Changes in chemokine receptor 4, interleukin-6, and collagen X expression in the ATDC5 cell line stimulated by cyclic tensile strain and stromal cell-derived factor-1
10.7518/hxkq.2014.06.015
- VernacularTitle:基质细胞衍生因子-1刺激对周期性牵张力作用下ATDC5细胞的趋化因子受体4、白介素-6、胶原X表达的影响
- Author:
Bin KUANG
1
;
Qingyu WANG
;
Rong SONG
;
Yanyan SUN
;
Zhiguo CHAI
;
Yinzhong DUAN
;
Juan DAI
Author Information
1. 兰州市第一人民医院口腔科
- Keywords:
temporomandibular joint osteoarthritis;
stromal cell-derived factor-1;
chemokine receptor 4;
cyclic tensile strain
- From:
West China Journal of Stomatology
2014;(6):592-595
- CountryChina
- Language:Chinese
-
Abstract:
Objective This study further explores the stromal cell-derived factor-1 (SDF-1)/chemokine receptor 4 (CXCR4) signaling axis mechanism in temporomandibular joint osteoarthritis (OA) by detecting the changes in CXCR4, interleukin (IL)-6, and collagen X expression in the ATDC5 cell line stimulated by the cyclic tensile strain and SDF-1. Methods Insulin-transferrin- selenium(ITS) was used to induce ATDC5 cells to differentiate into chondrocyte-like cells. After three weeks, the cells were divided into two groups: those with and without cyclic tensile strain. These groups were further divided into the negative control and SDF-1 groups. Strain force of 20% was applied. After 12 h, the total proteins were extracted from cells of the four groups, and Western blot analysis was used to detect the changes in CXCR4, IL-6, and collagen X expression. Results SDF-1 could enhance CXCR4, IL-6, and collagen X expressions in the chondrocytes, and 20% tensile strain force could further upregulate the three factors. Conclusion Under abnormal tensile force, SDF-1 can upregulate its specific receptor CXCR4, thus increasing its binding efficiency and resulting in the activation of the SDF-1/CXCR4 axis. This condition enhances the expressions of IL-6 and other inflammatory factors and directly damages to cartilage tissue. Such damage directly promotes chondrocyte hypertrophy, which enhances collagen X expression.
