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Mutagenicity and carcinogenicity of 8-MOP/UVA in cell cultures
Bulletin Du Cancer
|January 1, 1978
Abstract:
HGPRT-deficient mutants of chinese hamster cells and human skin fibroblasts are selected with 6-thioguanine after treatment with the combination 8-MOP and UVA. Calculation based on this study indicate that 1.7 X 10(-5) mutants will be induced in the epidermis per session of PUVA therapy. Induction of cell-transformation was observed in C3H and 3T3 mouse cells.
Insights
This study found that PUVA therapy, using 8-MOP and UVA, can induce mutations in skin cells. Calculations suggest a specific rate of mutant induction in the epidermis per therapy session.
Area of Science:
- Biochemistry
- Dermatology
- Genetics
Background:
- Psoralen plus ultraviolet A (PUVA) therapy is a common dermatological treatment.
- The mutagenic potential of PUVA therapy requires careful evaluation.
Purpose of the Study:
- To assess the mutagenic effects of 8-MOP and UVA combination therapy.
- To quantify the induction of HGPRT-deficient mutants in mammalian cells.
Main Methods:
- Selection of 8-azaguanine-resistant mutants in Chinese hamster cells and human skin fibroblasts.
- Treatment with 8-methoxypsoralen (8-MOP) and ultraviolet A (UVA) radiation.
- Induction of cell transformation in mouse cell lines (C3H and 3T3).
Main Results:
- HGPRT-deficient mutants were successfully selected after PUVA treatment.
- Calculations indicated a mutation induction rate of 1.7 x 10^-5 per epidermal cell per PUVA session.
- Cell-transformation was observed in mouse cell lines.
Conclusions:
- PUVA therapy demonstrates mutagenic potential in mammalian cells.
- The quantified mutation rate provides a basis for risk assessment in patients undergoing PUVA therapy.
- Further research into the mechanisms of PUVA-induced mutagenesis and cell transformation is warranted.