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Updated: Sep 30, 2025

Measurement of T Cell Alloreactivity Using Imaging Flow Cytometry
Published on: April 19, 2017
Integrated Analysis Toolset for Defining and Tracking Alloreactive T-cell Clones After Human Solid Organ and
Aleksandar Obradovic1,2, Yufeng Shen2, Megan Sykes1,3,4
1Columbia Center for Translational Immunology, Department of Medicine; Columbia University, New York, NY 10032, United States.
Abstract:
We have developed a suite of tools for integrated analysis of T-Cell-Receptor Sequencing data to define and track alloreactive T-cells in human transplant studies. This has enabled discovery of sequences and patterns of T-cell enrichment and deletion associated with clinical outcomes such as transplant rejection and tolerance. The codebase includes user-friendly default analyses with customizable parameters which greatly accelerate computational workflows and provide robust statistics comparing post-transplant specimens to pre-transplant baseline. It also includes helper functions for robust characterization of T-cell-repertoire diversity, sample-to-sample divergence, resolution of sample-of-origin ambiguity in pooled assays, and functions to output all sequences defined as alloreactive.
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