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https://www.readbyqxmd.com/read/28067223/the-microbiota-maintain-homeostasis-of-liver-resident-%C3%AE-%C3%AE-t-17-cells-in-a-lipid-antigen-cd1d-dependent-manner
#1
Fenglei Li, Xiaolei Hao, Yongyan Chen, Li Bai, Xiang Gao, Zhexiong Lian, Haiming Wei, Rui Sun, Zhigang Tian
The microbiota control regional immunity using mechanisms such as inducing IL-17A-producing γδ T (γδT-17) cells in various tissues. However, little is known regarding hepatic γδT cells that are constantly stimulated by gut commensal microbes. Here we show hepatic γδT cells are liver-resident cells and predominant producers of IL-17A. The microbiota sustain hepatic γδT-17 cell homeostasis, including activation, survival and proliferation. The global commensal quantity affects the number of liver-resident γδT-17 cells; indeed, E...
January 9, 2017: Nature Communications
https://www.readbyqxmd.com/read/28035388/the-effect-of-inhaled-inactived-mycobacterium%C3%A2-phlei-as-a-treatment-for-asthma
#2
Moyu Ming, Chaoqian Li, Zhixi Luo, Shengqiu Lv, Qixiang Sun
Allergic asthma is a chronic airway disorder characterized by airway inflammation, mucus hypersecretion, and airway hyperresponsiveness (AHR). A murine model of asthma was used to examine the antiasthmatic effect of inhaled inactived Mycobacterium phlei (M. phlei). AHR, neutrophil levels, eosinophil levels and levels of interleukin (IL)‑17 and IL‑23 receptor (IL‑23R) were monitored. The results demonstrated that inactivated M. phlei alleviates the IL‑17+γδT cell‑mediated immune response and attenuates airway inflammation and airway hyperresponsiveness in the asthmatic murine lung, partially through inhibiting the expression of IL‑23R...
December 29, 2016: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28024851/deficiency-of-%C3%AE-%C3%AE-t-cells-protects-against-abdominal-aortic-aneurysms-by-regulating-phosphoinositide-3-kinase-akt-signaling
#3
Shuai Zhang, Xiaoyu Kan, Yulin Li, Ping Li, Congcong Zhang, Guang Li, Jie Du, Bin You
OBJECTIVE: It is known that T lymphocytes are activated in human abdominal aortic aneurysms (AAAs). γδT cells, as a subset of T cells, play a role in many inflammation-related diseases. However, whether γδT cells participate in the formation of AAA remains unknown. In this study, we explored the role of γδT cells in AAA lesions. METHODS AND RESULTS: Using the porcine pancreatic elastase-induced AAA model, we found that knock out of γδT cells significantly attenuated AAA formation...
December 23, 2016: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/27916033/-the-early-changes-of-respiratory-system-resistance-and-%C3%AE-%C3%AE-t-lymphocytes-infiltrated-in-graft-after-lung-transplantation-of-mouse
#4
Q R Chen, L F Wang, Y M Zhang, J N Xu, H Li, Y Z Ding
Objectives: To generate an orthotopic left lung transplantation model in mice, and to observe the early changes of respiratory system resistance and γδT lymphocytes infiltrated in grafts. Methods: The research time was from March 2014 to May 2015. The male C57BL/6 mice (n=35) and BALB/c mice (syngenic group, n=10) were randomly divided into five groups. Control group (n=5): wild C57BL/6 mice; syngenic transplant group (n=10): C57BL/6→C57BL/6; allogenic transplant group(allogenic group, n=10): BALB/c→C57BL/6; each transplant group was randomly divided into 3-day and 7-day subgroups (n=5)...
December 1, 2016: Zhonghua Wai Ke za Zhi [Chinese Journal of Surgery]
https://www.readbyqxmd.com/read/27909225/recovery-of-the-immune-system-after-exercise
#5
Jonathan M Peake, Oliver Neubauer, Neil P Walsh, Richard J Simpson
The notion that prolonged, intense exercise causes an 'open window' of immunodepression during recovery after exercise is well accepted. Repeated exercise bouts or intensified training without sufficient recovery may increase the risk of illness. However, except for salivary IgA, clear and consistent markers of this immunodepression remain elusive. Exercise increases circulating neutrophil and monocyte counts, and reduces circulating lymphocyte count during recovery. This lymphopenia results from preferential egress of lymphocyte subtypes with potent effector functions (e...
December 1, 2016: Journal of Applied Physiology
https://www.readbyqxmd.com/read/27900006/the-effect-of-activated-m%C3%AF-1-on-%C3%AE-%C3%AE-t-cell-mediated-killing-of-gastric-cancer-cells-in-vitro
#6
Wu Xia, Sun Han, Zhang Bao, Jia Fangyuan, Wu Ping
A clear understanding of the interactions between classically activated macrophages (Mϕ1) and γδT cells may improve current therapeutic approaches, including that of immunotherapy for treating certain types of cancer. The present study aimed to expand the current knowledge by showing the effect of culture supernatants of Mϕ1 on the proliferation, cell surface marker expression and tumor suppression effects of γδT cells, and by exploring the potential mechanisms involved. In vitro, Mϕ1 were cultured by GM-CSF and IFN-γ...
November 2016: Oncology Letters
https://www.readbyqxmd.com/read/27892456/il-12-protects-from-psoriasiform-skin-inflammation
#7
Paulina Kulig, Stephanie Musiol, Sandra Nicole Freiberger, Bettina Schreiner, Gabor Gyülveszi, Giancarlo Russo, Stanislav Pantelyushin, Kenji Kishihara, Francesca Alessandrini, Thomas Kündig, Federica Sallusto, Günther F L Hofbauer, Stefan Haak, Burkhard Becher
Neutralization of the common p40-subunit of IL-12/23 in psoriasis patients has led to a breakthrough in the management of moderate to severe disease. Aside from neutralizing IL-23, which is thought to be responsible for the curative effect, anti-p40 therapy also interferes with IL-12 signalling and type 1 immunity. Here we dissect the individual contribution of these two cytokines to the formation of psoriatic lesions and understand the effect of therapeutic co-targeting of IL-12 and IL-23 in psoriasis. Using a preclinical model for psoriatic plaque formation we show that IL-12, in contrast to IL-23, has a regulatory function by restraining the invasion of an IL-17-committed γδT (γδT17) cell subset...
November 28, 2016: Nature Communications
https://www.readbyqxmd.com/read/27890919/human-%C3%AE-%C3%AE-t-cell-subsets-and-their-involvement-in-tumor-immunity
#8
REVIEW
Dang Wu, Pin Wu, Fuming Qiu, Qichun Wei, Jian Huang
γδT cells are a conserved population of innate lymphocytes with diverse structural and functional heterogeneity that participate in various immune responses during tumor progression. γδT cells perform potent immunosurveillance by exerting direct cytotoxicity, strong cytokine production and indirect antitumor immune responses. However, certain γδT-cell subsets also contribute to tumor progression by facilitating cancer-related inflammation and immunosuppression. Here, we review recent observations regarding the antitumor and protumor roles of major structural and functional subsets of human γδT cells, describing how these subsets are activated and polarized, and how these events relate to subsequent function in tumor immunity...
November 28, 2016: Cellular & Molecular Immunology
https://www.readbyqxmd.com/read/27886550/v%C3%AE-1-%C3%AE-%C3%AE-t-early-cardiac-infiltrated-innate-population-dominantly-producing-il-4-protect-mice-against-cvb3-myocarditis-by-modulating-ifn%C3%AE-t-response
#9
Fangfang Wan, Kepeng Yan, Dan Xu, Qian Qian, Hui Liu, Min Li, Wei Xu
Viral myocarditis (VMC) is an inflammation of the myocardium closely associated with Coxsackievirus B3 (CVB3) infection. Vγ1(+)γδT cells, one of early cardiac infiltrated innate population, were reported to protect CVB3 myocarditis while the precise mechanism not fully addressed. To explore cytokine profiles and kinetics of Vγ1(+)γδT and mechanism of protection against VMC, flow cytometry was conducted on cardiac Vγ1 cells in C57BL/6 mice following CVB3 infection. The level of cardiac inflammation, transthoracic echocardiography and viral replication were evaluated after monoclonal antibody depletion of Vγ1γδT...
January 2017: Molecular Immunology
https://www.readbyqxmd.com/read/27855209/baicalin-attenuates-il-17-mediated-acetaminophen-induced-liver-injury-in-a-mouse-model
#10
Chia-Chih Liao, Yuan-Ji Day, Hung-Chen Lee, Jiin-Tarng Liou, An-Hsun Chou, Fu-Chao Liu
BACKGROUND: IL-17 has been shown to be involved in liver inflammatory disorders in both mice and humans. Baicalin (BA), a major compound extracted from traditional herb medicine (Scutellariae radix), has potent hepatoprotective properties. Previous study showed that BA inhibits IL-17-mediated lymphocyte adhesion and downregulates joint inflammation. The aim of this study is to investigate the role of IL-17 in the hepatoprotective effects of BA in an acetaminophen (APAP)-induced liver injury mouse model...
2016: PloS One
https://www.readbyqxmd.com/read/27798153/t-cell-independent-mechanisms-associated-with-neutrophil-extracellular-trap-formation-and-selective-autophagy-in-il-17a-mediated-epidermal-hyperplasia
#11
Erika Suzuki, Emanual Maverakis, Ritu Sarin, Laura Bouchareychas, Vijay K Kuchroo, Frank O Nestle, Iannis E Adamopoulos
IL-17A has been strongly associated with epidermal hyperplasia in many cutaneous disorders. However, because IL-17A is mainly produced by αβ and γδT cells in response to IL-23, the role of T cells and IL-23 has overshadowed any IL-17A-independent actions. In this article, we report that IL-17A gene transfer induces epidermal hyperplasia in Il23r(-/-)Rag1(-/-)- and Tcrδ-deficient mice, which can be prevented by neutrophil depletion. Moreover, adoptive transfer of CD11b(+)Gr-1(hi) cells, after IL-17A gene transfer, was sufficient to phenocopy the disease...
December 1, 2016: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/27796286/respective-il-17a-production-by-%C3%AE-%C3%AE-t-and-th17-cells-and-its-implication-in-host-defense-against-chlamydial-lung-infection
#12
Hong Bai, Xiaoling Gao, Lei Zhao, Ying Peng, Jie Yang, Sai Qiao, Huili Zhao, Shuhe Wang, YiJun Fan, Antony George Joyee, Zhi Yao, Xi Yang
The role of IL-17A is important in protection against lung infection with Chlamydiae, an obligate intracellular bacterial pathogen. In this study, we explored the producers of IL-17A in chlamydial lung infection and specifically tested the role of major IL-17A producers in protective immunity. We found that γδT cells and Th17 cells are the major producers of IL-17A at the early and later stages of chlamydial infection, respectively. Depletion of γδT cells in vivo at the early postinfection (p.i.) stage, when most γδT cells produce IL-17A, failed to alter Th1 responses and bacterial clearance...
October 31, 2016: Cellular & Molecular Immunology
https://www.readbyqxmd.com/read/27793912/minodronic-acid-in-combination-with-%C3%AE-%C3%AE-t-cells-induces-apoptosis-of-non-small-cell-lung-carcinoma-cell-lines
#13
Motoaki Yasukawa, Tsutomu Nakazawa, Takeshi Kawaguchi, Norikazu Kawai, Takahiro Tsujimura, Takashi Tojo, Shigeki Taniguchi
BACKGROUND/AIM: Non-small cell lung carcinoma (NSCLC) is one of the leading causes of cancer-related death worldwide. Recent studies showed that nitrogen-containing bisphosphonates (N-BPs) directly and indirectly prevent proliferation, induce apoptosis, and inhibit metastasis of various types of cancer cell. In order to investigate the effect of combining minodronic acid (MDA) with γδ T-cells, NSCLC cells were treated with five concentrations of MDA. MATERIALS AND METHODS: NSCLC cells were cultured with different concentrations of MDA alone or in combination with γδ T-cells for 24 h...
2016: Anticancer Research
https://www.readbyqxmd.com/read/27793666/characterization-of-%C3%AE-%C3%AE-regulatory-t-cells-from-peripheral-blood-in-patients-with-multiple-myeloma
#14
M A Yongyong, Huyi Lei, Jie Tan, Xuan Li, Xiuli Wu, Qifa Liu
γδ regulatory T cells are able to inhibit the activation and function of T cells involved in antigen-specific immune responses. This study aimed to investigate the potential role of γδ regulatory T cells in inhibiting anti-tumor immune responses in patients diagnosed as multiple myeloma (MM). We measured the levels of γδ T cells, the distribution and clonally amplified TCR Vγ and VδT cells in peripheral blood of healthy donors, patients recently diagnosed with MM, and MM patients in remission cohorts...
October 25, 2016: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/27790867/adjuvant-treatment-combining-cellular-immunotherapy-with-chemotherapy-improves-the-clinical-outcome-of-patients-with-stage-ii-iii-gastric-cancer
#15
Yizhuo Wang, Chang Wang, Huijie Xiao, Chao Niu, Haitao Wu, Haofan Jin, Cheng Yao, Hua He, Huimin Tian, Fujun Han, Dan Li, Wei Han, Jianting Xu, Jingtao Chen, Jiuwei Cui, Wei Li
Postsurgical relapse remains a common issue for resectable gastric cancer (GC). Here, we investigated the efficacy and safety of an adjuvant treatment combining chemotherapy with cellular immunotherapy (CIT) using autologous natural killer cells, γδT cells, and cytokine-induced killer cells in the treatment of stage II/III GC. A pilot prospective cohort study was conducted in 169 patients with stage II/III GC who had undergone gastrectomy with D2 lymph node dissection. Patients were assigned into two groups according to the patient choice of treatment, including chemotherapy alone (chemo) or chemotherapy combined with CIT (chemo/CIT)...
October 27, 2016: Cancer Medicine
https://www.readbyqxmd.com/read/27774091/microrna-7-deficiency-ameliorates-the-pathologies-of-acute-lung-injury-through-elevating-klf4
#16
Juanjuan Zhao, Chao Chen, Mengmeng Guo, Yijin Tao, PanPan Cui, Ya Zhou, Nalin Qin, Jing Zheng, Jidong Zhang, Lin Xu
Recent evidence showed that microRNA-7 (miR-7) played an important role in the pathologies of lung-related diseases. However, the potential role of miR-7 in acute lung injury (ALI) still remains poorly understood. Here, we assessed the effect of miR-7 deficiency on the pathology of ALI. We, first, found that the expression of miR-7 was upregulated in lung tissue in murine LPS-induced ALI model. Notably, we generated miR-7 knock down mice by using miRNA-Sponge technique and found that miR-7 deficiency could ameliorate the pathologies of lung as evidenced by accelerated body weight recovery, reduced level of bronchoalveolar lavage (BAL) proinflammatory cytokines and decreased number of BAL cells in ALI mice...
2016: Frontiers in Immunology
https://www.readbyqxmd.com/read/27763869/therapeutic-potential-of-zoledronate-activated-autologous-%C3%AE-%C3%AE-t-cells-in-atopic-dermatitis
#17
T Kamigaki, K Naitoh, S Goto
No abstract text is available yet for this article.
2016: Journal of Investigational Allergology & Clinical Immunology
https://www.readbyqxmd.com/read/27738345/friend-or-foe-the-dichotomous-impact-of-t-cells-on-neuro-de-re-generation-during-aging
#18
Brandon Coder, Weikan Wang, Liefeng Wang, Zhongdao Wu, Qichuan Zhuge, Dong-Ming Su
The interaction between T cells and the central nervous system (CNS) in homeostasis and injury has been recognized being both pathogenic (CD4+ T-helper 1 - Th1, Th17 and γδT) and ameliorative (Th2 and regulatory T cells - Tregs). However, in-depth studies aimed to elucidate the precise in the aged microenvironment and the dichotomous role of Tregs have just begun and many aspects remain unclear. This is due, not only to a mutual dependency and reciprocal causation of alterations and diseases between the nervous and T cell immune systems, but also to an inconsistent aging of the two systems, which dynamically changes with CNS injury/recovery and/or aging process...
October 11, 2016: Oncotarget
https://www.readbyqxmd.com/read/27729335/interleukin-23-secreted-by-activated-macrophages-drives-%C3%AE-%C3%AE-t-cell-production-of-interleukin-17-to-aggravate-secondary-injury-after-intracerebral-hemorrhage
#19
Qi Zhong, Kai Zhou, Qiao-Li Liang, Sen Lin, Yan-Chun Wang, Xiao-Yi Xiong, Zhao-You Meng, Ting Zhao, Wen-Yao Zhu, Yuan-Rui Yang, Mao-Fan Liao, Qiu-Wen Gong, Liang Liu, Ao Xiong, Junwei Hao, Jian Wang, Qing-Wu Yang
BACKGROUND: Neuroinflammation plays a key role in intracerebral hemorrhage (ICH)-induced secondary brain injury, but the specific roles of peripheral inflammatory cells such as macrophages and lymphocytes remain unknown. The purpose of this study was to explore the roles of macrophages, T lymphocytes, and the cytokines they secrete as potential targets for treating secondary brain injury after ICH. METHODS AND RESULTS: Our results showed that peripheral macrophages and T lymphocytes successively infiltrated the brain, with macrophage counts peaking 1 day after ICH and T-lymphocyte counts peaking after 4 days...
October 11, 2016: Journal of the American Heart Association
https://www.readbyqxmd.com/read/27720716/possible-pathogenic-engagement-of-soluble-semaphorin-4d-produced-by-%C3%AE-%C3%AE-t-cells-in-medication-related-osteonecrosis-of-the-jaw-mronj
#20
Alexandru Movila, Hani Mawardi, Kazuaki Nishimura, Tomomi Kiyama, Kenji Egashira, Jae-Young Kim, Alessandro Villa, Hajime Sasaki, Sook-Bin Woo, Toshihisa Kawai
Prior consensus held that medication-related osteonecrosis of the jaw (MRONJ) lesion was composed of necrotic bone; however, more recent studies have identified inflammatory infiltrates in the lesion. Herein, we report that remarkably elevated infiltrating γδT cells (90% of lymphocytes) express Semaphorin 4D (Sema4D) in human patient with MRONJ lesion, whereas γδT cells only account for 2-5% of lymphocytes in blood. Importantly, Sema4D is implicated in the pathogenesis of T cell-mediated inflammatory diseases, such as rheumatoid arthritis and multiple sclerosis...
November 4, 2016: Biochemical and Biophysical Research Communications
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