Journal
JOURNAL OF IMMUNOLOGICAL METHODS
Volume 375, Issue 1-2, Pages 84-92Publisher
ELSEVIER
DOI: 10.1016/j.jim.2011.09.012
Keywords
TCR V beta CDR3 repertoire diversity in human peripheral blood; Spectratype; Immune reconstitution; Hematopoietic stem cell transplantation
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Funding
- NIH, National Cancer Institute, Center for Cancer Research
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The analysis of T cell receptor diversity provides a clinically relevant and sensitive marker of repertoire loss, gain, or skewing. Spectratyping is a broadly utilized technique to measure global TCR diversity by the analysis of the lengths of CDR3 fragments in each V beta family. However the common use of large numbers of T cells to obtain a global view of TCR V beta CDR3 diversity has restricted spectratyping analyses when limited T-cell numbers are available in clinical setting, such as following transplant regimens. We here demonstrate that one hundred thousand T cells are sufficient to obtain a robust, highly reproducible measure of the global TCR V beta repertoire diversity among twenty V beta families in human peripheral blood. We also show that use of lower cell number results not in a dwindling of observed diversity but rather in non-reproducible patterns in replicate spectratypes. Finally, we report here a simple to use but sensitive method to quantify repertoire divergence in patient samples by comparison to a standard repertoire profile we generated from fifteen normal donors. We provide examples using this method to statistically evaluate the changes in the global TCR V beta repertoire diversity that may take place during T subset immune reconstitution after hematopoietic stem cell transplantation or after immune modulating therapies. Published by Elsevier B.V.
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