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Silibinin treatment ( 50 mg / kg / day for 4 days ) reversed dermal and epidermal autophagy levels from UVB irradiation - induced improper autophagy intervention , repaired the balance between cell survival and death in dermis and epidermis , and protected skin against damage through mediation of p53 activation in dermal and epidermal cells .
 Chemical: Silibinin
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: Silibinin