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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,...
Diabetic Retinopathy01:27

Diabetic Retinopathy

DefinitionDiabetic retinopathy is a microvascular complication of diabetes affecting the retinal blood vessels.Risk FactorsDiabetic retinopathy is present in almost all individuals with type 1 diabetes and more than 60% of those with type 2 diabetes after two decades of disease.The risk increases with poor glycemic control, hypertension, dyslipidemia, smoking, pregnancy, and puberty.Although cataracts and glaucoma are also more frequent in people with diabetes, retinopathy remains the leading...
The Retina01:32

The Retina

The retina is a layer of nervous tissue at the back of the eye that transduces light into neural signals. This process, called phototransduction, is carried out by rod and cone photoreceptor cells in the back of the retina.

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Related Experiment Video

Updated: Jun 10, 2026

Reconstruct Human Retinoblastoma In Vitro
06:52

Reconstruct Human Retinoblastoma In Vitro

Published on: October 11, 2022

Retinoblastoma.

Dietmar Lohmann1

  • 1Institut fur Humangenetik, Universitatsklinikum Essen, Hufelandstrasse 55, D-45122 Essen, Germany. dietmar.lohmann@uni-due.de

Advances in Experimental Medicine and Biology
|August 7, 2010
PubMed
Summary

Retinoblastoma, a rare eye cancer in young children, arises from RB1 gene mutations. Understanding hereditary retinoblastoma and its genetic factors can improve prognosis and reduce cancer risk.

Area of Science:

  • Oncology
  • Genetics
  • Ophthalmology

Background:

  • Retinoblastoma (Rb) is a malignant tumor of the developing retina, primarily affecting children under five.
  • Rb development requires mutations in both alleles of the RB1 gene.
  • Hereditary Rb, often bilateral, involves inherited RB1 mutations causing predisposition and increased risk of secondary cancers, especially after radiotherapy.

Purpose of the Study:

  • To explore the genetic basis of retinoblastoma, including hereditary and nonhereditary forms.
  • To investigate genotype-phenotype correlations in RB1 mutation carriers.
  • To identify genetic factors influencing tumor development and risk of second cancers.

Main Methods:

  • Analysis of RB1 gene mutations in sporadic and familial retinoblastoma cases.

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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 10, 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

  • Genotype-phenotype association studies to correlate RB1 mutations with tumor characteristics.
  • Examination of genetic modification of hereditary retinoblastoma phenotypes.

    • Main Results:

    • Nonhereditary Rb results from somatic RB1 mutations, while hereditary Rb involves heterozygous germline mutations.
    • The number of tumor foci in RB1 mutation carriers varies based on retained functions of the normal allele.
    • Phenotypic expression of hereditary retinoblastoma is influenced by genetic modifiers.

    Conclusions:

    • Understanding RB1 gene mutations is crucial for retinoblastoma diagnosis and prognosis.
    • Identifying genetic factors can lead to more precise risk assessment for hereditary retinoblastoma and secondary cancers.
    • Further research into genetic modifiers may reveal strategies to mitigate tumor development risk.