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Adult gerbil epidermal cells resistant to terminal differentiation associated with initiation of carcinogenesis
1Department of Pathology, Fluminense Federal University, Niteroi, RJ, Brasil.
Abstract:
In order to identify the cellular basis of the gerbil skin unresponsiveness to two-stage carcinogenesis, it was studied the effect of an initiating dose of carcinogen on the biological behaviour of gerbil skin. Treatment of adult gerbil epidermal cells either in vivo or in vitro with 3-methylcholanthrene yielded cells which were resistant to terminal differentiation induced by calcium. These results support the concept derived from the mouse model system of skin carcinogenesis in which initiation is associated with an altered program of epidermal differentiation. The results also suggest that relative resistance of gerbil skin to two-stage carcinogenesis is related to promotion stage.
Insights
Gerbil skin cells, when exposed to a carcinogen, become resistant to differentiation. This resistance suggests gerbil skin
Area of Science:
- Dermatology
- Carcinogenesis
- Cell Biology
Background:
- Gerbil skin exhibits unresponsiveness to two-stage carcinogenesis.
- Understanding the cellular mechanisms underlying this resistance is crucial for cancer research.
Purpose of the Study:
- To investigate the cellular basis of gerbil skin's resistance to chemical carcinogenesis.
- To determine the effect of a carcinogen initiator on gerbil epidermal cell behavior.
Main Methods:
- Adult gerbil epidermal cells were treated with 3-methylcholanthrene (a carcinogen) both in vivo and in vitro.
- The differentiation response of treated cells to calcium induction was assessed.
Main Results:
- Carcinogen treatment resulted in gerbil epidermal cells that were resistant to calcium-induced terminal differentiation.
- This finding aligns with models of skin carcinogenesis in mice, where initiation alters epidermal differentiation programs.
Conclusions:
- Initiation of carcinogenesis in gerbils involves altered epidermal differentiation.
- Gerbil skin's resistance to two-stage carcinogenesis is likely linked to the promotion stage of the process.