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Related Concept Videos

The Retinoblastoma Gene01:20

The Retinoblastoma Gene

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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.
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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.
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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.
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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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As the name suggests, non-LTR retrotransposons lack the long terminal repeats characteristic of the LTR retrotransposons. Additionally, both LTR and non-LTR retrotransposons use distinct mechanisms of mobilization. Non-LTR retrotransposons are further divided into two classes - Long interspersed nuclear elements (LINEs) and short interspersed nuclear elements (SINEs), both of which occur abundantly in most mammals, including humans. Some of the active non-LTR retrotransposons in humans are L1...
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Related Experiment Video

Updated: Sep 1, 2025

Reconstruct Human Retinoblastoma In Vitro
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Novel insights into RB1 mutation.

Yiran Yao1, Xiang Gu1, Xiaofang Xu1

  • 1Department of Ophthalmology, Ninth People's Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, China; Shanghai Key Laboratory of Orbital Diseases and Ocular Oncology, Shanghai, China.

Cancer Letters
|August 14, 2022
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The retinoblastoma susceptibility gene (RB1) is a key tumor suppressor. RB1 mutations drive various cancers, and this review explores their oncogenic mechanisms and therapeutic potential.

Keywords:
MutationRB1RetinoblastomaTumorigenesis

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Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • The retinoblastoma susceptibility gene (RB1) is a well-established tumor suppressor gene.
  • RB1 mutations are implicated in numerous cancers, including retinoblastoma, prostate, lung, and breast cancer.
  • Despite extensive research, the full clinical utility of targeting RB1 mutations remains underexplored.

Purpose of the Study:

  • To review the mechanisms by which RB1 mutations contribute to oncogenesis.
  • To discuss potential therapeutic strategies for RB1-mutated cancers.
  • To highlight unresolved questions and future prospects in RB1 mutation research.

Main Methods:

  • Literature review of RB1 gene function, mutations, and associated pathways.
  • Analysis of oncogenic mechanisms driven by RB1 alterations.
  • Exploration of current and emerging therapeutic approaches targeting RB1-mutated tumors.

Main Results:

  • RB1 mutations are critical drivers in various malignancies.
  • Understanding RB1's role in cell cycle regulation and apoptosis is key to its function as a tumor suppressor.
  • Targeting RB1-mutated cancers presents promising therapeutic avenues.

Conclusions:

  • RB1 mutations are fundamental to cancer development, necessitating further investigation.
  • Exploiting RB1's tumor suppressor functions offers potential for novel cancer therapies.
  • Continued research is vital to address current challenges and unlock future prospects for RB1-targeted treatments.