Related Experiment Video

Updated: Jul 16, 2026

Identifying the Effects of BRCA1 Mutations on Homologous Recombination using Cells that Express Endogenous Wild-type BRCA1
08:53

Identifying the Effects of BRCA1 Mutations on Homologous Recombination using Cells that Express Endogenous Wild-type BRCA1

Published on: February 17, 2011

BRCA1: mechanisms of inactivation and implications for management of patients

Richard D Kennedy1, Jennifer E Quinn, Patrick G Johnston

  • 1Department of Oncology, Cancer Research Centre, Queen's University Belfast, BT9 7AB, Northern Ireland, Belfast, Ireland.

Lancet (London, England)
|October 18, 2002
PubMed

Insights

Understanding BRCA1 gene mutations is crucial for early breast and ovarian cancer detection. This review explores how BRCA1 inactivation impacts cancer prevention, prognosis, and treatment response.

Area of Science:

  • Genetics
  • Oncology
  • Molecular Biology

Background:

  • The BRCA1 gene, identified in 1994, is linked to hereditary breast and ovarian cancer.
  • Genetic testing identifies individuals at high risk for these cancers.
  • The precise mechanisms by which BRCA1 inactivation leads to malignancy are not fully understood.

Purpose of the Study:

  • To examine mechanisms of BRCA1 inactivation.
  • To assess the impact of these mechanisms on patient management, including cancer prevention strategies.
  • To evaluate BRCA1's utility as a prognostic and predictive marker.

Main Methods:

  • Literature review of BRCA1 gene function and inactivation.
  • Analysis of cellular pathways affected by BRCA1.
  • Correlation of functional consequences with clinical observations in mutation carriers.

Main Results:

  • BRCA1 is involved in critical cellular pathways like DNA repair and transcription regulation.
  • Inactivation mechanisms and their clinical implications are explored.
  • Potential of BRCA1 as a prognostic and predictive biomarker is discussed.

Conclusions:

  • BRCA1 inactivation has significant implications for cancer development and patient outcomes.
  • Understanding these mechanisms can refine cancer prevention and treatment strategies.
  • BRCA1 holds promise as a tool for predicting prognosis and therapeutic response.

More Related Videos

gDNA Enrichment by a Transposase-based Technology for NGS Analysis of the Whole Sequence of BRCA1, BRCA2, and 9 Genes Involved in DNA Damage Repair08:15

gDNA Enrichment by a Transposase-based Technology for NGS Analysis of the Whole Sequence of BRCA1, BRCA2, and 9 Genes Involved in DNA Damage Repair

Published on: October 6, 2014

Silencing of BRCA2 to Identify Novel BRCA2-regulated Biological Functions in Cultured Human Cells09:24

Silencing of BRCA2 to Identify Novel BRCA2-regulated Biological Functions in Cultured Human Cells

Published on: August 12, 2015

Related Concept Videos

Cancer-Critical Genes I: Proto-oncogenes01:33

Cancer-Critical Genes I: Proto-oncogenes

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...
Loss of Tumor Suppressor Gene Functions01:12

Loss of Tumor Suppressor Gene Functions

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...
Cancer Prevention02:59

Cancer Prevention

Several factors can increase the risk of cancer in an individual. About 50% of cancer cases can be prevented by adopting a healthy lifestyle, regular exercise, eating healthy, and following a modest cancer prevention diet. Epidemiological studies have consistently shown that populations with vegetable and fruit-rich diets have reduced the incidence of cancer. On the other hand, populations who have a diet rich in animal fat, red meat, junk food, or high calories are predisposed to cancer.
Some...
Targeted Cancer Therapies02:57

Targeted Cancer Therapies

The targeted cancer therapies, also known as “molecular targeted therapies,” take advantage of the molecular and genetic differences between the cancer cells and the normal cells. It needs a thorough understanding of the cancer cells to develop drugs that can target specific molecular aspects that drive the growth, progression, and spread of cancer cells without affecting the growth and survival of other normal cells in the body.
There are several types of targeted therapies against specific...
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,...
Pharmacogenetics of Drug Targets: β₂-Adrenergic Receptors, Apo E, Thymidylate Synthase01:11

Pharmacogenetics of Drug Targets: β₂-Adrenergic Receptors, Apo E, Thymidylate Synthase

Genetic polymorphisms in drug targets have emerged as critical determinants of interindividual variability in drug response and toxicity. Pharmacogenomic investigations increasingly focus on identifying these variations to personalize and optimize therapeutic interventions. A drug target may be a receptor, enzyme, or signaling protein involved in pharmacologic responses or disease-related pathways. While early pharmacogenetic studies focused primarily on drug metabolism, current research...