The effects of microwave irradiation on the proliferation of cultured human keloid-derived fibroblasts and the mechanism involved
10.3760/cma.j.issn.0254-1424.2017.01.001
- VernacularTitle:微波辐射减轻瘢痕形成的疗效及其作用机制研究
- Author:
Yanting LI
;
Xiaoyan SHEN
;
Yun LI
;
Manlin CAO
- Keywords:
Keloids;
Fibroblasts;
Microwaves;
Collagen-1;
JNK protein
- From:
Chinese Journal of Physical Medicine and Rehabilitation
2017;39(1):1-4
- CountryChina
- Language:Chinese
-
Abstract:
Objective To explore the effects of microwave irradiation on the proliferation of keloid-derived fibroblasts so as to analyze the expression of collagen-1 and the activation of the signaling pathway involved.Methods Cells from a human keloid scar were cultured in vitro and randomly divided into a control group withont any intervention,a 10 mW/cm2 microwave irradiation (10-MI) group and a 20 mW/cm2 microwave irradiation (20-MI) group.Aliquots of the latter 2 groups were irradiated at their corresponding intensities for 5 min,15 min and 30 min.The growth of fibroblasts was evaluated using MTT assay.The expression of collagen-1 and changes in the phosphorylation of protein JNK were detected using western blotting.Results Compared with the control group,no significant differences in the average growth of the keloid-derived fibroblasts were observed in the 10-MI group,but significant differences were observed in the 20-MI group and among the three sub-groups irradiated for different durations.The expression of type 1 collagen was significantly down-regulated after irradiation in a time-dependent manner.After microwave radiation at 20 mW/cm2,JNK was significantly activated compared to the control group at the different time points.Conclusions Microwave irradiation at 20 mW/cm2 can significantly inhibit the proliferation of keloid-derived fibroblasts and the down-regulalion is correlated with the irradiation's duration.It can also significantly inhibit collagen-1 expression and relieve scar formation through activating the JNK signal pathway.
