keyword
MENU ▼
Read by QxMD icon Read
search

T cell exhaustion

keyword
https://www.readbyqxmd.com/read/28747914/extrinsic-protein-tyrosine-phosphatase-non-receptor-22-signals-contribute-to-cd8-t-cell-exhaustion-and-promote-persistence-of-chronic-lymphocytic-choriomeningitis-virus-infection
#1
Tatiana Jofra, Giuseppe Galvani, Mirela Kuka, Roberta Di Fonte, Bechara G Mfarrej, Matteo Iannacone, Shahram Salek-Ardakani, Manuela Battaglia, Georgia Fousteri
A genetic variant of the protein tyrosine phosphatase non-receptor 22 (PTPN22) is associated with a wide range of autoimmune diseases; however, the reasons behind its prevalence in the general population remain not completely understood. Recent evidence highlights an important role of autoimmune susceptibility genetic variants in conferring resistance against certain pathogens. In this study, we examined the role of PTPN22 in persistent infection in mice lacking PTPN22 infected with lymphocytic choriomeningitis virus clone 13...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28736431/combined-blockade-of-t-cell-immunoglobulin-and-mucin-domain-3-and-carcinoembryonic-antigen-related-cell-adhesion-molecule-1-results-in-durable-therapeutic-efficacy-in-mice-with-intracranial-gliomas
#2
Jinhu Li, Xiaodong Liu, Yijun Duan, Yueting Liu, Hongqin Wang, Shizhong Lian, Guotao Zhuang, Yimin Fan
BACKGROUND Glioblastoma multiforme (GBM) evades immune surveillance by inducing immunosuppression via receptor-ligand interactions between immune checkpoint molecules. T cell immunoglobulin and mucin domain 3 (Tim-3) is a key checkpoint receptor responsible for exhaustion and dysfunction of T cells and plays a critical role in immunosuppression. Carcinoembryonic antigen-related cell adhesion molecule 1 (CEACAM1) has been recently identified as a heterophilic ligand for Tim-3. MATERIAL AND METHODS We established an intracranial GBM model using C57BL/6 mice and GL261 cells, and treated the mice with single or combined monoclonal antibodies (mAbs) against Tim-3/CEACAM1...
July 24, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28735813/atypical-memory-b-cells-in-human-chronic-infectious-diseases-an-interim-report
#3
Silvia Portugal, Nyamekye Obeng-Adjei, Susan Moir, Peter D Crompton, Susan K Pierce
Immunological memory is a remarkable phenomenon in which survival of an initial infection by a pathogen leads to life-long protection from disease upon subsequent exposure to that same pathogen. For many infectious diseases, long-lived protective humoral immunity is induced after only a single infection in a process that depends on the generation of memory B cells (MBCs) and long-lived plasma cells. However, over the past decade it has become increasingly evident that many chronic human infectious diseases to which immunity is not readily established, including HIV-AIDS, malaria and TB, are associated with fundamental alterations in the composition and functionality of MBC compartments...
July 11, 2017: Cellular Immunology
https://www.readbyqxmd.com/read/28734175/cd8-t-cell-programming-by-cytomegalovirus-vectors-applications-in-prophylactic-and-therapeutic-vaccination
#4
REVIEW
Klaus Früh, Louis Picker
Vectors based on cytomegalovirus (CMV) represent a novel vaccine platform that maintains high frequencies of non-exhausted effector memory T cells in both CMV sero-positive and sero-negative individuals. In non-human primate models, CMV vectored vaccines provide unprecedented protection against simian immunodeficiency virus (SIV). Moreover, CMV vectors can be genetically altered to program highly diverse CD8+ T cell responses that differ in their epitope targeting including conventional, MHC-I restricted CD8+ T cells as well as unconventional CD8+ T cells restricted by MHC class II or non-polymorphic MHC-E...
July 19, 2017: Current Opinion in Immunology
https://www.readbyqxmd.com/read/28733529/immunotherapy-of-wap-tnp-mice-with-early-stage-mammary-gland-tumors
#5
Michael Bruns, Wolfgang Deppert
The SV40 transgenic BALB/c mouse based WAP-T/WAP-TNP model for triple-negative breast cancer allows the analysis of parameters influencing immunotherapeutic approaches. Except for WAP-TNP tumors expressing the immune-dominant LCMV NP-epitope within SV40 T-antigen (T-AgNP) which is not expressed by T-Ag of WAP-T tumors, the tumors are extremely similar. Comparative anti-PD1/PD-L1 immunotherapy of WAP-T and WAP-TNP mice supported the hypothesis that the immunogenicity of tumor antigen T-cell epitopes strongly influences the success of immune checkpoint blockade therapy, with highly immunogenic T-cell epitopes favoring rapid CTL exhaustion...
June 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/28732506/new-insights-into-blimp-1-in-t-lymphocytes-a-divergent-regulator-of-cell-destiny-and-effector-function
#6
REVIEW
Shin-Huei Fu, Li-Tzu Yeh, Chin-Chen Chu, B Lin-Ju Yen, Huey-Kang Sytwu
B lymphocyte-induced maturation protein-1 (Blimp-1) serves as a master regulator of the development and function of antibody-producing B cells. Given that its function in T lymphocytes has been identified within the past decade, we review recent findings with emphasis on its role in coordinated control of gene expression during the development, differentiation, and function of T cells. Expression of Blimp-1 is mainly confined to activated T cells and is essential for the production of interleukin (IL)-10 by a subset of forkhead box (Fox)p3(+) regulatory T cells with an effector phenotype...
July 21, 2017: Journal of Biomedical Science
https://www.readbyqxmd.com/read/28732279/turbocharging-vaccines-emerging-adjuvants-for-dendritic-cell-based-therapeutic-cancer-vaccines
#7
REVIEW
Mansi Saxena, Nina Bhardwaj
Development of therapeutic cancer vaccines has been hindered by the many pro-tumorigenic mechanisms at play in cancer patients that serve to suppress both antigen presenting cells and T cells. In face of these obstacles, cancer vaccines are most likely to promote anti-tumorigenic immune responses only when formulated with strong adjuvants, and in combination with new immune interventions designed to reverse immune suppression and exhaustion of T cells in the tumor microenvironment. Dendritic cells (DCs) are often termed 'nature's adjuvant' due to their exceptional capacity for initiating both innate and adaptive immune responses...
July 18, 2017: Current Opinion in Immunology
https://www.readbyqxmd.com/read/28727142/genomic-and-transcriptomic-heterogeneity-of-colorectal-tumors-arising-in-lynch-syndrome
#8
Hans Binder, Lydia Hopp, Michal R Schweiger, Steve Hoffmann, Frank Jühling, Martin Kerick, Bernd Timmermann, Susann Siebert, Christina Grimm, Lilit Nersisyan, Arsen Arakelyan, Maria Herberg, Peter Buske, Henry Loeffler-Wirth, Maciej Rosolowski, Christoph Engel, Jens Przybilla, Martin Peifer, Nicolaus Friedrichs, Gabriela Moeslein, Margarete Odenthal, Michelle Hussong, Sophia Peters, Stefanie Holzapfel, Jacob Nattermann, Robert Hueneburg, Wolff Schmiegel, Brigitte Royer-Pokora, Stefan Aretz, Michael Kloth, Matthias Kloor, Reinhard Buettner, Jörg Galle, Markus Loeffler
Colorectal cancer (CRC) arising in Lynch Syndrome (LS) comprises tumors with constitutional mutations in DNA mismatch-repair genes. Whole-genome and transcriptome studies of LS-CRC are still missing to address questions about similarities and differences of mutation and gene expression characteristics between LS-CRC and sporadic CRC, about the molecular heterogeneity of LS-CRC and about specific mechanisms of LS-CRC genesis linked to dysfunctional mismatch-repair in LS colonic mucosa and the possible role of immune editing...
July 20, 2017: Journal of Pathology
https://www.readbyqxmd.com/read/28716576/tlr9-mediated-conditioning-of-liver-environment-is-essential-for-successful-intrahepatic-immunotherapy-and-effective-memory-recall
#9
Marcin Cebula, Mathias Riehn, Upneet Hillebrand, Ramona F Kratzer, Florian Kreppel, Georgia Koutsoumpli, Toos Daemen, Hansjörg Hauser, Dagmar Wirth
Immune defense against hepatotropic viruses such as hepatitis B (HBV) and hepatitis C (HCV) poses a major challenge for therapeutic approaches. Intrahepatic cytotoxic CD8 T cells that are crucial for an immune response against these viruses often become exhausted resulting in chronic infection. We elucidated the T cell response upon therapeutic vaccination in inducible transgenic mouse models in which variable percentages of antigen-expressing hepatocytes can be adjusted, providing mosaic antigen distribution and reflecting the varying viral antigen loads observed in patients...
July 14, 2017: Molecular Therapy: the Journal of the American Society of Gene Therapy
https://www.readbyqxmd.com/read/28715493/host-genetics-play-a-critical-role-in-controlling-cd8-t-cell-function-and-lethal-immunopathology-during-chronic-viral-infection
#10
Allison F Christiaansen, Megan E Schmidt, Stacey M Hartwig, Steven M Varga
Effective CD8 T cell responses are vital for the control of chronic viral infections. Many factors of the host immune response contribute to the maintenance of effector CD8 T cell responses versus CD8 T cell exhaustion during chronic infection. Specific MHC alleles and the degree of MHC heterogeneity are associated with enhanced CD8 T cell function and viral control during human chronic infection. However, it is currently unclear to what extent host genetics influences the establishment of chronic viral infection...
July 17, 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28713869/association-of-anisocytosis-with-markers-of-immune-activation-and-exhaustion-in-treated-hiv
#11
Sadeer G Al-Kindi, David A Zidar, Grace A McComsey, Chris T Longenecker
BACKGROUND: Treated HIV infection is associated with heightened inflammation which can contribute to increased risk of cardiovascular disease (CVD). We have previously shown that anisocytosis, as measured by red cell distribution width (RDW), is independently associated with prevalent CVD in people living with HIV (PLHIV). In this study, we sought to identify immune correlates of RDW in PLHIV receiving antiretroviral therapy. METHODS: We performed a cross-sectional and longitudinal analysis of 147 virally-suppressed PLHIV, who had LDL < 130 mg/dL and evidence of heightened inflammation, in a randomized trial of statin therapy...
2017: Pathogens & Immunity
https://www.readbyqxmd.com/read/28710491/ageing-and-latent-cmv-infection-impact-on-maturation-differentiation-and-exhaustion-profiles-of-t-cell-receptor-gammadelta-t-cells
#12
Martine J Kallemeijn, Anne Mieke H Boots, Michèle Y van der Klift, Elisabeth Brouwer, Wayel H Abdulahad, Jan A N Verhaar, Jacques J M van Dongen, Anton W Langerak
Ageing is a broad cellular process, largely affecting the immune system, especially T-lymphocytes. Additionally to immunosenescence alone, cytomegalovirus (CMV) infection is thought to have major impacts on T-cell subset composition and exhaustion. These impacts have been studied extensively in TCRαβ+ T-cells, with reduction in naive, increase in effector (memory) subsets and shifts in CD4/CD8-ratios, in conjunction with morbidity and mortality in elderly. Effects of both ageing and CMV on the TCRγδ+ T-cell compartment remain largely elusive...
July 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28708863/negative-modulation-of-suppressive-hiv-specific-regulatory-t-cells-by-il-2-adjuvanted-therapeutic-vaccine
#13
Vedran Brezar, Lylia Hani, Mathieu Surenaud, Audrey Hubert, Christine Lacabaratz, Jean-Daniel Lelièvre, Yves Levy, Nabila Seddiki
The potential benefit in using IL-2 in immunotherapy for cancer and autoimmunity has been linked to the modulation of immune responses, which partly relies on a direct effect on Tregs populations. Here, we revisited the role of IL-2 in HIV infection and investigated whether its use as an adjuvant with therapeutic vaccination, impacts on HIV-specific responses. Antiretroviral therapy treated-patients were randomized to receive 4 boosts of vaccination (ALVACHIV/Lipo-6T, weeks 0/4/8/12) followed by 3 cycles of IL-2 (weeks 16/24/32) before treatment interruption (TI) at week40...
July 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28707699/predict-disease-progression-from-t-cell-phenotypes-in-northern-pig-tailed-macaques-macaca-leonina-during-sivmac239-infection
#14
Ming-Xu Zhang, Hong-Yi Zheng, Jin Jiang, Jia-Hao Song, Min Chen, Yu Xiao, Xiao-Dong Lian, Tian-Zhang Song, Ren-Rong Tian, Wei Pang, Yong-Tang Zheng
Macaca leonina (northern pig-tailed macaques, NPMs) have variable disease progression during SIVmac239 infection. In the present study, we analyzed, for the first time, the correlations between T cell phenotypes and disease progression in NPMs during SIVmac239 infection. In comparison to normal progressors (NPs), slow progressors (SPs) had lower chronic T cell activation and exhaustion levels. In addition, SPs showed higher peripheral CD4+ T cell count, CD4/CD8 ratio and lower plasma viral load than NPs. CD4+ T cell count and CD4/CD8 ratio decreased more sharply in NPs than in SPs...
July 14, 2017: Immunology
https://www.readbyqxmd.com/read/28696685/modeling-sequence-dependent-peptide-fluctuations-in-immunologic-recognition
#15
Cory M Ayres, Timothy P Riley, Steven A Corcelli, Brian M Baker
In cellular immunity, T cells recognize peptide antigens bound and presented by major histocompatibility complex (MHC) proteins. The motions of peptides bound to MHC play a significant role in determining immunogenicity. However, existing approaches for investigating peptide/MHC motional dynamics are challenging or of low throughput, hindering the development of algorithms for predicting immunogenicity from large databases, such as those of tumor or genetically unstable viral genomes. We addressed this by performing exhaustive molecular dynamics simulations on a large structural database of peptides bound to the most commonly expressed human class I MHC protein, HLA-A*0201...
July 11, 2017: Journal of Chemical Information and Modeling
https://www.readbyqxmd.com/read/28692589/emerging-cancer-specific-therapeutic-aptamers
#16
Sorah Yoon, John J Rossi
PURPOSE OF REVIEW: We will describe recently discovered smart aptamers with tumor specificity, with an emphasis on targeted delivery of novel therapeutic molecules, cancer-specific biomarkers, and immunotherapy. RECENT FINDINGS: The development of cancer-specific aptamers has facilitated targeted delivery of potent therapeutic molecules to cancer cells without harming nontumoral cells. This specificity also makes it possible to discover novel cancer biomarkers. Furthermore, alternative immune-checkpoint blockade aptamers have been developed for combinational immunotherapy...
July 7, 2017: Current Opinion in Oncology
https://www.readbyqxmd.com/read/28692536/asymptomatic-anorectal-chlamydia-trachomatis-and-neisseria-gonorrhoeae-infections-are-associated-with-systemic-cd8-t-cell-activation
#17
Vinicius A Vieira, Vivian I Avelino-Silva, Natalia B Cerqueira, Dayane A Costa, Priscilla R Costa, Ricardo P Vasconcelos, Valdez R Madruga, Ronaldo Ismério Moreira, Brenda Hoagland, Valdiléa G Veloso, Beatriz Grinsztejn, Esper G Kallás
BACKGROUND: Oral pre-exposure prophylaxis (PrEP) has been established as a pivotal strategy in HIV prevention. However, bacterial sexually transmitted infections (STIs), such as Chlamydia trachomatis (CT) and Neisseria gonorrhoeae (NG), are also highly prevalent. Although the presence of STI-related mucosal lesions is a known risk factor for HIV acquisition, the potential increase in risk associated with asymptomatic STIs is not completely understood. Recent data demonstrated higher T cell activation is a risk factor for sexually acquired HIV-1 infection...
July 7, 2017: AIDS
https://www.readbyqxmd.com/read/28690843/the-role-of-pd-1-in-regulation-of-macrophage-apoptosis-and-its-subversion-by-leishmania-donovani
#18
Shalini Roy, Purnima Gupta, Shreyasi Palit, Moumita Basu, Anindita Ukil, Pijush K Das
Programmed death-1 receptor (PD-1) expressed in many immune cells is known to trigger T-cell exhaustion but the significance of macrophage-associated PD-1 in relevance to macrophage apoptosis is not known. This study is aimed to delineate whether PD-1 pathway has any role in eliciting macrophage apoptosis and, if so, then how the intra-macrophage parasite, Leishmania donovani modulates PD-1 pathway for protecting its niche. Resting macrophages when treated with H2O2 showed increased PD-1 expression and apoptosis, which was further enhanced on PD-1 agonist treatment...
May 2017: Clinical & Translational Immunology
https://www.readbyqxmd.com/read/28687491/site-specific-regulation-of-oral-mucosa-recruiting-cd8-t-cells-in-a-mouse-contact-allergy-model
#19
Worawalun Hirunwidchayarat, Emi Furusawa, Siwen Kang, Tatsukuni Ohno, Shunsuke Takeuchi, Sorasun Rungsiyanont, Miyuki Azuma
Contact allergy is a T cell-mediated, delayed-type hypersensitivity generated by contact exposure of an allergen to the skin and mucosal surface. The clinical manifestations of allergic responses between the skin and oral mucosa vary and the differences in immunopathology have not been clarified. We generated hapten-induced contact hypersensitivity (CH) of the buccal mucosa (BM) in parallel studies with ear skin (ES) CH, and observed several characteristic findings of BM CH. The BM challenge induced more rapid and more severe inflammation than the ES challenge, with abundant granulocyte and CD8(+) T cell infiltration...
July 4, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28681703/hybrid-approach-to-model-the-spatial-regulation-of-t-cell-responses
#20
Anass Bouchnita, Gennady Bocharov, Andreas Meyerhans, Vitaly Volpert
BACKGROUND: Moving from the molecular and cellular level to a multi-scale systems understanding of immune responses requires the development of novel approaches to integrate knowledge and data from different biological levels into mechanism-based integrative mathematical models. The aim of our study is to present a methodology for a hybrid modelling of immunological processes in their spatial context. METHODS: A two-level hybrid mathematical model of immune cell migration and interaction integrating cellular and organ levels of regulation for a 2D spatial consideration of idealized secondary lymphoid organs is developed...
June 21, 2017: BMC Immunology
keyword
keyword
18322
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"