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Related Experiment Videos

High-efficiency expression gene cloning by flow cytometry

R Dell'Arciprete1, M Stella, M Fornaro

  • 1Istituto di Ricerche Farmacologiche, Consorzio Mario Negri Sud, Santa Maria Imbaro (Chieti), Italy.

The Journal of Histochemistry and Cytochemistry : Official Journal of the Histochemistry Society
|June 1, 1996
PubMed
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Researchers developed a novel gene cloning method using flow cytometry and optimized DNA transfection protocols. This efficient technique enables high-level expression and cloning of genes, including Trop-2 from human carcinomas.

Area of Science:

  • Molecular Biology
  • Cell Biology
  • Biotechnology

Background:

  • Gene cloning is essential for molecular biology research.
  • Flow cytometry offers potential for cell sorting and analysis.
  • Efficient DNA transfection and selection of rare cells remain challenging.

Purpose of the Study:

  • To develop a convenient and widely applicable gene cloning procedure utilizing flow cytometry.
  • To optimize DNA transfection and selection protocols for rare transfectants.
  • To demonstrate the utility of the method by cloning the Trop-2 gene.

Main Methods:

  • Investigated calcium phosphate co-precipitation for DNA transfection.
  • Optimized critical parameters including reagent purity and tissue culture conditions.

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  • Employed advanced flow cytometry techniques for efficient cell sorting.
  • Developed a method for direct recovery of transfected DNA from sorted cells.

    • Main Results:

    • Achieved nearly 100% transfection efficiency in COS-7 cells with high expression levels.
    • Demonstrated efficient cell sorting by minimizing background noise and optimizing signal detection.
    • Successfully recovered transfected DNA constructs from a small number of sorted cells.
    • Cloned the Trop-2 gene by expression using the developed flow cytometry-based method.

    Conclusions:

    • The developed protocol provides a convenient and efficient method for gene cloning.
    • Flow cytometry is a powerful tool for selecting and recovering transfected cells for gene cloning.
    • This technique facilitates the cloning of genes encoding cell surface proteins, such as Trop-2.