Related Experiment Video

Updated: Aug 9, 2026

Analysis of Cell Cycle Position in Mammalian Cells
12:19

Analysis of Cell Cycle Position in Mammalian Cells

Published on: January 21, 2012

The retinoblastoma gene family and its role in proliferation, differentiation and development

A De Luca1, V Esposito, A Baldi

  • 1Department of Pathology, Thomas Jefferson University, Philadelphia, PA 19107, USA.

Histology and Histopathology
|October 1, 1996
PubMed

Insights

The retinoblastoma gene family, including the retinoblastoma gene (RB1), p107, and pRb2/p130, plays a key role in controlling cell growth and differentiation. This review clarifies their molecular mechanisms in cell cycle regulation.

Area of Science:

  • Molecular Biology
  • Cell Biology
  • Genetics

Background:

  • The retinoblastoma gene family comprises RB1, p107, and pRb2/p130, known for their roles in growth control.
  • These proteins share structural and functional similarities, indicating cooperative functions.
  • Interactions with cell-cycle regulators and transcription factors have been identified.

Purpose of the Study:

  • To review the molecular mechanisms of retinoblastoma gene family members.
  • To elucidate how RB1, p107, and pRb2/p130 cooperate in cellular processes.
  • To clarify their roles in cell cycle progression and differentiation.

Main Methods:

  • Literature review of existing research on the retinoblastoma gene family.
  • Analysis of studies investigating protein interactions and functions.
  • Synthesis of data on cell cycle regulation and differentiation pathways.

Main Results:

  • RB1, p107, and pRb2/p130 are crucial regulators of cell proliferation.
  • These proteins interact with various cell-cycle regulators and transcription factors.
  • Evidence suggests parallel roles in promoting cellular differentiation.

Conclusions:

  • The retinoblastoma gene family members cooperate to control cell proliferation and differentiation.
  • Understanding these molecular mechanisms is vital for comprehending tumor suppression.
  • Further research is needed to fully elucidate the precise functions of these proteins.

More Related Videos

Inducible and Reversible Dominant-negative (DN) Protein Inhibition08:35

Inducible and Reversible Dominant-negative (DN) Protein Inhibition

Published on: January 7, 2019

Reconstruct Human Retinoblastoma In Vitro06:52

Reconstruct Human Retinoblastoma In Vitro

Published on: October 11, 2022

Related Concept Videos

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.
Abnormal Proliferation02:23

Abnormal Proliferation

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 daughter...
The Ras Gene02:38

The Ras Gene

The Ras-gene-encoded proteins are regulators of signaling pathways controlling cell proliferation, differentiation, or cell survival. The Ras-gene family in humans constitutes three primary members—the HRas, NRas, and KRas. These genes code for four functionally distinct yet closely related proteins—the HRas, NRas, KRas4A, and KRas4B. The involvement of mutant Ras genes in human cancer was first discovered in 1982 and is among the most common causes of human tumorigenesis.
Ras is a superfamily...
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...
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,...