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https://www.readbyqxmd.com/read/29044327/generation-of-a-triple-fluorescent-mouse-strain-allows-a-dynamic-and-spatial-visualization-of-different-liver-phagocytes-in-vivo
#1
Brenda N Nakagaki, Maria A Freitas-Lopes, Érika Carvalho, Raquel Carvalho-Gontijo, Hortência M Castro-Oliveira, Rafael M Rezende, Denise C Cara, Mônica M Santos, Rodrigo Pestana Lopes, Bruna A David, Gustavo B Menezes
Resident and circulating immune cells have been extensively studied due to their almost ubiquitous role in cell biology. Despite their classification under the "immune cell department", it is becoming increasingly clear that these cells are involved in many different non-immune related phenomena, including fetus development, vascular formation, memory, social behavior and many other phenotypes. There is a huge potential in combining high-throughput assays - including flow cytometry and gene analysis - with in vivo imaging...
October 16, 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/29024334/intermediate-and-nonclassical-monocytes-show-heterogeneity-in-patients-with-different-types-of-acute-coronary-syndrome
#2
Math P G Leers, Chantal Stockem, Dianne Ackermans, Rinske Loeffen, Hugo Ten Cate, Johannes A Kragten, Kon-Siong G Jie
This study was performed to gain further insight in the heterogeneity of monocytes in the different categories of acute coronary syndrome (ACS), especially between patients with unstable angina pectoris, ST-elevation myocardial infarction (STEMI), and non-ST-elevation myocardial infarction (NSTEMI). For this purpose, blood samples were collected in the acute phase from patients presenting with an ACS. These samples were examined with multiparameter flow cytometry to identify the different monocyte subsets and to analyze the expression of monocyte-associated molecules...
October 11, 2017: Cytometry. Part A: the Journal of the International Society for Analytical Cytology
https://www.readbyqxmd.com/read/29017970/absence-of-microglial-cx3cr1-impairs-the-synaptic-integration-of-adult-born-hippocampal-granule-neurons
#3
M Bolós, J R Perea, J Terreros-Roncal, N Pallas-Bazarra, J Jurado-Arjona, J Ávila, M Llorens-Martín
Microglia are immune cells that play a crucial role in maintaining brain homeostasis. Among the mechanisms of communication between microglia and neurons, the CX3CL1/CX3CR1 axis exerts a central modulatory role. Animals lacking CX3CR1 microglial receptor (CX3CR1-/- mice) exhibit marked alterations not only in microglia but also in neurons located in various regions of the brain. Here we show that microglial depletion of CX3CR1 leads to the deficient synaptic integration of adult-born granule neurons in the dentate gyrus (DG), both at the afferent and efferent level...
October 7, 2017: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/29016630/association-between-kidney-function-and-genetic-polymorphisms-in-atherosclerotic-and-chronic-kidney-diseases-a-cross-sectional-study-in-japanese-male-workers
#4
Yoko Kubo, Takahiro Imaizumi, Masahiko Ando, Masahiro Nakatochi, Yoshinari Yasuda, Hiroyuki Honda, Yachiyo Kuwatsuka, Sawako Kato, Kyoko Kikuchi, Takaaki Kondo, Masamitsu Iwata, Toru Nakashima, Hiroshi Yasui, Hideki Takamatsu, Hiroshi Okajima, Yasuko Yoshida, Shoichi Maruyama
BACKGROUND: Several single nucleotide polymorphisms (SNPs) have been implicated in the predisposition to chronic kidney disease (CKD). Atherosclerotic disease is deeply involved in the incidence of CKD; however, whether SNPs related to arteriosclerosis are involved in CKD remains unclear. This study aimed to identify SNPs associated with CKD and to examine whether risk allele accumulation is associated with CKD. METHODS: We conducted a cross-sectional study using data of 4814 male workers to examine the association between estimated glomerular filtration rate (eGFR) and 59 candidate polymorphisms (17 CKD, 42 atherosclerotic diseases)...
2017: PloS One
https://www.readbyqxmd.com/read/28993515/nonclassical-monocytes-mediate-secondary-injury-neurocognitive-outcome-and-neutrophil-infiltration-after-traumatic-brain-injury
#5
Hadijat M Makinde, Carla M Cuda, Talia B Just, Harris R Perlman, Steven J Schwulst
Traumatic brain injury (TBI) results in rapid recruitment of leukocytes into the injured brain. Monocytes constitute a significant proportion of the initial infiltrate and have the potential to propagate secondary brain injury or generate an environment of repair and regeneration. Monocytes are a diverse population of cells (classical, intermediate, and nonclassical) with distinct functions, however, the recruitment order of these subpopulations to the injured brain largely remains unknown. Thus, we examined which monocyte subpopulations are required for the generation of early inflammatory infiltrate within the injured brain, and whether their depletion attenuates secondary injury or neurocognitive outcome...
October 9, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28986258/fractalkine-cx3cr1-axis-modulated-the-development-of-pancreatic-ductal-adenocarcinoma-via-jak-stat-signaling-pathway
#6
LiYa Huang, BinWu Ma, JunWen Ma, Feng Wang
Pancreatic ductal adenocarcinoma (PDAC) is a fatal malignancy with an estimated 5 year survival rate of approximately 5% of all stages combined. High potential of PDAC metastasis is a leading cause for high mortality and poor prognosis. The majority of patients present with distant metastasis at diagnosis. Fractalkine (FKN) is recognized as a chemokine and a specific ligand of CX3CR1. It has been reported that FKN/CX3CR1 system was upregulated in many types of solid tumors. However, role of FKN/CX3CR1 in PDAC development remains unclear...
October 3, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28978662/fractalkine-induces-angiogenic-potential-in-cx3cr1-expressing-monocytes
#7
Youngrok Park, Joon Lee, Jae-Yong Kwak, Kyoungmi Noh, Eunjung Yim, Hyun-Kyung Kim, Young June Kim, Hal E Broxmeyer, Jeong-A Kim
We report the unique role of CX3CL1 (or fractalkine) on CD11b(+) myelomonocytic cells expressing CX3CR1, the only known receptor for CX3CL1, in promoting blood perfusion recovery. In a mouse ischemic hind-limb model, CD11b(+)CX3CR1(+) cells migrated to ischemic femoral muscles through CX3CL1-mediated chemotaxis. CD11b(+)CX3CR1(+) macrophages isolated from ischemic tissues [tissue (T)-CD11b(+)CX3CR1(+)] of muscle exert a proangiogenic effect through platelet factor-4 (CXCL4; PF-4) production. PF-4 does not promote angiogenesis by itself but, instead, increases VEGF-mediated angiogenesis...
October 4, 2017: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/28973941/granulocyte-colony-stimulating-factor-g-csf-signaling-in-spinal-microglia-drives-visceral-sensitization-following-colitis
#8
Lilian Basso, Tamia K Lapointe, Mircea Iftinca, Candace Marsters, Morley D Hollenberg, Deborah M Kurrasch, Christophe Altier
Pain is a main symptom of inflammatory diseases and often persists beyond clinical remission. Although we have a good understanding of the mechanisms of sensitization at the periphery during inflammation, little is known about the mediators that drive central sensitization. Recent reports have identified hematopoietic colony-stimulating factors as important regulators of tumor- and nerve injury-associated pain. Using a mouse model of colitis, we identify the proinflammatory cytokine granulocyte-colony-stimulating factor (G-CSF or Csf-3) as a key mediator of visceral sensitization...
October 2, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28973548/correlation-of-peripheral-immunity-with-rapid-amyotrophic-lateral-sclerosis-progression
#9
Benjamin J Murdock, Tingting Zhou, Samy R Kashlan, Roderick J Little, Stephen A Goutman, Eva L Feldman
Importance: Amyotrophic lateral sclerosis (ALS) has an immune component, but previous human studies have not examined immune changes over time. Objectives: To assess peripheral inflammatory markers in participants with ALS and healthy control individuals and to track immune changes in ALS and determine whether these changes correlate with disease progression. Design, Setting, and Participants: In this longitudinal cohort study, leukocytes were isolated from peripheral blood samples from 35 controls and 119 participants with ALS at the ALS Clinic of the University of Michigan, Ann Arbor, from June 18, 2014, through May 26, 2016...
September 25, 2017: JAMA Neurology
https://www.readbyqxmd.com/read/28972094/cytomegalovirus-cmv-epitope-specific-cd4-t-cells-are-inflated-in-hiv-cmv-subjects
#10
Chike O Abana, Mark A Pilkinton, Silvana Gaudieri, Abha Chopra, Wyatt J McDonnell, Celestine Wanjalla, Louise Barnett, Rama Gangula, Cindy Hager, Dae K Jung, Brian G Engelhardt, Madan H Jagasia, Paul Klenerman, Elizabeth J Phillips, David M Koelle, Spyros A Kalams, Simon A Mallal
Select CMV epitopes drive life-long CD8(+) T cell memory inflation, but the extent of CD4 memory inflation is poorly studied. CD4(+) T cells specific for human CMV (HCMV) are elevated in HIV(+) HCMV(+) subjects. To determine whether HCMV epitope-specific CD4(+) T cell memory inflation occurs during HIV infection, we used HLA-DR7 (DRB1*07:01) tetramers loaded with the glycoprotein B DYSNTHSTRYV (DYS) epitope to characterize circulating CD4(+) T cells in coinfected HLA-DR7(+) long-term nonprogressor HIV subjects with undetectable HCMV plasma viremia...
October 2, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28971528/m2-polarization-of-monocytes-in-ankylosing-spondylitis-and-relationship-with-inflammation-and-structural-damage
#11
Jinzhu Zhao, Wei Yuan, Chunsheng Tao, Peifeng Sun, Zaixing Yang, Weidong Xu
The aim of this study was to evaluate the polarization of peripheral blood monocytes in the patients with ankylosing spondylitis (AS) and to determine the correlations between monocyte polarization and inflammation and structural damage. A total of 120 AS patients, 50 rheumatoid arthritis (RA) patients and 100 healthy controls were enrolled in the study. M1 (CD68+CD192+) and M2 (CX3CR1+CD163+) monocytes were characterized by flow cytometry. Demographic, clinical, radiographic and laboratory data were collected and analyzed...
October 3, 2017: APMIS: Acta Pathologica, Microbiologica, et Immunologica Scandinavica
https://www.readbyqxmd.com/read/28963556/il-17a-induces-heterogeneous-macrophages-and-it-does-not-alter-the-effects-of-lipopolysaccharides-on-macrophage-activation-in-the-skin-of-mice
#12
Kozo Nakai, Yu-Ying He, Fumiko Nishiyama, Fukiko Naruse, Reiji Haba, Yoshio Kushida, Naomi Katsuki, Tetsuya Moriue, Kozo Yoneda, Yasuo Kubota
Macrophages are central to inflammatory response and become polarized towards the M1 or M2 states upon activation by immunostimulants. In this study, we investigated the effects of lipopolysaccharides (LPS) and interleukin (IL)-17A on the activation of macrophages in in vivo mouse skin. We examined whether macrophages are activated in the skin of imiquimod (IMQ)-treated mice, a model for IL-17A-induced psoriasis-like skin inflammation, and flaky-tail (Flg (ft) ) mice, a model for IL-17A-induced chronic atopic dermatitis-like skin inflammation...
September 29, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28959183/foreign-body-response-to-intracortical-microelectrodes-is-not-altered-with-dip-coating-of-polyethylene-glycol-peg
#13
Heui C Lee, Janak Gaire, Seth W Currlin, Matthew D McDermott, Kinam Park, Kevin J Otto
Poly(ethylene glycol) (PEG) is a frequently used polymer for neural implants due to its biocompatible property. As a follow-up to our recent study that used PEG for stiffening flexible neural probes, we have evaluated the biological implications of using devices dip-coated with PEG for chronic neural implants. Mice (wild-type and CX3CR1-GFP) received bilateral implants within the sensorimotor cortex, one hemisphere with a PEG-coated probe and the other with a non-coated probe for 4 weeks. Quantitative analyses were performed using biomarkers for activated microglia/macrophages, astrocytes, blood-brain barrier leakage, and neuronal nuclei to determine the degree of foreign body response (FBR) resulting from the implanted microelectrodes...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28951447/experience-dependent-synaptic-plasticity-in-v1-occurs-without-microglial-cx3cr1
#14
Rachel W Schecter, Erin E Maher, Christina A Welsh, Beth Stevens, Alev Erisir, Mark F Bear
Brief monocular deprivation (MD) shifts ocular dominance (OD) and reduces the density of thalamic synapses in layer 4 of mouse primary visual cortex (V1). We found that microglial lysosome content is also increased as a result of MD. Previous studies have shown that the microglial fractalkine receptor CX3CR1 is involved in synaptic development and hippocampal plasticity. We therefore tested the hypothesis that neuron-to-microglial communication via CX3CR1 is an essential component of visual cortical development and plasticity in male mice...
September 26, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28943292/enhanced-fear-and-altered-neuronal-activation-in-forebrain-limbic-regions-of-cx3cr1-deficient-mice
#15
Inga Schubert, Rebecca Ahlbrand, Andrew Winter, Lauren Vollmer, Ian Lewkowich, Renu Sah
Mounting evidence supports immune dysfunction in psychiatric conditions such as post-traumatic stress disorder (PTSD). The association of immunomodulatory mechanisms with PTSD-relevant behavior and physiology is not well understood. Communication between neurons and microglia, resident immune cells of the central nervous system, is crucial for optimal regulation of behavior and physiology. In this regard, the fractalkine CX3CL1, secreted from neurons and its target, the microglial CX3CR1 receptor represent a primary neuron-microglia inter-regulatory system important for synaptic plasticity and function...
September 21, 2017: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/28935424/temporal-remodeling-of-pial-collaterals-and-functional-deficits-in-a-murine-model-of-ischemic-stroke
#16
Benjamin Okyere, Miranda Creasey, Yeonwoo Lebovitz, Michelle H Theus
BACKGROUND: Leptomeningeal anastomoses play a critical role in regulating reperfusion following cerebrovascular obstruction; however, methods to evaluate their temporospatial remodeling remains under investigation. NEW METHOD: We combined arteriole-specific vessel painting with histological evaluation to assess the density and diameter of inter-collateral vessels between the middle cerebral artery and anterior cerebral artery (MCA-ACA) or posterior cerebral artery (MCA-PCA) in a murine model of permanent middle cerebral artery occlusion (pMCAO)...
September 18, 2017: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/28923083/prevention-of-c5ar1-signaling-delays-microglial-inflammatory-polarization-favors-clearance-pathways-and-suppresses-cognitive-loss
#17
Michael X Hernandez, Shan Jiang, Tracy A Cole, Shu-Hui Chu, Maria I Fonseca, Melody J Fang, Lindsay A Hohsfield, Maria D Torres, Kim N Green, Rick A Wetsel, Ali Mortazavi, Andrea J Tenner
BACKGROUND: Pharmacologic inhibition of C5aR1, a receptor for the complement activation proinflammatory fragment, C5a, suppressed pathology and cognitive deficits in Alzheimer's disease (AD) mouse models. To validate that the effect of the antagonist was specifically via C5aR1 inhibition, mice lacking C5aR1 were generated and compared in behavior and pathology. In addition, since C5aR1 is primarily expressed on cells of the myeloid lineage, and only to a lesser extent on endothelial cells and neurons in brain, gene expression in microglia isolated from adult brain at multiple ages was compared across all genotypes...
September 18, 2017: Molecular Neurodegeneration
https://www.readbyqxmd.com/read/28912865/elevated-levels-of-soluble-fractalkine-and-increased-expression-of-cx3cr1-in-neuropsychiatric-systemic-lupus-erythematosus
#18
Ling Guo, Xiaoye Lu, Yuan Wang, Chunde Bao, Shunle Chen
The aim of the present study was to determine the levels of soluble fractalkine (sFKN) and expression of CX3CR1 in neuropsychiatric systemic lupus erythematosus (NPSLE). Disease activity of SLE was assessed using the SLE Disease Activity Index (SLEDAI). The mRNA expression levels of CX3CR1 and FKN were quantified using reverse transcription-quantitative polymerase chain reaction. Levels of sFKN in the serum and cerebrospinal fluid (CSF) were measured using enzyme-linked immunosorbent assays. The mRNA expression levels of CX3CR1 in peripheral blood mononuclear cells from patients with NPSLE, non-NPSLE and Behcet's disease were significantly higher than that of rheumatoid arthritis and healthy persons...
October 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28912710/key-aging-associated-alterations-in-primary-microglia-response-to-beta-amyloid-stimulation
#19
Cláudia Caldeira, Carolina Cunha, Ana R Vaz, Ana S Falcão, Andreia Barateiro, Elsa Seixas, Adelaide Fernandes, Dora Brites
Alzheimer's disease (AD) is characterized by a progressive cognitive decline and believed to be driven by the self-aggregation of amyloid-β (Aβ) peptide into oligomers and fibrils that accumulate as senile plaques. It is widely accepted that microglia-mediated inflammation is a significant contributor to disease pathogenesis; however, different microglia phenotypes were identified along AD progression and excessive Aβ production was shown to dysregulate cell function. As so, the contribution of microglia to AD pathogenesis remains to be elucidated...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/28903329/fractalkine-cx3cl1-induced-intercellular-adhesion-molecule-1-dependent-tumor-metastasis-through-the-cx3cr1-pi3k-akt-nf-%C3%AE%C2%BAb-pathway-in-human-osteosarcoma
#20
Ju-Fang Liu, Ya-Ting Tsao, Chun-Han Hou
Osteosarcoma is the most common primary bone tumor in children and teens. The exact molecular mechanism underlying osteosarcoma progression still remains unclear. The CX3CL1/fractalkine has been implicated in various tumors but not in osteosarcoma. This study is the first to show that fractalkine promotes osteosarcoma metastasis by promoting cell migration. Fractalkine expression was higher in osteosarcoma cell lines than in normal osteoblasts. Fractalkine induced cell migration by upregulating intercellular adhesion molecule-1 (ICAM-1) expression via CX3CR1/PI3K/Akt/NF-κB pathway in human osteosarcoma cells...
August 15, 2017: Oncotarget
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