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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
#1
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/28977405/genome-scale-detection-of-positive-selection-in-nine-primates-predicts-human-virus-evolutionary-conflicts
#2
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...
August 11, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28971731/absence-of-measles-virus-detection-from-stapes-of-patients-with-otosclerosis
#3
María de Lourdes Flores-García, Claudia Adriana Colín-Castro, Mario Sabas Hernández-Palestina, Roberto Sánchez-Larios, Rafael Franco-Cendejas
Objective To determine molecularly the presence of measles virus genetic material in the stapes of patients with otosclerosis. Study Design A cross-sectional study. Setting A tertiary referral hospital. Subjects and Methods Genetic material was extracted from the stapes of patients with otosclerosis (n = 93) during the period from March 2011 to April 2012. The presence of viral measles sequences was evaluated by the real-time reverse transcriptase polymerase chain reaction (RT-PCR). The expression of the CD46 gene was determined...
September 1, 2017: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/28968974/cap-dependent-translational-control-of-oncolytic-measles-virus-infection-in-malignant-mesothelioma
#4
Blake A Jacobson, Ahad A Sadiq, Shaogeng Tang, Joe Jay-Dixon, Manish R Patel, Jeremy Drees, Brent S Sorenson, Stephen J Russell, Robert A Kratzke
Malignant mesothelioma has a poor prognosis for which there remains an urgent need for successful treatment approaches. Infection with the Edmonston vaccine strain (MV-Edm) derivative of measles virus results in lysis of cancer cells and has been tested in clinical trials for numerous tumor types including mesothelioma. Many factors play a role in MV-Edm tumor cell selectivity and cytopathic activity while also sparing non-cancerous cells. The MV-Edm receptor CD46 (cluster of differentiation 46) was demonstrated to be significantly higher in mesothelioma cells than in control cells...
September 8, 2017: Oncotarget
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-vitro
#5
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...
September 21, 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
#6
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/28939980/targeted-exome-sequencing-in-anti-factor-h-antibody-negative-hus-reveals-multiple-variations
#7
R W Thergaonkar, Ankita Narang, Bahadur Singh Gurjar, Pradeep Tiwari, Mamta Puraswani, Himanshi Saini, Aditi Sinha, Binuja Varma, Mitali Mukerji, Pankaj Hari, Arvind Bagga
BACKGROUND: Genetic susceptibility to atypical hemolytic uremic syndrome (aHUS) may lie within genes regulating or activating the alternate complement and related pathways converging on endothelial cell activation. METHODS: We tested 32 Indian patients of aHUS negative for antibodies to complement factor H for genetic variations in a panel of 15 genes, i.e., CFH, CFHR1-5, CFI, CFB, C3, CD46, MASP2, DGKE, ADAMTS13, THBD and PLG using next-generation DNA sequencing and for copy number variation in CFHR1-3...
September 22, 2017: Clinical and Experimental Nephrology
https://www.readbyqxmd.com/read/28930996/assessment-of-the-anticoagulant-and-anti-inflammatory-properties-of-endothelial-cells-using-3d-cell-culture-and-non-anticoagulated-whole-blood
#8
Riccardo Sfriso, Anjan Bongoni, Yara Banz, Nikolai Klymiuk, Eckhard Wolf, Robert Rieben
In vivo, endothelial cells are crucial for the natural anticoagulation of circulating blood. Consequently, endothelial cell activation leads to blood coagulation. This phenomenon is observed in many clinical situations, like organ transplantation in the presence of pre-formed anti-donor antibodies, including xenotransplantation, as well as in ischemia/reperfusion injury. In order to reduce animal experimentation according to the 3R standards (reduction, replacement and refinement), in vitro models to study the effect of endothelial cell activation on blood coagulation would be highly desirable...
September 5, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28797937/immunohistochemical-characterization-and-sensitivity-to-human-adenovirus-serotypes-3-5-and-11p-of-new-cell-lines-derived-from-human-diffuse-grade-ii-to-iv-gliomas
#9
Minna Niittykoski, Mikael von Und Zu Fraunberg, Miika Martikainen, Tuomas Rauramaa, Arto Immonen, Susanna Koponen, Ville Leinonen, Markus Vähä-Koskela, Qiwei Zhang, Florian Kühnel, Ya-Fang Mei, Seppo Ylä-Herttuala, Juha E Jääskeläinen, Ari Hinkkanen
BACKGROUND: Oncolytic adenoviruses show promise in targeting gliomas because they do not replicate in normal brain cells. However, clinical responses occur only in a subset of patients. One explanation could be the heterogenic expression level of virus receptors. Another contributing factor could be variable activity of tumor antiviral defenses in different glioma subtypes. METHODS: We established a collection of primary low-passage cell lines from different glioma subtypes (3 glioblastomas, 3 oligoastrocytomas, and 2 oligodendrogliomas) and assessed them for receptor expression and sensitivity to human adenovirus (HAd) serotypes 3, 5, and 11p...
October 2017: Translational Oncology
https://www.readbyqxmd.com/read/28789701/a-novel-bladder-cancer-specific-oncolytic-adenovirus-by-cd46-and-its-effect-combined-with-cisplatin-against-cancer-cells-of-car-negative-expression
#10
Wenjuan Cao, Junqiang Tian, Chong Li, Yanjun Gao, Xingchen Liu, Jianzhong Lu, Yuhan Wang, Zhiping Wang, Robert S Svatek, Ronald Rodriguez
BACKGROUND: Conditionally replicative oncolytic adenoviruses (CRAds) display significant anti-tumor effects. However, the traditional adenovirus of serotype 5 (Ad5) entering cancer cells via coxsackie virus and adenovirus receptor (CAR) can't be utilized for bladder cancer with low expression of CAR, which limits the application of Ad5. METHODS: We utilized Ad5/F11p containing the chimeric fiber gene encoding the Ad5 fiber tail domain and Ad11p fiber shaft and knob domains to construct bladder cancer-specific chimeric type viruses Ad5/F11p-PSCAE-UPII-E1A, which can infect bladder cancer cells mediated by CD46 molecule...
August 8, 2017: Virology Journal
https://www.readbyqxmd.com/read/28752844/routine-use-of-clinical-exome-based-next-generation-sequencing-for-evaluation-of-patients-with-thrombotic-microangiopathies
#11
Joseph P Gaut, Sanjay Jain, John D Pfeifer, Katinka A Vigh-Conrad, Meagan Corliss, Mukesh K Sharma, Jonathan W Heusel, Catherine E Cottrell
Next-generation sequencing is increasingly used for clinical evaluation of patients presenting with thrombotic microangiopathies because it allows for simultaneous interrogation of multiple complement and coagulation pathway genes known to be associated with disease. However, the diagnostic yield is undefined in routine clinical practice. Historic studies relied on case-control cohorts, did not apply current guidelines for variant pathogenicity assessment, and used targeted gene enrichment combined with next-generation sequencing...
July 28, 2017: Modern Pathology: An Official Journal of the United States and Canadian Academy of Pathology, Inc
https://www.readbyqxmd.com/read/28715486/anti-neu5gc-and-anti-non-neu5gc-antibodies-in-healthy-humans
#12
Bingsi Gao, Cassandra Long, Whayoung Lee, Zhongqiang Zhang, Xiaotian Gao, Doug Landsittel, Mohamed Ezzelarab, David Ayares, Yuliang Huang, David K C Cooper, Yi Wang, Hidetaka Hara
Our group previously investigated the levels of anti-Gal and anti-nonGal IgM and IgG in a cohort of 75 healthy humans of various backgrounds, and found some significant differences related to factors such as age, gender, ABO blood group, diet, vaccination history, and geographic location during childhood. We have now expanded our cohort (n = 84) to investigate the levels of anti-Neu5Gc and anti-nonGal/nonNeu5Gc antibodies in healthy humans. Anti-nonGal and anti-nonGal/nonNeu5Gc human IgM and IgG binding to pRBCs and pAECs from GTKO/CD46 and GTKO/CD46/Neu5GcKO pigs were measured by flow cytometry...
2017: PloS One
https://www.readbyqxmd.com/read/28666265/cap-dependent-translational-control-of-oncolytic-measles-virus-infection-in-malignant-mesothelioma
#13
Blake A Jacobson, Ahad A Sadiq, Shaogeng Tang, Joe Jay-Dixon, Manish R Patel, Jeremy Drees, Brent S Sorenson, Stephen J Russell, Robert A Kratzke
Malignant mesothelioma has a poor prognosis for which there remains an urgent need for successful treatment approaches. Infection with the Edmonston vaccine strain (MV-Edm) derivative of measles virus results in lysis of cancer cells and has been tested in clinical trials for numerous tumor types including mesothelioma. Many factors play a role in MV-Edm tumor cell selectivity and cytopathic activity while also sparing non-cancerous cells. The MV-Edm receptor CD46 (cluster of differentiation 46) was demonstrated to be significantly higher in mesothelioma cells than in control cells...
June 27, 2017: Oncotarget
https://www.readbyqxmd.com/read/28626544/atypical-hemolytic-uremic-syndrome-a-brief-review
#14
REVIEW
Kuixing Zhang, Yuxin Lu, Kevin T Harley, Minh-Ha Tran
Atypical hemolytic uremic syndrome (aHUS) is a disease characterized by the triad of microangiopathic hemolytic anemia, thrombocytopenia and acute kidney injury. The histopathologic lesions of aHUS include thrombotic microangiopathy involving the glomerular capillaries and thrombosis involving arterioles or interlobar arteries. Extra-renal manifestations occur in up to 20% of patients. The majority of aHUS is caused by complement system defects impairing ordinary regulatory mechanisms. Activating events therefore lead to unbridled, ongoing complement activity producing widespread endothelial injury...
June 1, 2017: Hematology Reports
https://www.readbyqxmd.com/read/28542228/alteration-of-membrane-complement-regulators-is-associated-with-transporter-status-in-patients-on-peritoneal-dialysis
#15
Daniel Kitterer, Dagmar Biegger, Stephan Segerer, Niko Braun, M Dominik Alscher, Joerg Latus
INTRODUCTION: A growing body of evidence from animal models and cell culture studies indicate an important role of a local regulatory complement system (CS) in peritoneal injury during peritoneal dialysis (PD). We investigated the expression of the local regulatory CS (reflected by CD46,CD55,CD59) in the peritoneal tissue of patients with different membrane function characteristics. PATIENTS AND METHODS: Biopsies from the parietal peritoneum were taken from 24 patients on PD, 22 uremic patients prior to PD...
2017: PloS One
https://www.readbyqxmd.com/read/28476687/alternative-polyadenylation-expands-the-mrna-isoform-repertoire-of-human-cd46
#16
Phuong Thao Ly, Sze Jing Tang, Xavier Roca
Alternative polyadenylation is a prevalent mechanism regulating mammalian gene expression. While tandem 3'-Untranslated-Region (3'UTR) polyadenylation changes expression levels, Intronic PolyAdenylation generates shorter transcripts encoding truncated proteins. Intronic PolyAdenylation regulates 20% of genes and is especially common in receptor tyrosine-kinase transcripts, generating soluble repressors. Here we report that human CD46, encoding a TransMembrane repressor of complement and T-cell co-stimulator, expresses multiple isoforms by alternative polyadenylation...
August 20, 2017: Gene
https://www.readbyqxmd.com/read/28474373/angiopoietin-1-and-angiopoietin-2-protect-porcine-iliac-endothelial-cells-from-human-antibody-mediated-complement-dependent-cytotoxicity-through-phosphatidylinositide-3-kinase-akt-pathway-activation
#17
Hanchao Gao, Pengfei Chen, Ling Wei, Jia Xu, Lu Liu, Yanli Zhao, Hidetaka Hara, Dengke Pan, Zesong Li, David K C Cooper, Zhiming Cai, Lisha Mou
Cytokines play crucial roles in inflammation, but their role in xenotransplantation remains elusive. We assessed the role of several cytokines using an in vitro model of human antibody-mediated complement-dependent cytotoxicity (CDC). Recombinant human angiopoietin-1 (Ang-1) protected porcine iliac endothelial cells (PIECs) from human antibody-mediated CDC. Interestingly, human angiopoietin-2 (Ang-2) had a similar protective effect on PIECs. By flow cytometry analysis, the extent of human IgM and IgG binding to PIECs did not decrease when PIECs were exposed to Ang-1/Ang-2...
July 2017: Xenotransplantation
https://www.readbyqxmd.com/read/28446314/-changes-of-neutrophil-cd64-in-patients-with-hematological-mali-gnancies-combined-with-bacterial-infections
#18
Xin Dai, Jian-Ping Li, Wen-Qian Li, Jian-Ming Feng
OBJECTIVE: To explore the changes of CD64 on surface of neutrophils in patients with hematological malignancies combined with bacterial infections. METHODS: Ninety-seven patients with hematological tumor admitted in our hospital from August 2014 to February 2016 were selected and divided into 2 groups: infection group(50 cases) and noninfection group(47 cases) according to their symptoms, physical sings and blood culture results for microbiologic detection. The CD46 index on surface of neutrophils, serum C- reactive protein (CRP), neutrophil count (NC) and procalcitonin (PCT) level were detected by flow cytometry...
April 2017: Zhongguo Shi Yan Xue Ye Xue za Zhi
https://www.readbyqxmd.com/read/28444759/dysregulated-cd46-shedding-interferes-with-th1-contraction-in-systemic-lupus-erythematosus
#19
Ursula Ellinghaus, Andrea Cortini, Christopher L Pinder, Gaelle Le Friec, Claudia Kemper, Timothy J Vyse
IFN-γ-producing T helper 1 (Th1) cell responses mediate protection against infections but uncontrolled Th1 activity also contributes to a broad range of autoimmune diseases. Autocrine complement activation has recently emerged as key in the induction and contraction of human Th1 immunity: activation of the complement regulator CD46 and the C3aR expressed by CD4(+) T cells via autocrine generated ligands C3b and C3a, respectively, are critical to IFN-γ production. Further, CD46-mediated signals also induce co-expression of immunosuppressive IL-10 in Th1 cells and transition into a (self)-regulating and contracting phase...
July 2017: European Journal of Immunology
https://www.readbyqxmd.com/read/28413120/endosome-to-trans-golgi-network-transport-of-proprotein-convertase-7-is-mediated-by-a-cluster-of-basic-amino-acids-and-palmitoylated-cysteines
#20
Jeroen Declercq, Bruno Ramos-Molina, Ragna Sannerud, Bas Brouwers, Vincent P E G Pruniau, Sandra Meulemans, Evelyn Plets, Wim Annaert, John W M Creemers
Proprotein Convertase 7 (PC7) is a Furin-like endoprotease that cleaves precursor proteins at basic amino acids. PC7 is concentrated in the trans-Golgi network (TGN) but it shuttles between the plasma membrane and the TGN depending on sequences in the cytoplasmic tail. A short region containing a three amino acids motif, P(724)-L(725)-C(726), is essential and sufficient for internalization of PC7 but not for TGN localization, which requires the additional presence of the juxtamembrane region. In this study we have investigated the contribution of a cluster of basic amino acids and two reversibly palmitoylated cysteine residues to endocytic trafficking...
August 2017: European Journal of Cell Biology
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