Oral supplementation of sea cucumber and its hydrolysate mitigates ultraviolet A ‐induced photoaging in hairless mice

Author(s):  
Shuyu Liu ◽  
Yi Lu ◽  
Masahiro Kurono ◽  
Yoshiharu Matahira ◽  
Yuki Manabe ◽  
...  
2018 ◽  
Vol 2018 ◽  
pp. 1-11 ◽  
Author(s):  
Hui Hua ◽  
Jiawei Cheng ◽  
Wenbo Bu ◽  
Juan Liu ◽  
Weiwei Ma ◽  
...  

Aim. To determine whether 5-aminolevulinic acid-based photodynamic therapy (ALA-PDT) is effective in combating ultraviolet A- (UVA-) induced oxidative photodamage of hairless mice skin in vivo and human epidermal keratinocytes in vitro. Methods. In in vitro experiments, the human keratinocyte cell line (HaCaT cells) was divided into two groups: the experimental group was treated with ALA-PDT and the control group was left untreated. Then, the experimental group and the control group of cells were exposed to 10 J/m2 of UVA radiation. ROS, O2− species, and MMP were determined by fluorescence microscopy; p53, OGG1, and XPC were determined by Western blot analysis; apoptosis was determined by flow cytometry; and 8-oxo-dG was determined by immunofluorescence. Moreover, HaCaT cells were also treated with ALA-PDT. Then, SOD1 and SOD2 were examined by Western blot analysis. In in vivo experiments, the dorsal skin of hairless mice was treated with ALA-PDT or saline-PDT, and then, they were exposed to 20 J/m2 UVA light. The compound 8-oxo-dG was detected by immunofluorescence. Conclusion. In human epidermal keratinocytes and hairless mice skin, UVA-induced oxidative damage can be prevented effectively with ALA-PDT pretreatment.


1996 ◽  
Vol 12 (1) ◽  
pp. 7-11 ◽  
Author(s):  
J. M. Menter ◽  
R. M. Sayre ◽  
A. A. Etemadi ◽  
P. P. Agin ◽  
I. Wills

2009 ◽  
Vol 64 (4) ◽  
pp. 471-478 ◽  
Author(s):  
Felix M. Barker ◽  
Pierrette Dayhaw-Barker ◽  
P. Donald Forbes ◽  
Ronald E. Davies

1996 ◽  
Vol 12 (5) ◽  
pp. 222-222
Author(s):  
Menter JM ◽  
Sayre RM ◽  
AA Etemadi ◽  
PP Agin ◽  
I Willis ◽  
...  

Author(s):  
Delma P. Thomas ◽  
Dianne E. Godar

Ultraviolet radiation (UVR) from all three waveband regions of the UV spectrum, UVA (320-400 nm), UVB (290-320 nm), and UVC (200-290 nm), can be emitted by some medical devices and consumer products. Sunlamps can expose the blood to a considerable amount of UVR, particularly UVA and/or UVB. The percent transmission of each waveband through the epidermis to the dermis, which contains blood, increases in the order of increasing wavelength: UVC (10%) < UVB (20%) < UVA (30%). To investigate the effects of UVR on white blood cells, we chose transmission electron microscopy to examine the ultrastructure changes in L5178Y-R murine lymphoma cells.


1998 ◽  
Vol 138 (6) ◽  
pp. 1100-1101 ◽  
Author(s):  
Wolf ◽  
SchOllnast ◽  
Hofer ◽  
Smolle ◽  
Kerl

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