Silk sericin protein of tropical tasar silkworm inhibits UVB-induced apoptosis in human skin keratinocytes

被引:114
|
作者
Dash, Rupesh [1 ]
Mandal, Mahitosh [2 ]
Ghosh, Sudip K. [1 ]
Kundu, S. C. [1 ]
机构
[1] Indian Inst Technol, Dept Biotechnol, Kharagpur 721302, W Bengal, India
[2] Indian Inst Technol, Sch Med Sci & Technol, Kharagpur, W Bengal, India
关键词
sericin; keratinocytes; UVB; H(2)O2;
D O I
10.1007/s11010-008-9702-z
中图分类号
Q2 [细胞生物学];
学科分类号
071009 ; 090102 ;
摘要
The silk protein sericin has been identified as a potent antioxidant and photoprotective agent against ultraviolet B (UVB) irradiation in mouse skin model. In this study, we have investigated the anti-apoptotic effect of sericin in UVB (30 mJ/cm(2))-irradiated human keratinocytes. Flow cytometry analysis has shown that pre-treatment with sericin inhibits UVB-induced apoptosis. The pre-treatment with sericin suppresses bax expression, up-regulates the expression of bcl-2, prevents both the activation of caspase-3 and cleavage of Poly (ADP-ribose) polymerase. Generation of intracellular hydrogen peroxide in UVB-treated keratinocytes is inhibited through pre-treatment with sericin suggesting that sericin probably prevents mitochondrial damage.
引用
收藏
页码:111 / 119
页数:9
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