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tumor induced immune suppression

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https://www.readbyqxmd.com/read/29677563/polysaccharide-of-hericium-erinaceus-attenuates-colitis-in-c57bl-6-mice-via-regulation-of-oxidative-stress-inflammation-related-signaling-pathways-and-modulating-the-composition-of-the-gut-microbiota
#1
Yilin Ren, Yan Geng, Yan Du, Wang Li, Zhen-Ming Lu, Hong-Yu Xu, Guo-Hua Xu, Jin-Song Shi, Zheng-Hong Xu
Inflammatory bowel disease (IBD) is a disease caused by a dysregulated immune with unknown etiology. Hericium erinaceus (H. erinaceus) is a Chinese medicinal fungus, with the effect of prevention and treatment of gastrointestinal disorders. In this study, we have tested the anti-inflammatory effect of polysaccharide of H. erinaceus (HECP, Mw: 86.67 kDa) in the model of dextran sulfate sodium (DSS)-induced colitis in C57BL/6 mice. Our data indicated that HECP could improve clinical symptoms and down-regulate key markers of oxidative stresses, including nitric oxide (NO), malondialdehyde (MDA), total superoxide dismutase (T-SOD), and myeloperoxidase (MPO)...
March 16, 2018: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/29676621/interleukin-17a-in-the-pathogenesis-of-lung-adenocarcinoma
#2
Zhen Lin, Christian Nguyen, Beibei Xu, Erik K Flemington, Gilbert F Morris
RATIONALE: Evidence has shown that inhaled lung carcinogens, such as tobacco smoke, silica, or asbestos, induce a T-helper cell type 17 inflammatory environment. Interleukin-17A (commonly and hereafter called IL-17) is the signature cytokine of T-helper cell type 17 inflammation. We have shown previously that IL-17 overexpression promotes growth of lung adenocarcinoma in transgenic mouse models. Our additional findings suggest that IL-17 suppresses the function of the p53 tumor suppressor protein in a mutant K-Ras-expressing lung tumor cell line...
April 2018: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/29675979/senescent-cells-re-engineered-to-express-spd-1-for-inhibiting-pd-1-pd-l1-as-a-vaccination-approach-against-breast-cancer
#3
Zehong Chen, Kang Hu, Lieting Feng, Ruxiong Su, Nan Lai, Zike Yang, Shijun Kang
Various types of vaccines have been proposed as approaches for prevention or delay of the onset of cancer by boosting the endogenous immune system. We previously developed a senescent-cell-based vaccine, induced by radiation and veliparib, as a preventive and therapeutic tool against triple-negative breast cancer. However, the PD-1/PD-L1 pathway was found to play an important role in vaccine failure. Hence, we further developed sPD1-expressing senescent cells to overcome PD-L1/PD1-mediated immune suppression while vaccinating to promote dendritic cells (DCs) maturity, thereby amplifying T cell activation...
April 20, 2018: Cancer Science
https://www.readbyqxmd.com/read/29675023/increased-plasma-levels-of-danger-associated-molecular-patterns-are-associated-with-immune-suppression-and-postoperative-infections-in-patients-undergoing-cytoreductive-surgery-and-hyperthermic-intraperitoneal-chemotherapy
#4
Guus P Leijte, Hettie Custers, Jelle Gerretsen, Amon Heijne, Johannes Roth, Thomas Vogl, Gert J Scheffer, Peter Pickkers, Matthijs Kox
Introduction: Danger-associated molecular patterns (DAMPs) can elicit immune responses and may subsequently induce an immune-suppressed state. Previous work showed that increased plasma levels of DAMPs are associated with immune suppression and increased susceptibility toward infections in trauma patients. Like trauma, major surgical procedures, such as cytoreductive surgery (CRS) combined with hyperthermic intraperitoneal chemotherapy (HIPEC), are also thought to cause profound DAMP release...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29674728/physiological-function-of-phospholipase-d2-in-anti-tumor-immunity-regulation-of-cd8-t-lymphocyte-proliferation
#5
Van Ngo Thai Bich, Tsunaki Hongu, Yuki Miura, Naohiro Katagiri, Norihiko Ohbayashi, Yumi Yamashita-Kanemaru, Akira Shibuya, Yuji Funakoshi, Yasunori Kanaho
Two major phospholipase D (PLD) isozymes in mammals, PLD1 and PLD2, hydrolyze the membrane phospholipid phosphatidylcholine to choline and the lipid messenger phosphatidic acid. Although their roles in cancer cells have been well studied, their functions in tumor microenvironment have not yet been clarified. Here, we demonstrate that PLD2 in cytotoxic CD8+ T cells plays a crucial role in anti-tumor immunity by regulating their cell proliferation. We found that growth of tumors formed by subcutaneously transplanted cancer cells is enhanced in Pld2-knockout mice...
April 19, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29670099/nuclear-receptor-nr2f6-inhibition-potentiates-responses-to-pd-l1-pd-1-cancer-immune-checkpoint-blockade
#6
Victoria Klepsch, Natascha Hermann-Kleiter, Patricia Do-Dinh, Bojana Jakic, Anne Offermann, Mirjana Efremova, Sieghart Sopper, Dietmar Rieder, Anne Krogsdam, Gabriele Gamerith, Sven Perner, Alexandar Tzankov, Zlatko Trajanoski, Dominik Wolf, Gottfried Baier
Analyzing mouse tumor models in vivo, human T cells ex vivo, and human lung cancer samples, we provide direct evidence that NR2F6 acts as an immune checkpoint. Genetic ablation of Nr2f6, particularly in combination with established cancer immune checkpoint blockade, efficiently delays tumor progression and improves survival in experimental mouse models. The target genes deregulated in intratumoral T lymphocytes upon genetic ablation of Nr2f6 alone or together with PD-L1 blockade reveal multiple advantageous transcriptional alterations...
April 18, 2018: Nature Communications
https://www.readbyqxmd.com/read/29669930/tsc2-deficient-tumors-have-evidence-of-t-cell-exhaustion-and-respond-to-anti-pd-1-anti-ctla-4-immunotherapy
#7
Heng-Jia Liu, Patrick H Lizotte, Heng Du, Maria C Speranza, Hilaire C Lam, Spencer Vaughan, Nicola Alesi, Kwok-Kin Wong, Gordon J Freeman, Arlene H Sharpe, Elizabeth P Henske
Tuberous sclerosis complex (TSC) is an incurable multisystem disease characterized by mTORC1-hyperactive tumors. TSC1/2 mutations also occur in other neoplastic disorders, including lymphangioleiomyomatosis (LAM) and bladder cancer. Whether TSC-associated tumors will respond to immunotherapy is unknown. We report here that the programmed death 1 coinhibitory receptor (PD-1) is upregulated on T cells in renal angiomyolipomas (AML) and pulmonary lymphangioleiomyomatosis (LAM). In C57BL/6J mice injected with syngeneic TSC2-deficient cells, anti-PD-1 alone decreased 105K tumor growth by 67% (P < 0...
April 19, 2018: JCI Insight
https://www.readbyqxmd.com/read/29669006/gene-signature-based-approach-identified-mek1-2-as-a-potential-target-associated-with-relapse-after-anti-tnf%C3%AE-treatment-for-crohn-s-disease
#8
Kanae Gamo, Yuumi Okuzono, Masato Yabuki, Takashi Ochi, Kyoko Sugimura, Yosuke Sato, Masaki Sagara, Hiroki Hayashi, Yoshimasa Ishimura, Yutaka Nishimoto, Yusuke Murakawa, Zenyu Shiokawa, Masayuki Gotoh, Takahiro Miyazaki, Yukihiko Ebisuno
Background: Anti-tumor necrosis factor alpha (anti-TNFα) therapy has become the mainstay of therapy for Crohn's disease (CD). However, post-therapy, the recurrence rate is still high. The aim of this study was to dissect the molecular mechanism for recurrence of CD treated with anti-TNFα therapy and investigate novel therapeutic options that could induce complete remission. Methods: We re-analyzed publicly available mucosal gene expression data from CD patients pre- and post-infliximab therapy to extract the transcriptional differences between responders and healthy controls...
April 13, 2018: Inflammatory Bowel Diseases
https://www.readbyqxmd.com/read/29668624/effect-of-%C3%AF-3-polyunsaturated-fatty-acid-supplemented-parenteral-nutrition-on-inflammatory-and-immune-function-in-postoperative-patients-with-gastrointestinal-malignancy-a-meta-analysis-of-randomized-control-trials-in-china
#9
Yajie Zhao, Chengfeng Wang
BACKGROUND: There are no consensus regarding the efficacy of omega-3polyunsaturated fatty acids (PUFAs) on inflammatory and immune function in postoperative patients with gastrointestinal malignancy. METHODS: The literatures published randomized control trials (RCT) were searched in PubMed, Embase, Scopus, Cochrane Library, CNKI, Weipu, and Wanfang Databases. The immune efficacy outcomes of ω-3 polyunsaturated fatty acid-supplemented parenteral nutrition in patients with gastrointestinal malignancy were compared...
April 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29667667/%C3%AE-cyperone-inhibits-lps-induced-inflammation-in-bv-2-cells-through-activation-of-akt-nrf2-ho-1-and-suppression-of-the-nf-%C3%AE%C2%BAb-pathway
#10
Bingxu Huang, Dewei He, Guangxin Chen, Xin Ran, Wenjin Guo, Xingchi Kan, Wei Wang, Dianfeng Liu, Shoupeng Fu, Juxiong Liu
Accumulating evidence has shown that activated microglia cause inflammatory immune response, which could lead to neurodegenerative diseases such as Parkinson's disease and Alzheimer's disease. α-Cyperone, one of the main ingredients of Cyperus rotundus oil, has been reported to possess anti-inflammatory activity in activated macrophages. In this study, we found that α-cyperone markedly decreased the production of tumor necrosis factor-α (TNF-α), interleukin-6 (IL-6) and interleukin-1β (IL-1β) in LPS-induced BV-2 cells...
April 18, 2018: Food & Function
https://www.readbyqxmd.com/read/29663929/generation-of-a-graft-versus-anticancer-immune-response-through-skin-allograft-with-tumor
#11
Yuan Fang, Sufang Zhou, Baoshi Zheng, Wenlin Gong, Yong Huang, Zhenghua Zhang, Chaofan Zhou, Huiling Wang, Zhimei Huang, Liping Zhong, Yongxiang Zhao
Effector memory T cells (TEM) are a subset of memory T cells which play an important role in stimulation of adaptive immunity. Although they are associated with multiple immune responses, the antitumor effect of TEM is not clearly understood. In this research, generation of anti-tumor TEM was induced through skin allografts in C57BL/6 mice with B16 melanoma. We observed that the growth of tumor tissues in C57BL/6 mice treated with allografts was interrupted. Furthermore, the survival time for the treated mice was prolonged along with increased serum levels for CXCL9, CXCL10 and INF-γ...
March 1, 2018: Journal of Biomedical Nanotechnology
https://www.readbyqxmd.com/read/29662489/immunological-approaches-towards-cancer-and-inflammation-a-cross-talk
#12
REVIEW
Xinglong Qu, Ying Tang, Shucheng Hua
The inflammation is the protective response of the body against various harmful stimuli; however, the aberrant and inappropriate activation tends to become harmful. The acute inflammatory response tends to resolved once the offending agent is subside but this acute response becomes chronic in nature when the body is unable to successfully neutralized the noxious stimuli. This chronic inflammatory microenvironment is associated with the release of various pro-inflammatory and oncogenic mediators such as nitric oxide (NO), cytokines [IL-1β, IL-2, interleukin-6 (IL-6), and tumor necrosis factor-α (TNF-α)], growth factor, and chemokines...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29658610/overexpression-of-il-9-induced-by-stat3-phosphorylation-is-mediated-by-mir-155-and-mir-21-in-chronic-lymphocytic-leukemia
#13
Na Chen, Lili Feng, Huiting Qu, Kang Lu, Peipei Li, Xiao Lv, Xin Wang
Interleukin‑9 (IL‑9) can function as both a positive and negative regulator of immune response, however the role of IL‑9 in tumor immunity is poorly understood. Chronic lymphocytic leukemia (CLL) is the most common chronic lympho‑proliferative disorder. Twenty CLL patients from 2010 to 2011 were recruited in the study. Expression and phosphorylation of transcription factor STAT3 and differential microRNAs (miRs) in peripheral blood mononuclear cells (PBMCs) from CLL patient samples were analyzed...
April 12, 2018: Oncology Reports
https://www.readbyqxmd.com/read/29656749/tumor-associated-macrophages-support-the-growth-of-fgf9-induced-lung-adenocarcinoma-by-multiple-mechanisms
#14
Ahmed E Hegab, Mari Ozaki, Shizuko Kagawa, Junko Hamamoto, Hiroyuki Yasuda, Katsuhiko Naoki, Kenzo Soejima, Yongjun Yin, Tomonari Kinoshita, Tomonori Yaguchi, Yutaka Kawakami, David M Ornitz, Tomoko Betsuyaku
OBJECTIVES: Tumor-associated macrophages (TAMs) are known to promote tumorigenesis but the mechanism(s) remain elusive. We have developed a mouse model of lung cancer that is initiated through an inducible overexpression of fibroblast growth factor 9 (FGF9) in type-2 pneumocytes. Expression of FGF9 in adult lungs resulted in a rapid development of multiple adenocarcinoma-like tumor nodules, and is associated with an intense immunological reaction. The purpose of this study is to characterize the immune response to the FGF9-induced lung adenocarcinoma and to determine the contribution of TAMs to growth and survival of these tumors...
May 2018: Lung Cancer: Journal of the International Association for the Study of Lung Cancer
https://www.readbyqxmd.com/read/29656207/dihydromyricetin-relieves-rheumatoid-arthritis-symptoms-and-suppresses-expression-of-pro-inflammatory-cytokines-via-the-activation-of-nrf2-pathway-in-rheumatoid-arthritis-model
#15
Jianguo Chu, Xiujun Wang, Huanjie Bi, Lifeng Li, Mingguang Ren, Jingwei Wang
Rheumatoid arthritis (RA) is a systemic inflammatory and autoimmune disease. In this research, we estimated the protective effects of Dihydromyricetin (DMY) on RA induced by Complete Freund's Adjuvant (CFA). We found that DMY effectively relieved rheumatoid arthritis symptoms, such as body weight change, paw swelling and rheumatoid arthritis scores. In addition, we also observed that DMY significantly lowered the immune organ indexes (including thymus and spleen) and exhibited the anti-inflammatory effect in CFA-induced rheumatoid arthritis...
April 12, 2018: International Immunopharmacology
https://www.readbyqxmd.com/read/29651440/mast-cell-the-neglected-member-of-the-tumor-microenvironment-role-in-breast-cancer
#16
REVIEW
Angélica Aponte-López, Ezequiel M Fuentes-Pananá, Daniel Cortes-Muñoz, Samira Muñoz-Cruz
Mast cells are unique tissue-resident immune cells that secrete a diverse array of biologically active compounds that can stimulate, modulate, or suppress the immune response. Although mounting evidence supports that mast cells are consistently infiltrating tumors, their role as either a driving or an opposite force for cancer progression is still controversial. Particularly, in breast cancer, their function is still under discussion. While some studies have shown a protective role, recent evidence indicates that mast cells enhance blood and lymphatic vessel formation...
2018: Journal of Immunology Research
https://www.readbyqxmd.com/read/29643764/the-idh1-mutation-induced-oncometabolite-2-hydroxyglutarate-may-affect-dna-methylation-and-expression-of-pd-l1-in-gliomas
#17
Luyan Mu, Yu Long, Changlin Yang, Linchun Jin, Haipeng Tao, Haitao Ge, Yifan E Chang, Aida Karachi, Paul S Kubilis, Gabriel De Leon, Jiping Qi, Elias J Sayour, Duane A Mitchell, Zhiguo Lin, Jianping Huang
Background: Malignant gliomas are heterogeneous brain tumors with the potential for aggressive disease progression, as influenced by suppressive immunoediting. Given the success and enhanced potential of immune-checkpoint inhibitors in immunotherapy, we focused on the connections between genetic alterations affected by IDH1 mutations and immunological landscape changes and PDL-1 expression in gliomas. Methods: Paired surgically resected tumors from lower-grade gliomas (LGGs) and glioblastomas (GBM) were investigated, and a genetic analysis of patients' primary tumor samples culled from TCGA datasets was performed...
2018: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/29627244/jugular-arginine-infusion-relieves-lipopolysaccharide-triggered-inflammatory-stress-and-improves-immunity-status-of-lactating-dairy-cows
#18
F F Zhao, T Y Wu, H R Wang, L Y Ding, Gulzar Ahmed, H W Li, W Tian, Y Z Shen
The objective of this study was to evaluate the effects of jugular l-Arg infusion on performance and immune function during lipopolysaccharide (LPS)-induced inflammation of lactating dairy cows. Eight Holstein cows (multiparous, 608.8 ± 31.5 kg) at mid-lactation were randomly assigned to 5-d jugular infusions of control (saline), Arg (3 g/h), LPS (0.033 μg/kg per h), and LPS + Arg (0.033 μg/kg per h of LPS and 3 g/h of Arg) in a replicated 4 × 4 Latin square design with 4 infusion periods separated by 10-d noninfusion periods...
April 4, 2018: Journal of Dairy Science
https://www.readbyqxmd.com/read/29625896/co-inhibitory-molecule-b7-superfamily-member-1-expressed-by-tumor-infiltrating-myeloid-cells-induces-dysfunction-of-anti-tumor-cd8-t-cells
#19
Jing Li, Younghee Lee, Yanjian Li, Yu Jiang, Huiping Lu, Wenjuan Zang, Xiaohong Zhao, Liguo Liu, Yang Chen, Haidong Tan, Zhiying Yang, Michael Q Zhang, Tak W Mak, Ling Ni, Chen Dong
The molecular mechanisms whereby CD8+ T cells become "exhausted" in the tumor microenvironment remain unclear. Programmed death ligand-1 (PD-L1) is upregulated on tumor cells and PD-1-PD-L1 blockade has significant efficacy in human tumors; however, most patients do not respond, suggesting additional mechanisms underlying T cell exhaustion. B7 superfamily member 1 (B7S1), also called B7-H4, B7x, or VTCN1, negatively regulates T cell activation. Here we show increased B7S1 expression on myeloid cells from human hepatocellular carcinoma correlated with CD8+ T cell dysfunction...
March 29, 2018: Immunity
https://www.readbyqxmd.com/read/29623079/the-significance-of-tumor-necrosis-factor-receptor-type-ii-in-cd8-regulatory-t-cells-and-cd8-effector-t-cells
#20
REVIEW
Lin-Lin Ye, Xiao-Shan Wei, Min Zhang, Yi-Ran Niu, Qiong Zhou
Tumor necrosis factor (TNF) is a pleiotropic cytokine that has both pro-inflammatory and anti-inflammatory functions. The biological functions of TNF are mediated by two receptors, TNF receptor type I (TNFR1) and TNF receptor type II (TNFR2). TNFR1 is expressed universally on almost all cell types and has been extensively studied, whereas TNFR2 is mainly restricted to immune cells and some tumor cells and its role is far from clarified. Studies have shown that TNFR2 mediates the stimulatory activity of TNF on CD4+ Foxp3+ regulatory T cells (Tregs) and CD8+ Foxp3+ Tregs, and is involved in the phenotypic stability, proliferation, activation, and suppressive activity of Tregs...
2018: Frontiers in Immunology
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