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Related Concept Videos

Mouse Models of Cancer Study02:43

Mouse Models of Cancer Study

Mice have long served as models for studying human biology and pathology because of their phylogenetic and physiological similarity with humans. They are also easy to maintain and breed in the laboratory, and hence, many inbred strains are now available for research. Studies on mice have contributed immeasurably to our understanding of cancer biology.
The development of transgenic, knockout, and knock-in mice has led to an exponential increase in their use as model organisms in research,...

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Related Experiment Video

Updated: Jun 28, 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 18, 2011

Characterization of Brca1 deficient mice.

J N Snouwaert1, L C Gowen, V Lee

  • 1Department of Medicine, University of North Carolina at Chapel Hill Chapel Hill, NC 27599-7248, USA.

Breast Disease
|February 3, 2005
PubMed
Summary

Mutations in the BRCA1 gene increase cancer risk in women. While Brca1 mutations in mice don't cause breast tumors, they are essential for embryonic development, leading to lethality in homozygous mutants.

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Time-lapse Imaging of Primary Preneoplastic Mammary Epithelial Cells Derived from Genetically Engineered Mouse Models of Breast Cancer
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Published on: February 8, 2013

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

Published on: August 12, 2015

Related Experiment Videos

Last Updated: Jun 28, 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 18, 2011

Time-lapse Imaging of Primary Preneoplastic Mammary Epithelial Cells Derived from Genetically Engineered Mouse Models of Breast Cancer
11:47

Time-lapse Imaging of Primary Preneoplastic Mammary Epithelial Cells Derived from Genetically Engineered Mouse Models of Breast Cancer

Published on: February 8, 2013

Silencing of BRCA2 to Identify Novel BRCA2-regulated Biological Functions in Cultured Human Cells
09:24

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

Published on: August 12, 2015

Area of Science:

  • Genetics
  • Molecular Biology
  • Oncology

Background:

  • BRCA1 is a tumor suppressor gene linked to hereditary breast and ovarian cancers.
  • Tumors in BRCA1 mutation carriers typically lack wild-type BRCA1 expression.
  • Understanding BRCA1's role in development and tumorigenesis is crucial.

Purpose of the Study:

  • To investigate the role of the BRCA1 gene in normal development and tumor formation using a murine model.
  • To analyze the consequences of Brca1 gene mutations in mice.

Main Methods:

  • Utilized in vitro manipulation of mouse embryonic stem (ES) cells.
  • Generated mouse lines with specific Brca1 gene mutations.
  • Observed embryonic lethality in homozygous Brca1 mutant mice.

Main Results:

  • Brca1 homozygous mutations result in postimplantation embryonic lethality.
  • Brca1 heterozygous mice do not exhibit increased breast tumor risk, unlike humans.
  • Embryonic survival is prolonged in Brca1 deficient embryos lacking p53 and p21.

Conclusions:

  • BRCA1 is essential for embryonic development in mice.
  • The Brca1 gene plays a critical role in preventing embryonic lethality.
  • Mouse models reveal distinct roles for BRCA1 in development versus cancer predisposition.