Publication details
Clonal selection in the human V delta 1 T cell repertoire indicates gamma delta TCR-dependent adaptive immune surveillance
| Authors | |
|---|---|
| Year of publication | 2017 |
| Type | Article in Periodical |
| Magazine / Source | Nature Communications |
| MU Faculty or unit | |
| Citation | |
| Web | https://www.nature.com/articles/ncomms14760.pdf |
| Doi | http://dx.doi.org/10.1038/ncomms14760 |
| Keywords | STRESS-SURVEILLANCE; ANTIGEN RECOGNITION; CYTOMEGALOVIRUS; RECEPTOR; TRANSPLANTATION; INFECTION; COMPLEX; MEMORY; AGE; DIFFERENTIATION |
| Description | gamma delta Tcells are considered to be innate-like lymphocytes that respond rapidly to stress without clonal selection and differentiation. Here we use next-generation sequencing to probe how this paradigm relates to human V delta 2(neg) T cells, implicated in responses to viral infection and cancer. The prevalent V delta 1 T cell receptor (TCR) repertoire is private and initially unfocused in cord blood, typically becoming strongly focused on a few high-frequency clonotypes by adulthood. Clonal expansions have differentiated from a naive to effector phenotype associated with CD27 downregulation, retaining proliferative capacity and TCR sensitivity, displaying increased cytotoxic markers and altered homing capabilities, and remaining relatively stable over time. Contrastingly, V delta 2(+) T cells express semi-invariant TCRs, which are present at birth and shared between individuals. Human V delta 1(+) T cells have therefore evolved a distinct biology from the V delta 2(+) subset, involving a central, personalized role for the gamma delta TCR in directing a highly adaptive yet unconventional form of immune surveillance. |