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T resident memory cell

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https://www.readbyqxmd.com/read/29031786/differentiation-and-protective-capacity-of-virus-specific-cd8-t-cells-suggest-murine-norovirus-persistence-in-an-immune-privileged-enteric-niche
#1
Vesselin T Tomov, Olesya Palko, Chi Wai Lau, Ajinkya Pattekar, Yuhang Sun, Ralitza Tacheva, Bertram Bengsch, Sasikanth Manne, Gabriela L Cosma, Laurence C Eisenlohr, Timothy J Nice, Herbert W Virgin, E John Wherry
Noroviruses can establish chronic infections with active viral shedding in healthy humans but whether persistence is associated with adaptive immune dysfunction is unknown. We used genetically engineered strains of mouse norovirus (MNV) to investigate CD8(+) T cell differentiation during chronic infection. We found that chronic infection drove MNV-specific tissue-resident memory (Trm) CD8(+) T cells to a differentiation state resembling inflationary effector responses against latent cytomegalovirus with only limited evidence of exhaustion...
October 10, 2017: Immunity
https://www.readbyqxmd.com/read/29021139/paxillin-binding-to-the-cytoplasmic-domain-of-cd103-promotes-cell-adhesion-and-effector-functions-for-cd8-resident-memory-t-cells-in-tumors
#2
Ludiane Gauthier, Stephanie Corgnac, Marie Boutet, Gwendoline Gros, Pierre Validire, Georges Bismuth, Fathia Mami-Chouaib
CD8+/CD103+ tissue resident memory T cells (TRM cells) accumulate in several human solid tumors where they have been associated with a favorable prognosis. However, the role of CD103 - the α subunit of the integrin αEβ7 (also known as CD103) - in the retention and functions of these TRM is undefined. In this report, we investigated the role of CD103 cytoplasmic domain and the focal adhesion-associated protein paxillin (Pxn) in downstream signaling and functional activities triggered through αE/CD103 chain...
October 11, 2017: Cancer Research
https://www.readbyqxmd.com/read/28987475/current-perspectives-on-the-role-of-cd8-t-cells-in-systemic-sclerosis
#3
REVIEW
Patrizia Fuschiotti
Despite long-standing recognition of the importance of T cells in systemic sclerosis (SSc; scleroderma), the role of CD8(+) T cells in disease pathogenesis has not been well studied. Our work has shown that over-production of the pro-fibrotic cytokine IL-13 by peripheral blood effector/memory CD8(+) T cells is critical for predisposing patients to more severe forms of cutaneous fibrosis. Moreover, IL-13-producing CD8(+) T cells induce a pro-fibrotic phenotype in normal and SSc dermal fibroblasts, and exhibit a strong cytotoxic activity ex vivo...
October 5, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28956763/a-novel-role-for-il-17-in-enhancing-type-1-helper-t-cell-immunity-in-the-female-genital-tract-following-mucosal-hsv-2-vaccination
#4
Puja Bagri, Varun C Anipindi, Philip V Nguyen, Danielle Vitali, Martin R Stämpfli, Charu Kaushic
It is well established that interferon-gamma (IFN-γ) production by CD4(+) T cells is critical for anti-viral immunity against herpes simplex virus type 2 (HSV-2) genital infection. However, the role of interleukin-17A (IL-17A) production by CD4(+) T cells in HSV-2 anti-viral immunity is yet to be elucidated. Here, we demonstrate that IL-17A plays an important role in enhancing anti-viral T helper type 1 (Th1) responses in the female genital tract (FGT), and is essential for effective protection conferred by HSV-2 vaccination...
September 27, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28955177/modeling-a-superorganism-considerations-regarding-the-use-of-dirty-mice-in-biomedical-research%C3%A2
#5
Aaron C Ericsson, Daniel R Montonye, Cierra R Smith, Craig L Franklin
An ever-expanding body of evidence in both humans and animal models demonstrates the influence of the resident gut microbiota on host health and disease susceptibility. However, as unwanted bacterial, viral, protozoal, and parasitic agents have gradually been eliminated from colonies of purpose-bred laboratory mice, the resident microbiota has lost richness and complexity. Recent studies have shown that the ultra-hygienic environment of traditional laboratory mice and lack of antigenic exposure during development results in mice with an immune system more akin to that of a neonate than an adult human...
September 2017: Yale Journal of Biology and Medicine
https://www.readbyqxmd.com/read/28948612/il-2-is-required-for-the-generation-of-viral-specific-cd4-th1-tissue-resident-memory-cells-and-b-cells-are-essential-for-maintenance-in-the-lung
#6
Brian D Hondowicz, Karen S Kim, Mikel J Ruterbusch, Gladys J Keitany, Marion Pepper
CD4(+) tissue resident cells are an important first line of defense against viral infections in the lungs and are critical for promoting the localization of lung resident CD8(+) T cells. However, relatively little is known about the signaling programs required for the development of viral-specific CD4(+) tissue resident cells in the lungs. Recently, it was shown that signaling through the high affinity IL-2 receptor is required for the differentiation of lung-resident Th2 memory (Trm) cells in a murine model of airway inflammation...
September 26, 2017: European Journal of Immunology
https://www.readbyqxmd.com/read/28942919/organism-level-analysis-of-vaccination-reveals-networks-of-protection-across-tissues
#7
Motohiko Kadoki, Ashwini Patil, Cornelius C Thaiss, Donald J Brooks, Surya Pandey, Deeksha Deep, David Alvarez, Ulrich H von Andrian, Amy J Wagers, Kenta Nakai, Tarjei S Mikkelsen, Magali Soumillon, Nicolas Chevrier
A fundamental challenge in immunology is to decipher the principles governing immune responses at the whole-organism scale. Here, using a comparative infection model, we observe immune signal propagation within and between organs to obtain a dynamic map of immune processes at the organism level. We uncover two inter-organ mechanisms of protective immunity mediated by soluble and cellular factors. First, analyzing ligand-receptor connectivity across tissues reveals that type I IFNs trigger a whole-body antiviral state, protecting the host within hours after skin vaccination...
October 5, 2017: Cell
https://www.readbyqxmd.com/read/28930685/human-tissue-resident-memory-t-cells-are-defined-by-core-transcriptional-and-functional-signatures-in-lymphoid-and-mucosal-sites
#8
Brahma V Kumar, Wenji Ma, Michelle Miron, Tomer Granot, Rebecca S Guyer, Dustin J Carpenter, Takashi Senda, Xiaoyun Sun, Siu-Hong Ho, Harvey Lerner, Amy L Friedman, Yufeng Shen, Donna L Farber
Tissue-resident memory T cells (TRMs) in mice mediate optimal protective immunity to infection and vaccination, while in humans, the existence and properties of TRMs remain unclear. Here, we use a unique human tissue resource to determine whether human tissue memory T cells constitute a distinct subset in diverse mucosal and lymphoid tissues. We identify a core transcriptional profile within the CD69(+) subset of memory CD4(+) and CD8(+) T cells in lung and spleen that is distinct from that of CD69(-) TEM cells in tissues and circulation and defines human TRMs based on homology to the transcriptional profile of mouse CD8(+) TRMs...
September 19, 2017: Cell Reports
https://www.readbyqxmd.com/read/28927891/vitiligo-skin-is-imprinted-with-resident-memory-cd8-t-cells-expressing-cxcr3
#9
Katia Boniface, Clément Jacquemin, Anne-Sophie Darrigade, Benoît Dessarthe, Christina Martins, Nesrine Boukhedouni, Charlotte Vernisse, Alexis Grasseau, Denis Thiolat, Jérôme Rambert, Fabienne Lucchese, Antoine Bertolotti, Khaled Ezzedine, Alain Taieb, Julien Seneschal
Vitiligo is a chronic auto-immune depigmenting skin disorder that results from a loss of melanocytes. Multiple combinatorial factors have been involved in disease development, with a prominent role of the immune system, in particular T cells. After repigmentation, vitiligo frequently recurs in the same area, suggesting that vitiligo could involve the presence of resident memory T cells (TRM). We sought to perform a thorough characterization of the phenotype and function of skin memory T cells in vitiligo. We show that stable and active vitiligo perilesional skin is enriched with a population of CD8 TRM expressing both CD69 and CD103 compared to psoriasis and control unaffected skin...
September 16, 2017: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/28920584/liver-resident-nk-cells-and-their-potential-functions
#10
Hui Peng, Rui Sun
Natural killer (NK) cells represent a heterogeneous population of innate lymphocytes with phenotypically and functionally distinct subsets. In particular, recent studies have identified a unique subset of NK cells residing within the liver that are maintained as tissue-resident cells, confer antigen-specific memory responses and exhibit different phenotypical and developmental characteristics compared with conventional NK (cNK) cells. These findings have encouraged researchers to uncover tissue-resident NK cells at other sites, and detailed analyses have revealed that these tissue-resident NK cells share many similarities with liver-resident NK cells and tissue-resident memory T cells...
September 18, 2017: Cellular & Molecular Immunology
https://www.readbyqxmd.com/read/28910403/polymicrobial-sepsis-impairs-bystander-recruitment-of-effector-cells-to-infected-skin-despite-optimal-sensing-and-alarming-function-of-skin-resident-memory-cd8-t-cells
#11
Derek B Danahy, Scott M Anthony, Isaac J Jensen, Stacey M Hartwig, Qiang Shan, Hai-Hui Xue, John T Harty, Thomas S Griffith, Vladimir P Badovinac
Sepsis is a systemic infection that enhances host vulnerability to secondary infections normally controlled by T cells. Using CLP sepsis model, we observed that sepsis induces apoptosis of circulating memory CD8 T-cells (TCIRCM) and diminishes their effector functions, leading to impaired CD8 T-cell mediated protection to systemic pathogen re-infection. In the context of localized re-infections, tissue resident memory CD8 T-cells (TRM) provide robust protection in a variety of infectious models. TRM rapidly 'sense' infection in non-lymphoid tissues and 'alarm' the host by enhancing immune cell recruitment to the site of the infection to accelerate pathogen clearance...
September 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28894184/il-7-plays-a-critical-role-for-the-homeostasis-of-allergen-specific-memory-cd4-t-cells-in-the-lung-and-airways
#12
Seung-Min Yeon, Lea Halim, Anmol Chandele, Curtis J Perry, Sang Hoon Kim, Sun-Uk Kim, Youngjoo Byun, Soon Hong Yuk, Susan M Kaech, Yong Woo Jung
Memory T cells respond rapidly to repeated antigen exposure and can maintain their population for extended periods through self-renewal. These characteristics of memory T cells have mainly been studied during viral infections, whereas their existence and functions in allergic diseases have been studied incompletely. Since allergic patients can suffer repeated relapses caused by intermittent allergen exposure, we hypothesized that allergen- specific memory Th2 cells are present and the factors necessary for the maintenance of these cells are provided by the lung and airways...
September 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28872670/tcr-pmhc-encounter-differentially-regulates-transcriptomes-of-tissue-resident-cd8-t%C3%A2-cells
#13
Akihiro Yoshizawa, Kevin Bi, Derin B Keskin, Guanglan Zhang, Bruce Reinhold, Ellis L Reinherz
To investigate the role of TCR-pMHC interaction in regulating lung CD8 tissue-resident T cell (TR ) differentiation, polyclonal responses were compared against NP366-374 /D(b) and PA224-233 /D(b) , two immunodominant epitopes that arise during influenza A infection in mice. Memory niches distinct from iBALTs develop within the lamina propria, supporting CD103(+) and CD103(-) CD8 TR generation and intraepithelial translocation. Gene set enrichment analysis (GSEA) and weighted gene co-expression network analysis (WGCNA) identify dominant TCR, adherens junction, RIG-I-like and NOD-like pattern recognition receptor as well as TGF-β signaling pathways and memory signatures among PA224-233 /D(b) T cells consistent with T resident memory (TRM ) status...
September 5, 2017: European Journal of Immunology
https://www.readbyqxmd.com/read/28864473/hvem-imprints-memory-potential-on-effector-cd8-t-cells-required-for-protective-mucosal-immunity
#14
Pritesh Desai, Georges Abboud, Jessica Stanfield, Paul G Thomas, Jianxun Song, Carl F Ware, Michael Croft, Shahram Salek-Ardakani
Mucosal immunity to reinfection with a highly virulent virus requires the accumulation and persistence of memory CD8 T cells at the site of primary infection. These cells may derive from memory precursor effector cells (MPECs), which are distinct from short-lived effector cells that provide acute protection but are often destined to die. Using respiratory virus infection, we show that herpes virus entry mediator (HVEM; TNFRSF14), a member of the TNF receptor superfamily, provides key signals for MPEC persistence...
October 15, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28860025/hepatitis-e-virus-induced-primary-cutaneous-cd30-t-cell-lymphoproliferative-disorder
#15
Vincent Mallet, Julie Bruneau, Julien Zuber, Cécile Alanio, Stéphanie Leclerc-Mercier, Anne-Marie Roque-Afonso, Anke R M Kraft, Lucile Couronné, Dominique Roulot, Heiner Wedemeyer, Matthew L Albert, Patrick Hillon, Liliane Laroche, Stanislas Pol, Olivier Hermine
BACKGROUND AND AIM: Several types of unexplained extra-hepatic manifestations, including haematological disorders, have been reported in the context of hepatitis E virus (HEV) infection. However, the underlying mechanism(s) of these manifestations are unknown. We provide evidence that HEV has an extra-hepatic endothelial tropism that can engage cutaneous T cells towards clonality. PATIENT AND METHODS: A patient with a CD30(+) cutaneous T cell lymphoproliferative disorder (T-LPD) and biopsy-proven chronic HEV infection received 3 rounds of oral ribavirin treatment administered either without or with interferon and eventually achieved a sustained virological response (SVR)...
August 28, 2017: Journal of Hepatology
https://www.readbyqxmd.com/read/28855310/chemokine-receptor-dependent-control-of-skin-tissue-resident-memory-t-cell-formation
#16
Ali Zaid, Jyh Liang Hor, Susan N Christo, Joanna R Groom, William R Heath, Laura K Mackay, Scott N Mueller
Infection or inflammation of the skin recruits effector CD8(+) T cells that enter the epidermis and form populations of long-lived tissue-resident memory T (TRM) cells. These skin TRM cells migrate within the constrained epidermal environment by extending multiple dynamic dendritic projections and squeezing between keratinocytes to survey the tissue for pathogens. In this study, we examined the signals required for this distinctive mode of T cell migration by inhibiting key cytoskeletal components and performing intravital two-photon microscopy to visualize TRM cell behavior...
August 30, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28855242/reduced-generation-of-lung-tissue-resident-memory-t-cells-during-infancy
#17
Kyra D Zens, Jun Kui Chen, Rebecca S Guyer, Felix L Wu, Filip Cvetkovski, Michelle Miron, Donna L Farber
Infants suffer disproportionately from respiratory infections and generate reduced vaccine responses compared with adults, although the underlying mechanisms remain unclear. In adult mice, lung-localized, tissue-resident memory T cells (TRMs) mediate optimal protection to respiratory pathogens, and we hypothesized that reduced protection in infancy could be due to impaired establishment of lung TRM. Using an infant mouse model, we demonstrate generation of lung-homing, virus-specific T effectors after influenza infection or live-attenuated vaccination, similar to adults...
October 2, 2017: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/28842633/expression-and-role-of-vla-1-in-resident-memory-cd8-t-cell-responses-to-respiratory-mucosal-viral-vectored-immunization-against-tuberculosis
#18
Siamak Haddadi, Niroshan Thanthrige-Don, Sam Afkhami, Amandeep Khera, Mangalakumari Jeyanathan, Zhou Xing
Lung resident memory T cells (TRM) characterized by selective expression of mucosal integrins VLA-1 (α1β1) and CD103 (αEβ7) are generated following primary respiratory viral infections. Despite recent progress, the generation of lung TRM and the role of mucosal integrins following viral vector respiratory mucosal immunization still remains poorly understood. Here by using a replication-defective viral vector tuberculosis vaccine, we show that lung Ag-specific CD8 T cells express both VLA-1 and CD103 following respiratory mucosal immunization...
August 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28838148/serum-c-reactive-protein-and-congestive-heart-failure-as-significant-predictors-of-herpes-zoster-vaccine-response-in-elderly-nursing-home-residents
#19
Chris P Verschoor, Alina Lelic, Robin Parsons, Carole Evelegh, Jonathan L Bramson, Jennie Johnstone, Mark B Loeb, Dawn M E Bowdish
Background: Elderly long-term care residents often exhibit a myriad of risk factors for immune dysfunction, including chronic inflammation and multiple comorbid conditions, which undoubtedly contribute to their enhanced susceptibility to infection. Hence, understanding the factors required for optimal vaccine responsiveness is critical. Methods: We examined 187 elderly nursing home residents (aged 80-102 years) and 50 community-dwelling seniors (aged 60-75 years) immunized with the live-attenuated varicella-zoster virus (VZV) vaccine...
July 15, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28832609/distinct-aging-profiles-of-cd8-t-cells-in-blood-versus-gastrointestinal-mucosal-compartments
#20
Jeffrey Dock, Christina M Ramirez, Lance Hultin, Mary Ann Hausner, Patricia Hultin, Julie Elliott, Otto O Yang, Peter A Anton, Beth D Jamieson, Rita B Effros
A hallmark of human immunosenescence is the accumulation of late-differentiated memory CD8+ T cells with features of replicative senescence, such as inability to proliferate, absence of CD28 expression, shortened telomeres, loss of telomerase activity, enhanced activation, and increased secretion of inflammatory cytokines. Importantly, oligoclonal expansions of these cells are associated with increased morbidity and mortality risk in elderly humans. Currently, most information on the adaptive immune system is derived from studies using peripheral blood, which contains approximately only 2% of total body lymphocytes...
2017: PloS One
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