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https://www.readbyqxmd.com/read/28644966/an-immunosuppressive-function-of-interleukin-35-in-chronic-hepatitis-c-virus-infection
#1
Siqi Liu, Qian Zhang, Xue Shao, Wenrui Wang, Chuanhui Zhang, Zhenjing Jin
Interleukin (IL)-35, a newly identified member of the IL-12 cytokine family, has been reported to suppress inflammation and induce immunotolerance. However, little is known regarding the role of IL-35 during chronic hepatitis C virus (HCV) infection. Herein, we measured the serum IL-35 concentration of 73 patients with hepatitis C and 22 healthy individuals, as well as further investigated the modulatory function of IL-35 on CD4(+)CD25(+)CD127(dim/-) regulatory T cells (Tregs) and on hepatocytes infected with HCV in cell culture (HCVcc)...
June 20, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/28644158/radiology-case-of-the-month-idiopathic-cd4-lymphocytopenia
#2
Chris Malone, Neel D Gupta, Amit Kothari, Enrique Palacios, Harold Neitzschman
A 39 year-old male with a history of diabetes, retinitis pigmentosa, and genital warts presented with intractable occipital headaches accompanied with nausea and vomiting. The patient had markedly depressed CD4 counts. Furthermore the patient tested negative for HIV and HTLV 1/2 and had normal immunoglobulin levels. During hospital course the patient underwent a lumbar puncture and multiple imaging exams, including both CT and MR. Except for occasional nausea and vomiting controlled by therapeutic lumbar punctures, phenergan, and dilaudid the patient's hospital course was uncomplicated...
May 2017: Journal of the Louisiana State Medical Society: Official Organ of the Louisiana State Medical Society
https://www.readbyqxmd.com/read/28643847/ncr1-deficiency-diminishes-the-generation-of-protective-murine-cytomegalovirus-antibodies-by-limiting-follicular-helper-t-cell-maturation
#3
Antonija Miletic, Maja Lenartic, Branka Popovic, Ilija Brizic, Tihana Trsan, Karmela Miklic, Ofer Mandelboim, Astrid Krmpotic, Stipan Jonjic
NKp46/NCR1 is an activating NK-cell receptor implicated in the control of various viral and bacterial infections. Recent findings also suggest that it plays a role in shaping the adaptive immune response to pathogens. Using NCR1-deficient (NCR1(gfp/gfp) ) mice we provide evidence for the role of NCR1 in antibody response to mouse cytomegalovirus infection (MCMV). The absence of NCR1 resulted in impaired maturation, function and NK-cell migration to regional lymph nodes. In addition, CD4(+) T-cell activation and follicular helper T-cell (Tfh) generation were reduced, leading to inferior germinal center (GC) B-cell maturation...
June 23, 2017: European Journal of Immunology
https://www.readbyqxmd.com/read/28642841/strain-and-dose-dependent-reduction-of-toxoplasma-gondii-burden-in-pigs-is-associated-with-interferon-gamma-production-by-cd8-lymphocytes-in-a-heterologous-challenge-model
#4
Malgorzata Jennes, Stéphane De Craeye, Bert Devriendt, Katelijne Dierick, Pierre Dorny, Eric Cox
Toxoplasma gondii is a worldwide prevalent parasite of humans and animals. The global infection burden exceeds yearly one million disability-adjusted life years (DALY's) in infected individuals. Therefore, effective preventive measures should be taken to decrease the risk of infection in humans. Although human toxoplasmosis is predominantly foodborne by ingestion of tissue cysts in meat from domestic animals such as pigs, the incidence risk is difficult to estimate due to the lack of screening of animals for infection and insights in location and persistence of the parasite in the tissues...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28642819/adoptive-cell-therapy-using-pd-1-myeloma-reactive-t-cells-eliminates-established-myeloma-in-mice
#5
Weiqing Jing, Jill A Gershan, Grace C Blitzer, Katie Palen, James Weber, Laura McOlash, Matthew Riese, Bryon D Johnson
BACKGROUND: Adoptive cellular therapy (ACT) with cancer antigen-reactive T cells following lymphodepletive pre-conditioning has emerged as a potentially curative therapy for patients with advanced cancers. However, identification and enrichment of appropriate T cell subsets for cancer eradication remains a major challenge for hematologic cancers. METHODS: PD-1(+) and PD-1(-) T cell subsets from myeloma-bearing mice were sorted and analyzed for myeloma reactivity in vitro...
2017: Journal for Immunotherapy of Cancer
https://www.readbyqxmd.com/read/28642803/transcriptomic-profiles-of-aging-in-na%C3%A3-ve-and-memory-cd4-cells-from-mice
#6
Jackson Taylor, Lindsay Reynolds, Li Hou, Kurt Lohman, Wei Cui, Stephen Kritchevsky, Charles McCall, Yongmei Liu
BACKGROUND: CD4+ T cells can be broadly divided into naïve and memory subsets, each of which are differentially impaired by the aging process. It is unclear if and how these differences are reflected at the transcriptomic level. We performed microarray profiling on RNA derived from naïve (CD44(low)) and memory (CD44(high)) CD4+ T cells derived from young (2-3 month) and old (28 month) mice, in order to better understand the mechanisms of age-related functional alterations in both subsets...
2017: Immunity & Ageing: I & A
https://www.readbyqxmd.com/read/28642802/perk-dependent-defective-tcr-mediated-activation-of-cd4-t-cells-in-end-stage-renal-disease-patients
#7
Ling Huang, Nicolle H R Litjens, Nynke M Kannegieter, Mariska Klepper, Carla C Baan, Michiel G H Betjes
BACKGROUND: Patients with end-stage renal disease (ESRD) have an impaired immune response with a prematurely aged T-cell system. Mitogen-activated protein kinases (MAPKs) including extracellular signal-regulated kinase (ERK) and p38, regulate diverse cellular programs by transferring extracellular signals into an intracellular response. T cell receptor (TCR)-induced phosphorylation of ERK (pERK) may show an age-associated decline, which can be reversed by inhibiting dual specific phosphatase (DUSP) 6, a cytoplasmic phosphatase with substrate specificity to dephosphorylate pERK...
2017: Immunity & Ageing: I & A
https://www.readbyqxmd.com/read/28642743/hiv-1-nef-signaling-in-intestinal-mucosa-epithelium-suggests-the-existence-of-an-active-inter-kingdom-crosstalk-mediated-by-exosomes
#8
REVIEW
Cristina Felli, Olimpia Vincentini, Marco Silano, Andrea Masotti
The human intestinal mucosal surface represents the first defense against pathogens and regulates the immune response through the combination of epithelial cell (EC) functions and immunological factors. ECs act as sensors of luminal stimuli and interact with the immune cells through signal-transduction pathways, thus representing the first barrier that HIV-1 virus encounters during infection. In particular, the HIV-1 Nef protein plays a crucial role in viral invasion and replication. Nef is expressed early during viral infection and interacts with numerous cellular proteins as a scaffold/adaptor...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28642280/granulocytes-as-modulators-of-dendritic-cell-function
#9
REVIEW
Annelot Breedveld, Tom Groot Kormelink, Marjolein van Egmond, Esther de Jong
Effector T cell development is directly driven by APCs, in particular, by antigen-primed dendritic cells (DCs). Depending on the pathogenic stimulus and the microenvironment, DCs induce proliferation and polarization of naive CD4(+) T cells into different effector subsets, such as Th1, Th2, Th17, or regulatory T cells (Tregs). During inflammation, DCs are found in close proximity to other innate immune cells, including all granulocyte subtypes, which potentially influence the immunomodulatory capacities of DCs...
June 22, 2017: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/28642246/modulation-of-endoplasmic-reticulum-stress-controls-cd4-t-cell-activation-and-anti-tumor-function
#10
Jessica E Thaxton, Caroline Wallace, Brian Riesenberg, Yongliang Zhang, Chrystal Paulos, Craig Beeson, Bei Liu, Zihai Li
The endoplasmic reticulum (ER) is an energy-sensing organelle with intimate ties to programming cell activation and metabolic fate. T-cell receptor (TCR) activation represents a form of acute cell stress and induces mobilization of ER Ca(2+) stores. The role of the ER in programming T-cell activation and metabolic fate remains largely undefined. Gp96 is an ER protein with functions as a molecular chaperone and Ca(2+) buffering protein. We hypothesized that the ER stress response may be important for CD4(+) T-cell activation and that gp96 may be integral to this process...
June 22, 2017: Cancer Immunology Research
https://www.readbyqxmd.com/read/28642148/biological-activity-of-glatiramer-acetate-on-treg-and-anti-inflammatory-monocytes-persists-for-more-than-10years-in-responder-multiple-sclerosis-patients
#11
Michela Spadaro, Francesca Montarolo, Simona Perga, Serena Martire, Federica Brescia, Simona Malucchi, Antonio Bertolotto
Glatiramer acetate (GA) is a widely used treatment for multiple sclerosis (MS), with incompletely defined mechanism of action. Short-term studies suggested its involvement in the modulation of anti-inflammatory cytokines and regulatory T cells (Treg), while long-term effect is still unknown. To investigate this aspect, we analyzed by flow-cytometry peripheral-blood Treg, natural killer (NK), CD4 and CD8 T-cells and anti-inflammatory CD14(+)CD163(+) monocytes from 37 healthy donor and 90 RRMS patients divided in untreated, treated with GA for 12months and from 34 to 192months...
June 19, 2017: Clinical Immunology: the Official Journal of the Clinical Immunology Society
https://www.readbyqxmd.com/read/28642110/pedf-plus-dha-modulate-inflammation-and-stimulate-nerve-regeneration-after-hsv-1-infection
#12
Jiucheng He, Donna Neumann, Azucena Kakazu, Thang Luong Pham, Farhana Musarrat, M Soledad Cortina, Haydee E P Bazan
Herpes simplex virus type-1 (HSV-1) infection leads to impaired corneal sensation and, in severe cases, to corneal ulceration, melting and perforation. Here, we explore the potential therapeutic action of pigment epithelial-derived factor (PEDF) plus docosahexaenoic acid (DHA) on corneal inflammation and nerve regeneration following HSV-1 infection. Rabbits inoculated with 100,000 PFU/eye of HSV-1 strain 17Syn+ were treated with PEDF + DHA or vehicle. PEDF + DHA treatment resulted in a biphasic immune response with stronger infiltration of CD4+T cells, neutrophils and macrophages at 7-days post-treatment (p...
June 19, 2017: Experimental Eye Research
https://www.readbyqxmd.com/read/28642092/chemokine-ccl17-is-expressed-by-dendritic-cells-in-the-cns-during-experimental-autoimmune-encephalomyelitis-and-promotes-pathogenesis-of-disease
#13
Christina Ruland, Hannes Renken, Ivan Kuzmanov, Arezoo Fattahi Mehr, Kathrin Schwarte, Manuela Cerina, Alexander Herrmann, David-Marian Otte, Andreas Zimmer, Nicholas Schwab, Sven G Meuth, Volker Arolt, Luisa Klotz, Irmgard Förster, Stefanie Scheu, Judith Alferink
The CC chemokine ligand 17 (CCL17) and its cognate CC chemokine receptor 4 (CCR4) are known to control leukocyte migration, maintenance of TH17 cells, and regulatory T cell (Treg) expansion in vivo. In this study we characterized the expression and functional role of CCL17 in the pathogenesis of experimental autoimmune encephalomyelitis (EAE). Using a CCL17/EGFP reporter mouse model, we could show that CCL17 expression in the CNS can be found in a subset of classical dendritic cells (DCs) that immigrate into the CNS during the effector phase of MOG-induced EAE...
June 19, 2017: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/28641651/-effect-of-infusion-of-recipient-spleen-cells-at-different-time-after-murine-haploidentical-hematopoietic-stem-cell-transplantation-on-graft-versus-host-disease
#14
Jun-Hui Wang, Lei Deng, Lu Wang, Chen Liang, Yi Wang, Tie-Qiang Liu, Shan Huang, Ya-Jing Huang, Bo Cai, Zheng Dong, Hong-Li Zuo, Qi-Yun Sun, Jian-Hui Qiao, Chang-Lin Yu, Kai-Xun Hu, Hui-Sheng Ai, Mei Guo
OBJECTIVE: To explore the effect of infusing G-CSF mobilized recipient spleen cells at different time after haploidentical stem cell transplantation(HSCT) on graft-versus-host disease (GVHD) in mice and its possible mechanism. METHODS: Forty mice after HSCT were randomly divided into 4 groups (n=10): GVHD positive control group (control group), 1st d recipient cell infusion group after transplantation (+1 d group), 4th d recipient cell infusion group after transplantation(+4 d group), 7th d recipient cell infusion group after transplantation(+7 d group)...
June 2017: Zhongguo Shi Yan Xue Ye Xue za Zhi
https://www.readbyqxmd.com/read/28641617/-biological-characteristics-and-therapeutic-efficacy-of-103-patients-with-acute-erythroleukemia
#15
Yue Yin, Wen-Qi Zhan, Hui-Fang Huang, Chen-Qing Zhang, Dang-Hui Fu, Shu-Juan Xu, Jian-Da Hu, Xin-Ji Chen
OBJECTIVE: To investigate the biological characteristics and therapeutic efficacyt of acute erythroleukemia (AEL,AML-M6). METHODS: Blood cell count, liver function, lactate dehydrogenase level, coagulation, morphology, immunology, cell genetics and molecular biology were retrospectively analyzed in 103 cases of acute erythroleukemia patients admitted in our department from May 2016 to June 2009. The therapeutic efficacy was observed by means of remission rate, relapse rate, relapse-free survival and overall survival...
June 2017: Zhongguo Shi Yan Xue Ye Xue za Zhi
https://www.readbyqxmd.com/read/28641539/role-of-host-factors-on-the-regulation-of-tat-mediated-hiv-1-transcription
#16
Guillaume Mousseau, Susana T Valente
BACKGROUND: The viral transactivator Tat protein is a key modulator of HIV-1 replication, as it regulates transcriptional elongation from the integrated proviral genome. Tat recruits the human transcription elongation factor b, and other host proteins, such as the super elongation complex, to activate the cellular RNA polymerase II, normally stalled shortly after transcription initiation at the HIV promoter. By means of a complex set of interactions with host cellular factors, Tat determines the fate of viral activity within the infected cell...
June 22, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28641535/hiv-1-transcription-inhibitors-increase-the-synthesis-of-viral-non-coding-rna-that-contribute-to-latency
#17
Yao A Akpamagbo, Catherine DeMarino, Michelle L Pleet, Angela Schwab, Myosotys Rodriguez, Robert A Barclay, Gavin Sampey, Sergey Iordanskiy, Nazira El-Hage, Fatah Kashanchi
BACKGROUND: HIV-1 can be preserved in long-lived resting CD4+ T- and myeloid cells, forming a viral reservoir in tissues of the infected individuals. Infected patients primarily receive cART, which, to date, is the most efficient treatment against HIV/AIDS. However, the major problem in the eradication of HIV-1 from patients is the lack of therapeutic approaches to recognize the latent HIV-1 provirus and to eliminate latently infected cells. RESULTS: In the current review, we describe the effect of HIV-1 transcriptional inhibitors CR8#13 and F07#13 using a series of in vitro and in vivo assays...
June 22, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28641471/evaluation-of-immunomodulatory-effects-of-zearalenone-in-mice
#18
Mohammad Rafiqul Islam, Jong Won Kim, Yoon-Seok Roh, Jong-Hoon Kim, Han Kang Min, Hyung-Joo Kwon, Chae Woong Lim, Bumseok Kim
Zearalenone (ZEA) is a non-steroidal estrogenic mycotoxin produced by Fusarium species. The toxicity of ZEA has been evaluated for reproductive and developmental effects; however, there is little evidence about its acute toxicity or general immunotoxicity. In the present study, immune regulatory functions were investigated in mice that had been exposed to ZEA (5 or 20 mg/kg BW) daily for 14 days. Results showed that sub-populations of CD4(+), CD8(+) and CD11c(+) cells in the spleen and CD4(+), CD8(+) and F4/80(+) cells in the mesenteric lymph nodes (MLN) of ZEA (20 mg/kg)-exposed hosts were decreased compared to those in the control mice...
December 2017: Journal of Immunotoxicology
https://www.readbyqxmd.com/read/28640942/polyfunctional-response-by-immtac-imcgp100-redirected-cd8-and-cd4-t-cells
#19
Caroline Boudousquie, Giovanna Bossi, Jacob M Hurst, Karolina A Rygiel, Bent K Jakobsen, Namir J Hassan
The success of immune system based cancer therapies depends on a broad immune response engaging a range of effector cells and mechanisms. Immune mobilising monoclonal TCRs against cancer (ImmTAC(™) molecules, fusion proteins consisting of a soluble, affinity enhanced TCR and an anti-CD3 scFv Ab) were previously shown to redirect CD8(+) and CD4(+) T cells against tumours. Here we present evidence that IMCgp100 (ImmTAC recognising a peptide derived from the melanoma-specific protein, gp100, presented by HLA-A*0201) efficiently redirects and activates effector and memory cells from both CD8(+) and CD4(+) repertoires...
June 22, 2017: Immunology
https://www.readbyqxmd.com/read/28640738/evaluation-of-the-effect-and-mechanism-of-action-of-local-phenytoin-in-treatment-of-vitiligo
#20
Asmaa Gaber Abdou, Mohammed Abdelwahed Gaber, Nada Farag Elnaidany, Ayat Elnagar
There are many theories explaining vitiligo such as genetic, autoimmune, neural, free radicals, biochemical, intrinsic defect, melanocytorrhagy and convergent theories. Phenytoin is a widely used anticonvulsant, which is used in cutaneous medicine for treatment of ulcers and epidermolysis bullosa. The aim of this study is to assess the effectiveness of topical phenytoin gel in treatment of vitiligo patients and explaining the underlying mechanism using immunohistochemistry for evaluation of HMB45, CD4 and CD8...
June 22, 2017: Journal of Immunoassay & Immunochemistry
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