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Related Concept Videos

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Genetic screens are tools used to identify genes and mutations responsible for phenotypes of interest. Genetic screens help identify individuals or a group of people at risk of developing  genetic diseases and help them with early intervention, targeted therapy, and reproductive options.
Forward genetic screens
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To learn more about the function of a gene, researchers can observe what happens when the gene is inactivated or “knocked out,” by creating genetically engineered knockout animals. Knockout mice have been particularly useful as models for human diseases such as cancer, Parkinson’s disease, and diabetes.
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Genetic Modifier Screens in Mice.

Marina R Carpinelli1,2,3,4, Rachel A Burt1,2,3,4, Benjamin T Kile5,2

  • 1Molecular Medicine Division, The Walter and Eliza Hall Institute of Medical Research, Parkville, Australia.

Current Protocols in Mouse Biology
|June 13, 2015
PubMed
Summary
This summary is machine-generated.

Ethylnitrosourea (ENU) mutagenesis enables gene discovery through phenotypic screening. Modifier screens in mice identify mutations that alter existing phenotypes, uncovering new genetic interactions and drug targets.

Keywords:
ENU mutagenesisfunctional geneticsmodifier screen

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Area of Science:

  • Genetics
  • Molecular Biology
  • Pharmacology

Background:

  • Forward genetics strategies like ENU mutagenesis identify genes by observing phenotypes after induced mutations.
  • Modifier screens utilize pre-existing phenotypes in mice to discover genes that enhance or suppress these traits.

Purpose of the Study:

  • To review considerations for planning ENU-based suppressor screens in mice.
  • To provide practical advice for implementing modifier screens to identify novel genetic interactions and drug targets.

Main Methods:

  • Discussion of key factors in suppressor screen design, including phenotype characteristics, genetic background, and mutation identification.
  • Review of practical aspects such as screening assays and required mouse numbers.

Main Results:

  • Identification of critical parameters influencing the success of ENU suppressor screens.
  • Guidance on optimizing the strategy for uncovering genetic pathways and potential therapeutic targets.

Conclusions:

  • Modifier screens using ENU mutagenesis are powerful for dissecting genetic pathways and identifying new drug targets.
  • Careful planning and consideration of numerous factors are essential for effective suppressor screen implementation.