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CD40 Ligand

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https://www.readbyqxmd.com/read/28214521/neuroprotective-effect-of-salvianolic-acid-b-against-cerebral-ischemic-injury-in-rats-via-the-cd40-nf-%C3%AE%C2%BAb-pathway-associated-with-suppression-of-platelets-activation-and-neuroinflammation
#1
Shixin Xu, Aiqin Zhong, Huining Ma, Dan Li, Yue Hu, Yingzhi Xu, Junping Zhang
Neuroinflammation plays a critical role in the pathogenesis of ischemia/reperfusion (I/R) injury. Activated platelets are increasingly regarded as initiators and/or amplifiers of inflammatory processes in cerebral I/R injury. Salvianolic acid B (SAB) is the most abundant bioactive compound of Salviae miltiorrhizae, a well-known Chinese herb used to promote blood circulation and eliminating blood stasis. S. miltiorrhizae has been used clinically in Asia for the treatment of ischemic cerebrovascular diseases...
February 15, 2017: Brain Research
https://www.readbyqxmd.com/read/28208125/mean-platelet-volume-in-heterozygous-beta-thalassaemia
#2
Mehmet Ali Cikrikcioglu, Kenan Celik, Iskender Ekinci, Muharrem Nasifov, Aybala Erek Toprak, Guven Cetin, Sema Genc
BACKGROUND/AIM: It is not known why cerebrovascular and cardiovascular ischaemic events are less frequently observed in heterozygous beta thalassaemia (HBT) patients than in the general population. However, we previously reported that serum levels of some platelet function markers, i.e. soluble CD40 ligand and soluble P-selectin, are lower in patients with HBT than in controls. A high mean platelet volume (MPV) is an indicator of in vivo platelet activation and may indicate a tendency to thrombosis...
February 17, 2017: Acta Haematologica
https://www.readbyqxmd.com/read/28194020/cd103-lung-dendritic-cells-ldcs-induce-stronger-th1-th17-immunity-to-a-bacterial-lung-infection-than-cd11b-hi-ldcs
#3
Sudhanshu Shekhar, Ying Peng, Shuhe Wang, Xi Yang
Recent studies suggest differential roles for CD103+ and CD11b(hi) lung dendritic cells (LDCs) in host defense against viral and bacterial infections. In this study, we examined the contribution of these LDC subsets in protective immunity to chlamydial lung infection using a Chlamydia muridarum mouse infection model. We found that CD103+ LDCs showed higher expression of costimulatory molecules (CD40, CD80 and CD86) and increased production of cytokines (IL-12p70, IL-10, IL-23 and IL-6) compared with CD11b(hi) LDCs, but the expression of programmed death-ligand 1 (PD-L1) was similar between the two subsets...
February 13, 2017: Cellular & Molecular Immunology
https://www.readbyqxmd.com/read/28185008/physical-activity-initiated-by-employer-induces-improvements-in-a-novel-set-of-biomarkers-of-inflammation-an-8-week-follow-up-study
#4
Lars-Kristian Lunde, Øivind Skare, Hans C D Aass, Asgeir Mamen, Elín Einarsdóttir, Bente Ulvestad, Marit Skogstad
PURPOSE: We investigated the level of pro- and anti-inflammatory biomarkers before and after 8 weeks of unsupervised physical activity (PA) initiated by employer. METHODS: During autumn 2014, background data, blood samples and self-reported exercise level were collected from 76 men and 41 women in a Norwegian road maintenance company. Monocyte chemoattractant protein-1 (MCP-1), tumor necrosis factor-alpha (TNF-α), interleukin-6 (IL-6), leptin, adiponectin, p-selectin and CD40 ligand (CD40L) were analyzed...
February 9, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28182009/hetero-oligomerization-between-the-tnf-receptor-superfamily-members-cd40-fas-and-trailr2-modulate-cd40-signalling
#5
Cristian R Smulski, Marion Decossas, Neila Chekkat, Julien Beyrath, Laure Willen, Gilles Guichard, Raquel Lorenzetti, Marta Rizzi, Hermann Eibel, Pascal Schneider, Sylvie Fournel
TNF receptor superfamily members (TNFRSF) such as CD40, Fas and TRAIL receptor 2 (TRAILR2) participate to the adaptive immune response by eliciting survival, proliferation, differentiation and/or cell death signals. The balance between these signals determines the fate of the immune response. It was previously reported that these receptors are able to self-assemble in the absence of ligand through their extracellular regions. However, the role of this oligomerization is not well understood, and none of the proposed hypotheses take into account potential hetero-association of receptors...
February 9, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28141921/a-tale-of-two-pathways-renewing-the-promise-of-anti-cd40l-blockade
#6
EDITORIAL
A W Thomson, M B Ezzelarab
Amongst the most promising alternative immunosuppressive strategies to overcome the limitations of calcineurin inhibition in organ transplantation has for some time, been the blockade of co-stimulatory pathways that are essential for naïve T cell activation. The most important and best characterized of these are the CD80/86-CD28/CTLA4 and CD40-CD40L(CD154) ligand-receptor pathways. More than twenty years ago, compelling reports (1) showed that selective blocking of these pathways was highly effective in promoting long-term allograft acceptance/tolerance in rodents...
January 31, 2017: American Journal of Transplantation
https://www.readbyqxmd.com/read/28127757/donor-bone-marrow-cells-are-essential-for-inkt-cell-mediated-foxp3-treg-cell-expansion-in-a-murine-model-of-transplantation-tolerance
#7
Satoshi Miyairi, Toshihito Hirai, Rumi Ishii, Masayoshi Okumi, Shinichi Nunoda, Kenji Yamazaki, Yasuyuki Ishii, Kazunari Tanabe
Mixed chimerism induction is the most reliable method for establishing transplantation tolerance. We previously described a novel treatment using a suboptimal dose of anti-CD40 ligand (anti-CD40L) and liposomal formulation of a ligand for invariant natural killer T cells administered to sub-lethally irradiated recipient mice after donor bone marrow cell (BMC) transfer. Recipient mice treated with this regimen showed expansion of a Foxp3-positive regulatory T(Treg) cell phenotype, and formation of mixed chimera...
January 26, 2017: European Journal of Immunology
https://www.readbyqxmd.com/read/28125840/association-of-high-mobility-group-box-1-with-th-cell-related-cytokines-in-the-vitreous-of-ocular-sarcoidosis-patients
#8
Masaru Takeuchi, Manzo Taguchi, Tomohito Sato, Kyoko Karasawa, Yutaka Sakurai, Kohzou Harimoto, Masataka Ito
Purpose: High-mobility group box-1 (HMGB1) is a nonhistone DNA-binding nuclear protein released from necrotic cells, which is also secreted by activated leukocytes and acts as a primary proinflammatory cytokine. In this study, we compared vitreous HMGB1 levels in ocular sarcoidosis with those in noninflammatory vitreoretinal diseases and evaluated its association with Th cell-related and proinflammatory cytokines. Methods: The study group consisted of 24 patients with ocular sarcoidosis...
January 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28088526/subcutaneous-immunization-with-streptococcus-pneumoniae-gapdh-confers-effective-protection-in-mice-via-tlr2-and-tlr4
#9
Xiaoyu Sun, Jichao Wang, Jie Zhou, Hong Wang, Xiaofang Wang, Jingwen Wu, Yujuan He, Yibing Yin, Xuemei Zhang, Wenchun Xu
The surface localized Glyceraldehyde-3-phosphate dehydrogenase (GAPDH) of Streptococcus pneumoniae is best known as housekeeping protein. Currently, GAPDH has been recognized as moonlighting protein and virulent factor. Therefore, we investigate whether GAPDH can act as a suitable vaccine candidate protein to prevent pneumococcal infection. In this study, mice received subcutaneous vaccination with recombinant GAPDH followed by challenge with D39 and 19F showing higher survival rate and lower bacterial loads in nasal washes and lung homogenates than control...
January 12, 2017: Molecular Immunology
https://www.readbyqxmd.com/read/28077657/lmp1-and-lmp2a-collaborate-to-promote-epstein-barr-virus-ebv-induced-b-cell-lymphomas-in-a-cord-blood-humanized-mouse-model-but-are-not-essential
#10
Shi-Dong Ma, Ming-Han Tsai, James C Romero-Masters, Erik A Ranheim, Shane M Huebner, Jillian Bristol, Henri-Jacques Delecluse, Shannon C Kenney
: Epstein-Barr virus (EBV) infection is associated with B cell lymphomas in humans. The ability of EBV to convert human B cells into long-lived lymphoblastoid cell lines (LCLs) in vitro requires the collaborative effects of EBNA2 (which hijacks notch signaling), LMP1 (which mimics CD40 signaling), and EBNA 3A/3C (which inhibit oncogene-induced senescence and apoptosis). However, we recently showed that an LMP1-deleted EBV mutant induces B cell lymphomas in a newly developed cord blood-humanized mouse model that allows EBV-infected B cells to interact with CD4 T cells (the major source of CD40 ligand)...
January 11, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28070266/serum-and-cerebrospinal-fluid-immune-mediators-in-children-with-autistic-disorder-a-longitudinal-study
#11
Carlos A Pardo, Cristan A Farmer, Audrey Thurm, Fatma M Shebl, Jorjetta Ilieva, Simran Kalra, Susan Swedo
BACKGROUND: The causes of autism likely involve genetic and environmental factors that influence neurobiological changes and the neurological and behavioral features of the disorder. Immune factors and inflammation are hypothesized pathogenic influences, but have not been examined longitudinally. METHODS: In a cohort of 104 participants with autism, we performed an assessment of immune mediators such as cytokines, chemokines, or growth factors in serum and cerebrospinal fluid (n = 67) to determine potential influences of such mediators in autism...
2017: Molecular Autism
https://www.readbyqxmd.com/read/28062921/targeted-deletion-of-traf2-allows-immunosuppression-free-islet-allograft-survival-in-mice
#12
Jeanette E Villanueva, Stacey N Walters, Mitsuru Saito, Elisabeth K Malle, Nathan W Zammit, Katherine A Watson, Robert Brink, Nicole L La Gruta, Stephen I Alexander, Shane T Grey
AIMS/HYPOTHESIS: Administration of anti-CD40 ligand (CD40L) antibodies has been reported to allow long-term islet allograft survival in non-human primates without the need for exogenous immunosuppression. However, the use of anti-CD40L antibodies was associated with thromboembolic complications. Targeting downstream intracellular components shared between CD40 and other TNF family co-stimulatory molecules could bypass these complications. TNF receptor associated factor 2 (TRAF2) integrates multiple TNF receptor family signalling pathways that are critical for T cell activation and may be a central node of alloimmune responses...
January 6, 2017: Diabetologia
https://www.readbyqxmd.com/read/28062007/a-recombinant-fusion-protein-consisting-of-west-nile-virus-envelope-domain-iii-fused-in-frame-with-equine-cd40-ligand-induces-antiviral-immune-responses-in-horses
#13
Shiliang A Liu, Muzammel Haque, Brent Stanfield, Frank M Andrews, Alma A Roy, Konstantin G Kousoulas
West Nile Virus (WNV) is endemic in the US and causes severe neurologic disease in horses since its introduction in 1999. There is no effective pharmaceutical treatment for WNV infection rendering vaccination as the only approach to prevention and control of disease. The purpose of this study was to evaluate a recombinant vaccine containing domain III (DIII) of the WNV envelope glycoprotein with and without a natural adjuvant equine (CD40L) in producing virus neutralizing antibodies in horses. Serum IgG1 concentration in the groups of horses vaccinated with the DIII-CD40L+TiterMax and DIII-CD40L proteins were significantly increased (p<0...
January 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28012161/preferentially-expanding-v%C3%AE-1-%C3%AE-%C3%AE-t-cells-are-associated-with-protective-immunity-against-plasmodium-infection-in-mice
#14
Shin-Ichi Inoue, Mamoru Niikura, Hiroko Asahi, Yoichiro Iwakura, Yasushi Kawakami, Fumie Kobayashi
γδ T cells play a crucial role in controlling malaria parasites. Dendritic cell (DC) activation via CD40 ligand (CD40L)-CD40 signalling by γδ T cells induces protective immunity against the blood-stage Plasmodium berghei XAT (PbXAT) parasites in mice. However, it is unknown which γδ T-cell subset has an effector role and is required to control the Plasmodium infection. Here, using antibodies to deplete TCR Vγ1(+) cells, we saw that Vγ1(+) γδ T cells were important for the control of PbXAT infection...
December 24, 2016: European Journal of Immunology
https://www.readbyqxmd.com/read/28005579/spontaneous-activation-of-antigen-presenting-cells-by-genes-encoding-truncated-homo-oligomerizing-derivatives-of-cd40
#15
Noam Levin, Aviad Pato, Gal Cafri, Galit Eisenberg, Tamar Peretz, Alon Margalit, Michal Lotem, Gideon Gross
The interaction between the CD40 receptor on antigen-presenting cells (APCs) and its trimeric ligand on CD4 T cells is essential for the initiation and progression of the adaptive immune response. Here we undertook to endow CD40 with the capacity to trigger spontaneous APC activation through ligand-independent oligomerization. To this end we exploited the GCN4 yeast transcriptional activator, which contains a leucine zipper DNA-binding motif that induces homophilic interactions. We incorporated GCN4 variants forming homodimers, trimers, or tetramers at the intracellular domain of human and mouse CD40 and replaced the extracellular portion with peptide-β2m or other peptide tags...
February 2017: Journal of Immunotherapy
https://www.readbyqxmd.com/read/28001444/vitamin-d-receptor-expression-in-plasmablastic-lymphoma-and-myeloma-cells-confers-susceptibility-to-vitamin-d
#16
Duncan M Gascoyne, Linden Lyne, Hayley Spearman, Francesca M Buffa, Elizabeth J Soilleux, Alison H Banham
Plasmablastic B-cell malignancies include plasmablastic lymphoma and subsets of multiple myeloma and diffuse large B-cell lymphoma (DLBCL). These diseases can be difficult to diagnose and treat, and lack well-characterised cell line models. Here, immunophenotyping and FOXP1 expression profiling identified plasmablastic characteristics in DLBCL cell lines HLY-1 and SU-DHL-9, associated with CTNNAL1, HPGD, RORα, IGF1 and/or vitamin D receptor (VDR) transcription. We demonstrated VDR protein expression in primary plasmablastic tumour cells, and confirmed in cell lines expression of both VDR and the metabolic enzyme CYP27B1, which catalyses active vitamin D3 production...
December 21, 2016: Endocrinology
https://www.readbyqxmd.com/read/27998726/characterization-and-purification-of-neoplastic-cells-of-nodular-lymphocyte-predominant-hodgkin-lymphoma-from-lymph-nodes-by-flow-cytometry-and-flow-cytometric-cell-sorting
#17
Jonathan R Fromm, Anju Thomas, Brent L Wood
We report the flow cytometric (FC) identification and characterization of lymphocyte predominant (LP) cells from lymph nodes involved by nodular lymphocyte predominant Hodgkin lymphoma (NLPHL). First, we immunophenotyped the NLPHL cell line (DEV) confirming a germinal center immunophenotype, lack of expression of CD32 and CD58, and expression of CD54. Nineteen of 26 lymph nodes involved by NLPHL demonstrated a population with an LP immunophenotype (73%), which included expression of germinal center markers (CD75/Bcl-6-positive, CD32-weak/negative without CD10), a B-cell immunophenotype (CD19/CD20/CD40(+)), IgD and/or IgM expression (67%), and lack of programmed death-ligand 1/ligand 2...
December 17, 2016: American Journal of Pathology
https://www.readbyqxmd.com/read/27992360/chronic-kidney-disease-induces-inflammatory-cd40-monocyte-differentiation-via-homocysteine-elevation-and-dna-hypomethylation
#18
Jiyeon Yang, Pu Fang, Daohai Yu, Lixiao Zhang, Daqing Zhang, Xiaohua Jiang, William Y Yang, Teodoro Bottiglieri, Satya P Kunapuli, Jun Yu, Eric T Choi, Yong Ji, Xiaofeng Yang, Hong Wang
RATIONALE: Patients with chronic kidney disease (CKD) develop hyperhomocysteinemia and have a higher cardiovascular mortality than those without hyperhomocysteinemia by 10-fold. OBJECTIVE: We investigated monocyte differentiation in human CKD and cardiovascular disease (CVD). METHODS AND RESULTS: We identified CD40 as a CKD-related monocyte activation gene using CKD-monocyte -mRNA array analysis and classified CD40 monocyte (CD40(+)CD14(+)) as a stronger inflammatory subset than the intermediate monocyte (CD14(++)CD16(+)) subset...
November 11, 2016: Circulation Research
https://www.readbyqxmd.com/read/27989689/cd40-signaling-and-hepatic-steatosis-unanticipated-links
#19
Sébastien Lepreux, Julien Villeneuve, Antoine Dewitte, Annie M Bérard, Alexis Desmoulière, Jean Ripoche
Obesity predisposes to an increased risk of nonalcoholic fatty liver disease (NAFLD). Hepatic steatosis is the key pathological feature of NAFLD and has emerged as a metabolic disorder in which innate and adaptive arms of the immune response play a central role in disease pathogenesis. Recent studies have revealed unexpected relationships between CD40 signaling and hepatic steatosis in high fat diet rodent models. CD154, the ligand of CD40, is a mediator of inflammation and controls several critical events of innate and adaptive immune responses...
December 15, 2016: Clinics and Research in Hepatology and Gastroenterology
https://www.readbyqxmd.com/read/27987496/-detection-of-peripheral-follicular-helper-t-cells-in-rheumatoid-arthritis
#20
L M An, J Li, L L Ji, G T Li, Z L Zhang
OBJECTIVE: To detect cell frequency and surface markers of peripheral CD4(+)CXCR5+ follicular helper T (Tfh) cells and analyze the correlation between CD4(+)CXCR5(+)Tfh cells and rheumatoid arthritis (RA) disease activity. METHODS: Forty RA patients meeting the American College of Rheumatology classification criteria for RA and twenty healthy controls (HC) were included. The peripheral blood mononuclear cells and sera were collected. The expressions of CD4+CXCR5(+)Tfh cells (CXCR5, C-X-C chemokine receptor type 5) and inducible T cell costimulator (ICOS), programmed death 1 positive (PD-1), interleukin-21 receptor (IL-21R) and CD40 ligand (CD40L) positive on CD4(+)CXCR5(+)Tfh cells were analyzed by flow cytometry...
December 18, 2016: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
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