Abstract
The transcription factor T-bet is critical for cytotoxic T lymphocyte (CTL) differentiation, but it is unclear how it operates in a graded manner in the formation of both terminal effector and memory precursor cells during viral infection. We find that, at high concentrations, T-bet induced expression of Zeb2 mRNA, which then triggered CTLs to adopt terminally differentiated states. ZEB2 and T-bet cooperate to switch on a terminal CTL differentiation program, while simultaneously repressing genes necessary for central memory CTL development. Chromatin immunoprecipitation sequencing showed that a large proportion of these genes were bound by T-bet, and this binding was altered by ZEB2 deficiency. Furthermore, T-bet overexpression could not fully bypass ZEB2 function. Thus, the coordinated actions of T-bet and ZEB2 outline a novel genetic pathway that forces commitment of CTLs to terminal differentiation, thereby restricting their memory cell potential.
© 2015 Dominguez et al.
Publication types
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Research Support, N.I.H., Extramural
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Research Support, Non-U.S. Gov't
MeSH terms
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Animals
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CD8-Positive T-Lymphocytes / immunology
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CD8-Positive T-Lymphocytes / metabolism
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Cell Differentiation / genetics
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Cell Differentiation / immunology*
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Cluster Analysis
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Flow Cytometry
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Homeodomain Proteins / genetics
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Homeodomain Proteins / immunology*
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Host-Pathogen Interactions / immunology
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Lectins, C-Type
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Lymphocytic Choriomeningitis / genetics
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Lymphocytic Choriomeningitis / immunology*
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Lymphocytic Choriomeningitis / virology
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Lymphocytic choriomeningitis virus / immunology
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Lymphocytic choriomeningitis virus / physiology
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Mice, Inbred C57BL
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Mice, Knockout
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Mice, Transgenic
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Oligonucleotide Array Sequence Analysis
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Protein Binding / immunology
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Receptors, Immunologic / immunology
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Receptors, Immunologic / metabolism
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Repressor Proteins / deficiency
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Repressor Proteins / genetics
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Repressor Proteins / immunology*
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Reverse Transcriptase Polymerase Chain Reaction
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T-Box Domain Proteins / genetics
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T-Box Domain Proteins / immunology*
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T-Box Domain Proteins / metabolism
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T-Lymphocytes, Cytotoxic / immunology*
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T-Lymphocytes, Cytotoxic / metabolism
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Transcriptome / genetics
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Transcriptome / immunology
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Zinc Finger E-box Binding Homeobox 2
Substances
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Homeodomain Proteins
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Klrg1 protein, mouse
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Lectins, C-Type
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Receptors, Immunologic
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Repressor Proteins
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T-Box Domain Proteins
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T-box transcription factor TBX21
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ZEB2 protein, mouse
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Zinc Finger E-box Binding Homeobox 2