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https://www.readbyqxmd.com/read/27913753/neutrophil-derived-microparticles-are-released-into-the-coronary-circulation-following-percutaneous-coronary-intervention-in-acute-coronary-syndromes
#1
Gonzalo J Martinez, Jennifer Y Barraclough, Shirley Nakhla, Vivian Kienzle, Stacy Robertson, Ziad Mallat, David S Celermajer, Sanjay Patel
AIMS: To evaluate (i) local coronary and systemic levels of microparticles (MP) in Acute Coronary Syndrome (ACS) and Stable Angina Pectoris (SAP) patients and (ii) their release after plaque disruption with percutaneous coronary intervention (PCI). BACKGROUND: Microparticles are small vesicles originating from plasma membranes of cells after activation or apoptosis and are implicated in the pathogenesis of atherosclerosis. Neutrophils play a role in plaque destabilisation and shed neutrophil-derived microparticles have the potential to drive significant pro-inflammatory and thrombotic downstream effects...
December 2, 2016: Bioscience Reports
https://www.readbyqxmd.com/read/27913426/depletion-of-circulating-monocytes-suppresses-il-17-and-hmgb1-expression-in-mice-with-lps-induced-acute-lung-injury
#2
Zhilong Jiang, Qianlin Zhou, Chenlin Gu, Dandan Li, Lei Zhu
Acute lung injury/Acute Respiratory distress syndrome (ALI/ARDS) is an important cause of mortality in critically ill patients. Macrophages play an important role in the pathogenesis of ALI/ARDS. To investigate the role and underlying mechanisms of circulating monocytes and resident alveolar macrophages (AMs) in ALI/ARDS, we depleted circulating monocytes and AMs by clodronate-loaded liposome (CL) in lipopolysaccharide (LPS)-induced ALI/ARDS mouse model. Our results indicated that depletion of circulating monocytes by intravenous (i...
December 2, 2016: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/27909225/recovery-of-the-immune-system-after-exercise
#3
Jonathan M Peake, Oliver Neubauer, Neil P Walsh, Richard J Simpson
The notion that prolonged, intense exercise causes an 'open window' of immunodepression during recovery after exercise is well accepted. Repeated exercise bouts or intensified training without sufficient recovery may increase the risk of illness. However, except for salivary IgA, clear and consistent markers of this immunodepression remain elusive. Exercise increases circulating neutrophil and monocyte counts, and reduces circulating lymphocyte count during recovery. This lymphopenia results from preferential egress of lymphocyte subtypes with potent effector functions (e...
December 1, 2016: Journal of Applied Physiology
https://www.readbyqxmd.com/read/27902946/social-regulation-of-the-lymph-node-transcriptome-in-rhesus-macaques-macaca-mulatta
#4
K Chun, J P Capitanio, D M Lamkin, E K Sloan, J M G Arevalo, S W Cole
Previous research has shown that adverse social conditions may promote a conserved transcriptional response to adversity (CTRA) involving up-regulation of proinflammatory gene expression and down-regulation of Type I interferon anti-viral genes in circulating blood cells. However, the impact of social conditions on lymphoid tissue gene regulation remains largely unexplored. This project assessed how social instability in adult male rhesus macaques (N=10, 5 in unstable, and 5 in stable social conditions) might regulate gene expression within secondary lymphoid tissue (lymph nodes; LN)...
November 14, 2016: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/27896824/patients-with-the-worst-outcomes-after-paracetamol-acetaminophen-induced-liver-failure-have-an-early-monocytopenia
#5
J K Moore, A C MacKinnon, T Y Man, J R Manning, S J Forbes, K J Simpson
BACKGROUND: Acute liver failure (ALF) is associated with significant morbidity and mortality. Studies have implicated the immune response, especially monocyte/macrophages as being important in dictating outcome. AIM: To investigate changes in the circulating monocytes and other immune cells serially in patients with ALF, relate these with cytokine concentrations, monocyte gene expression and patient outcome. METHODS: In a prospective case-control study in the Scottish Liver Transplant Unit, Royal Infirmary Edinburgh, 35 consecutive patients admitted with paracetamol-induced liver failure (POD-ALF), 10 patients with non-paracetamol causes of ALF and 16 controls were recruited...
November 28, 2016: Alimentary Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/27893741/downregulation-of-blood-monocyte-hla-dr-in-icu-patients-is-also-present-in-bone-marrow-cells
#6
Valérie Faivre, Anne-Claire Lukaszewicz, Didier Payen
BACKGROUND: The downregulation of blood monocyte HLA-DR expression also occurs in tissue infiltrative cells in a context of acute clinical inflammation, especially sepsis. This context favors the development of secondary infections and results from various mechanisms. Little is known about HLA-DR expression on bone marrow (BM) cells of the monocyte lineage, the source of circulating monocytes. This study analyzed the BM HLA-DR expression in ICU patients compared to BM monocytes from non-ICU patients and to blood monocytes of control healthy donors...
2016: PloS One
https://www.readbyqxmd.com/read/27886001/strategy-for-the-hemocompatibility-testing-of-microparticles
#7
S Braune, S Basu, K Kratz, J Bäckemo Johansson, M Reinthaler, A Lendlein, F Jung
Polymer-based microparticles are applied as non-thrombogenic or thrombogenic materials in a wide variety of intra- or extra-corporeal medical devices. As demanded by the regulatory agencies, the hemocompatibility of these blood contacting biomaterials has to be evaluated in vitro to ensure that the particle systems appropriately fulfill the envisioned function without causing undesired events such as thrombosis or inflammation. Currently described in vitro assays for hemocompatibility testing of particles comprise tests with different single cell types (e...
November 23, 2016: Clinical Hemorheology and Microcirculation
https://www.readbyqxmd.com/read/27885671/recruited-monocytic-myeloid-derived-suppressor-cells-promote-the-arrest-of-tumor-cells-in-the-premetastatic-niche-through-an-il-1%C3%AE-mediated-increase-in-e-selectin-expression
#8
Huifang Shi, Juechao Zhang, Xiaoqing Han, Huihan Li, Mingshu Xie, Yingying Sun, Wenguang Liu, Xueqing Ba, Xianlu Zeng
The tumor premetastatic niche initiated by primary tumors is constructed by multiple molecular factors and cellular components and provides permissive condition that allows circulating tumor cells to successfully metastasize. Myeloid-derived suppressor cells (MDSCs), a population of immature cells in pathological conditions, play a critical role in the formation of the premetastatic niche. However, few researches are focused on the function of monocytic MDSCs (mo-MDSCs), a subtype of MDSCs, in the construction of the niche...
November 25, 2016: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/27871915/inhibition-of-siglec-1-by-lentivirus-mediated-small-interfering-rna-attenuates-atherogenesis-in-apoe-deficient-mice
#9
Yi-Song Xiong, Ai-Lin Wu, Dong Mu, Juan Yu, Ping Zeng, Yi Sun, Jie Xiong
BACKGROUND: Siglec-1 is highly expressed on circulating monocytes and plaque macrophages in atherosclerotic patients, but the exact role of Siglec-1 in atherosclerosis has not been elucidated. METHODS: Lentiviral vector containing small interfering RNA targeting Siglec-1 (Lv-shSiglec-1) or control vector (Lv-shNC) were injected intravenously into 6-week old Apoe(-/-) mice. Then onset of atherosclerosis was observed. RESULTS: Siglec-1 was highly expressed in aortic plaques and it can be down-regulated by Lv-shSiglec-1 injection...
November 15, 2016: Clinical Immunology: the Official Journal of the Clinical Immunology Society
https://www.readbyqxmd.com/read/27866224/the-beneficial-effects-of-empagliflozin-an-sglt2-inhibitor-on-atherosclerosis-in-apoe-mice-fed-a-western-diet
#10
Ji Hye Han, Tae Jung Oh, Ghayoung Lee, Hyo Jin Maeng, Dong Hwa Lee, Kyoung Min Kim, Sung Hee Choi, Hak Chul Jang, Hye Seung Lee, Kyong Soo Park, Young-Bum Kim, Soo Lim
AIMS/HYPOTHESIS: A recent large clinical study has shown that empagliflozin has a lower rate of cardiovascular and all-cause mortality when compared with placebo in patients with type 2 diabetes. We investigated the effect of empagliflozin (compared with glimepiride) on the progression of atherosclerosis, and its possible mechanisms of action. METHODS: Forty-eight 5-week-old male ApoE (-/-) mice were fed a western diet for 20 weeks and divided into four groups: control (saline, 154 mmol/l NaCl), glimepiride 0...
November 19, 2016: Diabetologia
https://www.readbyqxmd.com/read/27863540/comparison-of-serum-cytokine-levels-between-dogs-with-multicentric-lymphoma-and-healthy-dogs
#11
Jerome Calvalido, Geoffrey A Wood, Anthony J Mutsaers, Darren Wood, William Sears, J Paul Woods
In humans, multiple cytokines have been linked to the development of lymphoma, and are relevant biomarkers for response to chemotherapy and prognosis. In contrast, only a few circulating cytokines have been studied in dogs with lymphoma. We prospectively enrolled thirty-one dogs newly diagnosed with multicentric lymphoma. Immunophenotype was determined by flow cytometry in all dogs, separating them into 2 subgroups: B cell lymphoma (n=21) and T cell lymphoma (n=10). Nineteen healthy dogs were enrolled in the control group...
December 2016: Veterinary Immunology and Immunopathology
https://www.readbyqxmd.com/read/27859785/increased-monocyte-derived-reactive-oxygen-species-in-type-2-diabetes-role-of-endoplasmic-reticulum-stress
#12
Robert M Restaino, Shekhar H Deo, Alan R Parrish, Paul J Fadel, Jaume Padilla
Recent evidence suggests that exposure of human monocytes to glucolipotoxic media to mimic the composition of plasma of patients with type 2 diabetes (T2D) results in the induction of endoplasmic reticulum stress markers and formation of reactive oxygen species (ROS). The extent to which these findings translate to patients with T2D remains unclear. Thus, we first measured ROS (dihydroethidium fluorescence) in peripheral blood mononuclear cells (PBMCs) from whole blood of T2D patients (n = 8) and compared to age matched healthy controls (n = 8)...
November 18, 2016: Experimental Physiology
https://www.readbyqxmd.com/read/27856455/map3k8-modulates-monocyte-state-and-atherogenesis-in-apoe-mice
#13
Carlos Sanz-Garcia, Ángela Sánchez, Constanza Contreras-Jurado, Carmela Cales, Cristina Barranquero, Marta Muñóz, Ramón Merino, Paula Escudero, Maria-Jesús Sanz, Jesús Osada, Ana Aranda, Susana Alemany
OBJECTIVE: Map3k8 (Cot/Tpl2) activates the MKK1/2-ERK1/2, MAPK pathway downstream from interleukin-1R, tumor necrosis factor-αR, NOD-2R, adiponectinR, and Toll-like receptors. Map3k8 plays a key role in innate and adaptive immunity and influences inflammatory processes by modulating the functions of different cell types. However, its role in atherogenesis remains unknown. In this study, we analyzed the role of this kinase in this pathology. APPROACH AND RESULTS: We show here that Map3k8 deficiency results in smaller numbers of Ly6C(high)CD11c(low) and Ly6C(low)CD11c(high) monocytes in ApoE(-)(/-) mice fed a high-fat diet (HFD)...
November 17, 2016: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/27855336/targeting-distinct-myeloid-cell-populations-in%C3%A2-vivo-using-polymers-liposomes-and-microbubbles
#14
Can Ergen, Felix Heymann, Wa'el Al Rawashdeh, Felix Gremse, Matthias Bartneck, Ulf Panzer, Robert Pola, Michal Pechar, Gert Storm, Nicole Mohr, Matthias Barz, Rudolf Zentel, Fabian Kiessling, Christian Trautwein, Twan Lammers, Frank Tacke
Identifying intended or accidental cellular targets for drug delivery systems is highly relevant for evaluating therapeutic and toxic effects. However, limited knowledge exists on the distribution of nano- and micrometer-sized carrier systems at the cellular level in different organs. We hypothesized that clinically relevant carrier materials, differing in composition and size, are able to target distinct myeloid cell subsets that control inflammatory processes, such as macrophages, neutrophils, monocytes and dendritic cells...
November 9, 2016: Biomaterials
https://www.readbyqxmd.com/read/27852031/increasing-the-efficacy-of-radiotherapy-by-modulating-the-ccr2-ccr5-chemokine-axes
#15
Kelli A Connolly, Brian A Belt, Nathania M Figueroa, Aditi Murthy, Ankit Patel, Minsoo Kim, Edith M Lord, David C Linehan, Scott A Gerber
Although radiotherapy (RT) is widely used to control tumor growth across many cancer types, there is a relatively high incidence of RT failure exhibited by tumor recurrence, therefore a clear need exists to achieve improved effectiveness of RT. The RT-elicited immune response largely impacts the efficacy of RT and includes immune cells that kill tumor cells, but also immunosuppressive cells, which dampen anti-tumor immunity. Using murine models in which syngeneic tumor cell lines (Colon38, Glioma261, Line1) are grown intramuscularly and treated with 15 Gy local RT, we assessed the effects of RT on both the systemic and intratumoral immune response...
November 11, 2016: Oncotarget
https://www.readbyqxmd.com/read/27835035/the-effect-of-healthy-pregnant-plasma-and-preeclamptic-plasma-on-the-phagocytosis-index-of-neutrophil-granulocytes-and-monocytes-of-nonpregnant-women
#16
Rudolf Lampé, Ágnes Kövér, Sándor Szűcs, László Pál, Ervin Árnyas, Robert Póka
OBJECTIVE: Phagocyte function of neutrophil granulocytes and monocytes is decreased in healthy pregnancy and further decreased in preeclampsia. The cause of the declined function is unknown. Decreased phagocyte function can lead to the higher infection rate in healthy pregnancy and may also be responsible for the increased susceptibility to infections and high trophoblast concentration in preeclampsia. The aim of this study is to examine the phagocyte function of neutrophil granulocytes and monocytes...
November 11, 2016: Hypertension in Pregnancy
https://www.readbyqxmd.com/read/27832642/cell-derived-microparticles-in-patients-with-type-2-diabetes-mellitus-a-systematic-review-and-meta-analysis
#17
Sheyu Li, Jia Wei, Chenghui Zhang, Xiaodan Li, Wentong Meng, Xianming Mo, Qianying Zhang, Qilin Liu, Kaiyun Ren, Rong Du, Haoming Tian, Jianwei Li
BACKGROUND/AIMS: The aim of this study was to assess the association between circulating cell-derived microparticles (MPs) and type 2 diabetes mellitus (T2DM). METHODS: A literature search was performed systematically in PubMed and Embase to identify available case-control or cross-sectional studies that compared different types of cell-derived MPs in patients with T2DM and non-diabetic controls. Pooled standardized mean differences (SMDs) of each MP type were pooled using meta-analysis...
2016: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/27830011/catalpol-ameliorates-diabetic-atherosclerosis-in-diabetic-rabbits
#18
Jiang-Yue Liu, Chen-Zhao Zheng, Xin-Ping Hao, Dai-Juan Zhang, An-Wei Mao, Ping Yuan
Catalpol, isolated from the roots of Rehmanniaglutinosa, Chinese foxglove, is an iridoid glycoside with antioxidant, anti-inflammatory and anti-hyperglycemic agent. The present study was to investigate the effects of catalpol on diabetic atherosclerosis in alloxan-induced diabetic rabbits. Diabetes was induced in rabbits by a hyperlipidemic diet and intravenous injection of alloxan (100 mg/kg). Rabbits were treated for 12 weeks. The fasting blood glucose, insulin, homeostasis model of insulin resistance, total cholesterol and triglyceride were measured...
2016: American Journal of Translational Research
https://www.readbyqxmd.com/read/27828999/cxcl4-and-cxcl4l1-differentially-affect-monocyte-survival-and-dendritic-cell-differentiation-and-phagocytosis
#19
Mieke Gouwy, Pieter Ruytinx, Egle Radice, Federico Claudi, Katrien Van Raemdonck, Raffaella Bonecchi, Massimo Locati, Sofie Struyf
Upon inflammation, circulating monocytes leave the bloodstream and migrate into the tissues, where they differentiate after exposure to various growth factors, cytokines or infectious agents. The best defined macrophage polarization types are M1 and M2. However, the platelet-derived CXC chemokine CXCL4 induces the polarization of macrophages into a unique phenotype. In this study, we compared the effect of CXCL4 and its variant CXCL4L1 on the differentiation of monocytes into macrophages and into immature monocyte-derived dendritic cells (iMDDC)...
2016: PloS One
https://www.readbyqxmd.com/read/27826792/monocyte-behaviour-and-tissue-transglutaminase-expression-during-experimental-autoimmune-encephalomyelitis-in-transgenic-cx3cr1-gfp-gfp-mice
#20
Navina L Chrobok, Alexandre Jaouen, Keith K Fenrich, John G J M Bol, Micha M M Wilhelmus, Benjamin Drukarch, Franck Debarbieux, Anne-Marie van Dam
Leukocyte infiltration into the central nervous system (CNS) is a key pathological feature in multiple sclerosis (MS) and the MS animal model experimental autoimmune encephalomyelitis (EAE). Recently, preventing leukocyte influx into the CNS of MS patients is the main target of MS therapies and insight into cell behaviour in the circulation is needed for further elucidation of such therapies. In this study, we aimed at in vivo visualization of monocytes in a time-dependent manner during EAE. Using intravital two-photon microscopy (IVM), we imaged CX3CR1(gfp/gfp) mice during EAE, visualizing CX3CR1-GFP(+) monocytes and their dynamics in the spinal cord vasculature...
November 9, 2016: Amino Acids
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