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Related Experiment Video

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Correlating intracellular nonviral polyplex localization with transfection efficiency using high-content screening.

Amaraporn Wongrakpanich1, Meng Wu1,2, Aliasger K Salem1

  • 1Dept. of Pharmaceutical Sciences and Experimental Therapeutics, College of Pharmacy, University of Iowa, Iowa City, IA, 52241.

Biotechnology Progress
|July 22, 2015
PubMed
Summary

High-content screening (HCS) offers a powerful method for analyzing gene delivery. This study demonstrates HCS can quantify transfection efficiency and cytotoxicity of nonviral gene vectors, revealing a link between polyplexes and successful transfection.

Keywords:
PEIhigh-content screeningintracellular deliverynonviral gene deliverypolyethyleniminetransfection

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Area of Science:

  • Biotechnology
  • Cellular Imaging
  • Molecular Biology

Background:

  • High-content screening (HCS) is increasingly utilized in cell-based assays for simultaneous multi-parameter data acquisition.
  • While primarily used in drug discovery, HCS has potential applications in other biological research areas.
  • Understanding nonviral gene vector-mediated gene delivery requires efficient methods for evaluating vector performance.

Purpose of the Study:

  • To explore the application of HCS in evaluating nonviral gene vector-mediated gene delivery.
  • To measure transfection efficiency and cytotoxicity of polyethylenimine (PEI)/pDNA polyplexes using HCS.
  • To establish a quantitative relationship between intracellular polyplexes and transfection outcomes.

Main Methods:

  • High-content screening (HCS) was employed to analyze polyplexes composed of fluorescently labeled polyethylenimine (PEI) and pEGFP-N1 plasmid DNA.
  • Transfection efficiency and cytotoxicity were measured simultaneously.
  • Results were validated using conventional, labor-intensive methods.

Main Results:

  • HCS successfully measured transfection efficiency and cytotoxicity of PEI/pDNA polyplexes.
  • A novel correlation was established between the number of polyplexes in the cytoplasm and successful transfection.
  • Successfully transfected cells contained 4-5 polyplex signals, while non-transfected cells had less than one.

Conclusions:

  • High-content screening (HCS) is a valuable tool for the field of gene delivery.
  • HCS enables simultaneous assessment of transfection efficiency and cytotoxicity for diverse nonviral gene vectors.
  • HCS facilitates tracking of gene vectors within subcellular compartments, providing deeper insights into delivery mechanisms.