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https://www.readbyqxmd.com/read/27914100/transient-immunological-and-clinical-effectiveness-of-treating-mice-bearing-premalignant-oral-lesions-with-pd-1-antibodies
#1
Corinne A Levingston, M Rita I Young
A carcinogen-induced premalignant oral lesion model that progresses to oral cancer was used to examine the impact of blocking PD-1 on cytokine expression and on progression of lesions to cancer. The results of this study show increased production of IL-2 and the inflammatory cytokines IL-6, IL-17 and TNF-α by spleen cells of lesion-bearing mice that were treated with PD-1 antibody for one week compared to cytokine production by spleen cells of lesion-bearing mice treated with control antibody. Production of IFN-γ increased at 3 weeks of PD-1 antibody treatment, although production of the other Th1 and inflammatory mediators declined...
December 3, 2016: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/27913421/role-of-il-17a-in-murine-models-of-copd-airway-disease
#2
Haruhiko Yanagisawa, Mitsuo Hashimoto, Shunsuke Minagawa, Naoki Takasaka, Royce Ma, Catherine Moermans, Saburo Ito, Jun Araya, Alison Budelsky, Amanda Goodsell, Jody L Baron, Stephen L Nishimura
Small airway fibrosis is a major pathologic feature of chronic obstructive pulmonary disease (COPD) and is refractory to current treatments. Chronic inflammatory cells accumulate around small airways in COPD and are thought to play a major role in small airway fibrosis. Mice deficient in α/β T-cells have recently been shown to be protected from both experimental airway inflammation and fibrosis. In these models, CD4+Th17 cells and secretion of IL-17A are increased. However, a pathogenic role for IL-17 in specifically mediating fibrosis around airways has not been demonstrated...
December 2, 2016: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/27913140/comparative-analysis-of-tcdd-induced-ahr-mediated-gene-expression-in-human-mouse-and-rat-primary-b-cells
#3
Natalia Kovalova, Rance Nault, Robert Crawford, Timothy R Zacharewski, Norbert E Kaminski
2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD) is a persistent environmental pollutant that activates the aryl hydrocarbon receptor (AhR) resulting in altered gene expression. In vivo, in vitro, and ex vivo studies have demonstrated that B cells are directly impaired by TCDD, and are a sensitive target as evidenced by suppression of antibody responses. The window of sensitivity to TCDD-induced suppression of IgM secretion among mouse, rat and human B cells is similar. Specifically, TCDD must be present within the initial 12h post B cell stimulation, indicating that TCDD disrupts early signaling network(s) necessary for B lymphocyte activation and differentiation...
November 29, 2016: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/27912844/heparanase-from-basic-research-to-therapeutic-applications-in-cancer-and-inflammation
#4
Israel Vlodavsky, Preeti Singh, Ilanit Boyango, Lilach Gutter-Kapon, Michael Elkin, Ralph D Sanderson, Neta Ilan
Heparanase, the sole heparan sulfate degrading endoglycosidase, regulates multiple biological activities that enhance tumor growth, angiogenesis and metastasis. Heparanase expression is enhanced in almost all cancers examined including various carcinomas, sarcomas and hematological malignancies. Numerous clinical association studies have consistently demonstrated that upregulation of heparanase expression correlates with increased tumor size, tumor angiogenesis, enhanced metastasis and poor prognosis. In contrast, knockdown of heparanase or treatments of tumor-bearing mice with heparanase-inhibiting compounds, markedly attenuate tumor progression further underscoring the potential of anti-heparanase therapy for multiple types of cancer...
November 2016: Drug Resistance Updates: Reviews and Commentaries in Antimicrobial and Anticancer Chemotherapy
https://www.readbyqxmd.com/read/27910810/production-of-tnf-alpha-ex-vivo-is-predictive-of-an-immune-response-to-flu-vaccination-in-a-frail-elderly-population
#5
Frédéric Bloch, Bénédicte Charmeteau, Michael Tovey, Jean-François Meritet, Corinne Desaint, Odile Launay, Pierre Lebon
OBJECTIVE: To investigate the relationship between the response to influenza vaccination and the ability to produce proinflamatory cytokines in elderly subjects. METHODS: Whole blood samples from 25 elderly subjects collected before influenza vaccination were stimulated with the influenza vaccine in order to evaluate the secretion of five specific cytokines: TNFα, IFNα, IFNγ, IL2 and IL10. The results were correlated with the increased HAI antibody titres two weeks after vaccination...
September 1, 2016: European Cytokine Network
https://www.readbyqxmd.com/read/27909730/a-sensitive-and-specific-indirect-competitive-enzyme%C3%A2-linked-immunosorbent-assay-for-the-detection-of-icariin
#6
Jinjun Cheng, Yue Zhang, Shuchen Liu, Baoping Qu, Meiling Zhang, Xiaoman Liu, Yan Zhao, Huihua Qu
In the present study, a novel monoclonal antibody (MAb) specific for icariin (ICA) was prepared and characterized. A hybridoma‑secreting MAb against icariin was produced by fusing splenocytes immunized with an ICA‑bovine serum albumin conjugate with a hypoxanthine‑aminopterin‑thymidine‑sensitive mouse myeloma SP2/0 cell line. The antibody showed high specificity for ICA with almost no cross‑reactivity against the majority of structurally‑related chemicals. Subsequently, an indirect competitive enzyme‑linked immunosorbent assay (ELISA) for ICA was established and characterized...
November 30, 2016: Molecular Medicine Reports
https://www.readbyqxmd.com/read/27906979/a-phosphorylcholine-containing-glycolipid-like-antigen-present-on-the-surface-of-infective-stage-larvae-of-ascaris-spp-is-a-major-antibody-target-in-infected-pigs-and-humans
#7
Johnny Vlaminck, Dries Masure, Tao Wang, Peter Nejsum, Cornelis H Hokke, Peter Geldhof
BACKGROUND: The pig parasite Ascaris suum plays and important role in veterinary medicine and represents a suitable model for A. lumbricoides, which infects over 800 million people. In pigs, continued exposure to Ascaris induces immunity at the level of the gut, protecting the host against migrating larvae. The objective of this study was to identify and characterize parasite antigens targeted by this local immune response that may be crucial for parasite invasion and establishment and to evaluate their protective and diagnostic potential...
December 2016: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/27905837/long-term-persistence-of-immunity-after-hepatitis-b-vaccination-a-fact-not-a-fancy
#8
Andrea Trevisan
On the basis of an article previously published in the journal regarding immune persistence after hepatitis B vaccination in infancy, I discuss why this persistence is a fact and not a fancy. Immune memory after a primary vaccination series has been widely demonstrated by prompt response to booster doses and the proliferation of T cells secreting IFNγ. In a large cohort of medical students, 79% of subjects were positive for anti-HBs antibodies, and only 1.9% of the subjects had serological evidence of past hepatitis B infection...
December 1, 2016: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/27905502/immune-responsiveness-of-cd4-t-cells-during-streptococcus-suis-serotype-2-infection
#9
Marie-Pier Lecours, Corinne Letendre, Damian Clarke, Paul Lemire, Tristan Galbas, Marie-Odile Benoit-Biancamano, Jacques Thibodeau, Marcelo Gottschalk, Mariela Segura
The pathogenesis of Streptococcus suis infection, a major swine and human pathogen, is only partially understood and knowledge on the host adaptive immune response is critically scarce. Yet, S. suis virulence factors, particularly its capsular polysaccharide (CPS), enable this bacterium to modulate dendritic cell (DC) functions and potentially impair the immune response. This study aimed to evaluate modulation of T cell activation during S. suis infection and the role of DCs in this response. S. suis-stimulated total mouse splenocytes readily produced TNF-α, IL-6, IFN-γ, CCL3, CXCL9, and IL-10...
December 1, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27904691/implantation-of-placenta-derived-mesenchymal-stem-cells-accelerates-murine-dermal-wound-closure-through-immunomodulation
#10
Haifeng Wang, Lianyu Chen, Yang Liu, Bangzhen Luo, Nanzi Xie, Tao Tan, Lige Song, Pei Erli, Ming Luo
BACKGROUND: Diabetic foot ulcer (DFU) is a major complication of diabetes mellitus. Although previous studies have established that inflammation, ischemia and neuropathy contribute to the development of DFU, it is still an unmet medical need due to lack knowledge of cellular and molecular mechanisms associated with DFU. In the present study, we tested our hypothesis that subcutaneous application of human placental mesenchymal stem cells (PMSCs) can accelerate diabetic dermal wound healing by modulating immunoresponse...
2016: American Journal of Translational Research
https://www.readbyqxmd.com/read/27904530/blockade-of-il-23-ameliorates-allergic-lung-inflammation-via-decreasing-the-infiltration-of-tc17-cells
#11
Sheng Cheng, Huilong Chen, Aili Wang, Hansvin Bunjhoo, Yong Cao, Jungang Xie, Yongjian Xu, Weining Xiong
INTRODUCTION: Tc17 cells are interleukin (IL)-17-producing CD8(+) T cells and have been found to participate in the development of allergic asthma. Interleukin-23 is a cytokine that may be involved in modulating the IL-17 response via Th17 cells. This study aimed to investigate whether IL-23 also has immunomodulatory effects on Tc17 cells. MATERIAL AND METHODS: An allergic asthmatic mouse model was induced by sensitizing and challenging with ovalbumin (OVA). Anti-IL-23 antibody was administered intratracheally before challenge to the OVA-induced asthmatic mouse model...
December 1, 2016: Archives of Medical Science: AMS
https://www.readbyqxmd.com/read/27903982/m2-like-tumor-associated-macrophages-drive-vasculogenic-mimicry-through-amplification-of-il-6-expression-in-glioma-cells
#12
Lin Zhang, Yangyang Xu, Jintang Sun, Weiliang Chen, Lei Zhao, Chao Ma, Qingjie Wang, Jia Sun, Bin Huang, Yun Zhang, Xingang Li, Xun Qu
Vasculogenic mimicry (VM) has offered a new horizon for understanding tumor angiogenesis, but the mechanisms of VM in glioma progression have not been studied explicitly until now. As a significant component of immune infiltration in tumor microenvironment, macrophages have been demonstrated to play an important role in tumor growth and angiogenesis. However, whether macrophages could play a potential key role in glioma VM is still poorly understood. Herein we reported that both VM and CD163+ cells were associated with WHO grade and reduced patient survival, and VM channel counting was correlated to the number of infiltrated CD163+ cells in glioma specimens...
November 26, 2016: Oncotarget
https://www.readbyqxmd.com/read/27903863/internalization-of-secreted-antigen-targeted-antibodies-by-the-neonatal-fc-receptor-for-precision-imaging-of-the-androgen-receptor-axis
#13
Daniel L J Thorek, Philip A Watson, Sang-Gyu Lee, Anson T Ku, Stylianos Bournazos, Katharina Braun, Kwanghee Kim, Kjell Sjöström, Michael G Doran, Urpo Lamminmäki, Elmer Santos, Darren Veach, Mesruh Turkekul, Emily Casey, Jason S Lewis, Diane S Abou, Marise R H van Voss, Peter T Scardino, Sven-Erik Strand, Mary L Alpaugh, Howard I Scher, Hans Lilja, Steven M Larson, David Ulmert
Targeting the androgen receptor (AR) pathway prolongs survival in patients with prostate cancer, but resistance rapidly develops. Understanding this resistance is confounded by a lack of noninvasive means to assess AR activity in vivo. We report intracellular accumulation of a secreted antigen-targeted antibody (SATA) that can be used to characterize disease, guide therapy, and monitor response. AR-regulated human kallikrein-related peptidase 2 (free hK2) is a prostate tissue-specific antigen produced in prostate cancer and androgen-stimulated breast cancer cells...
November 30, 2016: Science Translational Medicine
https://www.readbyqxmd.com/read/27903843/downregulation-of-l-arginine-metabolism-in-dendritic-cells-induces-tolerance-to-exogenous-antigen
#14
Patricia U Simioni, Luis Gr Fernandes, Wirla Msc Tamashiro
Dendritic cells (DC) are potential tools for therapeutic applications and several strategies to generate tolerogenic DCs are under investigation. When activated by cytokines and microbial products, DCs express mediators that modulate immune responses. In this regard, the metabolites generated by the activities of inducible nitric oxide synthase (iNOS) and arginase in DCs seem to play important roles. Here, we evaluated the effects of adoptive transfer of DCs generated in vitro from bone marrow precursors (BMDC) modulated with L-NAME (Nω-nitro-L-arginine methyl ester) and NOHA (NG-Hydroxy-L-arginine), inhibitors of iNOS and arginase, respectively, upon the immune response of the wild type (BALB/c) and OVA-TCR transgenic (DO11...
November 30, 2016: International Journal of Immunopathology and Pharmacology
https://www.readbyqxmd.com/read/27903567/increased-plasma-ige-accelerate-atherosclerosis-in-secreted-igm-deficiency
#15
Dimitrios Tsiantoulas, Ilze Bot, Maria Ozsvar Kozma, Laura Goederle, Thomas Perkmann, Karsten Hartvigsen, Daniel H Conrad, Johan Kuiper, Ziad Mallat, Christoph J Binder
RATIONALE: Deficiency of secreted IgM (sIgM(-/-)) accelerates atherosclerosis in Ldlr(-/-) mice. Several atheroprotective effects of increased levels of IgM antibodies have been suggested, including preventing inflammation induced by oxidized LDL and promoting apoptotic cell clearance. However, the mechanisms by which the lack of sIgM promotes lesion formation remain unknown. OBJECTIVE: To identify the mechanisms by which sIgM deficiency accelerates atherosclerosis in mice...
November 30, 2016: Circulation Research
https://www.readbyqxmd.com/read/27899144/hypoxia-induced-responses-by-endothelial-colony-forming-cells-are-modulated-by-placental-growth-factor
#16
Michelle B Hookham, Imran H A Ali, Christina L O'Neill, Emer Hackett, Melanie H Lambe, Tina Schmidt, Reinhold J Medina, Sara Chamney, Bharathi Rao, Eibhlin McLoone, David Sweet, Alan W Stitt, Derek P Brazil
BACKGROUND: Endothelial colony-forming cells (ECFCs), also termed late outgrowth endothelial cells, are a well-defined circulating endothelial progenitor cell type with an established role in vascular repair. ECFCs have clear potential for cell therapy to treat ischaemic disease, although the precise mechanism(s) underlying their response to hypoxia remains ill-defined. METHODS: In this study, we isolated ECFCs from umbilical cord blood and cultured them on collagen...
November 29, 2016: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/27897259/artemisinin-analogue-sm934-attenuate-collagen-induced-arthritis-by-suppressing-t-follicular-helper-cells-and-t-helper-17-cells
#17
Ze-Min Lin, Xiao-Qian Yang, Feng-Hua Zhu, Shi-Jun He, Wei Tang, Jian-Ping Zuo
SM934 is an artemisinin analogue with immunosuppressive properties and potent therapeutic activity against lupus-like diseases in autoimmune mice. In this report, the therapeutic efficacy and underlying mechanisms of SM934 on rheumatoid arthritis (RA) was investigated using collagen-induced arthritis (CIA) in DBA/1J mice. We demonstrated that SM934 treatment alleviate the severity of arthritis in CIA mice with established manifestations. The therapeutic benefits were associated with ameliorated joint swelling and reduced extent of bone erosion and destruction...
November 29, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27893093/ligation-of-cd40-in-human-m%C3%A3-ller-cells-induces-p2x7-receptor-dependent-death-of-retinal-endothelial-cells
#18
Jose-Andres C Portillo, Yalitza Lopez Corcino, George R Dubyak, Timothy S Kern, Shigemi Matsuyama, Carlos S Subauste
Purpose: Cluster of differentiation 40 (CD40) is required for retinal capillary degeneration in diabetic mice, a process mediated by the retinal endothelial cells (REC) death. However, CD40 activates prosurvival signals in endothelial cells. The purpose of this study was to identify a mechanism by which CD40 triggers programmed cell death (PCD) of RECs and address this paradox. Methods: Human RECs and Müller cells were incubated with CD154 and L-N6-(1-Iminoethyl)lysine (L-Nil, nitric oxide synthase 2 inhibitor), α-lipoic acid (inhibitor of oxidative stress), anti-Fas ligand antibody, or A-438079 (P2X7 adenosine triphosphate [ATP] receptor inhibitor)...
November 1, 2016: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/27891589/critical-roles-of-conventional-dendritic-cells-in-promoting-t-cell-dependent-hepatitis-through-regulating-nkt-cells
#19
Jingya Wang, Xueting Cao, Jiliang Zhao, Huiyuan Zhao, Jun Wei, Qiuying Li, Xiaofei Qi, Zishan Yang, Li Wang, Hongru Zhang, Li Bai, Zhenzhou Wu, Liqing Zhao, Zhangyong Hong, Zhinan Yin
Dendritic cells (DC) play critical roles in initiating and regulating the innate immunity as well as the adaptive immune responses. However, the role of conventional dendritic cells (cDC) in Con A-induced fulminant hepatitis is unknown. In this study, we demonstrated that depletion of cDC using either CD11c-DTR Tg mice or anti-CD11c antibody significantly reduced the severity of liver injury, indicating a detrimental role of cDC in Con A-induced hepatitis. We further elucidated the pathological role of cDC through being the critical source of IL-12, which induced the secretion of IFN-γ by NKT cells...
November 28, 2016: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/27891129/immunological-and-translational-aspects-of-nk-cell-based-antitumor-immunotherapies
#20
REVIEW
Maxim Shevtsov, Gabriele Multhoff
Natural killer (NK) cells play a pivotal role in the first line of defense against cancer. NK cells that are deficient in CD3 and a clonal T cell receptor (TCR) can be subdivided into two major subtypes, CD56(dim)CD16(+) cytotoxic and CD56(bright)CD16(-) immunoregulatory NK cells. Cytotoxic NK cells not only directly kill tumor cells without previous stimulation by cytotoxic effector molecules, such as perforin and granzymes or via death receptor interactions, but also act as regulatory cells for the immune system by secreting cytokines and chemokines...
2016: Frontiers in Immunology
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