keyword
MENU ▼
Read by QxMD icon Read
search

CD8 tolerance

keyword
https://www.readbyqxmd.com/read/28916112/a-novel-mimovirus-encoding-chga10-19-peptide-with-pd-l1-induces-t-cell-tolerance-and-ameliorates-the-severity-of-diabetes
#1
Hong Sun, Xiaoguang Han, Xiuhui Yan, Jingli Xu, Qiujing Huang, Fanqing Meng, Hongjin Zhang, Shufa Li
Related studies demonstrate that type 1 diabetes (T1D) is caused by β-cell antigen specific autoreactive CD8+ T cells. ChgA has recently been identified as the autoantigen in NOD mice and T1D patients. Therefore, attenuating the activation of ChgA specific CD8+ T cells might be a promising target for T1D therapy. The negative co-stimulatory PD-L1 inhibits T cell mediated alloimmunity and induces tolerance. In this experiment, a novel mimovirus encoding ChgA10-19 peptide with PD-L1 was constructed. The NOD...
September 7, 2017: Cellular Immunology
https://www.readbyqxmd.com/read/28904063/anti-jagged-immunotherapy-inhibits-mdscs-and-overcomes-tumor-induced-tolerance
#2
Rosa A Sierra, Jimena Trillo-Tinoco, Eslam Mohamed, Lolie Yu, Bhagelu R Achyut, Ali Arbab, Jennifer W Bradford, Barbara A Osborne, Lucio Miele, Paulo C Rodriguez
Myeloid-derived suppressor cells (MDSCs) are a major obstacle to promising forms of cancer immunotherapy, but tools to broadly limit their immunoregulatory effects remain lacking. In this study, we assessed the therapeutic effect of the humanized anti-Jagged1/2 blocking antibody CTX014 on MDSC-mediated T cell suppression in tumor-bearing mice. CTX014 decreased tumor growth, impacted the accumulation and tolerogenic activity of MDSCs in tumors, and inhibited the expression of immunosuppressive factors arginase I and iNOS...
September 13, 2017: Cancer Research
https://www.readbyqxmd.com/read/28900678/socs1-regulator-of-t-cells-in-autoimmunity-and-cancer
#3
Subburaj Ilangumaran, Diwakar Bobbala, Sheela Ramanathan
SOCS1 is a negative feedback regulator of cytokine and growth factor receptor signaling, and plays an indispensable role in attenuating interferon gamma signaling. Studies on SOCS1-deficient mice have established a crucial role for SOCS1 in regulating CD8(+) T cell homeostasis. In the thymus, SOCS1 prevents thymocytes that had failed positive selection from surviving and expanding, ensures negative selection and prevents inappropriate developmental skewing toward the CD8 lineage. In the periphery, SOCS1 not only controls production of T cell stimulatory cytokines but also attenuates the sensitivity of CD8(+) T cells to synergistic cytokine stimulation and antigen non-specific activation...
September 13, 2017: Current Topics in Microbiology and Immunology
https://www.readbyqxmd.com/read/28894277/host-expression-of-the-cd8-treg-nk-cell-restriction-element-qa-1-is-dispensable-for-transplant-tolerance
#4
Blair T Stocks, Christopher S Wilson, Andrew F Marshall, Lauren A Brewer, Daniel J Moore
Disruption of the non-classical Major Histocompatibility Complex (MHC) Ib molecule Qa-1 impairs CD8 Treg and natural killer (NK) cell function and promotes a lupus-like autoimmune disease. This immune perturbation would be expected to enhance anti-transplant responses and impair tolerance induction, but the effect of Qa-1 deficiency on the transplant response has not been previously reported. Qa-1 deficiency enhanced CD4 TFH and germinal center (GC) B cell numbers in naïve mice and hastened islet allograft rejection...
September 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28894272/t-cell-tolerance-and-exhaustion-in-the-clearance-of-echinococcus-multilocularis-role-of-inoculum-size-in-a-quantitative-hepatic-experimental-model
#5
Chuanshan Zhang, Yingmei Shao, Shuting Yang, Xiaojuan Bi, Liang Li, Hui Wang, Ning Yang, Zhide Li, Cheng Sun, Liang Li, Guodong Lü, Tuerganaili Aji, Dominique A Vuitton, Renyong Lin, Hao Wen
The local immune mechanisms responsible for either self-healing or sustained chronic infection are not clear, in the development of E. multilocularis larvae. Here, we developed a suitable experimental model that mimics naturally infected livers, according to the parasite load. We demonstrated that local cellular immunity and fibrogenesis are actually protective and fully able to limit metacestode growth in the liver of low or medium dose-infected mice (LDG or MDG), or even to clear it, while impairment of cellular immunity is followed by a more rapid and severe course of the disease in high dose-infected mice (HDG)...
September 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28890294/analysis-of-non-small-cell-lung-cancer-microenvironment-indicates-preponderance-of-t-cell-exhaustion-marker-expression
#6
Hui Zhou, Tingwei Liu, Zanfeng Wang
Lung cancer metastasis causes 70% of an estimated 1.4 million deaths per annum. The major shortcoming in lung cancer is the tendency to have inherent or develop acquired resistance to chemotherapy. It is now evolving that such resistance might develop due to differential contribution and interaction with tumor microenvironment, stromal cells, and the extracellular matrix. The objective of the current study was to define the lung cancer tumor microenvironment. We have identified multiple tumor-infiltrating T lymphocyte subsets in patients with lung cancer, which were independent of disease stage...
September 7, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/28887632/multipeptide-coupled-nanoparticles-induce-tolerance-in-humanised-hla-transgenic-mice-and-inhibit-diabetogenic-cd8-t-cell-responses-in-type-1-diabetes
#7
Xinyu Xu, Lingling Bian, Min Shen, Xin Li, Jing Zhu, Shuang Chen, Lei Xiao, Qingqing Zhang, Heng Chen, Kuanfeng Xu, Tao Yang
AIMS/HYPOTHESIS: Induction of antigen-specific immunological tolerance may provide an attractive immunotherapy in the NOD mouse model but the conditions that lead to the successful translation to human type 1 diabetes are limited. In this study, we covalently linked 500 nm carboxylated polystyrene beads (PSB) with a mixture of immunodominant HLA-A*02:01-restricted epitopes (peptides-PSB) that may have high clinical relevance in humans as they promote immune tolerance; we then investigated the effect of the nanoparticle-peptide complexes on T cell tolerance...
September 8, 2017: Diabetologia
https://www.readbyqxmd.com/read/28886381/oncolytic-virotherapy-promotes-intratumoral-t-cell-infiltration-and-improves-anti-pd-1-immunotherapy
#8
Antoni Ribas, Reinhard Dummer, Igor Puzanov, Ari VanderWalde, Robert H I Andtbacka, Olivier Michielin, Anthony J Olszanski, Josep Malvehy, Jonathan Cebon, Eugenio Fernandez, John M Kirkwood, Thomas F Gajewski, Lisa Chen, Kevin S Gorski, Abraham A Anderson, Scott J Diede, Michael E Lassman, Jennifer Gansert, F Stephen Hodi, Georgina V Long
Here we report a phase 1b clinical trial testing the impact of oncolytic virotherapy with talimogene laherparepvec on cytotoxic T cell infiltration and therapeutic efficacy of the anti-PD-1 antibody pembrolizumab. Twenty-one patients with advanced melanoma were treated with talimogene laherparepvec followed by combination therapy with pembrolizumab. Therapy was generally well tolerated, with fatigue, fevers, and chills as the most common adverse events. No dose-limiting toxicities occurred. Confirmed objective response rate was 62%, with a complete response rate of 33% per immune-related response criteria...
September 7, 2017: Cell
https://www.readbyqxmd.com/read/28877966/t-cell-mediation-of-pregnancy-analgesia-affecting-chronic-pain-in-mice
#9
Sarah F Rosen, Boram Ham, Shannon Drouin, Nadia Boachie, Anne-Julie Chabot-Dore, Jean-Sebastien Austin, Luda Diatchenko, Jeffrey S Mogil
It has been consistently reported that many female chronic pain sufferers have an attenuation of symptoms during pregnancy. Rats display increased pain tolerance during pregnancy, due to an increase in opioid receptors in the spinal cord. These past studies did not consider the role of non-neuronal cells, now appreciated to play an important role in chronic pain processing. Using an inflammatory (complete Freund's adjuvant) or neuropathic (spared nerve injury) model of persistent pain, we observe that young adult female mice in early pregnancy switch from a micgrolia-independent to a microglia-dependent pain hypersensitivity mechanism...
September 6, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28871258/distinctive-surface-glycosylation-patterns-associated-with-mouse-and-human-cd4-regulatory-t-cells-and-their-suppressive-function
#10
Joana Cabral, Shirley A Hanley, Jared Q Gerlach, Neil O'Leary, Stephen Cunningham, Thomas Ritter, Rhodri Ceredig, Lokesh Joshi, Matthew D Griffin
Regulatory T-cells (Treg) are essential for maintaining immune homeostasis and tolerance. Surface glycosylation is ubiquitous on mammalian cells and regulates diverse biological processes. While it is currently well accepted that surface glycan expression influences multiple aspects of T-cell function, little is known about the relevance of glycosylation to Treg biology. This study aimed to profile the surface glycosylation characteristics of Treg in various lymphoid compartments of mouse and in human peripheral blood with comparison to non-regulatory, conventional CD4(+) T-cells (Tconv)...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28870600/interleukin-10-enhanced-cd8-t-cell-activity-and-reduced-cd8-t-cell-apoptosis-in-patients-with-diffuse-large-b-cell-lymphoma
#11
Huiying Qiu, Xiaoxia Hu, Lei Gao, Li Chen, Jie Chen, Joanna Yuan, Chongmei Huang, Xiaoqian Xu, Jianmin Yang
The pleiotropic cytokine interleukin (IL)-10 is best characterized by its ability to downregulate inflammation and promote peripheral tolerance. On the other hand, IL-10 was also found to maintain the effector response of CD8(+) T cells and promote the expansion of tumor-resident CD8(+) T cells. In diffuse large B cell lymphoma (DLBCL), the role of IL-10 has been characterized in tumor cells but not in CD8(+) T cells. We found that CD8(+) T cells in DLBCL presented robust interferon (IFN)-γ expression early during TCR-activation but could not maintain this response later on, which was characterized by significantly lower CD8(+) T cell degranulation and higher apoptosis...
September 1, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/28869918/circulating-cd4-pd-1-and-cd8-pd-1-t-cells-are-profoundly-decreased-at-the-onset-of-fulminant-type-1-diabetes-and-are-restored-by-treatment-contrasting-with-cd4-cd25-foxp3-regulatory-t-cells
#12
Toshie Iijima, Kanako Kato, Teruo Jojima, Takanori Tomotsune, Maiko Fukushima, Kunihiro Suzuki, Yoshimasa Aso
Programed cell death protein-1 (PD-1) is an inhibitory receptor expressed by T cells that downregulates the activation and proliferation of these cells to maintain peripheral self-tolerance. Recent studies reported some cases of new-onset type 1 diabetes (T1D) under anti-PD1 or PDL-1 antibodies. We demonstrated that circulating both CD4+PD-1+ and CD8+PD-1+ T cells were profoundly reduced at the onset of fulminant T1D and were restored by treatment in two patients with fulminant T1D.
July 31, 2017: Diabetes Research and Clinical Practice
https://www.readbyqxmd.com/read/28868001/efficacy-and-tolerability-of-polyphenon-e-in-difficult-to-treat-multiple-genital-warts-in-an-hiv-positive-male-subject
#13
Mauro Grandolfo, Massimo Milani
A 55-year-old man, nonsmoker, with a HIV-positive history came to our attention in February 2017. He was on treatment with Stribild(TM), 1 capsule daily (150 mg elvitegravir, 150 mg cobicistat, 200 mg emtricitabine, and 245 mg tenofovir disoproxil). The CD4+/CD8+ cellular count was 326/µL (normal values: 404-1,612); the CD3+/CD8+ cellular count was 819/µL (normal values: 220-1,219). The CD4/CD8 ratio was 0.40 (normal value: >1). Several typical genital wart lesions were present at the penis shaft and at the level of the neck and the corona of glans...
May 2017: Case Reports in Dermatology
https://www.readbyqxmd.com/read/28866802/effects-of-a-high-fat-diet-on-adipose-tissue-cd8-t-cells-in-young-vs-adult-mice
#14
Lijun Dong, Yao Zhang, Li Yang, Guoyan Liu, Jianping Ye, Hui Wang
T cells are involved in chronic inflammation of adipose tissue in obese conditions. However, the impact of age on the adipose T cells remains unknown. In this study, we investigated T cells in the white adipose tissue of young and adult mice. Obesity was induced in the mice using a high-fat diet (HFD) for 14 weeks. The young mice were fed an HFD at 3 weeks old, and adult mice were fed the HFD at 12 weeks old. Relative to adult mice, the young mice gained less fat and exhibited better glucose tolerance. Their adipose tissue contained more CD8+ T cells and higher levels of pro-inflammatory cytokines...
September 2, 2017: Inflammation
https://www.readbyqxmd.com/read/28864471/peripheral-deletion-of-cd8-t-cells-requires-p38-mapk-in-cross-presenting-dendritic-cells
#15
Trevor Smith, Xiaotian Lin, Marielle Mello, Kristi Marquardt, Jocelyn Cheung, Binfeng Lu, Linda A Sherman, Grégory Verdeil
Peripheral tolerance mechanisms exist to prevent autoimmune destruction by self-reactive T cells that escape thymic deletion. Dominant tolerance imposed by CD4(+)Foxp3(+) T regulatory cells can actively control autoaggressive T cell responses. Tolerance mechanisms that act endogenous to the T cell also exist. These mechanisms include T cell inactivation (anergy) and deletion. A major difference between anergic T cells and T cells undergoing peripheral deletion is the capacity of the latter to still signal through MAPKs upon TCR stimulation, suggesting these signals may be required for T deletion...
September 1, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28861951/encapsulation-of-hydrophilic-and-hydrophobic-peptides-into-hollow-mesoporous-silica-nanoparticles-for-enhancement-of-antitumor-immune-response
#16
Jun Xie, Chaohua Yang, Qianqian Liu, Jun Li, Ruijing Liang, Chen Shen, Yi Zhang, Ke Wang, Liping Liu, Khurram Shezad, Martin Sullivan, Yong Xu, Guanxin Shen, Juan Tao, Jintao Zhu, Zhiping Zhang
Codelivery of combinational antigenic peptides and adjuvant to antigen presenting cells is expected to amplify tumor specific T lymphocytes immune responses while minimizing the possibility of tumor escaping and reducing immune tolerance to single antigenic peptide. However, the varied hydrophobicities of these multivariant derived short antigenic peptides limit their codelivery efficiency in conventional delivery systems. Here, a facile yet effective route is presented to generate monodisperse and stable hollow mesoporous silica nanoparticles (HMSNs) for codelivering of HGP10025-33 and TRP2180-188 , two melanoma-derived peptides with varied hydrophobicities...
September 1, 2017: Small
https://www.readbyqxmd.com/read/28855989/t-cell-immunoglobulin-mucin-3-expression-in-invasive-ductal-breast-carcinoma-clinicopathological-correlations-and-association-with-tumor-infiltration-by-cytotoxic-lymphocytes
#17
Huan Zhang, Rong Xiang, Bin Wu, Jinlong Li, Guilin Luo
As a negative regulatory molecule, T-cell immunoglobulin and mucin domain-3 (Tim-3) is closely associated with tumor immunological tolerance. The aim of this study was to investigate Tim-3 expression in invasive ductal breast cancer (IDC), its effect on clinicopathological parameters and its association with cytotoxic lymphocyte infiltration. Tim-3 protein expression was measured in 150 paraffin-embedded IDC specimens and 100 paired normal breast tissue specimens by immunohistochemistry. It was demonstrated that the infiltration of the tumor by CD8(+) T cells was significantly higher compared with that of normal tissue, and the Tim-3 expression on CD8(+) T cells was higher in IDC tissue compared with that in normal tissue; the differences were statistically significant (both P-values=0...
October 2017: Molecular and Clinical Oncology
https://www.readbyqxmd.com/read/28844471/remodeling-t-cell-compartments-during-anti-cd3-immunotherapy-of-type-1-diabetes
#18
S Alice Long, Jerill Thorpe, Kevan C Herold, Mario Ehlers, Srinath Sanda, Noha Lim, Peter S Linsley, Gerald T Nepom, Kristina M Harris
The immunological mechanism(s) of action whereby teplizumab preserves C-peptide levels in the progression of patients with recent onset type 1 diabetes (T1D) is still not well understood. In the present study, we evaluated the kinetics of T cell modulation in peripheral blood following two 14-day courses of teplizumab therapy one year apart in recent onset T1D participants in the AbATE clinical trial. Transient rises in PD-1+Foxp3+ Treg and potentially anergic (CD57-KLRG1-PD-1+) cells in the circulating CD4 T cell compartment were paralleled by more profound increases in circulating CD8 T cells with traits of exhaustion (CD57-KLRG1+PD-1+, TIGIT+KLRG1+, and persistent down-modulation of CD127)...
August 18, 2017: Cellular Immunology
https://www.readbyqxmd.com/read/28810561/cytotoxic-t-lymphocytes-promote-cytarabine-induced-acute-myeloid-leukemia-cell-apoptosis-via-inhibiting-bcl-2-expression
#19
Rui Deng, Fang-Yi Fan, Hai Yi, Li Fu, Yan Zeng, Yi Wang, Xiao-Juan Miao, Yan-Rong Shuai, Guang-Cui He, Yi Su
Acute myeloid leukemia (AML) remains difficult to cure due to its drug tolerance and refractoriness. Immunotherapy is a growing area of cancer research, which has been applied for the treatment of numerous types of cancer, including leukemia. The present study generated AML cell-specific cytotoxic T lymphocytes (CTLs) in vitro and investigated the effect of combining CTL treatment with one of the most commonly used drugs for the treatment of hematological malignancies, cytarabine, on AML cell apoptosis. Firstly, it was observed that monocyte-depleted peripheral blood lymphocytes from healthy donors could be used to generate large numbers of CD3(+)CD8(+) CTLs through immune stimulation...
August 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28798332/absence-of-grail-promotes-cd8-t-cell-anti-tumour-activity
#20
Cara Haymaker, Yi Yang, Junmei Wang, Qiang Zou, Anupama Sahoo, Andrei Alekseev, Divyendu Singh, Krit Ritthipichai, Yared Hailemichael, Oanh N Hoang, Hong Qin, Kimberly S Schluns, Tiejun Wang, Willem W Overwijk, Shao-Cong Sun, Chantale Bernatchez, Larry W Kwak, Sattva S Neelapu, Roza Nurieva
T-cell tolerance is a major obstacle to successful cancer immunotherapy; thus, developing strategies to break immune tolerance is a high priority. Here we show that expression of the E3 ubiquitin ligase Grail is upregulated in CD8(+) T cells that have infiltrated into transplanted lymphoma tumours, and Grail deficiency confers long-term tumour control. Importantly, therapeutic transfer of Grail-deficient CD8(+) T cells is sufficient to repress established tumours. Mechanistically, loss of Grail enhances anti-tumour reactivity and functionality of CD8(+) T cells...
August 10, 2017: Nature Communications
keyword
keyword
38327
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"