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Virtual memory T-cells orchestrate extra-lymphoid responses conducive to resident memory

ABSTRACT: Virtual memory T-cells orchestrate extra-lymphoid responses conducive to resident memory

PROVIDER: PRJNA624067 | ENA |

REPOSITORIES: ENA

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Virtual memory T-cells orchestrate extra-lymphoid responses conducive to resident memory

Project description:A primary immune response is typically initiated in secondary lymphoid organs. Virtual memory CD8+ T (TVM) cells are antigen-inexperienced T cells of a central-memory phenotype, acquired through self antigen-driven homeostatic proliferation. Unexpectedly, here we find that, TVM cells are composed of CCR2+ and CCR2- subsets that differentially elaborate a spectrum of effector- and memory-poised functions directly in the tissue. During a primary flu infection, TVM cells rapidly infiltrate the lung in the first day and execute early viral control. TVM cells that recognize viral antigen are retained in the tissue, clonally expand independent of secondary lymphoid organs, and preferentially give rise to tissue-resident memory cells. By orchestrating an extra-lymphoid primary response, heterogenous TVM cells bridge innate reaction and adaptive memory directly in the infected tissue.

2021-06-15 | GSE148364 | GEO

Sm eggs Virtual memory T cells

Project description:Transcriptomics analysis of virtual memory CD8+ T cells after treatment with Schistosoma mansoni eggs.

2018-10-05 | GSE110971 | GEO

Sm eggs Virtual memory T cells

Project description:Sm eggs Virtual memory T cells

| PRJNA435433 | ENA

Generation of virtual memory from relatively highly self-reactive is a mechanism of self-tolerance

Project description:Virtual memory T cell show an intermediate expression profile in between naïve and true memory T cells. Most plausible explanation is that they trigger partial memory differentiation program.

2017-11-09 | GSE90522 | GEO

Analysis of gene-expression in normal, unmanipulated naïve (CD44lo/CD49dlo; CD5lo/CD5hi) and Virtual memory (CD44hi/CD49dlo) T cells

Project description:Splenocytes from lymphoreplete, unmanipulated mice were analyzed for basal mRNA levels. We hypothesized, based on previous data from our lab and others, that many cytokine/inflammatory response genes would show an increase from naïve CD5lo<CD5hi<Virtual memory.

2016-04-19 | GSE78247 | GEO

CD4+ resident memory T cells dominate immunosurveillance and orchestrate local recall responses

Project description:CD4+ resident memory T cells dominate immunosurveillance and orchestrate local recall responses

| PRJNA526716 | ENA

Virtual-Karyotyping with SNP microarrays in morphologically challenging renal cell neoplasms

2009-03-13 | GSE14670 | GEO

Virtual-Karyotyping with SNP microarrays in morphologically challenging renal cell neoplasms

Project description:Genetic lesions characteristic for RCC subtypes can be identified by virtual karyotyping with SNP microarrays. In this study, we examined whether virtual karyotypes could be used to better classify a cohort of morphologically challenging/unclassified RCC. Tumor resection specimens from 17 patients were profiled by virtual karyotyping with Affymetrix 10K 2.0 or 250K Nsp SNP Mapping arrays and were also evaluated independently by a panel of seven genito-urinary pathologists. Tumors were classified by the established pattern of genomic imbalances based on a reference cohort of 98 cases with classic morphology and compared to the morphologic diagnosis of the pathologist panel. In 3 cases, samples from areas with different morphologic appearance were also tested (n=5).

2009-03-13 | E-GEOD-14670 | biostudies-arrayexpress

Virtual Karyotyping of Androgen Insensitive Prostate Cancer

Project description:We investigated chromosomal imbalances in samples from patients with androgen insensitive prostate cancer. 4 archival FFPE tumor samples were analyzed with Affymetrix 250K Nsp SNP microarrays and virtual-karyotype results for PTEN region were compared to PTEN deletion analysis by FISH.

2010-04-03 | E-GEOD-13439 | biostudies-arrayexpress

A distinct CD8+ T cell subset derived from virtual memory T cells causes alopecia areata through innate-like cytotoxicity [scRNA-seq]

Project description:Virtual memory T (TVM) cells are a T-cell subtype that exhibit a memory phenotype without prior exposure to a foreign antigen. Although several recent studies suggest that TVM cells exert anti-viral and anti-bacterial function, pathological roles of TVM cells causing inflammatory diseases have not been studied. Here, we identified a novel CD8+ T-cell subset (CD44s-hiCD49dlo CD8+ T cells), which is originated from TVM cells and can cause a chronic inflammatory disease, alopecia areata (AA). In the skin of alopecic mice, we detected a distinct TVM-cell subpopulation characterized by superior expression of CD44 and features of tissue residency, which was transcriptionally, phenotypically, and functionally distinct from conventional CD8+ TVM cells. Mechanistically, this cell population could be induced from conventional TVM cells by IL-12, IL-15, and IL-18 stimulation. Moreover, the pathological activity of CD44s-hiCD49dlo CD8+ T cells was mediated by NKG2D-depedent innate-like cytotoxicity against target cells, which was further augmented by IL-15 stimulation and triggered the onset of disease. Collectively, our results suggest a new immunological mechanism through which TVM cells can cause chronic inflammatory disease by innate-like cytotoxicity.

2023-05-16 | GSE229581 | GEO

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