Abstract
Gsdma3, a newly found gene, is expressed restrictedly in mouse skin keratinocytes and gastrointestinal tract. But until now, there is little information on the regulation and the function of Gsdma3 in skin keratinocytes. In our previous study, we found that Gsdma3 mutation resulted in a decrease in catagen-associated apoptosis of hair follicle keratinocytes. Apoptosis of skin keratinocytes is strictly regulated by a series of signal pathways, among of which, tumor necrosis factor (TNF)-α-induced signal pathway has been extensively studied. To further investigate the role and the pathway of Gsdma3 involved in skin keratinocyte apoptosis, using immunofluorescence, RT-PCR, western blot and TUNEL analysis, we showed here that accompanying TNF-α-induced apoptosis and Caspase-3 expression in mouse skin keratinocytes in vivo and in vitro, Gsdma3 expression was significantly upregulated. After Gsdma3 gene mutation, TNF-α-induced apoptosis and Caspase-3 expression in skin keratinocytes were reduced. The injection of Gsdma3 expression plasmid could directly enhance the apoptosis and Caspase-3 expression in skin keratinocytes. These results, taken together, indicated that in mouse skin keratinocytes, Gsdma3 expression could be regulated b...Continue Reading
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