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Loss of Tumor Suppressor Gene Functions01:12

Loss of Tumor Suppressor Gene Functions

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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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Loss of Tumor Suppressor Gene Functions01:12

Loss of Tumor Suppressor Gene Functions

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Cancer-Critical Genes II: Tumor Suppressor Genes01:05

Cancer-Critical Genes II: Tumor Suppressor Genes

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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...
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Cancer-Critical Genes II: Tumor Suppressor Genes01:05

Cancer-Critical Genes II: Tumor Suppressor Genes

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Abnormal Proliferation02:23

Abnormal Proliferation

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Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the...
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Cancer-Critical Genes I: Proto-oncogenes01:33

Cancer-Critical Genes I: Proto-oncogenes

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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.
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Related Experiment Video

Updated: Mar 17, 2026

Identification of Transcription Factor Regulators using Medium-Throughput Screening of Arrayed Libraries and a Dual-Luciferase-Based Reporter
11:32

Identification of Transcription Factor Regulators using Medium-Throughput Screening of Arrayed Libraries and a Dual-Luciferase-Based Reporter

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At the double for tumor suppressor.

Mahendra Sonawane1

  • 1Department of Biological Sciences, Tata Institute of Fundamental Research, Mumbai, India.

Elife
|July 16, 2016
PubMed
Summary

Research in zebrafish shows how a tumor suppressor functions differently in two cell types. Loss of this suppressor, combined with hypotonic stress, promotes tumor formation.

Area of Science:

  • Cell biology
  • Cancer research
  • Developmental biology

Background:

  • Tumor suppressors are critical for preventing uncontrolled cell growth.
  • Understanding cell-type-specific functions of tumor suppressors is key to cancer biology.
  • Hypotonic stress is an environmental factor that can impact cellular processes.

Purpose of the Study:

  • To investigate the dual role of a specific tumor suppressor in distinct cell types.
  • To elucidate the mechanism by which hypotonic stress influences tumor formation in the absence of tumor suppressor function.

Main Methods:

  • Zebrafish models were utilized to study tumor suppressor activity.
  • Comparative analysis of tumor suppressor function across different cell populations.
  • Induction of hypotonic stress to observe its effect on tumor development.
Keywords:
Na/K-ATPasecancer biologycarcinogenesisdevelopmental biologyepithelial polaritystem cellszebrafish

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Main Results:

  • The tumor suppressor exhibits differential activity depending on the cell type.
  • Loss of tumor suppressor function sensitizes cells to hypotonic stress.
  • Hypotonic stress exacerbates tumor formation when the tumor suppressor is compromised.

Conclusions:

  • The study highlights the context-dependent role of tumor suppressors in cancer prevention.
  • Hypotonic stress emerges as a significant factor promoting tumorigenesis under specific genetic conditions.
  • Findings in zebrafish offer insights into potential therapeutic strategies targeting tumor suppressor pathways.