Hobit identifies TRM precursors that are regulated by Eomes
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ABSTRACT:
ORGANISM(S): Mus musculus
PROVIDER: GSE182343 | GEO | 2021/08/19
REPOSITORIES: GEO
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Project description:Tissue-resident memory T cells (Trm) are non-circulating memory T cells that localize to portals of pathogen entry such as the skin, gut and lung where they provide efficient early protection against reinfection. Trm are characterized by a molecular profile that actively prevents egress from peripheral sites including the constitutive expression of the lectin CD69 and down-regulation of the chemokine receptor (CCR)7 and sphingosine-1-phosphate receptor 1 (S1PR1). This program is partially mediated by down-regulation of the transcription factor KLF2; however, to date no transcriptional regulator specific to Trm has been identified. Here we show that the Blimp1 related transcription factor Hobit is specifically upregulated in Trm and together with Blimp1, mediates the development and maintenance of Trm in various tissues including skin, gut, liver and kidney. Importantly, we found that the Hobit/Blimp1 transcriptional module is also required for other tissue-resident lymphocytes including Natural Killer T (NKT) cells and liver tissue-resident NK cells (trNK). We show that these populations share a universal transcriptional program with Trm instructed by Hobit and Blimp1 that includes the repression of CCR7, S1PR1 and KLF2 thereby enforcing tissue retention. Our results identify Hobit and Blimp1 as major common regulators that drive the differentiation of distinct populations of tissue-resident lymphocytes.
2016-04-25 | GSE70813 | GEO
Project description:Tissue-resident memory T cells (Trm) permanently localize to portals of pathogen entry, where they provide immediate protection against re-infection. To enforce tissue retention, Trm upregulate CD69 and downregulate molecules associated with tissue egress including CCR7 and S1PR1. Although suppression of the transcription factor KLF2 in Trm prevents S1PR1-driven migration, a Trm-specific transcriptional regulator has not been identified. Here, we show that the transcription factor Hobit is specifically upregulated in Trm and together with related Blimp1, mediates the development of Trm in skin, gut, liver and kidney. Importantly, the Hobit/Blimp1 transcriptional module is also required for other populations of tissue-resident lymphocytes including NKT cells and liver-resident NK cells, all of which share a common transcriptional program that includes repression of Ccr7, S1pr1, and Klf2. Our results identify Hobit and Blimp1 as central regulators of this universal program that instructs tissue retention in diverse tissue-resident lymphocyte populations.
2016-04-25 | GSE79339 | GEO
Project description:Although tissue resident memory T (TRM) cells have been shown to regulate host protection in infectious disorders, their functional role in inflammatory bowel diseases (IBD) remains to be investigated. Here, we characterized TRM cells in human IBD and addressed their role in experimental models of intestinal inflammation with mice deficient for TRM-associated transcription factors and by TRM depletion. We show that pro-inflammatory TRM cells are increased in active IBD. Moreover, the presence of CD4+ but not CD8+ TRM cells in IBD patients predicts subsequent development of flares. In vivo, mice deficient in Hobit and Blimp-1 are protected from several models of colitis due to decreased pro-inflammatory cytokine secretion, impaired cytotoxicity and leukocyte chemotaxis. Finally, P2X7-induced TRM depletion via NAD enema leads to suppression of colitis activity. Taken together, our data argue for a central role of TRM cells in the pathogenesis of IBD and suggest that these cells are an interesting target for future therapeutic approaches.
2018-11-25 | GSE122880 | GEO
Project description:The networks of transcription factors (TFs) that control multipotency versus effector programs in intestinal resident memory T (TRM) cells are poorly understood. Mice with post-activation, conditional deletion of the TF Bcl11b in CD8+ T cells, infected with a food-born pathogen, had increased numbers of intestinal TRM cells, and their precursors and decreased splenic effector cells and circulating memory cells and precursors. Loss of circulating memory cells was in part due to increased intestinal homing of Bcl11b-/- circulating precursors with no major alterations in their programs. Bcl11b-/- memory CD8+ T cells had an impaired recall response despite their accumulation in the gut. Intestinal Bcl11b-/- TRM cells and their precursors manifested major alterations in the residency program, with diminished expression of multipotency program genes and upregulation of the effector program genes. Integration of transcriptomics with chromatin accessibility, activating histone marks and Bcl11b genome binding showed a link between the reduction in the multipotent program genes with regions of decreased chromatin accessibility and activating histone marks in Bcl11b-/- cells. In contrast, the effector program genes displayed increased activating epigenetic status. We propose that Bcl11b regulates tissue resident TRM program genes and is positioned upstream of Tcf1 and Blimp1 in regulation of multipotency versus effector TRM program, respectively. Rescuing experiments normalized the increased numbers of intestinal Bcl11b-/- TRM cells. Thus, Bcl11b is a frontrunner in the memory tissue residency program and acts early in lineage decision, promoting TRM cell multipotency and restricting effector function.
2023-06-09 | GSE222914 | GEO
Project description:The networks of transcription factors (TFs) that control multipotency versus effector programs in intestinal resident memory T (TRM) cells are poorly understood. Mice with post-activation, conditional deletion of the TF Bcl11b in CD8+ T cells, infected with a food-born pathogen, had increased numbers of intestinal TRM cells, and their precursors and decreased splenic effector cells and circulating memory cells and precursors. Loss of circulating memory cells was in part due to increased intestinal homing of Bcl11b-/- circulating precursors with no major alterations in their programs. Bcl11b-/- memory CD8+ T cells had an impaired recall response despite their accumulation in the gut. Intestinal Bcl11b-/- TRM cells and their precursors manifested major alterations in the residency program, with diminished expression of multipotency program genes and upregulation of the effector program genes. Integration of transcriptomics with chromatin accessibility, activating histone marks and Bcl11b genome binding showed a link between the reduction in the multipotent program genes with regions of decreased chromatin accessibility and activating histone marks in Bcl11b-/- cells. In contrast, the effector program genes displayed increased activating epigenetic status. We propose that Bcl11b regulates tissue resident TRM program genes and is positioned upstream of Tcf1 and Blimp1 in regulation of multipotency versus effector TRM program, respectively. Rescuing experiments normalized the increased numbers of intestinal Bcl11b-/- TRM cells. Thus, Bcl11b is a frontrunner in the memory tissue residency program and acts early in lineage decision, promoting TRM cell multipotency and restricting effector function.
2023-06-09 | GSE222913 | GEO
Project description:The networks of transcription factors (TFs) that control multipotency versus effector programs in intestinal resident memory T (TRM) cells are poorly understood. Mice with post-activation, conditional deletion of the TF Bcl11b in CD8+ T cells, infected with a food-born pathogen, had increased numbers of intestinal TRM cells, and their precursors and decreased splenic effector cells and circulating memory cells and precursors. Loss of circulating memory cells was in part due to increased intestinal homing of Bcl11b-/- circulating precursors with no major alterations in their programs. Bcl11b-/- memory CD8+ T cells had an impaired recall response despite their accumulation in the gut. Intestinal Bcl11b-/- TRM cells and their precursors manifested major alterations in the residency program, with diminished expression of multipotency program genes and upregulation of the effector program genes. Integration of transcriptomics with chromatin accessibility, activating histone marks and Bcl11b genome binding showed a link between the reduction in the multipotent program genes with regions of decreased chromatin accessibility and activating histone marks in Bcl11b-/- cells. In contrast, the effector program genes displayed increased activating epigenetic status. We propose that Bcl11b regulates tissue resident TRM program genes and is positioned upstream of Tcf1 and Blimp1 in regulation of multipotency versus effector TRM program, respectively. Rescuing experiments normalized the increased numbers of intestinal Bcl11b-/- TRM cells. Thus, Bcl11b is a frontrunner in the memory tissue residency program and acts early in lineage decision, promoting TRM cell multipotency and restricting effector function.
2023-06-09 | GSE222912 | GEO
Project description:The networks of transcription factors (TFs) that control multipotency versus effector programs in intestinal resident memory T (TRM) cells are poorly understood. Mice with post-activation, conditional deletion of the TF Bcl11b in CD8+ T cells, infected with a food-born pathogen, had increased numbers of intestinal TRM cells, and their precursors and decreased splenic effector cells and circulating memory cells and precursors. Loss of circulating memory cells was in part due to increased intestinal homing of Bcl11b-/- circulating precursors with no major alterations in their programs. Bcl11b-/- memory CD8+ T cells had an impaired recall response despite their accumulation in the gut. Intestinal Bcl11b-/- TRM cells and their precursors manifested major alterations in the residency program, with diminished expression of multipotency program genes and upregulation of the effector program genes. Integration of transcriptomics with chromatin accessibility, activating histone marks and Bcl11b genome binding showed a link between the reduction in the multipotent program genes with regions of decreased chromatin accessibility and activating histone marks in Bcl11b-/- cells. In contrast, the effector program genes displayed increased activating epigenetic status. We propose that Bcl11b regulates tissue resident TRM program genes and is positioned upstream of Tcf1 and Blimp1 in regulation of multipotency versus effector TRM program, respectively. Rescuing experiments normalized the increased numbers of intestinal Bcl11b-/- TRM cells. Thus, Bcl11b is a frontrunner in the memory tissue residency program and acts early in lineage decision, promoting TRM cell multipotency and restricting effector function.
2023-06-09 | GSE222911 | GEO
Project description:Transforming growth factor β (TGFβ) is a morphogenic protein that augments antiviral immunity by altering the functional properties of pathogen-specific memory CD8 T cells. During infection, TGFβ inhibits formation of effector (TEFF) and circulating memory CD8 T cells, while encouraging tissue-resident memory CD8 T cells (TRM) to settle in peripheral tissues. SMAD proteins are signaling intermediates that are used by members of the TGF cytokine family to modify gene expression. Using RNA-sequencing we determined that SMAD4 altered the transcriptional profile of antiviral CTLs during respiratory infection. Our data show that SMAD4 and TGFβ use alternate signaling pathways to cooperatively regulate a collection of genes that determine whether pathogen-specific memory CD8 T cells localize in peripheral or lymphoid tissues. During infection, SMAD4 acts independently of TGF to inhibit TRM development, while inducing genes that support formation of circulating memory CD8 T cells. The genes that are modulated by SMAD4 include several homing receptors (CD103, KLRG1 and CD62L) and transcription factors (Hobit and EOMES) that support memory formation.
2021-12-22 | GSE151637 | GEO
Project description:Tissue resident memory (Trm) represent a newly described memory T cell population. We have previously characterized a population of Trm that persists within the brain following acute virus infection. Although capable of providing marked protection against a subsequent local challenge, brain Trm do not undergo recall expansion following dissociation from the tissue. Furthermore, these Trm do not depend on the same survival factors as the circulating memory T cell pool as assessed either in vivo or in vitro. To gain greater insight into this population of cells we compared the gene-expression profiles of Trm isolated from the brain to circulating memory T cells isolated from the spleen following an acute virus infection. Trm displayed altered expression of genes involved in chemotaxis, expressed a distinct set of transcription factors and overexpressed several inhibitory receptors. Cumulatively, these data indicates that Trm are a distinct memory T cell population disconnected from the circulating memory T cell pool and displaying a unique molecular signature which likely results in optimal survival and function within their local environment. 13 samples were analyzed: 5 replicates of memory OT-I CD8+.CD103- T cells isolated from the spleen of mice on day 20 p.i. with VSV-OVA. 5 replicates of memory OT-I CD8+CD103+ T cells isolated from the brain of mice on day 20 p.i. with VSV-OVA; and 3 replicates of memory OT-I.CD8+ CD103- T cells isolated from the brain of mice on day 20 p.i. with VSV-OVA
2012-08-29 | E-GEOD-39152 | biostudies-arrayexpress
Project description:Lung resident memory (Trm) CD8 T cells induced by influenza A virus (IAV), are pivotal for providing heterosubtypic immunity, but are not maintained long term, causing gradual loss of protection. This contrasts sharply with long-term maintenance of Trm induced by localized infections of the skin and other tissues. Here we show that the decline in lung Trm is determined by an imbalance between apoptosis and lung recruitment/conversion to Trm of circulating memory cells. At the cellular level, circulating effector memory (Tem) rather than central memory (Tcm) cells are the precursors for conversion to lung Trm. Time-dependent changes in expression of genes critical for Trm differentiation together with enrichment of Tcm diminish the capacity of circulating memory CD8 T cells to form Trm, explaining why IAV-induced Trm are not stably maintained over time. Importantly, systemic booster immunization, through increasing the number of circulating Tem cells, induces an increase in lung Trm pool, providing a new rational for future IAV vaccines.
2016-11-18 | GSE86973 | GEO