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Using the GEMM-ESC strategy to study gene function in mouse models.

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This summary is machine-generated.

The GEMM-ESC strategy rapidly generates genetically engineered mouse models (GEMMs) for preclinical research. This approach accelerates in vivo gene function analysis, improving therapeutic target validation.

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Area of Science:

  • * Molecular Biology
  • * Genetics
  • * Developmental Biology

Background:

  • * Preclinical validation of therapeutic targets necessitates suitable animal models, typically genetically engineered mouse models (GEMMs).
  • * Traditional methods for creating GEMMs are often time-consuming and complex.
  • * Efficient in vivo assessment of gene function is crucial for drug development.

Purpose of the Study:

  • * To present a modular, fast-track strategy for modifying existing GEMMs using embryonic stem cells (ESCs).
  • * To detail a protocol for re-deriving and manipulating GEMM-ESCs under feeder- and serum-free conditions.
  • * To enable rapid in vivo analysis of gene function in chimeric mice and their offspring.

Main Methods:

  • * Re-derivation of embryonic stem cells (ESCs) from existing GEMMs.
  • * Modification of GEMM-ESCs via recombinase-mediated transgene insertion and CRISPR/Cas9 genome editing.
  • * Production of chimeric mice using modified GEMM-ESCs for in vivo studies.

Main Results:

  • * The GEMM-ESC strategy significantly reduces the time required for generating transgenic mice with complex genotypes.
  • * Validated GEMM-ESC clones for transgene integration take 9-12 months.
  • * Recombinase-mediated transgene integration and chimeric cohort production takes 2-3 months.

Conclusions:

  • * The GEMM-ESC strategy offers a faster and more efficient alternative to traditional methods for creating GEMMs.
  • * This approach facilitates rapid in vivo validation of therapeutic gene targets.
  • * The protocol requires expertise in embryology, stem cell biology, and molecular biology, ideally within a transgenic facility.