inhibit the secretion of in -flammatory cytokines TNF-αand IL-6 in osteoblasts.
