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Abstract

Engineering

Enrich and Expand Rare Antigen-specific T Cells with Magnetic Nanoparticles

Published: November 17th, 2018

DOI:

10.3791/58640

1Department of Biomedical Engineering, School of Medicine, Johns Hopkins University, 2Institute for Cell Engineering, School of Medicine, Johns Hopkins University, 3Institute for Nanobiotechnology, Johns Hopkins University, 4Department of Pathology, School of Medicine, Johns Hopkins University

Abstract

We have developed a tool to both enrich and expand antigen-specific T cells. This can be helpful in cases such as to A) detect the existence of antigen-specific T cells, B) probe the dynamics of antigen-specific responses, C) understand how antigen-specific responses affect disease state such as autoimmunity, D) demystify heterogeneous responses for antigen-specific T cells, or E) utilize antigen-specific cells for therapy. The tool is based on a magnetic particle that we conjugate antigen-specific and T cell co-stimulatory signals, and that we term as artificial antigen presenting cells (aAPCs). Consequently, since the technology is simple to produce, it can easily be adopted by other laboratories; thus, our purpose here is to describe in detail the fabrication and subsequent use of the aAPCs. We explain how to attach antigen-specific and co-stimulatory signals to the aAPCs, how to utilize them to enrich for antigen-specific T cells, and how to expand antigen-specific T cells. Furthermore, we will highlight engineering design considerations based on experimental and biological information of our experience with characterizing antigen-specific T cells.

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Keywords Magnetic Nanoparticles

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