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C3 complement

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https://www.readbyqxmd.com/read/28741977/reduction-in-the-presence-of-cryoglobulins-over-time-in-the-hemodialysis-treatment
#1
Tainá Mosca, Simone Sanches Arcuri, Luiz Antônio Miorin, Andrelita de Oliveira Cristiano, Yvoty Alves Dos Santos Sens, Wilma Carvalho Neves Forte
BACKGROUND: The presence of cryoglobulins in patients with chronic kidney disease (CKD) on hemodialysis is well described. However, the generation of cryoglobulins during the dialysis treatment has yet to be established. The aim of the present study was to determine the presence of serum cryoglobulins over time in the dialysis treatment in patients with CKD not infected with hepatitis C virus (HCV). METHOD: Peripheral blood samples were collected at the beginning of dialysis treatment and at 30, 60, 90 and 120 days afterwards...
November 2017: Renal Failure
https://www.readbyqxmd.com/read/28739830/complement-c3-as-a-prompt-for-human-macrophage-death-during-infection-with-francisella-tularensis-strain-schu-s4
#2
Susan R Brock, Michael J Parmely
Tularemia is caused by the gram-negative bacterial pathogen Francisella tularensis Infection of macrophages and their subsequent death are believed to play important roles in the progression of disease. Because complement is a particularly effective opsonin for Francisella, we asked whether complement-dependent uptake of F. tularensis strain SCHU S4 affects the survival of primary human macrophages during infection. Complement component C3 was found to be an essential opsonin in human serum not only for greatly increased uptake of SCHU S4, but for the induction of macrophage death...
July 24, 2017: Infection and Immunity
https://www.readbyqxmd.com/read/28739769/effects-of-different-palliative-jaundice-reducing-methods-on-immunologic-functions-in-patients-with-advanced-malignant-obstructive-jaundice
#3
Kun Tang, Lu-Lu Sui, Gang Xu, Tong Zhang, Qiang Liu, Xiao-Fang Liu
BACKGROUND/AIM: This study aimed to investigate the effects of three treatment methods on the immunological function of patients with advanced malignant obstructive jaundice (MOJ). PATIENTS AND METHODS: Patients with advanced MOJ were randomly divided into three groups according to biliary drainage methods. Detection of levels of multi-indices were investigated in different time periods. RESULTS: After drainage, the levels of complement 3 (C3) and complement 4 (C4) were increased...
August 2017: Anticancer Research
https://www.readbyqxmd.com/read/28735646/hyperhomocysteinemia-and-age-related-macular-degeneration-role-of-inflammatory-mediators-and-pyroptosis-a-proposal
#4
Mahavir Singh, Suresh C Tyagi
Age-related macular degeneration (AMD) and pyroptosis cause irreversible vascular changes in the eyes leading to central vision loss in patients. It is the most common eye disease affecting millions of people aged 50years or older, and is slowly becoming a major health problem worldwide. The disease mainly affects macula lutea, an oval-shaped pigmented area surrounding fovea near the center of retina, a region responsible for visual acuity. It is fairly a complex disease as genetics of patients, environmental triggers as well as risk factors such as age, family history of CVDs, diabetes, gender, obesity, race, hyperopia, iris color, smoking, diabetes, exposure to sun light and pyroptosis have all been clubbed together as probable causes of macular degeneration...
August 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/28732643/development-and-internal-validation-of-a-prediction-model-to-estimate-the-probability-of-needing-aggressive-immunosuppressive-therapy-with-cytostatics-in-de-novo-lupus-nephritis-patients
#5
Mauricio Restrepo-Escobar, Paula Andrea Granda-Carvajal, Fabián Jaimes
OBJECTIVE: To develop a multivariable clinical prediction model for the requirement of aggressive immunosuppression with cytostatics, based on simple clinical record data and lab tests. The model is defined in accordance with the result of the kidney biopsies. METHODS: Retrospective study conducted with data from patients 16 years and older, with SLE and nephritis with less than 6 months of evolution. An initial bivariate analysis was conducted to select the variables to be included in a multiple logistic regression model...
July 18, 2017: Reumatología Clinica
https://www.readbyqxmd.com/read/28729648/a-haplotype-in-cfh-family-genes-confers-high-risk-of-rare-glomerular-nephropathies
#6
Yin Ding, Weiwei Zhao, Tao Zhang, Hao Qiang, Jianping Lu, Xin Su, Shuzhen Wen, Feng Xu, Mingchao Zhang, Haitao Zhang, Caihong Zeng, Zhihong Liu, Huimei Chen
Despite distinct renal lesions, a series of rare glomerular nephropathies are reportedly mediated by complement overactivation. Genetic variations in complement genes contribute to disease risk, but the relationship of genotype to phenotype has not been straightforward. Here, we screened 11 complement genes from 91 patients with atypical hemolytic uremic syndrome (aHUS), C3 glomerulopathy (C3G) and membranoproliferative glomerulonephritis type I (MPGN I), and identified the concomitant presence of three missense variations located within the human complement Factor H (CFH) gene cluster...
July 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28729035/a-novel-cfhr1-cfhr5-hybrid-leads-to-a-familial-dominant-c3-glomerulopathy
#7
Shambhuprasad K Togarsimalemath, Sidharth K Sethi, Rajan Duggal, Moglie Le Quintrec, Pranaw Jha, Régis Daniel, Florence Gonnet, Shyam Bansal, Lubka T Roumenina, Veronique Fremeaux-Bacchi, Vijay Kher, Marie-Agnes Dragon-Durey
The intrinsic similarity shared between the members of the complement factor H family, which comprises complement factor H and five complement factor H-related (CFHR) genes, leads to various recombination events. In turn these events lead to deletions of some genes or abnormal proteins, which are found in patients with atypical hemolytic uremic syndrome or C3 glomerulopathies. Here we describe a novel genetic rearrangement generated from a heterozygous deletion spanning 146 Kbp involving multiple CFHR genes leading to a CFHR1-R5 hybrid protein...
July 17, 2017: Kidney International
https://www.readbyqxmd.com/read/28724763/species-specificity-of-vaccinia-virus-complement-control-protein-towards-bovine-classical-pathway-is-governed-primarily-by-direct-interaction-of-its-acidic-residues-with-factor-i
#8
Jitendra Kumar, Viveka Nand Yadav, Swastik Phulera, Ashish Kamble, Avneesh Kumar Gautam, Hemendra Singh Panwar, Arvind Sahu
Poxviruses display species tropism - variola virus is a human-specific virus, while vaccinia virus causes repeated outbreaks in dairy cattle. Consistent with this, variola virus complement regulator SPICE exhibit selectivity in inhibiting the human alternative complement pathway and vaccinia virus complement regulator VCP display selectivity in inhibiting the bovine alternative complement pathway. In the present study, we examined the species-specificity of VCP and SPICE towards the classical pathway (CP). We observed that VCP is ∼43-fold superior in inhibiting bovine CP than SPICE...
July 19, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28722144/mechanisms-involved-in-hypersensitivity-reactions-to-polysulfone-hemodialysis-membranes
#9
Aranzazu Rodríguez-Sanz, Rafael Sánchez-Villanueva, Javier Domínguez-Ortega, Ana-María Fiandor, María-Paz Ruiz, Filomena Trocoli, Rafael Díaz-Tejeiro, Carlos Cadenillas, Elena González, Virginia Martínez, Margarita López-Trascasa, Santiago Quirce, Rafael Selgas, Teresa Bellón
Several cases of patients with anaphylactic or systemic hypersensitivity reactions to polysulfone (PS) hemodialysis (HD) membranes and tolerance to cellulose triacetate (CTA) membranes have recently been reported. To investigate the mechanisms involved in PS hypersensitivity, basophil, T cell, and complement activation were analyzed in acute-phase samples from two patients with systemic reactions to PS-based membranes. Basophil and T cell activation, as well as higher serum tryptase levels were detected in acute-phase samples compared with basal levels...
July 19, 2017: Artificial Organs
https://www.readbyqxmd.com/read/28716013/long-term-renal-survival-of-%C3%AE-3-heavy-chain-deposition-disease-a-case-report
#10
Takayuki Katsuno, Shige Mizuno, Masatsuna Mabuchi, Naotake Tsuboi, Atsushi Komatsuda, Shoichi Maruyama
BACKGROUND: Monoclonal immunoglobulin deposition disease (MIDD) is characterized by the non-amyloid deposition of monoclonal immunoglobulin fragments in the basement membranes. Heavy chain deposition disease (HCDD) is a type of MIDD. HCDD is an extremely rare disease, and only three cases have been reported in Japan up to the present. The prognosis of HCDD is very poor, and optimal treatment has not been established. Only a few cases of HCDD with favorable long-term renal prognosis have been reported to date...
July 17, 2017: BMC Nephrology
https://www.readbyqxmd.com/read/28712854/c5-nephritic-factors-drive-the-biological-phenotype-of-c3-glomerulopathies
#11
Maria-Chiara Marinozzi, Sophie Chauvet, Moglie Le Quintrec, Morgane Mignotet, Florent Petitprez, Christophe Legendre, Mathilde Cailliez, Georges Deschenes, Michel Fischbach, Alexandre Karras, Francois Nobili, Christine Pietrement, Marie-Agnes Dragon-Durey, Fadi Fakhouri, Lubka T Roumenina, Veronique Fremeaux-Bacchi
C3 Glomerulopathies, which include Dense Deposit Disease and C3 Glomerulonephritis, are associated with genetic and acquired dysregulation of the C3 convertase alternative pathway of complement. The potential role of the activation of the C5 convertase has not been studied extensively. Here we analyzed IgG samples from patients with C3 Glomerulopathies to identify circulating autoantibodies that stabilize the C3 alternative pathway (C3 Nephritic Factors) as well as C5 convertases (C5 Nephritic Factors), thus preventing decay of these enzyme complexes...
July 13, 2017: Kidney International
https://www.readbyqxmd.com/read/28710441/igg3-antigen-complexes-are-deposited-on-follicular-dendritic-cells-in-the-presence-of-c1q-and-c3
#12
Lu Zhang, Zhoujie Ding, Birgitta Heyman
IgG3, passively administered together with small proteins, induces enhanced primary humoral responses against these proteins. We previously found that, within 2 h of immunization, marginal zone (MZ) B cells capture IgG3-antigen complexes and transport them into splenic follicles and that this requires the presence of complement receptors 1 and 2. We have here investigated the localization of IgG3 anti-2, 4, 6-trinitrophenyl (TNP)/biotin-ovalbumin-TNP immune complexes in the follicles and the involvement of classical versus total complement activation in this process...
July 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28707730/complement-and-contact-system-activation-in-acute-congestive-heart-failure-patients
#13
Chiara Suffritti, Eleonora Tobaldini, Riccardo Schiavon, Silvia Strada, Lorena Maggioni, Satish Mehta, Giulia Sandrone, Edgar Toschi-Dias, Marco Cicardi, Nicola Montano
BACKGROUND: Recent experimental data indicate a pathogenic role of complement activation in congestive heart failure (CHF). Aim of this study was to evaluate contact and complement systems activation in patients hospitalized for an acute episode of CHF. METHODS AND RESULTS: 42 of 80 consecutive patients admitted at our hospital with confirmed diagnosis of acute CHF were enrolled. They underwent blood sampling within 24 hours from admission (T0) and at clinical stability (T1)...
July 14, 2017: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/28700732/tissue-plasminogen-activator-mediates-deleterious-complement-cascade-activation-in-stroke
#14
Xue-Jun Zhao, Timothy M Larkin, Molly A Lauver, Saif Ahmad, Andrew F Ducruet
The use of intravenous tissue plasminogen activator (tPA) in the treatment of ischemic stroke is limited by its propensity to exacerbate brain edema and hemorrhage. The mechanisms underlying these deleterious effects of tPA remain incompletely understood. The purpose of this study was to delineate a pathway of tPA-mediated complement cascade activation in stroke and to determine whether complement inhibition ameliorates the adverse effects of post-ischemic tPA administration. We found that tPA promotes C3 cleavage both in vitro and in ischemic brain through a plasmin-mediated extrinsic pathway...
2017: PloS One
https://www.readbyqxmd.com/read/28698127/dietary-protein-levels-regulated-antibacterial-activity-inflammatory-response-and-structural-integrity-in-the-head-kidney-spleen-and-skin-of-grass-carp-ctenopharyngodon-idella-after-challenged-with-aeromonas-hydrophila
#15
Wei-Dan Jiang, Jing Xu, Xiao-Qiu Zhou, Pei Wu, Yang Liu, Jun Jiang, Sheng-Yao Kuang, Ling Tang, Wu-Neng Tang, Yong-An Zhang, Lin Feng
This study investigated the effects of dietary protein levels on disease resistance, immune function and structural integrity in the head kidney, spleen and skin of grass carp (Ctenopharyngodon idella). A total of 540 grass carp (264.11 ± 0.76 g) were fed six diets containing graded levels of protein (143.1, 176.7, 217.2, 257.5, 292.2 and 322.8 g digestible protein kg(-1) diet) for 8 weeks. After the growth trial, fish were challenged with Aeromonas hydrophila for 14 days. The results indicated that optimal levels of dietary protein: (1) (1) increased the lysozyme (LA) and acid phosphatase (ACP) activities and the complement 3 (C3) and C4 contents, up-regulated antimicrobial peptides, anti-inflammatory cytokines, inhibitor of κBα, target of rapamycin and ribosomal protein S6 kinases 1 mRNA levels, whereas down-regulated pro-inflammatory cytokines, nuclear factor kappa B (NF-κB) P65, IKKβ, IKKγ, eIF4E-binding proteins (4E-BP) 1 and 4E-BP2 mRNA levels in the head kidney, spleen and skin of grass carp (P < 0...
July 8, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28698068/new-nanoparticles-obtained-by-co-assembly-of-amphiphilic-cyclodextrins-and-nonlamellar-single-chain-lipids-preparation-and-characterization
#16
Cảnh Hưng Nguyễn, Jean-Luc Putaux, Gianluca Santoni, Sana Tfaili, Sophie Fourmentin, Jean-Baptiste Coty, Luc Choisnard, Annabelle Gèze, Denis Wouessidjewe, Gillian Barratt, Sylviane Lesieur, François-Xavier Legrand
This work aimed at preparing new nanoscale assemblies based on an amphiphilic bio-esterified β-cyclodextrin (β-CD), substituted at the secondary face with n-decanoic fatty acid chains (β-CD-C10), and monoolein (MO) as new carriers for parenteral drug delivery. Stable binary (β-CD-C10/MO) and ternary (β-CD-C10/MO/stabilizer) nanoscale assemblies close to 100nm in size were successfully prepared in water by the solvent displacement method. The generated nanoparticles were fully characterized by dynamic light scattering, transmission electron microscopy, small-angle X-ray scattering, residual solvent analysis, complement activation and the contribution of each formulation parameter was determined by principal component analysis...
July 8, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28697742/increased-c4-and-decreased-c3-levels-are-associated-with-a-poor-prognosis-in-patients-with-immunoglobulin-a-nephropathy-a-retrospective-study
#17
Min Pan, Ji Zhang, Zhanyuan Li, Lingwei Jin, Yu Zheng, Zhihong Zhou, Su Zhen, Guoyuan Lu
BACKGROUND: An association between serum complement levels and poor renal prognosis in patients with immunoglobulin A nephropathy (IgAN) remains controversial. METHODS: We conducted a retrospective study examining the relationship between serum complement levels and prognosis in patients with IgAN. Between 2009 and 2013, patients with biopsy-confirmed IgAN were identified from the Second Affiliated Hospital of Wenzhou Medical College, China, and various parameters were documented during follow-up until 2015...
July 11, 2017: BMC Nephrology
https://www.readbyqxmd.com/read/28694465/generation-of-complement-protein-c3-deficient-pigs-by-crispr-cas9-mediated-gene-targeting
#18
Wei Zhang, Guan Wang, Ying Wang, Yong Jin, Lihua Zhao, Qiang Xiong, Lining Zhang, Lisha Mou, Rongfeng Li, Haiyuan Yang, Yifan Dai
Complement protein C3 is the pivotal component of the complement system. Previous studies have demonstrated that C3 has implications in various human diseases and exerts profound functions under certain conditions. However, the delineation of pathological and physiological roles of C3 has been hampered by the insufficiency of suitable animal models. In the present study, we applied the clustered regularly interspaced short palindromic repeat (CRISPR)/CRISPR-associated (Cas) system to target the C3 gene in porcine fetal fibroblasts...
July 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28683778/unusual-acute-lupus-hemophagocytic-syndrome-a-test-of-diagnostic-criteria-a-case-report
#19
Wijetunga Mudalige Udai Akalanka Wijetunga, Ravindra Laxman Satarasinghe, Balasuriya Mudiyanselage Dayananda, Ganhewage Kokila Darshani
BACKGROUND: Hemophagocytic lymphohistiocytosis is an aggressive life-threatening syndrome of excessive immune activation. Hemophagocytic lymphohistiocytosis due to systemic lupus erythematosus is described as acute lupus hemophagocytic syndrome. Acute lupus hemophagocytic syndrome presenting with negative antinuclear antibody is uncommon. CASE PRESENTATION: A 57-year-old Sri Lankan woman presented with intermittent fever, weight loss, episodic confusion, and alopecia for 3 months...
July 7, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/28683725/maldi-tof-ms-analysis-in-discovery-and-identification-of-serum-proteomic-patterns-of-ovarian-cancer
#20
Agata Swiatly, Agnieszka Horala, Joanna Hajduk, Jan Matysiak, Ewa Nowak-Markwitz, Zenon J Kokot
BACKGROUND: Due to high mortality and lack of efficient screening, new tools for ovarian cancer (OC) diagnosis are urgently needed. To broaden the knowledge on the pathological processes that occur during ovarian cancer tumorigenesis, protein-peptide profiling was proposed. METHODS: Serum proteomic patterns in samples from OC patients were obtained using matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF). Eighty nine serum samples (44 ovarian cancer and 45 healthy controls) were pretreated using solid-phase extraction method...
July 6, 2017: BMC Cancer
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