T-cell epitope identification
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United States of America Patent
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Mar 25, 2015
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Mar 27, 2014
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Abstract
The present invention is a method for determining the identity of the epitopes recognized by T-cells. The method consists of expressing an encoded library of candidate epitope sequences in a recipient reporter cell capable of providing a detectable signal upon cytotoxic attack from a single cognate T-cell followed by contacting the reporter cells with T-cells of interest. The reporter cells with a single indicating cytotoxic attack from a T-cell are isolated and then analyzed by next-generation sequencing in order to identify the epitope sequences. Specifically disclosed is a method in which a library of candidate epitope-encoding nucleic acids are expressed in cells which feature a membrane-bound major histocompatibility complex (MHC) protein, said library produced by transfection of plasmids featuring both a nucleotide encoding the candidate epitope and a nucleotide encoding a FRET-based fluorescent protein cleaved by granzyme.
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