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Engineering novel cell surface receptors for virus-mediated gene transfer
J H Lee1, T J Baker, L K Mahal
1Howard Hughes Medical Institute and Departments of Internal Medicine and Physiology and Biophysics, University of Iowa, Iowa City, Iowa 52242, USA. mjwelsh@blue.weeg.uiowa.edu
The Journal of Biological Chemistry
|July 27, 1999
Summary
Researchers engineered cells to display artificial adenovirus receptors using a novel sugar (ManLev). This strategy enhances gene transfer efficiency in resistant cells, paving the way for improved viral vector therapies.
Area of Science:
- Biochemistry
- Molecular Biology
- Gene Therapy
Background:
- Viral receptor absence limits gene transfer efficiency in target cells.
- Adenovirus vectors are crucial tools for gene therapy but face barriers in certain cell types.
Purpose of the Study:
- To develop a novel strategy for enhancing adenoviral gene transfer.
- To engineer artificial cell-surface receptors using unnatural sugars.
Main Methods:
- Cells were fed a modified mannosamine (ManLev) to incorporate it into cell-surface glycoconjugates.
- A ketone group on ManLev was used to covalently attach biotin hydrazide, creating an artificial adenovirus receptor.
- Adenoviral vector binding and gene transfer efficiency were assessed in engineered cells.
Main Results:
- The synthetic sugar ManLev was successfully incorporated into cell-surface glycoconjugates.
- The artificial receptor enhanced adenoviral vector binding to cells.
- Gene transfer efficiency was significantly improved in cells resistant to adenovirus infection.
Conclusions:
- This study demonstrates the feasibility of using cellular biosynthetic machinery to create novel cell-surface sugars.
- Engineered sugars can serve as platforms for artificial receptors to enhance viral vector gene transfer.
- This approach offers a promising strategy to overcome barriers in gene therapy delivery.