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Expression of c-mos proto-oncogene in undifferentiated teratocarcinoma cells
Abstract:
Proto-oncogene c-mos, the cellular homologue of the transforming gene of Moloney murine sarcoma virus, has been characterized by the lack of expression in a variety of differentiated tissues, possibly because of the existence of an inhibitory upstream sequence. We detected mos-related transcripts in undifferentiated embryonal carcinoma cells of pluripotential cell line 311. The sizes of three major transcripts detected were estimated to be 1.8, 4.6 and 6.1-kilobases (kb) by northern analysis. Furthermore, these transcriptions were suppressed when the cell differentiation was induced by retinoic acid. Taken together, the results suggest that mos product plays a role in early stages of development.
Insights
Proto-oncogene c-mos expression is detected in undifferentiated embryonal carcinoma cells. This mos expression is suppressed upon induction of cell differentiation, suggesting a role in early development.
Area of Science:
- Molecular Biology
- Developmental Biology
- Oncology
Background:
- Proto-oncogene c-mos is the cellular homologue of the Moloney murine sarcoma virus transforming gene.
- c-mos expression is typically absent in differentiated tissues, potentially due to upstream inhibitory sequences.
Purpose of the Study:
- To investigate the presence and regulation of mos-related transcripts in undifferentiated embryonal carcinoma cells.
- To explore the role of the mos product in early developmental stages.
Main Methods:
- Northern blot analysis was used to detect and size mos-related transcripts.
- Retinoic acid was employed to induce cell differentiation.
Main Results:
- Mos-related transcripts, measuring 1.8, 4.6, and 6.1 kilobases (kb), were identified in undifferentiated embryonal carcinoma cells (cell line 311).
- These transcripts were significantly suppressed following retinoic acid-induced differentiation.
Conclusions:
- The findings indicate that mos expression is characteristic of undifferentiated states.
- The suppression of mos transcripts during differentiation suggests its involvement in early embryonic development.