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Initiation-promotion skin carcinogenesis and immunological competence
Summary
This study investigated how carcinogens affect immune responses in mice during skin cancer development. It found that a cellular immunity stimulator, chlorphenesin, inhibited tumor growth when administered during the promotion phase.
Area of Science:
- Immunology
- Dermatology
- Carcinogenesis
Background:
- Skin carcinogenesis involves initiation and promotion stages.
- Immune competence plays a role in cancer development.
- Carcinogens can modulate immune responses.
Purpose of the Study:
- To determine the immune competence of mice during skin carcinogenesis.
- To investigate the effects of carcinogens and immune modulators on skin tumor development.
Main Methods:
- Assessed immune competence using skin allograft rejection and lymphocyte mitogenesis.
- Administered 7,12-dimethylbenzanthracene (carcinogen) and croton oil.
- Tested the effect of chlorphenesin, a cellular immunity stimulator, during the promotion phase.
Main Results:
- 7,12-dimethylbenzanthracene inhibited cellular immune competence.
- Lymphocytes from croton oil treated mice showed enhanced PWM response.
- Chlorphenesin inhibited skin tumorigenesis during the promotion stage.
Conclusions:
- Carcinogens can suppress immune function during skin carcinogenesis.
- Modulating cellular immunity with agents like chlorphenesin may inhibit tumor promotion.