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https://www.readbyqxmd.com/read/29599976/high-sensitivity-8-color-flow-cytometry-assay-for-paroxysmal-nocturnal-hemoglobinuria-granulocyte-and-monocyte-detections
#1
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/29555686/brain-microvascular-endothelial-cells-exhibit-lower-activation-of-the-alternative-complement-pathway-than-glomerular-microvascular-endothelial-cells
#2
Sarah E Sartain, Nancy A Turner, Joel L Moake
Atypical hemolytic uremic syndrome (aHUS) and bone marrow transplantation-associated thrombotic microangiopathy (TA-TMA) are associated with excessive activation of the alternative complement pathway (AP) and with severe renal - and rarely, cerebral - microvascular damage. Here, we compared AP activation and regulation in human glomerular and brain microvascular endothelial cells (GMVECs and BMVECs, respectively) unstimulated or stimulated by the proinflammatory cytokine, tumor necrosis factor (TNF). Compared with GMVECs and under both experimental conditions, BMVECs had increased gene expression of the AP-related genes C3 , CFB , and C5 , and decreased expression of CFD This was associated with increased expression in BMVECs (relative to GMVECs) of the genes for surface and soluble regulatory molecules ( CD46 , THBD , CD55 , CFI , and CFH ) suppressing formation of the AP C3 and C5 convertases...
March 19, 2018: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29554589/conditional-gene-knockout-and-reconstitution-in-human-ipscs-with-an-inducible-cas9-system
#3
Mengyao Wu, Senquan Liu, Yongxing Gao, Hao Bai, Vasiliki Machairaki, Gang Li, Tong Chen, Linzhao Cheng
Precise genome editing in human induced pluripotent stem cells (iPSCs) significantly enhances our capability to use human iPSCs for disease modeling, drug testing and screening as well as investigation of human cell biology. In this study, we seek to achieve conditional expression of the CD55 gene in order to interrogate its functions. We used two human iPSC lines that have unique genotypes, and constructed an inducible Cas9 gene expression system that is integrated at the AAVS1 safe harbor site in the human genome...
March 10, 2018: Stem Cell Research
https://www.readbyqxmd.com/read/29503741/beyond-the-role-of-cd55-as-a-complement-component
#4
REVIEW
So Hee Dho, Jae Cheong Lim, Lark Kyun Kim
The complement is a part of the immune system that plays several roles in removing pathogens. Despite the importance of the complement system, the exact role of each component has been overlooked because the complement system was thought to be a nonspecific humoral immune mechanism that worked against pathogens. Decay-accelerating factor (DAF or CD55) is a known inhibitor of the complement system and has recently attracted substantial attention due to its role in various diseases, such as cancer, protein-losing enteropathy, and malaria...
February 2018: Immune Network
https://www.readbyqxmd.com/read/29486674/renal-involvement-in-paroxysmal-nocturnal-hemoglobinuria-an-update-on-clinical-features-pathophysiology-and-treatment
#5
Styliani I Kokoris, Eleni Gavriilaki, Aggeliki Miari, Αnthi Travlou, Elias Kyriakou, Achilles Anagnostopoulos, Elissavet Grouzi
OBJECTIVES: The present review summarizes the available knowledge regarding acute and chronic kidney dysfunction in patients with paroxysmal nocturnal hemoglobinuria (PNH) focusing on its clinical features, pathophysiology and treatment. METHODS: A thorough PubMed search was performed using as main keywords: 'paroxysmal nocturnal hemoglobinuria', 'acute kidney injury', 'chronic kidney disease' and 'eculizumab'. RESULTS: PNH's etiopathogenesis is based on acquired mutations that lead to the reduction or absence of CD55 and CD59 complement regulators, which are responsible for some of the disease's major clinical features, like intravascular hemolysis, cytopenias and thrombosis...
February 28, 2018: Hematology (Amsterdam, Netherlands)
https://www.readbyqxmd.com/read/29447841/crispr-cas9-generated-human-cd46-cd55-and-cd59-knockout-cell-lines-as-a-tool-for-complement-research
#6
Astrid J F Thielen, Iris M van Baarsen, Marlieke L Jongsma, Sacha Zeerleder, Robbert M Spaapen, Diana Wouters
BACKGROUND: To prevent unwanted complement activation and subsequent damage, complement activation must be tightly regulated on healthy host cells. Dysregulation of the complement system contributes to the pathology of diseases like Paroxysmal Nocturnal Hemoglobinuria and atypical Hemolytic Uremic Syndrome. To investigate complement regulator deficiencies, primary patient cells may be used, but access to patient cells may be limited and cells are heterogeneous between different patients...
February 12, 2018: Journal of Immunological Methods
https://www.readbyqxmd.com/read/29359453/strong-xenoprotective-function-by-single-copy-transgenes-placed-sequentially-at-a-permissive-locus
#7
Beate Rieblinger, Konrad Fischer, Alexander Kind, Benedikt S Saller, Wiebke Baars, Marion Schuster, Lelia Wolf-van Buerck, Andrea Schäffler, Tatiana Flisikowska, Mayuko Kurome, Valeri Zakhartchenko, Barbara Kessler, Krzysztof Flisikowski, Eckhard Wolf, Jochen Seissler, Reinhard Schwinzer, Angelika Schnieke
BACKGROUND: Multiple xenoprotective transgenes are best grouped at a single locus to avoid segregation during breeding and simplify production of donor animals. METHODS: We used transgene stacking to place a human CD55 transgene adjacent to a human heme oxygenase 1 construct at the porcine ROSA26 locus. A transgenic pig was analyzed by PCR, RT-PCR, droplet digital PCR, immunohistochemistry, immunofluorescence, and flow cytometry. Resistance to complement-mediated cell lysis and caspase 3/7 activation were determined in vitro...
March 2018: Xenotransplantation
https://www.readbyqxmd.com/read/29355143/value-of-cd16-cd66b-cd45-in-comparison-to-cd55-cd59-cd45-in-diagnosis-of-paroxysmal-nocturnal-haemoglobinuria-an-indian-experience
#8
Mrinalini Kotru, Rahul Sharma, Suman Kumar Pramanik, Abhishek Purohit, Gurmeet Singh, Avinash Kumar Singh, Deepti Muterja, Pravas Mishra, Tulika Seth, Seema Tyagi, Manoranjan Mahapatra, Hara Prasad Pati, Renu Saxena
BACKGROUND & OBJECTIVES: Diagnosis of paroxysmal nocturnal haemoglobinuria (PNH), a rare haematopoietic stem cell disorder, is challenging in patients with bone marrow failure (BMF) syndrome like aplastic anaemia (AA). This study was conducted with the aim to test the efficacy of the newly recommended markers viz. anti-CD16 and CD66b antibody over the existing anti-CD55 and CD59 antibody for PNH diagnosis in India. METHODS: This study was conducted on 193 suspected cases of PNH by flow cytometry using lyse wash technique to stain the granulocytes with CD16/CD66b and CD55/CD59...
September 2017: Indian Journal of Medical Research
https://www.readbyqxmd.com/read/29280536/screening-of-genes-involved-in-epithelial-mesenchymal-transition-and-differential-expression-of-complement-related-genes-induced-by-pax2-in-renal-tubules
#9
Xiu-Li Wang, Ling Hou, Cheng-Guang Zhao, Ying Tang, Bo Zhang, Jing-Ying Zhao, Yu-Bin Wu
AIM: The aim of the present study was to screen and verify downstream genes involved in the epithelial mesenchymal transition (EMT) induced by paired box 2 (PAX2) in NRK-52E cells. METHODS: NRK-52E cells were transfected with lentivirus carrying PAX2 gene or no-load virus respectively. Total RNA was isolated 72 h after transfection from PAX2-overexpressing cells and control cells. Isolated RNA was then hybridized with the Rat OneArray Plus expression profile chip...
December 27, 2017: Nephrology
https://www.readbyqxmd.com/read/29207601/dissecting-the-mechanisms-involved-in-anti-human-t-lymphocyte-immunoglobulin-atg-induced-tolerance-in-the-setting-of-allogeneic-stem-cell-transplantation-potential-implications-for-graft-versus-host-disease
#10
Katia Beider, David Naor, Valeria Voevoda, Olga Ostrovsky, Hanna Bitner, Evgenia Rosenberg, Nira Varda-Bloom, Victoria Marcu-Malina, Jonathan Canaani, Ivetta Danilesko, Avichai Shimoni, Arnon Nagler
Polyclonal anti-human thymocyte globulins (ATG) have been recently shown to significantly reduce the incidence of graft versus host disease (GVHD) post allogeneic stem cell transplantation (HSCT) from both sibling and unrelated donors. Induction of regulatory T cells has been suggested as one of the possible mechanisms. The aim of current study was to further characterize the T cell populations induced by ATG treatment and to delineate the mechanisms involved in ATG-induced tolerance. Phenotypic characterization revealed a significant increase in the expression of FoxP3, GITR, CD95, PD-1 and ICOS as well as the complement inhibitory molecules CD55, CD58 and CD59 on CD4+CD25+ T cells upon ATG treatment...
October 31, 2017: Oncotarget
https://www.readbyqxmd.com/read/29176322/differential-expression-profiles-of-the-transcriptome-in-breast-cancer-cell-lines-revealed-by-next-generation-sequencing
#11
Yu Shi, Peng Ye, Xinghua Long
BACKGROUND/AIMS: As MCF-7 and MDA-MB-231 cells are the typical cell lines of two clinical breast tumour subtypes, the aim of the present study was to elucidate the transcriptome differences between MCF-7 and MDA-MB-231 breast cancer cell lines. METHODS: The mRNA, miRNA (MicroRNA) and lncRNA (Long non-coding RNA) expression profiles were examined using NGS (next generation sequencing) instrument Illumina HiSeq-2500. GO (Gene Ontology) and KEGG (Kyoto Encyclopedia of Genes and Genomes) pathway analyses were performed to identify the biological functions of differentially expressed coding RNAs...
2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29158510/construction-of-developmental-lineage-relationships-in-the-mouse-mammary-gland-by-single-cell-rna-profiling
#12
Bhupinder Pal, Yunshun Chen, François Vaillant, Paul Jamieson, Lavinia Gordon, Anne C Rios, Stephen Wilcox, Naiyang Fu, Kevin He Liu, Felicity C Jackling, Melissa J Davis, Geoffrey J Lindeman, Gordon K Smyth, Jane E Visvader
The mammary epithelium comprises two primary cellular lineages, but the degree of heterogeneity within these compartments and their lineage relationships during development remain an open question. Here we report single-cell RNA profiling of mouse mammary epithelial cells spanning four developmental stages in the post-natal gland. Notably, the epithelium undergoes a large-scale shift in gene expression from a relatively homogeneous basal-like program in pre-puberty to distinct lineage-restricted programs in puberty...
November 20, 2017: Nature Communications
https://www.readbyqxmd.com/read/29143318/calcineurin-inhibitor-induced-complement-system-activation-via-erk1-2-signalling-is-inhibited-by-socs-3-in-human-renal-tubule-cells
#13
Beatrix Loeschenberger, Lea Niess, Reinhard Würzner, Hubert Schwelberger, Iris E Eder, Martin Puhr, Julia Guenther, Jakob Troppmair, Michael Rudnicki, Hannes Neuwirt
One factor that significantly contributes to renal allograft loss is chronic calcineurin inhibitor (CNI) nephrotoxicity (CIN). Among other factors, the complement (C-) system has been proposed to be involved CIN development. Hence, we investigated the impact of CNIs on intracellular signalling and the effects on the C-system in human renal tubule cells. In a qPCR array, CNI treatment upregulated C-factors and downregulated SOCS-3 and the complement inhibitors CD46 and CD55. Additionally, ERK1/-2 was required for these regulations...
February 2018: European Journal of Immunology
https://www.readbyqxmd.com/read/29119571/targeted-exome-sequencing-defines-novel-and-rare-variants-in-complex-blood-group-serology-cases-for-a-red-blood-cell-reference-laboratory-setting
#14
Elizna M Schoeman, Eileen V Roulis, Yew-Wah Liew, Jacqueline R Martin, Tanya Powley, Brett Wilson, Glenda M Millard, Eunike C McGowan, Genghis H Lopez, Helen O'Brien, Jennifer A Condon, Robert L Flower, Catherine A Hyland
BACKGROUND: We previously demonstrated that targeted exome sequencing accurately defined blood group genotypes for reference panel samples characterized by serology and single-nucleotide polymorphism (SNP) genotyping. Here we investigate the application of this approach to resolve problematic serology and SNP-typing cases. STUDY DESIGN AND METHODS: The TruSight One sequencing panel and MiSeq platform was used for sequencing. CLC Genomics Workbench software was used for data analysis of the blood group genes implicated in the serology and SNP-typing problem...
November 8, 2017: Transfusion
https://www.readbyqxmd.com/read/29039580/combination-of-oncolytic-adenovirus-and-luteolin-exerts-synergistic-antitumor-effects-in-colorectal-cancer-cells-and-a-mouse-model
#15
Boduan Xiao, Yun Qin, Chang Ying, Buyun Ma, Binrong Wang, Fei Long, Ruwei Wang, Ling Fang, Yigang Wang
In recent years, oncolytic viruses have attracted increasing interest due to their potent antitumor effects. Luteolin, a natural product, has additionally been observed to exhibit various pharmacological antitumor activities. Previously, a novel dual‑targeting oncolytic adenovirus, complement decay‑accelerating factor (CD55)‑tumor necrosis factor ligand superfamily member 10 (TRAIL), was constructed, which exhibited significant growth inhibitory effects in various types of tumor cell. The present study investigated whether the combination of luteolin and CD55‑TRAIL was able to exert a synergistic antitumor effect in colorectal carcinoma (CRC) cells...
December 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29037309/correlation-between-cellular-expression-of-complement-regulatory-proteins-with-depletion-and-repopulation-of-b-lymphocytes-in-peripheral-blood-of-patients-with-rheumatoid-arthritis-treated-with-rituximab
#16
Daniela Viecceli, Mariana Pires Garcia, Laiana Schneider, Ana Paula Alegretti, Cristiano Kohler Silva, André Lucas Ribeiro, Claiton Viegas Brenol, Ricardo Machado Xavier
OBJECTIVES: To correlate the basal expression of complement regulatory proteins (CRPs) CD55, CD59, CD35, and CD46 in B-lymphocytes from the peripheral blood of a cohort of 10 patients with rheumatoid arthritis (RA) initiating treatment with rituximab (RTX) with depletion and time repopulation of such cells. METHODS: Ten patients with RA received two infusions of 1g of RTX with an interval of 14 days. Immunophenotypic analysis for the detection of CD55, CD59, CD35, and CD46 on B-lymphocytes was carried out immediately before the first infusion...
September 2017: Revista Brasileira de Reumatologia
https://www.readbyqxmd.com/read/29020582/cd55-deficiency-and-protein-losing-enteropathy
#17
LETTER
Alina Kurolap, Orly Eshach-Adiv, Hagit N Baris
New England Journal of Medicine, Volume 377, Issue 15, Page 1499-1500, October 2017.
October 12, 2017: New England Journal of Medicine
https://www.readbyqxmd.com/read/29020581/cd55-deficiency-and-protein-losing-enteropathy
#18
LETTER
Ahmet Ozen, William A Comrie, Michael J Lenardo
No abstract text is available yet for this article.
October 12, 2017: New England Journal of Medicine
https://www.readbyqxmd.com/read/28977405/genome-scale-detection-of-positive-selection-in-nine-primates-predicts-human-virus-evolutionary-conflicts
#19
Robin van der Lee, Laurens Wiel, Teunis J P van Dam, Martijn A Huynen
Hotspots of rapid genome evolution hold clues about human adaptation. We present a comparative analysis of nine whole-genome sequenced primates to identify high-confidence targets of positive selection. We find strong statistical evidence for positive selection in 331 protein-coding genes (3%), pinpointing 934 adaptively evolving codons (0.014%). Our new procedure is stringent and reveals substantial artefacts (20% of initial predictions) that have inflated previous estimates. The final 331 positively selected genes (PSG) are strongly enriched for innate and adaptive immunity, secreted and cell membrane proteins (e...
October 13, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28963754/diminished-presentation-of-complement-regulatory-protein-cd55-on-red-blood-cells-from-patients-with-hereditary-haemolytic-anaemias
#20
A Loniewska-Lwowska, K Koza, E Mendek-Czajkowska, P Wieszczy, A Adamowicz-Salach, K Branicka, I Witos, A Sapala-Smoczynska, T Jackowska, J Fabijanska-Mitek
INTRODUCTION: Hereditary haemolytic anaemias (HHA) encompass a heterogeneous group of anaemias characterized by decreased red blood cell survival. The aim of this study was to evaluate the status of red blood cell (RBC) surface molecules known or previously proposed to participate in preventing premature RBC clearance, analysing erythrocytes from patients with two types of HHA: hereditary spherocytosis (HS) and microcytosis. MATERIAL/METHODS: Relative binding of five monoclonal antibodies (mAbs), anti-CD55, anti-CD59, anti-CD44, anti-CD47 and anti-CD58, was evaluated in erythrocytes of patients with HS and hereditary microcytosis, using flow cytometry...
September 30, 2017: International Journal of Laboratory Hematology
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