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A chemically transformed rat fibroblast cell line expresses high levels of oncomodulin
E W Sommer1, J K Blum, M C Berger
1Institute of Toxicology, ETH-Zürich, Schwerzenbach, Switzerland.
Abstract:
Chemically (by N-methyl-N'-nitro-N-nitrosoguanidine) treated rat fibroblasts (T14c) exhibited growth characteristics and a morphology typical for transformed cells and markedly different from untreated, parental cells. In contrast to untransformed cells, T14c fibroblasts produced significant levels of oncomodulin mRNA as analyzed on Northern blots even when compared to rat Morris hepatomas, the richest source of oncomodulin known so far. The levels of transcripts for both calmodulin and oncomodulin in T14c cells were higher in log phase growth as compared to confluent stages. The T14c model system may be useful in the elucidation of mechanisms involved in the regulation of oncomodulin synthesis.
Insights
Chemically treated rat fibroblasts (T14c) showed transformed cell characteristics and produced high levels of oncomodulin mRNA. This finding suggests the T14c model is valuable for studying oncomodulin synthesis regulation in cancer research.
Area of Science:
- Cell Biology
- Molecular Biology
- Cancer Research
Background:
- Chemically induced transformation of cells is a key area in cancer research.
- Oncomodulin is a protein implicated in cellular growth and differentiation, with high levels found in certain tumors.
- Understanding the regulation of oncomodulin is crucial for developing targeted cancer therapies.
Purpose of the Study:
- To investigate the characteristics of chemically treated rat fibroblasts (T14c).
- To analyze the expression levels of oncomodulin mRNA in T14c cells.
- To evaluate the potential of the T14c model system for studying oncomodulin synthesis.
Main Methods:
- Chemical treatment of rat fibroblasts with N-methyl-N'-nitro-N-nitrosoguanidine.
- Morphological and growth characteristic analysis of treated (T14c) versus untreated cells.
- Northern blot analysis to quantify oncomodulin and calmodulin mRNA levels.
Main Results:
- T14c fibroblasts displayed transformed cell morphology and growth patterns.
- T14c cells exhibited significant oncomodulin mRNA production, comparable to Morris hepatomas.
- Oncomodulin and calmodulin transcript levels were higher during log phase growth than in confluent stages.
Conclusions:
- The T14c rat fibroblast model effectively mimics transformed cells.
- This model demonstrates substantial oncomodulin mRNA expression, offering a new system for research.
- The T14c system provides a valuable tool for elucidating oncomodulin synthesis regulation mechanisms.