Thymic iNKT single cell analyses unmask the common developmental program of mouse innate T cells

S. Harsha Krovi, Jingjing Zhang, Mary Jessamine Michaels-Foster, Tonya Brunetti, Liyen Loh, James Scott-Browne and Laurent Gapin ()
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S. Harsha Krovi: University of Colorado Anschutz Medical Campus
Jingjing Zhang: University of Colorado Anschutz Medical Campus
Mary Jessamine Michaels-Foster: University of Colorado Anschutz Medical Campus
Tonya Brunetti: University of Colorado Anschutz Medical Campus
Liyen Loh: University of Colorado Anschutz Medical Campus
James Scott-Browne: University of Colorado Anschutz Medical Campus
Laurent Gapin: University of Colorado Anschutz Medical Campus

Nature Communications, 2020, vol. 11, issue 1, 1-15

Abstract: Abstract Most T lymphocytes leave the thymus as naïve cells with limited functionality. However, unique populations of innate-like T cells differentiate into functionally distinct effector subsets during their development in the thymus. Here, we profiled >10,000 differentiating thymic invariant natural killer T (iNKT) cells using single-cell RNA sequencing to produce a comprehensive transcriptional landscape that highlights their maturation, function, and fate decisions at homeostasis. Our results reveal transcriptional profiles that are broadly shared between iNKT and mucosal-associated invariant T (MAIT) cells, illustrating a common core developmental program. We further unmask a mutual requirement for Hivep3, a zinc finger transcription factor and adapter protein. Hivep3 is expressed in early precursors and regulates the post-selection proliferative burst, differentiation and functions of iNKT cells. Altogether, our results highlight the common requirements for the development of innate-like T cells with a focus on how Hivep3 impacts the maturation of these lymphocytes.

Date: 2020
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DOI: 10.1038/s41467-020-20073-8

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