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MRI-visible polymeric vector bearing CD3 single chain antibody for gene delivery to T cells for immunosuppression

Paper ID Volume ID Publish Year Pages File Format Full-Text
10605 693 1970 9 PDF Available
Title
MRI-visible polymeric vector bearing CD3 single chain antibody for gene delivery to T cells for immunosuppression
Abstract

Gene therapy mediated by nonviral vectors provides great advantages over conventional drug therapy in inducing immunosuppression after organ transplantation, yet it was rarely reported because T cells are normally difficult to transfect. In this paper, a nonviral vector that effectively transports genes into T cells is developed by attaching a T cell specific ligand, the CD3 single chain antibody (scAbCD3), to the distal ends of poly(ethylene glycol)-grafted polyethylenimine (scAbCD3-PEG-g-PEI). This polymer was first complexed with superparamagnetic iron oxide nanoparticles (SPIONs) and was then used to condense plasmid DNA into nanoparticles with an ideally small size and low cytotoxicity. Based on a reporter gene assay, targeting ligand functionalization of the delivery agent leads to 16 fold of enhancement in the gene transfection level in HB8521 cells, a rat T lymphocyte line. This targeting event in cell culture was successfully imaged by MRI scan. Inspiringly, delivery of a therapeutic gene DGKα with our MRI-visible delivery agent was likewise efficient, resulting in a 43% inhibition in the stimulated proliferation of HB8521 cells as well as a 38% inhibition in the expression of a major functional cytokine interleukin-2 (IL-2), indicating the effective T cell anergy induced by gene therapy.

Keywords
Immunosuppression; Targeted gene delivery; T cell anergy; Nonviral vector; Magnetic resonance imaging
First Page Preview
MRI-visible polymeric vector bearing CD3 single chain antibody for gene delivery to T cells for immunosuppression
Publisher
Database: Elsevier - ScienceDirect
Journal: Biomaterials - Volume 30, Issue 10, April 2009, Pages 1962–1970
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering