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Localized lentivirus delivery via peptide interactions.

Michael Skoumal1, Stephanie Seidlits2, Seungjin Shin3

  • 1Department of Chemical Engineering, University of Michigan, Ann Arbor, Michigan.

Biotechnology and Bioengineering
|February 26, 2016
PubMed
Summary

Researchers enhanced gene delivery using modified hydrogels to improve transgene expression in regenerative medicine. Poly(ethylene-glycol) hydrogels with poly-l-lysine or affinity peptides effectively retained lentivirus, boosting expression levels.

Keywords:
lentiviruslocalized gene deliveryphage displaypolylysine

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Area of Science:

  • Biomaterials Science
  • Gene Therapy
  • Regenerative Medicine

Background:

  • Gene delivery from biomaterial scaffolds is crucial for regenerative medicine.
  • Viral vector delivery involves a balance between retention and release.
  • Enhancing transgene expression requires optimized vector delivery systems.

Purpose of the Study:

  • To design hydrogels that retain viral vectors for enhanced transgene expression.
  • To investigate the role of poly-l-lysine (PLL) molecular weight and concentration in lentivirus binding.
  • To identify alternative affinity peptides for improved lentivirus retention.

Main Methods:

  • Poly(ethylene-glycol) (PEG) hydrogels were modified with poly-l-lysine (PLL) to bind lentivirus.
  • The effect of PLL molecular weight and incubation time on virus adsorption was studied.
  • Phage display technology was used to identify VSV-G specific affinity peptides.

Main Results:

  • Increasing PLL molecular weight enhanced transgene expression.
  • Adsorbed lentivirus exhibited a 20% longer half-life at 37°C.
  • Affinity peptides increased transgene expression 20-fold compared to control peptides.

Conclusions:

  • Modifying hydrogels with affinity proteins or peptides is a powerful strategy to enhance and localize transgene expression.
  • This approach offers a promising method for improving gene delivery in regenerative medicine applications.