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https://www.readbyqxmd.com/read/29761388/isolation-and-identification-of-interstitial-macrophages-from-the-lungs-using-different-digestion-enzymes-and-staining-strategies
#1
Shaikh M Atif, Sophie L Gibbings, Claudia V Jakubzick
Interstitial macrophages (IMs) are present in multiple organs. Although there is limited knowledge of the unique functional role IM subtypes play, macrophages, in general, are known for their contribution in homeostatic tissue maintenance and inflammation such as clearing pathogens and debris and secreting inflammatory mediators and growth factors. IM subtypes have been identified in the heart, skin, and gut, and more recently we identified three distinct IMs in the lung. IMs express on their surface high levels of MerTK, CD64, and CD11b, with differences in CD11c, CD206, and MHC II expression, and referred to the three pulmonary IM subtypes as IM1 (CD11clo CD206+ MHCIIlo ), IM2 (CD11clo CD206+ MHCIIhi ), and IM3 (CD11chi CD206lo MHCIIhi )...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29743615/human-intestinal-pro-inflammatory-cd11c-high-ccr2-cx3cr1-macrophages-but-not-their-tolerogenic-cd11c-ccr2-cx3cr1-counterparts-are-expanded-in-inflammatory-bowel-disease
#2
D Bernardo, A C Marin, S Fernández-Tomé, A Montalban-Arques, A Carrasco, E Tristán, L Ortega-Moreno, I Mora-Gutiérrez, A Díaz-Guerra, R Caminero-Fernández, P Miranda, F Casals, M Caldas, M Jiménez, S Casabona, F De la Morena, M Esteve, C Santander, M Chaparro, J P Gisbert
Although macrophages (Mϕ) maintain intestinal immune homoeostasis, there is not much available information about their subset composition, phenotype and function in the human setting. Human intestinal Mϕ (CD45+ HLA-DR+ CD14+ CD64+ ) can be divided into subsets based on the expression of CD11c, CCR2 and CX3CR1. Monocyte-like cells can be identified as CD11chigh CCR2+ CX3CR1+ cells, a phenotype also shared by circulating CD14+ monocytes. On the contrary, their Mϕ-like tissue-resident counterparts display a CD11c- CCR2- CX3CR1- phenotype...
May 9, 2018: Mucosal Immunology
https://www.readbyqxmd.com/read/29721252/acute-monocytic-leukemia-diagnosed-by-flow-cytometry-includes-acute-myeloid-leukemias-with-weakly-or-faintly-positive-non-specific-esterase-staining
#3
Yuriko Zushi, Miho Sasaki, Ayano Mori, Toshiharu Saitoh, Takae Goka, Yumi Aoyama, Yuta Goto, Hiroko Tsunemine, Taiichi Kodaka, Takayuki Takahashi
A diagnosis of acute monocytic leukemia (AML-M5) based on α-naphthyl butyrate esterase (α-NB) staining has some problems, because AML-M5 leukemic cells often show weak or faint positivity on α-NB staining. In these situations, some cases of AML-M5 tend to be misdiagnosed as AML-M0. Therefore, we evaluated the significance of weak or faint α-NB staining in AML-M5 diagnosed by flow cytometry (FCM). Nineteen AML cases in which leukemic cells were negative for naphthol AS-D chloroacetate esterase staining were studied...
March 2, 2018: Hematology Reports
https://www.readbyqxmd.com/read/29720577/universal-monitoring-of-minimal-residual-disease-in-acute-myeloid-leukemia
#4
Elaine Coustan-Smith, Guangchun Song, Sheila Shurtleff, Allen Eng-Juh Yeoh, Wee Joo Chng, Siew Peng Chen, Jeffrey E Rubnitz, Ching-Hon Pui, James R Downing, Dario Campana
BACKGROUND: Optimal management of acute myeloid leukemia (AML) requires monitoring of treatment response, but minimal residual disease (MRD) may escape detection. We sought to identify distinctive features of AML cells for universal MRD monitoring. METHODS: We compared genome-wide gene expression of AML cells from 157 patients with that of normal myeloblasts. Markers encoded by aberrantly expressed genes, including some previously associated with leukemia stem cells, were studied by flow cytometry in 240 patients with AML and in nonleukemic myeloblasts from 63 bone marrow samples...
May 3, 2018: JCI Insight
https://www.readbyqxmd.com/read/29679380/a-non-myeloablative-chimeric-mouse-model-accurately-defines-microglia-and-macrophage-contribution-in-glioma
#5
Kenny Yu, A Saam Youshani, Fiona L Wilkinson, Claire O'Leary, Peter Cook, Liisi Laaniste, Aiyin Liao, Dominic Mosses, Christopher Waugh, Hannah Shorrock, Omar Pathmanaban, Andrew Macdonald, Ian Kamaly-Asl, Federico Roncaroli, Brian W Bigger
AIMS: Resident and peripherally-derived glioma associated microglia/macrophages (GAMM) play a key role in driving tumour progression, angiogenesis, invasion, and attenuating host immune responses. Differentiating these cells' origins is challenging and current pre-clinical models such as irradiation-based adoptive transfer, parabiosis and transgenic mice have limitations. We aimed to develop a novel non-myeloablative transplantation (NMT) mouse model that permits high levels of peripheral chimerism without blood-brain barrier (BBB) damage or brain infiltration prior to tumour implantation...
April 20, 2018: Neuropathology and Applied Neurobiology
https://www.readbyqxmd.com/read/29668526/immunophenotyping-of-monocytes-during-human-sepsis-shows-impairment-in-antigen-presentation-a-shift-toward-nonclassical-differentiation-and-upregulation-of-fc%C3%AE-ri-receptor
#6
Nadijane Valeria Ferreira da Mota, Milena Karina Colo Brunialti, Sidneia Sousa Santos, Flavia Ribeiro Machado, Murillo Assunçao, Luciano Cesar Pontes de Azevedo, Reinaldo Salomao
Monocytes and macrophages are pivotal in the host response to sepsis, recognizing the infecting microorganism and triggering an inflammatory response. These functions are, at least in part, modulated by the expression of cell surface receptors. We aimed to characterize the monocyte phenotype from septic patients during an ongoing sepsis process and its association with clinical outcomes. Sixty-one septic patients and 31 healthy volunteers (HVs) were enrolled in the study. Samples were obtained from patients at baseline (D0, N = 61), and after 7 (D7, N = 36) and 14 days of therapy (D14, N = 22)...
December 5, 2017: Shock
https://www.readbyqxmd.com/read/29599976/high-sensitivity-8-color-flow-cytometry-assay-for-paroxysmal-nocturnal-hemoglobinuria-granulocyte-and-monocyte-detections
#7
Ray Chun-Fai Chan, Richard H Leung, Albert Posadas, Thomas S Lorey, Allison J Shaw
Flow cytometry is the gold standard in diagnosis of paroxysmal nocturnal hemoglobinuria (PNH) by detecting the absence of glycol-phosphatidyl inositol (GPI)-linked protein expression on granulocyte and monocyte surfaces. However, the current assays are not optimized and require improvement, particularly in reducing background fluorescence and optimizing sensitivity and specificity. With more fluorochromes available and with advances in instrument engineering, rare populations may be identified with high sensitivity...
March 2018: Biomedical Reports
https://www.readbyqxmd.com/read/29575661/early-diagnosis-of-infection-occurs-in-burned-patients-and-verification-in-vitro
#8
M Zhang, L Yang, G Du, S Duan, D Liu, X Gao, D Li
OBJECTIVE: To explore the trend of CD64+ neutrophils being present in the peripheral blood of patients with burns and verification in vitro. METHOD: We isolated and purified CD64+ neutrophils from healthy people, stimulated cells with inactivated Staphylococcus aureus in vitro to make them proliferate and analyzed them with Modfit 2 analysis software. Patients with burns were divided into two groups, depending on whether there was a complicated infection or not, and 35 healthy participants were enrolled as blank group...
March 25, 2018: International Journal of Laboratory Hematology
https://www.readbyqxmd.com/read/29571741/immunobiologically-relevant-level-of-aflatoxin-b-1-alters-transcription-of-key-functional-immune-genes-phagocytosis-and-survival-of-human-dendritic-cells
#9
Jalil Mehrzad, Abbas Bahari, Mohammad Reza Bassami, Mahmoud Mahmoudi, Hesam Dehghani
The effects of naturally occurring levels of aflatoxin (AF) B1 on the expression of key molecules and function of dendritic cells (DCs) were investigated on human monocyte-derived DCs (MDDCs) by cell culture, RT-qPCR, and flow cytometry. An environmentally relevant level of AFB1 remarkably impaired the phagocytic capacity of MDDCs. Furthermore, AFB1 significantly affected the transcript levels of some key functional genes in MDDCs. It caused an up-regulation of key transcripts in cytochrome P450 (CYP) family, MyD88, NF-KB, TNF-α, TLR2, TLR4, COX-2, HLA-DR, CCR7, CD209, LFA3 and CD16...
March 20, 2018: Immunology Letters
https://www.readbyqxmd.com/read/29564463/multivariate-computational-analysis-of-biosensor-s-data-for-improved-cd64-quantification-for-sepsis-diagnosis
#10
U Hassan, R Zhu, R Bashir
Sepsis, as a leading cause of death worldwide, relies on systemic inflammatory response syndrome (SIRS) criteria for its diagnosis. SIRS is highly non-specific as it relies on monitoring of patients' vitals for sepsis diagnosis, which are known to change with many confounding factors. Changes in leukocyte counts and CD64 expression levels are known specific biomarkers of pro-inflammatory host response at the onset of sepsis. Recently, we have developed a biosensor chip that can enumerate the leukocyte counts and quantify the neutrophil CD64 expression levels from a drop of blood...
April 17, 2018: Lab on a Chip
https://www.readbyqxmd.com/read/29564138/a-pilot-study-on-the-usefulness-of-peripheral-blood-flow-cytometry-for-the-diagnosis-of-lower-risk-myelodysplastic-syndromes-the-mds-thermometer
#11
Ana Aires, Maria Dos Anjos Teixeira, Catarina Lau, Cláudia Moreira, Ana Spínola, Alexandra Mota, Inês Freitas, Jorge Coutinho, Margarida Lima
Background: Immunophenotypic analysis of the bone marrow (BM) cells has proven to be helpful in the diagnosis of Myelodysplastic Syndromes (MDS). However, the usefulness of flow cytometry (FCM) for the detection of myelodysplasia in the peripheral blood (PB) still needs to be investigated. The aim of this pilot study was to evaluate the value of FCM-based PB neutrophil and monocyte immunophenotyping for the diagnosis of lower risk MDS (LR-MDS). Methods: We evaluated by 8-color FCM the expression of multiple cell surface molecules (CD10, CD11b, CD11c, CD13, CD14, CD15, CD16, CD34, CD45, CD56, CD64 and HLA-DR) in PB neutrophils and monocytes from a series of 14 adult LR-MDS patients versus 14 normal individuals...
2018: BMC Hematology
https://www.readbyqxmd.com/read/29562615/distinct-properties-of-human-m-csf-and-gm-csf-monocyte-derived-macrophages-to-simulate-pathological-lung-conditions-in-vitro-application-to-systemic-and-inflammatory-disorders-with-pulmonary-involvement
#12
Alain Lescoat, Alice Ballerie, Yu Augagneur, Claudie Morzadec, Laurent Vernhet, Olivier Fardel, Patrick Jégo, Stéphane Jouneau, Valérie Lecureur
Macrophages play a central role in the pathogenesis of inflammatory and fibrotic lung diseases. However, alveolar macrophages (AM) are poorly available in humans to perform in vitro studies due to a limited access to broncho-alveolar lavage (BAL). In this study, to identify the best alternative in vitro model for human AM, we compared the phenotype of AM obtained from BAL of patients suffering from three lung diseases (lung cancers, sarcoidosis and Systemic Sclerosis (SSc)-associated interstitial lung disease) to human blood monocyte-derived macrophages (MDMs) differentiated with M-CSF or GM-CSF...
March 17, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29546878/inflammation-induces-two-types-of-inflammatory-dendritic-cells-in-inflamed-lymph-nodes
#13
Jiyoun Min, Dongchan Yang, Mirang Kim, Keeok Haam, Anji Yoo, Jae-Hoon Choi, Barbara U Schraml, Yong Sung Kim, Dongsup Kim, Suk-Jo Kang
The spatiotemporal regulation of immune cells in lymph nodes (LNs) is crucial for mounting protective T-cell responses, which are orchestrated by dendritic cells (DCs). However, it is unclear how the DC subsets are altered by the inflammatory milieu of LNs. Here, we show that the inflamed LNs of Listeria-infected mice are characterized by the clustering of neutrophils and monocytes and IFN-γ production. Significantly, the early inflammatory responses are coupled with the differentiation of not one, but two types of CD64+ CD11c+ MHCII+ inflammatory DCs...
March 16, 2018: Experimental & Molecular Medicine
https://www.readbyqxmd.com/read/29545790/potential-involvement-of-platelet-derived-microparticles-and-microparticles-forming-immune-complexes-during-monocyte-activation-in-patients-with-systemic-lupus-erythematosus
#14
Catalina Burbano, Juan Villar-Vesga, Janine Orejuela, Carlos Muñoz, Adriana Vanegas, Gloria Vásquez, Mauricio Rojas, Diana Castaño
Microparticles (MPs) are vesicles derived from the plasma membrane of different cells, are considered a source of circulating autoantigens, and can form immune complexes (MPs-ICs). The number of MPs and MPs-ICs increases in patients with systemic lupus erythematosus (SLE). MPs activate myeloid cells by inducing IL-6 and TNF-α in both SLE and other diseases. Therefore, we propose that the recognition of MPs-ICs by monocytes rather that MPs may define their phenotype and contribute to the inflammatory process in patients with SLE...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29540108/neutrophil-cd64-expression-procalcitonin-and-presepsin-are-useful-to-differentiate-infections-from-flares-in-sle-patients-with-sirs
#15
A Echeverri, J Naranjo-Escobar, I Posso-Osorio, D Aguirre-Valencia, D Zambrano, G L Castaño, J D Martínez, C A Cañas, G J Tobón
Background/Objective Differentiating systemic lupus erythematosus (SLE) activity from infections in febrile patients is difficult because of similar initial clinical presentation. The aim of this study is to evaluate the usefulness of a number of biomarkers for differentiating infections from activity in SLE patients admitted with systemic inflammatory response (SIRS). Methods Patients with SLE and SIRS admitted to the emergency room were included in this study. Measurements of different markers including procalcitonin, neutrophil CD64 expression and presepsin, were performed...
June 2018: Lupus
https://www.readbyqxmd.com/read/29522719/tsc1-controls-the-development-and-function-of-alveolar-macrophages
#16
Song Chen, Qiongmei Yang, Jingru Liu, Huifang Huang, Mingxia Shi, Xiaoming Feng
Alveolar macrophages (AMs) are pivotal for maintaining the lung homeostasis, but how the development and function of AMs regulated remains largely unknown. In the present study, we demonstrated that the number of AMs was controlled by the Tsc1 protein. Cd11c-specific deletion of Tsc1 caused inefficient transition from pre-AMs to AMs in lung, which led to a great reduction of AM population. Ablation of Tsc1 downregulated the expression of surface marker CD64 and SiglecF on AMs. We further showed that conditional knockout of Tsc1 led to enhanced proliferation and increased reactive oxygen species (ROS) production and phagocytosis in AMs...
April 6, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29513375/increased-salt-exposure-affects-both-lymphoid-and-myeloid-effector-functions-influencing-innate-associated-disease-but-not-t-cell-associated-autoimmunity
#17
Daniëlle Vaartjes, Kutty-Selva Nandakumar, Rikard Holmdahl, Bruno Raposo
High salt consumption has since long been associated with elevated blood pressure and cardiovascular disease. Recently, mouse studies suggested that a high dietary salt intake exacerbates the clinical manifestations of autoimmunity. Using naïve cells ex vivo after pre-exposure of mice to high salt intake, we showed that increased salt exposure affects the viability and effector functions of immune cells. CD4+ T-cells evidenced a pro-inflammatory phenotype characterized by increased secretion of IFNγ and IL-17A, when exposed to high salt concentrations in vitro...
March 7, 2018: Immunology
https://www.readbyqxmd.com/read/29511065/unveiling-skin-macrophage-dynamics-explains-both-tattoo-persistence-and-strenuous-removal
#18
Anna Baranska, Alaa Shawket, Mabel Jouve, Myriam Baratin, Camille Malosse, Odessa Voluzan, Thien-Phong Vu Manh, Frédéric Fiore, Marc Bajénoff, Philippe Benaroch, Marc Dalod, Marie Malissen, Sandrine Henri, Bernard Malissen
Here we describe a new mouse model that exploits the pattern of expression of the high-affinity IgG receptor (CD64) and allows diphtheria toxin (DT)-mediated ablation of tissue-resident macrophages and monocyte-derived cells. We found that the myeloid cells of the ear skin dermis are dominated by DT-sensitive, melanin-laden cells that have been missed in previous studies and correspond to macrophages that have ingested melanosomes from neighboring melanocytes. Those cells have been referred to as melanophages in humans...
April 2, 2018: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/29501750/mixed-phenotype-t-b-myeloid-extramedullary-blast-crisis-as-an-initial-presentation-of-chronic-myelogenous-leukemia
#19
Xin Qing, Annie Qing, Ping Ji, Samuel W French, Holli Mason
BACKGROUND: Chronic myelogenous leukemia (CML) is a myeloproliferative disorder characterized by the Philadelphia (Ph) chromosome generated by the reciprocal translocation t(9,22)(q34;q11). The natural progression of the disease follows a biphasic or triphasic course. Most cases of CML are diagnosed in the chronic phase. Extramedullary blast crisis rarely occurs during the course of CML, and is extremely rare as the initial presentation of CML. CASE PRESENTATION: Here, we report the case of a 32-year-old female with enlarged neck lymph nodes and fatigue...
April 2018: Experimental and Molecular Pathology
https://www.readbyqxmd.com/read/29490633/effect-of-surgery-and-radiotherapy-on-complete-blood-count-lymphocyte-subsets-and-inflammatory-response-in-patients-with-advanced-oral-cancer
#20
Tadej Dovšak, Alojz Ihan, Vojko Didanovič, Andrej Kansky, Miha Verdenik, Nataša Ihan Hren
BACKGROUND: The immune system has a known role in the aetiology, progression and final treatment outcome of oral squamous cell cancers. The aim of this study was to evaluate the influence of radical surgery and radiotherapy on advanced oral squamous cell carcinoma blood counts, lymphocyte subsets and levels of acute inflammatory response markers. METHODS: Blood samples were obtained from 56 patients 5 days before and 10 days after surgery, 30 days and 1 year after radiotherapy...
March 1, 2018: BMC Cancer
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