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monocytes subset

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https://www.readbyqxmd.com/read/28935758/scavenger-receptor-cd36-directs-nonclassical-monocyte-patrolling-along-the-endothelium-during-early-atherogenesis
#1
Paola M Marcovecchio, Graham D Thomas, Zbigniew Mikulski, Erik Ehinger, Karin A L Mueller, Amy Blatchley, Runpei Wu, Yury I Miller, Anh Tram Nguyen, Angela M Taylor, Coleen A McNamara, Klaus Ley, Catherine C Hedrick
OBJECTIVE: Nonclassical monocytes (NCM) function to maintain vascular homeostasis by crawling or patrolling along the vessel wall. This subset of monocytes responds to viruses, tumor cells, and other pathogens to aid in protection of the host. In this study, we wished to determine how early atherogenesis impacts NCM patrolling in the vasculature. APPROACH AND RESULTS: To study the role of NCM in early atherogenesis, we quantified the patrolling behaviors of NCM in ApoE(-/-) (apolipoprotein E) and C57BL/6J mice fed a Western diet...
September 21, 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/28935693/a-multidimensional-blood-stimulation-assay-reveals-immune-alterations-underlying-systemic-juvenile-idiopathic-arthritis
#2
Alma-Martina Cepika, Romain Banchereau, Elodie Segura, Marina Ohouo, Brandi Cantarel, Kristina Goller, Victoria Cantrell, Emily Ruchaud, Elizabeth Gatewood, Phuong Nguyen, Jinghua Gu, Esperanza Anguiano, Sandra Zurawski, Jeanine M Baisch, Marilynn Punaro, Nicole Baldwin, Gerlinde Obermoser, Karolina Palucka, Jacques Banchereau, Sebastian Amigorena, Virginia Pascual
The etiology of sporadic human chronic inflammatory diseases remains mostly unknown. To fill this gap, we developed a strategy that simultaneously integrates blood leukocyte responses to innate stimuli at the transcriptional, cellular, and secreted protein levels. When applied to systemic juvenile idiopathic arthritis (sJIA), an autoinflammatory disease of unknown etiology, this approach identified gene sets associated with specific cytokine environments and activated leukocyte subsets. During disease remission and off treatment, sJIA patients displayed dysregulated responses to TLR4, TLR8, and TLR7 stimulation...
September 21, 2017: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/28935038/bone-marrow-derived-tenascin-c-attenuates-cardiac-hypertrophy-by-controlling-inflammation
#3
Lei Song, Lai Wang, Fuqiang Li, Ada Yukht, Minghui Qin, Haley Ruther, Mingjie Yang, Aurelio Chaux, Prediman K Shah, Behrooz G Sharifi
BACKGROUND: Tenascin-C (TNC) is a highly conserved matricellular protein with a distinct expression pattern during development and disease. Remodeling of the left ventricle (LV) in response to pressure overload leads to the re-expression of the fetal gene program. OBJECTIVES: The aim of this study was to investigate the function of TNC in cardiac hypertrophy in response to pressure overload. METHODS: Pressure overload was induced in TNC knockout and wild-type mice by constricting their abdominal aorta or by infusion of angiotensin II...
September 26, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/28931756/monocyte-dysregulation-and-systemic-inflammation-during-pediatric-falciparum-malaria
#4
Katherine R Dobbs, Paula Embury, John Vulule, Peter S Odada, Bruce A Rosa, Makedonka Mitreva, James W Kazura, Arlene E Dent
BACKGROUND: Inflammation and monocytes are thought to be important to human malaria pathogenesis. However, the relationship of inflammation and various monocyte functions to acute malaria, recovery from acute malaria, and asymptomatic parasitemia in endemic populations is poorly understood. METHODS: We evaluated plasma cytokine levels, monocyte subsets, monocyte functional responses, and monocyte inflammatory transcriptional profiles of 1- to 10-year-old Kenyan children at the time of presentation with acute uncomplicated malaria and at recovery 6 weeks later; these results were compared with analogous data from asymptomatic children and adults in the same community...
September 21, 2017: JCI Insight
https://www.readbyqxmd.com/read/28927291/differentially-conserved-transcriptomic-response-to-adversity-related-to-self-rated-health-in-the-multi-ethnic-study-of-atherosclerosis
#5
Pia Riestra, Samson Y Gebreab, Yongmei Liu, Ana V Diez Roux, Rumana R Khan, Amadou Gaye, Ruihua Xu, S K Davis
Self-rated health (SRH) is considered a strong indicator of well-being and clinical health status and has been linked to inflammatory markers. The objective of this work was to examine how self-rated physical health (SRPH) and mental health (SRMH) influence the immune system through the regulation of a stress-related gene expression profile known as the 'conserved transcriptional response to adversity' (CTRA), which involves the up-regulation of pro-inflammatory genes and down-regulation of genes involved in type I interferon (IFN) response and antibody synthesis...
January 1, 2017: Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28922396/biochemical-and-immunological-characterization-of-a-novel-monoclonal-antibody-against-mouse-leukotriene-b4-receptor-1
#6
Fumiyuki Sasaki, Tomoaki Koga, Kazuko Saeki, Toshiaki Okuno, Saiko Kazuno, Tsutomu Fujimura, Yasuyuki Ohkawa, Takehiko Yokomizo
Leukotriene B4 (LTB4) receptor 1 (BLT1) is a G protein-coupled receptor expressed in various leukocyte subsets; however, the precise expression of mouse BLT1 (mBLT1) has not been reported because a mBLT1 monoclonal antibody (mAb) has not been available. In this study, we present the successful establishment of a hybridoma cell line (clone 7A8) that produces a high-affinity mAb for mBLT1 by direct immunization of BLT1-deficient mice with mBLT1-overexpressing cells. The specificity of clone 7A8 was confirmed using mBLT1-overexpressing cells and mouse peripheral blood leukocytes that endogenously express BLT1...
2017: PloS One
https://www.readbyqxmd.com/read/28919985/human-tumor-derived-exosomes-tex-regulate-treg-functions-via-cell-surface-signaling-rather-than-uptake-mechanisms
#7
Laurent Muller, Patricia Simms, Chang-Sook Hong, Michael I Nishimura, Edwin K Jackson, Simon C Watkins, Theresa L Whiteside
Tumor-derived exosomes (TEX) are ubiquitously present in the tumor microenvironment and plasma of cancer patients. TEX carry a cargo of multiple stimulatory and inhibitory molecules and deliver them to recipient cells, serving as a communication network for the tumor. The mechanisms TEX use for delivering messages to recipient cells were evaluated using PKH26-labeled TEX produced by cultured human tumor cells, exosomes produced by dendritic cells-derived exosomes (DEX), or exosomes isolated from plasma of cancer patients (EXO)...
2017: Oncoimmunology
https://www.readbyqxmd.com/read/28916184/role-of-the-il-12-il-35-balance-in-sj%C3%A3-gren-s-syndrome
#8
Olivier Fogel, Elodie Rivière, Raphaèle Seror, Gaetane Nocturne, Saida Boudaoud, Bineta Ly, Jacques-Eric Gottenberg, Véronique Le Guern, Jean-Jacques Dubost, Joanne Nititham, Kimberly E Taylor, Philippe Chanson, Philippe Dieudé, Lindsey A Criswell, Bernd Jagla, Alice Thai, Michael Mingueneau, Xavier Mariette, Corinne Miceli-Richard
BACKGROUND: An interferon (IFN) signature is involved in the pathogenesis of primary Sjögren's syndrome (pSS), but whether the signature is type 1 or 2 remains controversial. Mouse models and genetic studies suggested the involvement of T helper 1 and type 2 IFN pathways. Likewise, polymorphisms of interleukin 12A gene (IL-12A), which encodes for IL-12p35, have been associated with pSS. IL-12p35 subunit is shared by 2 heterodimers, IL-12 and IL-35. OBJECTIVE: To confirm the genetic association of IL-12A polymorphism and pSS and elucidate the involvement of the IL-12/IL-35 balance in pSS by functional studies...
September 12, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28913840/loss-of-regulatory-characteristics-in-cd4-cd25-hi-t-cells-induced-by-impaired-transforming-growth-factor-beta-secretion-in-pneumoconiosis
#9
Lu-Qin Bian, Ling Mao, Ying Bi, Shao-Wei Zhou, Zi-Dan Chen, Jun Wen, Jin Shi, Ling Wang
Pneumoconiosis is caused by the accumulation of airborne dust in the lung, which stimulates a progressive inflammatory response that ultimately results in lung fibrosis and respiratory failure. It is possible that regulatory cells in the immune system could function to suppress inflammation and possibly slow or reverse disease progression. However, results in this study suggest that in pneumoconiosis patients, the regulatory T cells (Tregs) and B cells are functionally impaired. First, we found that pneumoconiosis patients presented an upregulation of CD4(+) CD25(+) T cells compared to controls, whereas the CD4(+) CD25(+) and CD4(+) CD25(hi) T cells were enriched with Th1- and Th17-like cells but not Foxp3-expressing Treg cells and evidenced by significantly higher T-bet, interferon (IFN)-γ, and interleukin (IL)-17 expression but lower Foxp3 and transforming growth factor (TGF)-β expression...
September 15, 2017: APMIS: Acta Pathologica, Microbiologica, et Immunologica Scandinavica
https://www.readbyqxmd.com/read/28910953/-the-expression-and-association-of-cd14-hla-dr-low-myeloid-derived-suppressor-cell-like-cells-and-interleukin-1%C3%AE-in-ovarian-cancer
#10
H Y Wang, R Zhao, H Ren, M J Zou, J Zhang, Y Zhang
Objective: To analyze the percentage of CD14(+) HLA-DR(Low/-) myeloid-derived suppressor cell-like cell subtypes(MDSCs) and interleukin-1β(IL-1β) concentration in peripheral blood and ascites of ovarian cancer patients, and to explore their association with clinicopathological characteristics. Methods: Blood samples of 31 patients and ascites of 5 patients in Qilu Hospital of Shandong University from January 2016 to December 2016 were collected. Blood samples of 20 healthy volunteers with matched age were collected as control...
September 12, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28910354/differential-impact-of-the-dual-ccr2-ccr5-inhibitor-cenicriviroc-on-migration-of-monocyte-and-lymphocyte-subsets-in-acute-liver-injury
#11
Tobias Puengel, Oliver Krenkel, Marlene Kohlhepp, Eric Lefebvre, Tom Luedde, Christian Trautwein, Frank Tacke
A hallmark of acute hepatic injury is the recruitment of neutrophils, monocytes and lymphocytes, including natural killer (NK) or T cells, towards areas of inflammation. The recruitment of leukocytes from their reservoirs bone marrow or spleen into the liver is directed by chemokines such as CCL2 (for monocytes) and CCL5 (for lymphocytes). We herein elucidated the impact of chemokine receptor inhibition by the dual CCR2 and CCR5 inhibitor cenicriviroc (CVC) on the composition of myeloid and lymphoid immune cell populations in acute liver injury...
2017: PloS One
https://www.readbyqxmd.com/read/28900479/loss-of-tff1-promotes-pro-inflammatory-phenotype-with-increase-in-the-levels-of-ror%C3%AE-t-t-lymphocytes-and-il-17-in-mouse-gastric-neoplasia
#12
Mohammed Soutto, Mohamed Saleh, Mohamed S Arredouani, Blanca Piazuelo, Abbes Belkhiri, Wael El-Rifai
Background: TFF1 deficiency induces a mucosal pro-inflammatory phenotype that contributes to gastric tumorigenesis in mouse and human. Methods: We utilized the Tff1-KO mouse model to assess the impact of TFF1 loss on immune cells infiltration in the stomach. We used single cell suspension, flow cytometry, immunohistochemistry, and quantitative PCR (qPCR) assays. Results: The Tff1-KO gastric mucosa demonstrated high chronic inflammatory scores (score: 3-4) at age 2 months, which exacerbated at age 8 months (score: 4-6)...
2017: Journal of Cancer
https://www.readbyqxmd.com/read/28899983/regulatory-nk-cells-mediated-between-immunosuppressive-monocytes-and-dysfunctional-t-cells-in-chronic-hbv-infection
#13
Haijun Li, Naicui Zhai, Zhongfeng Wang, Hongxiao Song, Yang Yang, An Cui, Tianyang Li, Guangyi Wang, Junqi Niu, Ian Nicholas Crispe, Lishan Su, Zhengkun Tu
BACKGROUND AND AIMS: HBV infection represents a major health problem worldwide, but the immunological mechanisms by which HBV causes chronic persistent infection remain only partly understood. Recently, cell subsets with suppressive features have been recognised among monocytes and natural killer (NK) cells. Here we examine the effects of HBV on monocytes and NK cells. METHODS: Monocytes and NK cells derived from chronic HBV-infected patients and healthy controls were purified and characterised for phenotype, gene expression and cytokines secretion by flow cytometry, quantitative real-time (qRT)-PCR, ELISA and western blotting...
September 12, 2017: Gut
https://www.readbyqxmd.com/read/28890720/porcine-b-cell-subset-responses-to-toll-like-receptor-ligands
#14
Roman Othmar Braun, Sylvie Python, Artur Summerfield
Toll-like receptors (TLR) triggering of B cells are known to promote B cell expansion, differentiation of B cells into antibody-producing and memory cells, but the TLR responses of porcine B cells is poorly characterized. Therefore, this study investigated the response pattern of porcine B cell subsets to a large collection of TLR ligands and demonstrates that the TLR2 ligand Pam3Cys-SK4 and the TLR7/8 ligands gardiquimod and resiquimod are particularly efficient at inducing proliferation, CD25 and CCR7. This activation was also determined in B-cell subpopulations including a CD21(+)IgM(+) subset, an IgG(+) subset and two putative B1-like subsets, defined as CD21(-)IgM(high)CD11R1(+)CD11c(+)CD14(+) and CD21(-)IgM(high) CD11R1(-)CD11c(+)CD14(-) B cells...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28887808/comparison-of-reference-values-for-immune-recovery-between-event-free-patients-receiving-haploidentical-allografts-and-those-receiving-human-leukocyte-antigen-matched-sibling-donor-allografts
#15
Xuying Pei, Xiangyu Zhao, Yu Wang, Lanping Xu, Xiaohui Zhang, Kaiyan Liu, Yingjun Chang, Xiaojun Huang
To establish optimal reference values for recovered immune cell subsets, we prospectively investigated post-transplant immune reconstitution (IR) in 144 patients who received allogeneic stem cell transplantation (allo- SCT) and without showing any of the following events: poor graft function, grades II‒IV acute graft-versus-host disease (GVHD), serious chronic GVHD, serious bacterial infection, invasive fungal infection, or relapse or death in the first year after transplantation. IR was rapid in monocytes, intermediate in lymphocytes, CD3(+) Tcells, CD8(+) T cells, and CD19(+) B cells, and very slow in CD4(+) T cells in the entire patient cohort...
September 8, 2017: Frontiers of Medicine
https://www.readbyqxmd.com/read/28887441/hiv-1-mediated-insertional-activation-of-stat5b-and-bach2-trigger-viral-reservoir-in-t-regulatory-cells
#16
Daniela Cesana, Francesca R Santoni de Sio, Laura Rudilosso, Pierangela Gallina, Andrea Calabria, Stefano Beretta, Ivan Merelli, Elena Bruzzesi, Laura Passerini, Silvia Nozza, Elisa Vicenzi, Guido Poli, Silvia Gregori, Giuseppe Tambussi, Eugenio Montini
HIV-1 insertions targeting BACH2 or MLK2 are enriched and persist for decades in hematopoietic cells from patients under combination antiretroviral therapy. However, it is unclear how these insertions provide such selective advantage to infected cell clones. Here, we show that in 30/87 (34%) patients under combination antiretroviral therapy, BACH2, and STAT5B are activated by insertions triggering the formation of mRNAs that contain viral sequences fused by splicing to their first protein-coding exon. These chimeric mRNAs, predicted to express full-length proteins, are enriched in T regulatory and T central memory cells, but not in other T lymphocyte subsets or monocytes...
September 8, 2017: Nature Communications
https://www.readbyqxmd.com/read/28883436/pandemic-2009-h1n1-influenza-venus-reporter-virus-reveals-broad-diversity-of-mhc-class-ii-positive-antigen-bearing-cells-following-infection-in-vivo
#17
Anthony DiPiazza, Aitor Nogales, Nicholas Poulton, Patrick C Wilson, Luis Martínez-Sobrido, Andrea J Sant
Although it is well established that Influenza A virus infection is initiated in the respiratory tract, the sequence of events and the cell types that become infected or access viral antigens remains incompletely understood. In this report, we used a novel Influenza A/California/04/09 (H1N1) reporter virus that stably expresses the Venus fluorescent protein to identify antigen-bearing cells over time in a mouse model of infection using flow cytometry. These studies revealed that many hematopoietic cells, including subsets of monocytes, macrophages, dendritic cells, neutrophils and eosinophils acquire influenza antigen in the lungs early post-infection...
September 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28880378/leukocyte-and-plasma-activation-profiles-in-chronically-transfused-patients-with-a-history-of-allergic-reactions
#18
Magali J Fontaine, Hank Shih, Richard Schubert, Wendy Wong, Jennifer Andrews, Michael Jeng, Rabindra Tirouvanziam
BACKGROUND: Allergic transfusion reactions are drawbacks to the benefits of transfusion. Classically, allergic transfusion reactions depend on histamine release from mast cells or basophils, but other leukocyte subsets may also be important. Thus, we propose to better define the exact leukocyte subsets involved in allergic transfusion reactions. STUDY DESIGN AND METHODS: The overall objective of the current study was to compare the activation of specific peripheral blood leukocyte subsets (monocytes, neutrophils, eosinophils, and basophils) in a cohort of 13 patients who received chronic transfusions and had a history of allergic transfusion reactions compared with a control group of patients who received chronic transfusions and had no history of allergic transfusion reactions...
September 6, 2017: Transfusion
https://www.readbyqxmd.com/read/28878767/human-blood-cd1c-dendritic-cells-promote-th1-and-th17-effector-function-in-memory-cd4-t-cells
#19
Ingrid M Leal Rojas, Wai-Hong Mok, Frances E Pearson, Yoshihito Minoda, Tony J Kenna, Ross T Barnard, Kristen J Radford
Dendritic cells (DC) initiate the differentiation of CD4(+) helper T cells into effector cells including Th1 and Th17 responses that play an important role in inflammation and autoimmune disease pathogenesis. In mice, Th1 and Th17 responses are regulated by different conventional (c) DC subsets, with cDC1 being the main producers of IL-12p70 and inducers of Th1 responses, while cDC2 produce IL-23 to promote Th17 responses. The role that human DC subsets play in memory CD4(+) T cell activation is not known. This study investigated production of Th1 promoting cytokine IL-12p70, and Th17 promoting cytokines, IL-1β, IL-6, and IL-23, by human blood monocytes, CD1c(+) DC, CD141(+) DC, and plasmacytoid DC and examined their ability to induce Th1 and Th17 responses in memory CD4(+) T cells...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28878765/dyslipidemic-diet-induced-monocyte-priming-and-dysfunction-in-non-human-primates-is-triggered-by-elevated-plasma-cholesterol-and-accompanied-by-altered-histone-acetylation
#20
John D Short, Sina Tavakoli, Huynh Nga Nguyen, Ana Carrera, Chelbee Farnen, Laura A Cox, Reto Asmis
Monocytes and the recruitment of monocyte-derived macrophages into sites of inflammation play a key role in atherogenesis and other chronic inflammatory diseases linked to cardiometabolic syndrome and obesity. Previous studies from our group have shown that metabolic stress promotes monocyte priming, i.e., enhanced adhesion and accelerated chemotaxis of monocytes in response to chemokines, both in vitro and in dyslipidemic LDLR(-/-) mice. We also showed that metabolic stress-induced monocyte dysfunction is, at least to a large extent caused by the S-glutathionylation, inactivation, and subsequent degradation of mitogen-activated protein kinase phosphatase 1...
2017: Frontiers in Immunology
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