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https://www.readbyqxmd.com/read/29237063/spectrum-of-pig-a-mutations-in-t-lymphocytes-of-rats-treated-with-procarbazine
#1
Javier Revollo, Javed A Bhalli, Cameron Tebbe, Jessica Noteboom, Demetria Thomas, Page McKinzie, Nicholas Felton, Mason G Pearce, Vasily N Dobrovolsky
Procarbazine is a primary component of antineoplastic combination chemotherapy often used for the treatment of Hodgkin's lymphoma. It is believed that cytostatic and cytotoxic properties of procarbazine are mediated via its interaction with genomic DNA. Procarbazine is a carcinogen in animal models; it is classified as Group 2A compound by IARC. Also it is known as an in vitro and in vivo mutagen and genotoxicant. However, the molecular mechanism by which procarbazine induces mutations is not thoroughly understood and the spectrum of procarbazine-induced in vivo mutations is described insufficiently...
December 8, 2017: Mutagenesis
https://www.readbyqxmd.com/read/29228713/cell-surface-thomsen-friedenreich-proteome-profiling-of-metastatic-prostate-cancer-cells-reveals-potential-link-with-cancer-stem-cell-like-phenotype
#2
Feng Li, Olga V Glinskii, Brian P Mooney, Kate Rittenhouse-Olson, Kenneth J Pienta, Vladislav V Glinsky
The tumor-associated Thomsen-Friedenreich glycoantigen (TF-Ag) plays an important role in hematogenous metastasis of multiple cancers. The LTQ Orbitrap LC-MS/MS mass spectrometry analysis of cell surface TF-Ag proteome of metastatic prostate cancer cells reveals that several cell surface glycoproteins expressing this carbohydrate antigen in prostate cancer (CD44, α2 integrin, β1 integrin, CD49f, CD133, CD59, EphA2, CD138, transferrin receptor, profilin) are either known as stem cell markers or control important cancer stem-like cell functions...
November 17, 2017: Oncotarget
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
#3
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/29167230/absence-of-cd59-in-guinea-pigs-analysis-of-the-cavia-porcellus-genome-suggests-the-evolution-of-a-cd59-pseudogene
#4
Hani Boshra, Wioleta M Zelek, Timothy R Hughes, Santiago Rodriguez de Cordoba, B Paul Morgan
CD59 is a membrane-bound regulatory protein that inhibits the assembly of the terminal membrane attack complex (C5b-9) of complement. From its original discovery in humans almost 30 years ago, CD59 has been characterized in a variety of species, from primates to early vertebrates, such as teleost fish. CD59 is ubiquitous in mammals; however, we have described circumstantial evidence suggesting that guinea pigs (Cavia porcellus) lack CD59, at least on erythrocytes. In this study, we have used a combination of phylogenetic analyses with syntenic alignment of mammalian CD59 genes to identify the only span of genomic DNA in C...
November 22, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29153978/the-endometria-of-women-with-endometriosis-exhibit-dysfunctional-expression-of-complement-regulatory-proteins-during-the-mid-secretory-phase
#5
Wilder A Palomino, Chandrakant Tayade, Felipe Argandoña, Luigi Devoto, Steven L Young, Bruce A Lessey
The control of complement activation within embryo-endometrium environment is critical for embryo survival. Cell evasion from complement attack requires interaction of complement regulatory proteins (CRPs) with cell adhesion αvβ3 integrin. We aim to compare the expression of CRPs in endometria of women with and without endometriosis and to examine the molecular interaction of decay accelerating factor (DAF) with αvβ3 integrin. Endometrial expression of Membrane cofactor protein (CD46), Decay accelerating factor (DAF), Membrane attack complex inhibitory factor (CD59) and β3 integrin subunit were determined through menstrual cycle by immunohistochemistry...
October 27, 2017: Journal of Reproductive Immunology
https://www.readbyqxmd.com/read/29149813/structural-analysis-of-cd59-of-chinese-tree-shrew-a-new-reference-molecule-for-human-immune-system-specific-cd59-drug-discovery
#6
Subhamay Panda, Leena Kumari, Santamay Panda
BACKGROUND: Chinese tree shrews (Tupaia belangeri chinensis) bear several characteristics that are considered to be very crucial for utilizing in animal experimental models in biomedical research. Subsequent to the identification of key aspects and signaling pathways in nervous and immune systems, it is revealed that tree shrews acquires shared common as well as unique characteristics, and hence offers a genetic basis for employing this animal as a prospective model for biomedical research...
November 17, 2017: Current Drug Discovery Technologies
https://www.readbyqxmd.com/read/29103517/stability-and-bioactivity-of-chitosan-as-a-transfection-agent-in-primary-human-cell-cultures-a-case-for-chitosan-only-controls
#7
Tanya L Cupino, Billy A Watson, Alan C Cupino, Keiji Oda, Mark G Ghamsary, Salvador Soriano, Wolff M Kirsch
Chitosan polymers (Cs), from which microparticles (CsM) may be precipitated to deliver various intracellular payloads, are generally considered biologically inert. We examined the impact of cell culture conditions on CsM size and the effect of chitosan on CD59 expression in primary human smooth muscle cells. We found that particle concentration and incubation time in biological buffers augmented particle size. Between pH 7.0 and pH 7.5, CsM size increased abruptly. We utilized CsM containing a plasmid with a gene for CD59 (pCsM) to transfect cells...
January 15, 2018: Carbohydrate Polymers
https://www.readbyqxmd.com/read/29100095/mutations-in-gpaa1-encoding-a-gpi-transamidase-complex-protein-cause-developmental-delay-epilepsy-cerebellar-atrophy-and-osteopenia
#8
Thi Tuyet Mai Nguyen, Yoshiko Murakami, Eamonn Sheridan, Sophie Ehresmann, Justine Rousseau, Anik St-Denis, Guoliang Chai, Norbert F Ajeawung, Laura Fairbrother, Tyler Reimschisel, Alexandra Bateman, Elizabeth Berry-Kravis, Fan Xia, Jessica Tardif, David A Parry, Clare V Logan, Christine Diggle, Christopher P Bennett, Louise Hattingh, Jill A Rosenfeld, Michael Scott Perry, Michael J Parker, Françoise Le Deist, Maha S Zaki, Erika Ignatius, Pirjo Isohanni, Tuula Lönnqvist, Christopher J Carroll, Colin A Johnson, Joseph G Gleeson, Taroh Kinoshita, Philippe M Campeau
Approximately one in every 200 mammalian proteins is anchored to the cell membrane through a glycosylphosphatidylinositol (GPI) anchor. These proteins play important roles notably in neurological development and function. To date, more than 20 genes have been implicated in the biogenesis of GPI-anchored proteins. GPAA1 (glycosylphosphatidylinositol anchor attachment 1) is an essential component of the transamidase complex along with PIGK, PIGS, PIGT, and PIGU (phosphatidylinositol-glycan biosynthesis classes K, S, T, and U, respectively)...
November 2, 2017: American Journal of Human Genetics
https://www.readbyqxmd.com/read/29096607/hypotonia-and-intellectual-disability-without-dysmorphic-features-in-a-patient-with-pign-related-disease
#9
Isabelle Thiffault, Britton Zuccarelli, Holly Welsh, Xuan Yuan, Emily Farrow, Lee Zellmer, Neil Miller, Sarah Soden, Ahmed Abdelmoity, Robert A Brodsky, Carol Saunders
BACKGROUND: Defects in the human glycosylphosphatidylinositol anchor biosynthetic pathway are associated with inherited glycosylphosphatidylinositol (GPI)-deficiencies characterized by a broad range of clinical phenotypes including multiple congenital anomalies, dysmorphic faces, developmental delay, hypotonia, and epilepsy. Biallelic variants in PIGN, encoding phosphatidylinositol-glycan biosynthesis class N have been recently associated with multiple congenital anomalies hypotonia seizure syndrome...
November 2, 2017: BMC Medical Genetics
https://www.readbyqxmd.com/read/29076186/a-regenerative-erythropoietic-response-does-not-increase-the-frequency-of-pig-a-mutant-reticulocytes-and-erythrocytes-in-sprague-dawley-rats
#10
John Nicolette, Joel Murray, Paul Sonders, Bruce Leroy
The in vivo rodent Pig-a mutation assay is a sensitive test to identify exposure to mutagenic substances, and has been proposed as an assay for the identification of impurities for pharmaceuticals. Red blood cells (RBCs) and reticulocytes (RETs) are analyzed by flow cytometry after exposure to potentially mutagenic chemicals for cells deficient in the cell surface anchored protein CD59, representing mutation in the X-linked Pig-a gene. The full potential of the assay as well as its limitations are currently being explored...
October 27, 2017: Environmental and Molecular Mutagenesis
https://www.readbyqxmd.com/read/29068273/cd59-association-with-infectious-bronchitis-virus-particles-protects-against-antibody-dependent-complement-mediated-lysis
#11
Yanquan Wei, Yanhong Ji, Huichen Guo, Xiaoying Zhi, Shichong Han, Yun Zhang, Yuan Gao, Yanyan Chang, Dan Yan, Kangyu Li, Ding Xiang Liu, Shiqi Sun
CD59 protein functions as a negative regulator of the terminal pathway of the complement system by binding to the C8/C9 factors. To date, little is known about the role of CD59 in coronavirus infectious bronchitis virus (IBV) infection. In this study, we discovered that CD59 was downregulated in IBV-infected cells and was associated with IBV virions. This association protected IBV particles from antibody-dependent complement-mediated lysis. IBV titres in the supernatant were significantly increased when CD59 proteins were overexpressed in cells followed by IBV infection, and this observation was further supported by knockdown or cleavage of CD59...
October 25, 2017: Journal of General Virology
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
#12
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/28963754/diminished-presentation-of-complement-regulatory-protein-cd55-on-red-blood-cells-from-patients-with-hereditary-haemolytic-anaemias
#13
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
https://www.readbyqxmd.com/read/28957817/altered-expression-pattern-of-cd55-and-cd59-on-red-blood-cells-in-anemia-of-chronic-kidney-disease
#14
Lama Al Faris, Salah Al-Humood, Fatma Behbehani, Husam Sallam
OBJECTIVE: To investigate the expression pattern of CD55 and CD59 on red blood cells (RBCs) in anemic chronic kidney disease (CKD) patients, and factors that might infleunce their expression. SUBJECTS AND METHODS: Nighty one adult anemic CKD patients and 80 healthy controls (HC) were enrolled. Anemic CKD patients were divided into 3 subgroups based on receiving erythropoietin (EPO) and renal replacement therapies (RRT). Flow cytometric analysis of CD55 and CD59 expression was performed on RBCs from blood samples obtained from CKD patients and HC...
September 28, 2017: Medical Principles and Practice: International Journal of the Kuwait University, Health Science Centre
https://www.readbyqxmd.com/read/28943429/shear-stress-mediated-changes-in-the-expression-of-complement-regulatory-protein-cd59-on-human-endothelial-progenitor-cells-by-ecm-integrin%C3%AE-v%C3%AE-3-f-actin-pathway-in%C3%A2-vitro
#15
Xiaodong Cui, Xiaoyun Zhang, Hongnan Bu, Na Liu, Hong Li, Xiumei Guan, Hong Yan, Yuzhen Wang, Hua Zhang, Yuzhen Ding, Min Cheng
Membrane regulatory proteins, such as CD46, CD55, and CD59, prevent excess complement activation and to protect cells from damage. Previous investigations confirmed that shear stress in the physiological range was more favorable for endothelial progenitor cells (EPCs) to repair injured vascular endothelial cells and operates mainly in atheroprotective actions. However, detailed events that contribute to shear stress-induced protection in EPCs, particularly the mechanisms of signal transduction, remain poorly understood...
December 9, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28940198/complement-regulatory-proteins-in-kidneys-of-patients-with-anti-neutrophil-cytoplasmic-antibody-anca-associated-vasculitis
#16
L Cheng, S-J Gou, H-Y Qiu, L Ma, P Fu
The complement system activation is involved in the development of anti-neutrophil cytoplasmic antibody-associated vasculitis (AAV). The study aimed to investigate the expression of complement regulatory proteins (CRPs) CD46, CD55 and CD59 in kidneys of 51 AVV patients. The expression of CD46, CD55 and CD59 in kidneys was detected by immunohistochemistry and double immunofluorescence staining. The immunohistochemical examination revealed that expression of the three CRPs could be detected in the glomeruli and tubules of both AAV patients and normal controls...
September 23, 2017: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/28928892/the-targeted-antitumor-effects-of-c-pc-cmc-cd59sp-nanoparticles-on-hela-cells-in-vitro-and-in-vivo
#17
Yujuan Wang, Liangqian Jiang, Qifeng Yin, Huihui Liu, Guoxiang Liu, Guoteng Zhu, Bing Li
The novel C-PC/CMC-CD59sp-NPs were made by carbocymethyl chitosan (CMC) loading C-phycocyanin (C-PC) with the lead of CD59 specific ligand peptide (CD59sp) for targeting, and the characteristics and targeted anti-tumor mechanism were explored in order to realize the targeted therapy of C-PC on the growth of HeLa cells both in vitro and vivo. The targeting nanoparticles were synthesized by ionic-gelation method, and the optimal condition was selected out by orthogonal analysis. The properties of nanoparticles were observed by laser particle analyzer and dynamic light scattering (DLS) and Fourier Transform Infrared Spectrometer (FTIR)...
2017: Journal of Cancer
https://www.readbyqxmd.com/read/28928834/cd55-and-cd59-expression-protects-her2-overexpressing-breast-cancer-cells-from-trastuzumab-induced-complement-dependent-cytotoxicity
#18
Yu Wang, Ya-Jun Yang, Zhu Wang, Juan Liao, Mei Liu, Xiao-Rong Zhong, Hong Zheng, Yan-Ping Wang
A large proportion (40-60%) of patients with human epidermal growth factor receptor 2 (HER2)-overexpressing breast cancer do not benefit from trastuzumab treatment, potentially due to the lack of complement-dependent cytotoxicity (CDC) activation. In the present study, the effect of complement decay-accelerating factor (CD55) and CD59 glycoprotein precursor (CD59) expression on trastuzumab-induced CDC in HER2-positive breast cancer cell lines was investigated. The CD55 and CD59-overexpressing and HER2-positive cell lines SK-BR-3 and BT474 were selected for subsequent experiments...
September 2017: Oncology Letters
https://www.readbyqxmd.com/read/28922377/c-reactive-protein-upregulates-the-whole-blood-expression-of-cd59-an-integrative-analysis
#19
Kaido Lepik, Tarmo Annilo, Viktorija Kukuškina, Kai Kisand, Zoltán Kutalik, Pärt Peterson, Hedi Peterson
Elevated C-reactive protein (CRP) concentrations in the blood are associated with acute and chronic infections and inflammation. Nevertheless, the functional role of increased CRP in multiple bacterial and viral infections as well as in chronic inflammatory diseases remains unclear. Here, we studied the relationship between CRP and gene expression levels in the blood in 491 individuals from the Estonian Biobank cohort, to elucidate the role of CRP in these inflammatory mechanisms. As a result, we identified a set of 1,614 genes associated with changes in CRP levels with a high proportion of interferon-stimulated genes...
September 2017: PLoS Computational Biology
https://www.readbyqxmd.com/read/28900819/a-homozygous-pigo-mutation-associated-with-severe-infantile-epileptic-encephalopathy-and-corpus-callosum-hypoplasia-but-normal-alkaline-phosphatase-levels
#20
Yoav Zehavi, Anja von Renesse, Etty Daniel-Spiegel, Yonatan Sapir, Luci Zalman, Ilana Chervinsky, Markus Schuelke, Rachel Straussberg, Ronen Spiegel
We describe two sisters from a consanguineous Arab family with global developmental delay, dystrophy, axial hypotonia, epileptic encephalopathy dominated by intractable complex partial seizures that were resistant to various anti-epileptic treatments. Dysmorphic features comprised low set ears, hypertelorism, upslanting palpebral fissures, a broad nasal bridge, and blue sclera with elongated eyelashes. Brain MRI in both children showed a corpus callosum hypoplasia that was evident already in utero and evolving cortical atrophy...
December 2017: Metabolic Brain Disease
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