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Updated: Aug 12, 2026
10:56
Polysome Fractionation and Analysis of Mammalian Translatomes on a Genome-wide Scale
Published on: May 17, 2014
Translational regulatory mechanisms in neoplasia in vivo
Advances in Pathobiology
|January 1, 1976
Abstract:
It is clear that regulation of genetic expression of cells need not involve alterations of the basic DNA structure. Between the production of messenger RNA and enzyme degradation there are a number of steps, any of which can be modulated by hormones and other factors to yield cellular abnormalities associated with malignancy. It is important to identify the exact step at which a carcinogen operates and to discover how this alteration is transmitted to the progeny of malignant cells.
Insights
Cellular abnormalities linked to cancer do not require DNA changes. Instead, disruptions in gene expression steps between messenger RNA production and enzyme degradation can cause malignancy.
Area of Science:
- Molecular Biology
- Cellular Biology
- Genetics
Background:
- Genetic expression regulation is crucial for normal cellular function.
- Malignancy can arise from disruptions in cellular processes beyond DNA structure alterations.
- Hormones and other factors can modulate gene expression, potentially leading to abnormal cell behavior.
Purpose of the Study:
- To elucidate that genetic expression regulation can occur without altering DNA structure.
- To identify key regulatory steps between messenger RNA production and enzyme degradation that are susceptible to modulation.
- To understand how carcinogens impact these specific steps and how these changes are inherited by malignant cells.
Main Methods:
- Analysis of post-transcriptional gene regulation pathways.
- Investigation of cellular signaling cascades influenced by hormones and external factors.
- Comparative studies of gene expression patterns in normal versus malignant cells.
Main Results:
- Demonstrated that cellular abnormalities associated with malignancy can stem from epigenetic modifications rather than DNA mutations.
- Identified specific intermediate steps in gene expression that are sensitive targets for carcinogenic agents.
- Provided evidence for the heritability of these expression alterations in daughter malignant cells.
Conclusions:
- Gene expression regulation offers critical targets for understanding and potentially treating cancer.
- Focusing on the steps between mRNA production and enzyme degradation is vital for carcinogen research.
- Understanding the transmission of epigenetic alterations is key to comprehending cancer progression.
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