Coal tar, a tumour initiator, and dithranol, a tumour promoter, are used in the treatment of psoriasis. Topical treatment of mice with pharmaceutical formulations of these two agents, at therapeutic doses, induced skin papillomas in a classical two-stage carcinogenesis protocol, while treatment with either agent alone did not. This finding has implications for the use of both agents in combination in the treatment of psoriasis.
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1969454 | PMC |
http://dx.doi.org/10.1038/bjc.1994.205 | DOI Listing |
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