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Genetically engineered cell lines for α1-antitrypsin expression.

Qianqian Ji1, Caiping Guo2, Chen Xie2

  • 1School of Life Sciences, Sun Yat-Sen University, Guangzhou, People's Republic of China.

Biotechnology Letters
|July 20, 2017
PubMed
Summary
This summary is machine-generated.

Genetically engineered HEK293T cells can now produce functional alpha-1 antitrypsin (AAT) using CRISPR/Cas9 technology. This breakthrough offers a promising new strategy for treating alpha-1 antitrypsin deficiency (AATD).

Keywords:
AAVS1 locusCRISPR/Cas9Homologous recombinationα1-Antitrypsin deficiency

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Area of Science:

  • Biotechnology
  • Genetic Engineering
  • Molecular Biology

Background:

  • Alpha-1 antitrypsin deficiency (AATD) is a genetic disorder causing lung and liver damage.
  • Current AAT augmentation therapies are limited by cost and supply.

Purpose of the Study:

  • To develop genetically modified cell lines capable of producing functional alpha-1 antitrypsin (AAT).
  • To utilize CRISPR/Cas9-assisted homologous recombination for therapeutic cell line generation.

Main Methods:

  • Integration of the human AAT gene (SERPINA1) into the AAVS1 locus of HEK293T cells.
  • CRISPR/Cas9 technology was employed to facilitate gene insertion and assess cell line efficacy.
  • Analysis of recombinant AAT secretion and functional activity in engineered cell clones.

Main Results:

  • Successfully generated human cell lines with the AAT gene integrated at the AAVS1 locus.
  • Engineered cells secreted approximately 0.04 g/l of recombinant AAT into the culture medium.
  • The secreted AAT demonstrated functional inhibitory activity comparable to plasma-derived AAT.

Conclusions:

  • CRISPR/Cas9-mediated engineering provides a viable method for creating isogenic cell lines with consistent AAT production.
  • This approach shows potential for generating therapeutic liver stem cells for AATD treatment.
  • This study advances the development of novel therapeutic strategies for AATD.