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Cancer-Critical Genes II: Tumor Suppressor Genes

Cancer-Critical Genes II: Tumor Suppressor Genes

Genes usually encode proteins necessary for the proper functioning of a healthy cell. Mutations can often cause changes to the gene expression pattern, thereby altering the phenotype.
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...

Cancer-Critical Genes II: Tumor Suppressor Genes

Cancer-Critical Genes II: Tumor Suppressor Genes

Genes usually encode proteins necessary for the proper functioning of a healthy cell. Mutations can often cause changes to the gene expression pattern, thereby altering the phenotype.
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...

Cancer

Cancer

Cancers arise due to mutations in genes involved in the regulation of cell division, which leads to unrestricted cell proliferation. Modern science and medicine have made great strides in the understanding and treatment of cancer, including eradicating cancer in some patients. However, there is still no cure for cancer. This is largely due to the fact that cancer is a large group of many diseases.

Adaptive Mechanisms in Cancer Cells

Adaptive Mechanisms in Cancer Cells

Cancer cells accumulate genetic changes at an abnormally rapid rate due to the defects in the DNA repair mechanisms. From an evolutionary perspective, such genetic instability is advantageous for cancer development. Mutant cell lines accumulate a series of beneficial mutations that contribute to their progression into cancer.
Some of the advantages that cancer cells have on normal cells include - enhanced ability to divide without terminally differentiating, induce new blood vessel formation,...

Adaptive Mechanisms in Cancer Cells

Adaptive Mechanisms in Cancer Cells

Cancer cells accumulate genetic changes at an abnormally rapid rate due to the defects in the DNA repair mechanisms. From an evolutionary perspective, such genetic instability is advantageous for cancer development. Mutant cell lines accumulate a series of beneficial mutations that contribute to their progression into cancer.
Some of the advantages that cancer cells have on normal cells include - enhanced ability to divide without terminally differentiating, induce new blood vessel formation,...

Loss of Tumor Suppressor Gene Functions

Loss of Tumor Suppressor Gene Functions

Tumor suppressor genes are normal genes that can slow down cell division, repair DNA mistakes, or program the cells for apoptosis in case of irreparable damage. Hence, they play an essential role in preventing the proliferation of damaged cells.
When the tumor suppressor genes develop mutations or are lost, cells start growing out of control, leading to cancer. However, a single functional copy of the tumor suppressor gene is enough for the cells to maintain their normal functions and cell...

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Related Experiment Video

Updated: Jun 13, 2026

Generating the Transcriptional Regulation View of Transcriptomic Features for Prediction Task and Dark Biomarker Detection on Small Datasets

Generating the Transcriptional Regulation View of Transcriptomic Features for Prediction Task and Dark Biomarker Detection on Small Datasets

Published on: March 1, 2024

Cancer reduces transcriptome specialization.

Octavio Martínez¹, M Humberto Reyes-Valdés, Luis Herrera-Estrella

¹Laboratorio Nacional de Genómica para la Biodiversidad, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Irapuato, Guanajuato, México. omartine@ira.cinvestav.mx

|May 11, 2010

Summary

Cancer significantly reduces transcriptome specialization, making tumor cells functionally similar to dedifferentiated embryonic stem cells. This loss of gene expression specificity impacts normal tissue functions and cancer progression.

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Dissociation of Human and Mouse Tumor Tissue Samples for Single-cell RNA Sequencing

Dissociation of Human and Mouse Tumor Tissue Samples for Single-cell RNA Sequencing

Published on: August 16, 2024

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Last Updated: Jun 13, 2026

Generating the Transcriptional Regulation View of Transcriptomic Features for Prediction Task and Dark Biomarker Detection on Small Datasets

Generating the Transcriptional Regulation View of Transcriptomic Features for Prediction Task and Dark Biomarker Detection on Small Datasets

Published on: March 1, 2024

Dissociation of Human and Mouse Tumor Tissue Samples for Single-cell RNA Sequencing

Dissociation of Human and Mouse Tumor Tissue Samples for Single-cell RNA Sequencing

Published on: August 16, 2024

Area of Science:

Cancer Biology
Genomics
Bioinformatics

Background:

Cancer involves cell cycle deregulation and loss of normal tissue function.
Tumor cells exhibit altered morphology and physiology compared to normal cells.
A hypothesis suggests reduced transcriptome specialization in cancerous tissues.

Purpose of the Study:

To quantitatively test if cancer reduces transcriptome specialization.
To compare transcriptome specialization in normal versus tumor tissues.
To understand the role of gene expression specificity in cancer.

Main Methods:

Analysis of four transcriptome datasets from normal and tumor tissues.
Application of information theory tools to measure transcriptome specialization.
Quantitative assessment of gene expression patterns.

Main Results:

Transcriptional specialization in tumors is significantly lower than in normal tissues.
Tumor transcriptome specialization is comparable to dedifferentiated embryonic stem cells.
Reduced specialization is primarily due to decreased expression of organ-specific genes.

Conclusions:

Cancer leads to a significant loss of transcriptome specialization.
This loss of specialization contributes to impaired normal tissue function.
The findings provide insights into carcinogenesis and identify potential targets for cancer therapy.