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https://www.readbyqxmd.com/read/28213891/opioids-and-the-immune-system-friend-or-foe
#1
REVIEW
Lisanne Mirja Plein, Heike L Rittner
Systemically administered opioids are among the most powerful analgesics for treating severe pain. Several negative side-effects (respiratory depression, addiction, nausea, confusion) and the risk of opioid-induced hyperalgesia accompany opioid administration. One other side effect is the potential of opioids to suppress the immune response and thereby to increase the vulnerability for infections. Several studies have investigated the link between opioids and immunosuppression in vitro, in vivo as well as in patients with divergent results: Exogenous opioids such as morphine and fentanyl can impair macrophage and natural killer cell as well as T cell function and weaken the gut barrier in vitro and in animal studies...
February 18, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28213501/immature-lymphocytes-inhibit-rag1-and-rag2-transcription-and-v-d-j-recombination-in-response-to-dna-double-strand-breaks
#2
Megan R Fisher, Adrian Rivera-Reyes, Noah B Bloch, David G Schatz, Craig H Bassing
Mammalian cells have evolved a common DNA damage response (DDR) that sustains cellular function, maintains genomic integrity, and suppresses malignant transformation. In pre-B cells, DNA double-strand breaks (DSBs) induced at Igκ loci by the Rag1/Rag2 (RAG) endonuclease engage this DDR to modulate transcription of genes that regulate lymphocyte-specific processes. We previously reported that RAG DSBs induced at one Igκ allele signal through the ataxia telangiectasia mutated (ATM) kinase to feedback-inhibit RAG expression and RAG cleavage of the other Igκ allele...
February 17, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28212885/epinephrine-promotes-cox-2-dependent-immune-suppression-in-myeloid-cells-and-cancer-tissues
#3
Ravikumar Muthuswamy, Nana J Okada, Frank J Jenkins, Kandace McGuire, Priscilla F McAuliffe, Herbert J Zeh, David L Bartlett, Callen Wallace, Simon Watkins, Jill D Henning, Dana H Bovbjerg, Pawel Kalinski
Activation of the sympathetic nervous system (e.g., due to stress) has been implicated in cancer progression and recurrence, but its cancer-promoting effects have been variable between different studies. Here, we report that although catecholamines, mediators of systemic sympathetic activity, display only weak immunosuppressive impact on their own, their combination with inflammatory signals leads to the induction of COX-2 and multiple COX-2-dependent suppressive factors in human myeloid cells and cancer tissues...
February 14, 2017: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/28211187/deletion-of-junctional-adhesion-molecule-a-from-platelets-increases-early-stage-neointima-formation-after-wire-injury-in-hyperlipidemic-mice
#4
Zhen Zhao, Tanja Vajen, Ela Karshovska, Annemiek Dickhout, Martin M Schmitt, Remco T A Megens, Philipp von Hundelshausen, Thomas A Koeppel, Tilman M Hackeng, Christian Weber, Rory R Koenen
Platelets play an important role in the pathogenesis of vascular remodelling after injury. Junctional adhesion molecule A (JAM-A) was recently described to regulate platelet activation. Specific deletion of JAM-A from platelets resulted in increased reactivity and in accelerated progression of atherosclerosis. The aim of this study was to investigate the specific contribution of platelet-derived JAM-A to neointima formation after vascular injury. Mice with or without platelet-specific (tr)JAM-A-deficiency in an apolipoprotein e (apoe(-/-) ) background underwent wire-induced injury of the common carotid artery...
February 17, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/28211077/severe-bullous-pemphigoid-associated-with-pembrolizumab-therapy-for-metastatic-melanoma-with-complete-regression
#5
O Rofe, G Bar-Sela, Z Keidar, T Sezin, C D Sadik, R Bergman
Bullous pemphigoid (BP) is considered to be a humorally mediated autoimmune disease, but autoreactive T-cells and T-regulatory cells (Tregs) have also been implicated in this disease. Tregs and the programmed death-1 (PD-1) : programmed death ligand (PD-L) pathway are both critical in terminating immune response, and elimination of either can result in breakdown of tolerance and development of autoimmunity. We report a patient with metastatic malignant melanoma (MM), who underwent pembrolizumab (anti-PD-1) therapy following unsuccessful treatment with ipilimumab [anti-cytotoxic T-lymphocyte-associated protein (CTLA)-4]...
February 16, 2017: Clinical and Experimental Dermatology
https://www.readbyqxmd.com/read/28211012/f4-80-inhibits-osteoclast-differentiation-via-downregulation-of-nuclear-factor-of-activated-t-cells-cytoplasmic-1
#6
Ju-Hee Kang, Jung-Sun Sim, Ting Zheng, Mijung Yim
Osteoclastogenesis is an essential process in bone metabolism, which can be induced by RANKL stimulation. The F4/80 glycoprotein is a member of the EGF-transmembrane 7 (TM7) family and has been established as a specific cell-surface marker for murine macrophages. This study aimed to identify the role of F4/80 in osteoclastogenesis. Using mouse bone marrow-derived macrophages (BMMs), we observed that the mRNA level of F4/80 was dramatically reduced as these cells differentiated into osteoclasts. Furthermore, osteoclastogenesis was decreased in F4/80(high) BMMs compared to F4/80(-/low) BMMs...
February 16, 2017: Archives of Pharmacal Research
https://www.readbyqxmd.com/read/28210263/a-paradigm-shift-on-the-question-of-b-cells-in-transplantation-recent-insights-on-regulating-the-alloresponse
#7
REVIEW
Daniel J Firl, Gilles Benichou, James I Kim, Heidi Yeh
B lymphocytes contribute to acute and chronic allograft rejection through their production of donor-specific antibodies (DSAs). In addition, B cells present allopeptides bound to self-MHC class II molecules and provide costimulation signals to T cells, which are essential to their activation and differentiation into memory T cells. On the other hand, both in laboratory rodents and patients, the concept of effector T cell regulation by B cells is gaining traction in the field of transplantation. Specifically, clinical trials using anti-CD20 monoclonal antibodies to deplete B cells and reverse DSA had a deleterious effect on rates of acute cellular rejection; a peculiar finding that calls into question a central paradigm in transplantation...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28210258/human-gingiva-derived-mesenchymal-stem-cells-inhibit-xeno-graft-versus-host-disease-via-cd39-cd73-adenosine-and-ido-signals
#8
Feng Huang, Maogen Chen, Weiqian Chen, Jian Gu, Jia Yuan, Yaoqiu Xue, Junlong Dang, Wenru Su, Julie Wang, Homayoun H Zadeh, Xiaoshun He, Limin Rong, Nancy Olsen, Song Guo Zheng
Mesenchymal stem cells have the capacity to maintain immune homeostasis and prevent autoimmunity. We recently reported that human-derived gingival mesenchymal stem cells (GMSCs) have strong capacity to suppress immune responses and T cell-mediated collagen-induced arthritis in animals. However, it is unclear whether these cells can suppress human T cell-mediated diseases. Here, we used a xenogenic GVHD model in the NOD/SCID mouse, which is a useful preclinical construct for evaluating the therapeutic and translational potential of this approach for applications in human disease...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28209904/noninvasive-imaging-of-human-immune-responses-in-a-human-xenograft-model-of-graft-versus-host-disease
#9
Catharina H M J Van Elssen, Mohammad Rashidian, Vladimir Vrbanac, Kai W Wucherpfennig, Zeina El Habre, Jana Sticht, Christian Freund, Johanne Jacobsen, Juanjo Cragnolini, Jessica Ingram, Loes Plaisier, Eric Spierings, Andrew M Tager, Hidde Ploegh
The immune system plays a crucial role in many diseases. Activation or suppression of immunity is often related to clinical outcome. Methods to explore the dynamics of immune responses are important to elucidate their role in conditions characterized by inflammation, such as infectious disease, cancer or auto-immunity. Immuno-PET is a non-invasive method by which disease and immune cell infiltration can be explored simultaneously. Using radiolabeled antibodies or fragments derived from them, it is possible to image disease-specific antigens and immune cell subsets...
February 16, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/28209773/mannan-binding-lectin-a-serum-collectin-suppresses-t-cell-proliferation-via-direct-interaction-with-cell-surface-calreticulin-and-inhibition-of-proximal-t-cell-receptor-signaling
#10
Na Zhao, Jie Wu, Simin Xiong, Liyun Zhang, Xiao Lu, Shangliang Chen, Qifeng Wu, Hailan Wang, Ying Liu, Zhengliang Chen, Daming Zuo
Mannan binding lectin (MBL), initially described to activate the complement pathway, is also known to be involved in the pathogenesis of autoimmune diseases. We report a thus far unknown function of MBL as a suppressor of T-cell activation. MBL markedly inhibited T-cell proliferation induced by anti-CD3 and anti-CD28 antibodies. Moreover, the presence of MBL during T-cell priming interfered with proximal T-cell receptor signaling by decreasing phosphorylation of Lck, ZAP-70, and LAT. MBL bound to T cells through interaction between the collagen-like region of MBL and calreticulin (CRT) expressed on the T-cell surface...
February 16, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/28209368/correlation-of-micro-vessel-density-and-c-myc-expression-in-breast-tumor-of-mice-following-mesenchymal-stem-cell-therapy
#11
Maryam Adelipour, Fatemeh Babaei, Mohammadreza Mirzababaei, Abdolamir Allameh
Stem cell therapy for degenerative diseases has been established; however there are controversies over the treatment of solid tumors with stem cell transplantation. In the present study, the anti-tumor action of mesenchymal stem cells (MSCs) has been examined in a mouse model of breast cancer with emphasize on tumor growth, angiogenesis and c-Myc expression in breast tumors. For this purpose, MSCs were isolated from bone marrow of Balb/c mice and characterized. A Balb/c mouse model of breast cancer was developed and subjected to cell therapy intra venous (I...
January 30, 2017: Tissue & Cell
https://www.readbyqxmd.com/read/28209174/mouse-genomic-screen-reveals-novel-host-regulator-of-metastasis
#12
Toni Celià-Terrassa, Yibin Kang
Tumor cells have to overcome challenges in the host tissue microenvironment to metastasize successfully to distant organs. In a recent Nature study, a genome-wide functional screen demonstrated that deficiency of the sphingosine-1-phoshate (S1P) transporter gene Spns2 in endothelium increased immune-mediated cell killing by T cells and natural killer (NK) cells, thereby suppressing metastatic colonization.
February 16, 2017: Genome Biology
https://www.readbyqxmd.com/read/28208102/oncogenic-growth-factor-signaling-mediating-tumor-escape-from-cellular-immunity
#13
REVIEW
Fernando Concha-Benavente, Robert L Ferris
Unrestrained growth factor signals can promote carcinogenesis, as well as other hallmarks of cancer such as immune evasion. Our understanding of the function and complex regulation of HER family of receptors has led to the development of targeted therapeutic agents that suppress tumor growth. However, these receptors also mediate escape from recognition by the host immune system. We discuss how HER family of oncogenic receptors downregulate tumor antigen presentation and upregulate suppressive membrane-bound or soluble secreted inhibitory molecules that ultimately lead to impaired cellular immunity mediated by cytotoxic T lymphocyte (CTL) recognition...
February 13, 2017: Current Opinion in Immunology
https://www.readbyqxmd.com/read/28207945/cd4-cd25-garp-tregs-display-a-compromised-suppressive-function-in-patients-with-dilated-cardiomyopathy
#14
Yuzhen Wei, Kunwu Yu, Hui Wei, Xin Su, Ruirui Zhu, Huairui Shi, Haitao Sun, Quan Luo, Wenbin Xu, Junhui Xiao, Yucheng Zhong, Qiutang Zeng
Dilated cardiomyopathy (DCM) is a lethal inflammatory heart disease and closely connected with dysfunction of the immune system. Glycoprotein -A repetitions predominant (GARP) expressed on activated CD4(+) T cells with suppressive activity has been established. This study aimed to investigate the frequency and function of circulating CD4(+) CD25(+) GARP(+) regulatory T cells (Tregs) in DCM. 45 DCM patients and 46 controls were enrolled in this study. There was a significant increase in peripheral Th1 and Th17 number and their related cytokines (IFN-γ, IL-17), and an obvious decrease in Treg number, TGF-β1 levels and the expression of FOXP3 and GARP in patients with DCM as compared with controls...
February 16, 2017: Immunology
https://www.readbyqxmd.com/read/28207500/strategic-use-of-dual-regimens-of-boosted-protease-inhibitors-plus-maraviroc-in-poorly-adherent-subjects-in-view-of-long-acting-drugs-a-retrospective-study
#15
Amedeo Ferdinando Capetti, Mariangela Micale, Laura Carenzi, Fosca Niero, Simona Landonio, Stefania Vimercati, Gianfranco Dedivitiis, Giuliano Rizzardini
In view of the forthcoming long-acting antiretrovirals, measures should be taken to prevent the selection of HIV drug resistance mutations. All subjects who had been switched to boosted protease inhibitors plus maraviroc (bPIs/MVC) with baseline HIV-1 RNA >50 copies/mL between June, 2014, and April, 2015, were retrospectively evaluated. HIV-1 RNA, CD4+ T-cells, serum glucose, creatinine, ALT, and adverse events were controlled every 3 to 4 months. We retrospectively analyzed 44 patients: 18 were taking darunavir/ritonavir (DRV/r) and 26 atazanavir/ritonavir (ATV/r) once daily, plus MVC 300 mg once daily...
February 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28207489/b-cell-abnormalities-and-impact-on-antibody-response-in-hiv-infection
#16
Alessandra Noto, Giuseppe Pantaleo
PURPOSE OF REVIEW: The purpose of the present review is to provide an update on the current development in the field of broadly neutralizing antibodies (bNabs) and their potential use in the prevention and therapeutic settings, and an evaluation of the B-cell abnormalities that may impair antibody responses in HIV infection. RECENT FINDINGS: Major advances have been achieved in the characterization of bNabs directed against different vulnerable regions of HIV Envelope (Env)...
February 15, 2017: Current Opinion in HIV and AIDS
https://www.readbyqxmd.com/read/28207428/il-37-ameliorates-coxsackievirus-b3-induced-viral-myocarditis-by-modulating-the-th17-treg-immune-response
#17
Bang An, Xuefei Liu, Ge Li, Haitao Yuan
Myocarditis is a heterogeneous group of disorders defined by inflammation of the heart muscle with an excessively activated immune response. Numerous interventions have been investigated for the treatment of myocarditis while success is limited. Interleukin-37 (IL-37), a novel member of the IL-1 cytokine family, is a natural inhibitor of innate immunity associated with autoimmune diseases. However, the modulatory effect of IL-37 in myocarditis is unknown. In this study, we investigated the immunological regulation of IL-37 in the coxsackievirus B3-induced model of murine viral myocarditis...
February 14, 2017: Journal of Cardiovascular Pharmacology
https://www.readbyqxmd.com/read/28205616/dependence-on-glycolysis-sensitizes-braf-mutated-melanomas-for-increased-response-to-targeted-braf-inhibition
#18
Keisha N Hardeman, Chengwei Peng, Bishal B Paudel, Christian T Meyer, Thong Luong, Darren R Tyson, Jamey D Young, Vito Quaranta, Joshua P Fessel
Dysregulated metabolism can broadly affect therapy resistance by influencing compensatory signaling and expanding proliferation. Given many BRAF-mutated melanoma patients experience disease progression with targeted BRAF inhibitors, we hypothesized therapeutic response is related to tumor metabolic phenotype, and that altering tumor metabolism could change therapeutic outcome. We demonstrated the proliferative kinetics of BRAF-mutated melanoma cells treated with the BRAF inhibitor PLX4720 fall along a spectrum of sensitivity, providing a model system to study the interplay of metabolism and drug sensitivity...
February 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28204822/melittin-inhibits-osteoclast-formation-through-the-downregulation-of-the-rankl-rank-signaling-pathway-and-the-inhibition-of-interleukin-1%C3%AE-in-murine-macrophages
#19
Jung-Yoon Choe, Seong-Kyu Kim
Melittin is a major toxic component of bee venom (Apis mellifera). It is not known whether melittin is involved in bone metabolism and osteoclastogenesis. The aim of this study was to determine the role of melittin in the regulation of osteoclastogenesis. In vitro osteoclastogenesis assays were performed using mouse RAW 264.7 cells and bone marrow-derived macrophages (BMMs) treated with receptor activator of nuclear factor-κB ligand (RANKL) and macrophage colony-stimulating factor (M-CSF). Morphologic and functional analyses for osteoclast-like multinucleated cells (MNCs) were performed by tartrate-resistant acid phosphatase (TRAP) staining, F-actin staining and pit formation methods...
February 3, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/28204810/htlv-1-basic-leucine-zipper-factor-downregulates-cyclin%C3%A2-d1-expression-via-interactions-with-nf-%C3%AE%C2%BAb
#20
Yunyun Ma, Bo Zhang, Dong Wang, Lili Qian, Xianmei Song, Xueyin Wang, Chaokuan Yang, Guoqiang Zhao
Human T cell leukemia virus type 1 (HTLV-1) is an oncogenic retrovirus. It can cause adult T cell leukemia (ATL) and other diseases. The HTLV-1 basic leucine zipper (bZIP) factor (HBZ), which is encoded by the minus-strand of the provirus, is expressed in all cases of ATL and involved in T cell proliferation. However, the exact mechanism underlying its growth-promoting activity is poorly understood. Herein, we demonstrated that HBZ suppressed cyclin D1 expression by inhibiting the nuclear factor (NF)-κB signaling pathway...
January 26, 2017: International Journal of Molecular Medicine
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