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Related Experiment Video

Updated: Mar 18, 2026

Packaging HIV- or FIV-based Lentivector Expression Constructs & Transduction of VSV-G Pseudotyped Viral Particles
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An Optimized Protocol for Packaging Pseudotyped Integrase Defective Lentivirus.

Ranjita Sengupta1, Chandreyee Mukherjee1, Nandita Sarkar2

  • 1System Biosciences (SBI), 265 North Whisman Rd., Mountain View, CA 94043 USA.

Biological Procedures Online
|July 13, 2016
PubMed
Summary

A new integrase-deficient lentiviral packaging system (NILVP) was developed for efficient gene delivery without genomic integration. This system enhances lentivirus packaging and gene expression in various cell types.

Keywords:
Integrase defective lentiviruslentiviral packageviral transduction

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Area of Science:

  • Molecular Biology
  • Gene Therapy
  • Virology

Background:

  • Integrase-deficient lentiviruses (IDLVs) are crucial for gene delivery and epichromosomal expression.
  • Existing IDLV packaging systems lack comparative performance data.

Purpose of the Study:

  • To systematically evaluate and optimize integrase-deficient lentiviral packaging systems.
  • To develop an efficient and standardized protocol for non-integrative lentiviral packaging (NILVP).

Main Methods:

  • Generated five integrase-deficient mutants via site-directed mutagenesis.
  • Assessed packaging efficiency and GFP expression in HT1080 cells using pseudotyped viral particles.
  • Confirmed non-integrative nature using quantitative PCR in dividing and non-dividing cells.

Main Results:

  • Identified one optimal integrase mutant demonstrating superior GFP transgene expression.
  • Validated the non-integrative capability of the selected mutant.
  • Developed a standard protocol for NILVP using the optimized mutant.

Conclusions:

  • Established an efficient lentiviral packaging system for producing non-integrative lentivirus.
  • The NILVP system is compatible with existing lentivectors.
  • The system effectively transduces both dividing and non-dividing cells.