Neoplastic transformation of C3H mouse embryo 10T1/2 cells by 8-methoxypsoralen plus UVA radiation
The effect of 8-methoxypsoralen plus UVA radiation (PUVA) on cell killing and induction of transformation was studied in the C3H mouse embryo 10T1/2 cell line. Dose-response data for both survival and transformation were obtained as a function of 8-methoxypsoralen (8-MOP) concentration and UVA dose. PUVA treatment caused cell death and induced transformation in a dose-dependent manner. Treatment of cells with 8-MOP alone (10 micrograms/ml) or UVA alone (90 J/m2) had no effect on either cell killing or transformation. The product of 8-MOP concentration and UVA dose calculated at 10% survival and 10(-3) transformation frequency levels were quite similar regardless of 8-MOP concentration or UVA dose. This suggests that there exists a simple reciprocal relationship between 8-MOP concentration and UVA dose. Both type II and type III foci induced by PUVA treatment were tumorigenic in vivo. These data provide further evidence for the carcinogenicity of PUVA treatment. In addition, the system described here could serve as a valuable model for studying the relationships between transformation and the specific cellular and molecular lesions induced by PUVA treatment.
- Research Organization:
- Univ. of Texas M.D. Anderson Hospital and Tumor Institute, Houston
- OSTI ID:
- 5018870
- Journal Information:
- J. Invest. Dermatol.; (United States), Vol. 2
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
EMBRYONIC CELLS
BIOLOGICAL RADIATION EFFECTS
PSORALEN
TOXICITY
BIOLOGICAL MODELS
CELL KILLING
DOSE-RESPONSE RELATIONSHIPS
MICE
RADIATION DOSES
SURVIVAL TIME
SYNERGISM
ULTRAVIOLET RADIATION
ANIMAL CELLS
ANIMALS
ANTICOAGULANTS
BIOLOGICAL EFFECTS
COUMARINS
DOSES
DRUGS
ELECTROMAGNETIC RADIATION
HEMATOLOGIC AGENTS
HETEROCYCLIC COMPOUNDS
MAMMALS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
RADIATION EFFECTS
RADIATIONS
RODENTS
VERTEBRATES
560301* - Chemicals Metabolism & Toxicology- Cells- (-1987)
560121 - Radiation Effects on Cells- External Source- (-1987)