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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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[Construction of β2m knockout mice].

Zhen Li1, Ruilin Sun2, Wen Liu1

  • 1Department of Cell and Genetic Medicine, School of Basic Medical Sciences, Fudan University, Shanghai 200300, China.

Sheng Wu Gong Cheng Xue Bao = Chinese Journal of Biotechnology
|September 2, 2021
PubMed
Summary
This summary is machine-generated.

We successfully created Beta-2-microglobin (β2m) knockout mice using CRISPR/Cas9 technology. These mice exhibit reduced β2m expression and fewer CD8+ killer T cells, aiding tumor and disease research.

Keywords:
CRISPR/Cas9knockout micemajor histocompatibility complexβ2m

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Area of Science:

  • Immunology
  • Genetics
  • Molecular Biology

Background:

  • Beta-2-microglobin (β2m) is crucial for Major Histocompatibility Complex class I (MHC I) molecule function in antigen presentation.
  • Tumors and pathogens can evade immune detection by downregulating MHC I expression.
  • Development of precise animal models is vital for studying diseases and therapeutic strategies.

Purpose of the Study:

  • To generate and validate a β2m knockout mouse model.
  • To investigate the role of β2m in immune responses.
  • To provide a tool for in vivo research on β2m function and related diseases.

Main Methods:

  • CRISPR/Cas9 gene editing was employed for β2m knockout mouse generation via embryo microinjection.
  • Genotyping was confirmed using Polymerase Chain Reaction (PCR).
  • Quantitative PCR (qPCR) and flow cytometry were used for phenotyping and assessing gene/protein expression and immune cell populations.

Main Results:

  • Successful deletion of the β2m coding region in knockout mice.
  • Significant downregulation of β2m mRNA levels was observed.
  • A marked reduction in CD8+ killer T cell populations was detected in various tissues.

Conclusions:

  • A novel strain of β2m knockout mice has been successfully established.
  • This model demonstrates impaired MHC I antigen presentation due to β2m deficiency.
  • The generated mouse model is a valuable resource for future in vivo studies on β2m's role in immunity, cancer, and disease.