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Related Concept Videos

The Retinoblastoma Gene01:20

The Retinoblastoma Gene

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.
The first-ever tumor suppressor gene called Rb was identified in retinoblastoma - a rare eye tumor in children. In inherited forms of the disease, a child inherits one defective copy of the Rb gene, which predisposes them to retinoblastoma. However,...
The Retinoblastoma Gene01:20

The Retinoblastoma Gene

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.
The first-ever tumor suppressor gene called Rb was identified in retinoblastoma - a rare eye tumor in children. In inherited forms of the disease, a child inherits one defective copy of the Rb gene, which predisposes them to retinoblastoma. However,...
Negative Regulator Molecules01:23

Negative Regulator Molecules

Positive regulators allow a cell to advance through cell cycle checkpoints. Negative regulators have an equally important role as they terminate a cell’s progression through the cell cycle—or pause it—until the cell meets specific criteria.
mTOR Signaling and Cancer Progression03:03

mTOR Signaling and Cancer Progression

The mammalian target of rapamycin or mTOR protein was discovered in 1994 due to its direct interaction with rapamycin. The protein gets its name from a yeast homolog called TOR. The mTOR protein complex in mammalian cells plays a major role in balancing anabolic processes such as the synthesis of proteins, lipids, and nucleotides and catabolic processes, such as autophagy in response to environmental cues, such as availability of nutrients and growth factors.
The mTOR pathway or the...

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Related Experiment Video

Updated: Jun 22, 2026

Reconstruct Human Retinoblastoma In Vitro
06:52

Reconstruct Human Retinoblastoma In Vitro

Published on: October 11, 2022

Retinoblastoma protein: a central processing unit.

M Poznic1

  • 1Division of Molecular Medicine, Rudjer Boskovic Institute, Bijenicka cesta 54, Zagreb, Croatia. miroslav.poznic@irb.hr

Journal of Biosciences
|June 25, 2009
PubMed
Summary

The retinoblastoma protein (pRb) regulates the cell cycle and gene transcription. New findings show pRb also controls apoptosis, differentiation, and development via E2F transcription factors.

Area of Science:

  • Molecular Biology
  • Cell Biology
  • Cancer Research

Background:

  • The retinoblastoma protein (pRb) is a critical regulator of the cell cycle.
  • pRb inactivation is linked to cancer development.
  • pRb controls the G1-to-S phase transition by interacting with E2F transcription factors.

Purpose of the Study:

  • To investigate the multifaceted roles of pRb beyond cell-cycle control.
  • To explore pRb's involvement in apoptosis, differentiation, and development.
  • To understand the regulatory mechanisms of pRb-E2F complexes.

Main Methods:

  • Analysis of pRb-E2F interactions.
  • Gene expression profiling related to cell cycle, apoptosis, and differentiation.
  • Cellular assays to assess cell-cycle progression and apoptosis.

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Establishment and Propagation of Human Retinoblastoma Tumors in Immune Deficient Mice
07:55

Establishment and Propagation of Human Retinoblastoma Tumors in Immune Deficient Mice

Published on: August 4, 2011

Related Experiment Videos

Last Updated: Jun 22, 2026

Reconstruct Human Retinoblastoma In Vitro
06:52

Reconstruct Human Retinoblastoma In Vitro

Published on: October 11, 2022

Establishment and Propagation of Human Retinoblastoma Tumors in Immune Deficient Mice
07:55

Establishment and Propagation of Human Retinoblastoma Tumors in Immune Deficient Mice

Published on: August 4, 2011

Main Results:

  • pRb regulates apoptosis through its interaction with E2F transcription factors.
  • Rb-E2F complexes are involved in the transcriptional regulation of differentiation and development genes.
  • pRb's function extends to pathways controlling cell fate.

Conclusions:

  • pRb plays a broader role in cellular regulation than previously understood.
  • pRb-E2F interactions are key to controlling cell-cycle progression, apoptosis, and developmental processes.
  • Further research into pRb's functions may reveal new therapeutic targets for cancer.