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https://www.readbyqxmd.com/read/28631067/antibodies-against-complement-components-relevance-for-the-antiphospholipid-syndrome-biomarkers-of-the-disease-and-biopharmaceuticals
#1
REVIEW
Mirjana Bećarević
PURPOSE OF REVIEW: Laboratory criterion for the diagnosis of antiphospholipid syndrome (APS) is the presence of antiphospholipid antibodies (aPL Abs). Complement system has a role in mediating aPL Abs-induced thrombosis in animal models. The importance of antibodies against complement components (potential biomarkers of APS) and the importance of antibodies with beneficial anti-complement effects in APS (as biopharmaceuticals) are reviewed. RECENT FINDINGS: Antibodies against complement components described in APS patients, so far, are anti-C1q and anti-factor H Abs, although anti-factor B Abs and anti-C5a Abs were described in animal models of APS...
July 2017: Current Rheumatology Reports
https://www.readbyqxmd.com/read/28630174/experimental-pathologic-and-clinical-findings-of-radiofrequency-catheter-ablation-of-para-hisian-region-from-the-right-ventricle-in-dogs-and-humans
#2
Yumei Xue, Xianzhang Zhan, Shulin Wu, Hongyue Wang, Yang Liu, Zili Liao, Hai Deng, Xuejing Duan, Shaoying Zeng, Dongpo Liang, Arif Elvan, Xianhong Fang, Hongtao Liao, Anand R Ramdat Misier, Jaap Jan J Smit, Andreas Metzner, Christian-Hendrik Heeger, Fangzhou Liu, Feng Wang, Zhiwei Zhang, Karl-Heinz Kuck, Siew Yen Ho, Feifan Ouyang
BACKGROUND: Ablation of para-Hisian accessory pathway (AP) poses high risks of atrioventricular block. We developed a pacing technique to differentiate the near-field (NF) from far-field His activations to avoid the complication. METHODS AND RESULTS: Three-dimensional mapping of the right ventricle was performed in 15 mongrel dogs and 23 patients with para-Hisian AP. Using different pacing outputs, the NF- and far-field His activation was identified on the ventricular aspect...
June 2017: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/28628799/a-novel-2-stage-approach-that-detects-complement-activation-in-patients-with-antiphospholipid-antibody-syndrome
#3
Jacob H Rand, Xiao-Xuan Wu, Lucia R Wolgast, Victor Lei, Edward M Conway
INTRODUCTION: The antiphospholipid syndrome (APS) is marked by autoantibodies that recognize anionic phospholipids in a cofactor-dependent manner. A role for complement has been implicated in the pathophysiology, however, elevations of complement activation markers have not been consistently demonstrated in clinical studies. We therefore designed a proof-of-principle study to determine whether complement activation might be detectable in APS by first exposing plasmas to phospholipid vesicles...
June 9, 2017: Thrombosis Research
https://www.readbyqxmd.com/read/28628734/effect-of-abdominopelvic-sepsis-on-cancer-outcome-in-patients-undergoing-sphincter-saving-surgery-for-rectal-cancer
#4
Dirk Van de Putte, Elke Van Daele, Wouter Willaert, Piet Pattyn, Wim Ceelen, Yves Van Nieuwenhove
BACKGROUND: In rectal cancer, the significance of abdominopelvic sepsis (APS) on metastatic tumor growth remains uncertain. We aimed to analyze the effect of abdominopelvic sepsis on long-term survival in patients undergoing restorative rectal cancer surgery. METHODS: Data were used from the Belgian PROCARE rectal cancer registry. The effect of abdominopelvic infection on survival was assessed in uni- and multivariable Cox regression models. The effect of clinical and pathological covariates was controlled by propensity score-based matching of cases with controls...
June 19, 2017: Journal of Surgical Oncology
https://www.readbyqxmd.com/read/28623610/a-singular-role-of-ik1-promoting-the-development-of-cardiac-automaticity-during-cardiomyocyte-differentiation-by-ik1-induced-activation-of-pacemaker-current
#5
Yu Sun, Valeriy Timofeyev, Adrienne Dennis, Emre Bektik, Xiaoping Wan, Kenneth R Laurita, Isabelle Deschênes, Ronald A Li, Ji-Dong Fu
The inward rectifier potassium current (IK1) is generally thought to suppress cardiac automaticity by hyperpolarizing membrane potential (MP). We recently observed that IK1 could promote the spontaneously-firing automaticity induced by upregulation of pacemaker funny current (If) in adult ventricular cardiomyocytes (CMs). However, the intriguing ability of IK1 to activate If and thereby promote automaticity has not been explored. In this study, we combined mathematical and experimental assays and found that only IK1 and If, at a proper-ratio of densities, were sufficient to generate rhythmic MP-oscillations even in unexcitable cells (i...
June 16, 2017: Stem Cell Reviews
https://www.readbyqxmd.com/read/28620754/variation-in-pediatric-post-ablation-care-a%C3%A2-survey-of-the-pediatric-and%C3%A2-congenital-electrophysiology-society-paces
#6
Brynn E Dechert, Macdonald Dick, David J Bradley, Martin J LaPage
Although catheter ablation is a standard treatment for pediatric arrhythmias, there are no consensus guidelines for follow-up care. This study describes the variation in post-ablation practices identified through a survey of the pediatric and congenital electrophysiology society (PACES). Pediatric and congenital electrophysiology society members were invited to participate in an online survey of post-ablation practices in September 2014. Survey questions targeted routine post-ablation practices for three common arrhythmia substrates: atrioventricular nodal reentry tachycardia, concealed accessory pathways (AP), and manifest APs...
June 15, 2017: Pediatric Cardiology
https://www.readbyqxmd.com/read/28620416/antiphospholipid-syndrome-multiple-manifestations-in-a-single-patient-a-high-suspicion-is-still-needed
#7
Uroosa Ibrahim, Shiksha Kedia, Gwenalyn Garcia, Jean Paul Atallah
Antiphospholipid Syndrome (APS) is an autoimmune disorder with clinical and laboratory features of vascular thrombosis, pregnancy loss, and persistent antiphospholipid antibodies (aPLs). The pathophysiology is thought to involve the activation of endothelial cells, monocytes, platelets, and complement by aPLs. Disease can range from asymptomatic to rapidly fatal catastrophic APS. We present a case of a 34-year-old male referred for pancytopenia and splenomegaly. On examination, he had decreased sensation and 4/5 power in the left upper extremity...
2017: Case Reports in Medicine
https://www.readbyqxmd.com/read/28620147/prostaglandin-i2-is-responsible-for-ameliorating-prostaglandin-e2-stress-in-stimulating-the-expression-of-tumor-necrosis-factor-%C3%AE-in-a-%C3%AE-amyloid-protein-dependent-mechanism
#8
Shao-Qin Zheng, Zi-Yi Gong, Chen-Di Lu, Pu Wang
Cyclooxygenase-2 (COX-2) has been found to be induced during the early stage of Alzheimer's disease (AD). Using mouse-derived astrocyte and APP/PS1 transgenic (Tg) mice as model systems, we firstly elucidated the mechanisms underlying COX-2 metabolic production including prostaglandin (PG)E2- and PGI2-mediated tumor necrosis factor α (TNF-α) regulation. Specifically, PGE2 accumulation in astrocyte activated the p38 and JNK/c-Jun signaling pathways via phosphorylation, resulting in TNF-α expression. In contrast, the administration of PGI2 attenuated the effects of PGE2 in stimulating the production of TNF-α by inhibiting the activity of TNF-α promoter and the binding activity of AP1 on the promoter of TNF-α...
June 13, 2017: Oncotarget
https://www.readbyqxmd.com/read/28619369/mechanisms-of-atherosclerosis-and-cardiovascular-disease-in-antiphospholipid-syndrome-and-systemic-lupus-erythematosus-new-therapeutic-approaches
#9
REVIEW
Chary Lopez-Pedrera, M Ángeles Aguirre-Zamorano, Carlos Pérez-Sánchez
Systemic lupus erythematosus (SLE) and antiphospholipid syndrome (APS) are 2 highly related autoimmune-rheumatic diseases associated with an increased risk of developing cardiovascular (CV) diseases. Despite the great progresses made in understanding the pathological mechanisms leading to CV diseases in those pathologies, there is still the unmet need to improve long term prognosis. CV diseases in SLE and APS is thought to happen as the result of a complex interaction between traditional CV risk factors, immune deregulation and disease activity, including the synergic effect of cytokines, chemokines, adipokines, proteases, autoantibodies, adhesion receptors, oxidative stress and a plethora of intracellular signalling molecules...
June 12, 2017: Medicina Clínica
https://www.readbyqxmd.com/read/28619060/incidence-disease-onset-and-short-term-outcome-in-urea-cycle-disorders-cross-border-surveillance-in-germany-austria-and-switzerland
#10
Susanne Nettesheim, Stefan Kölker, Daniela Karall, Johannes Häberle, Roland Posset, Georg F Hoffmann, Beate Heinrich, Florian Gleich, Sven F Garbade
BACKGROUND: Urea cycle disorders (UCDs) are a group of rare inherited metabolic disorders. Affected individuals often present with hyperammonemic encephalopathy (HE) and have an increased risk of severe neurologic disease and early death. The study aims to provide epidemiologic data and to describe the disease manifestation and short-term outcome. METHOD: Cross-border surveillance of newly diagnosed patients with UCDs - below 16 years of age - was performed from July 2012 to June 2015 in Germany and Austria and from January 2012 to December 2015 in Switzerland...
June 15, 2017: Orphanet Journal of Rare Diseases
https://www.readbyqxmd.com/read/28618239/extent-and-risks-of-antipsychotic-off-label-use-in-children-and-adolescents-in-germany-between-2004-and-2011
#11
Carsten Schröder, Michael Dörks, Bianca Kollhorst, Tilo Blenk, Ralf W Dittmann, Edeltraut Garbe, Oliver Riedel
OBJECTIVE: Only little is known about antipsychotic (AP) off-label use (OLU) in pediatric populations. It was the aim of this study to examine the frequency as well as the risks of off-label AP use in underaged patients. METHODS: To calculate the frequency of off-label AP prescriptions for the years 2004-2011, we used claims data of more than two million minors aged 0-17 years. Off-label prescriptions were analyzed with regard to type of OLU, physician specialty, and underlying diagnoses...
June 15, 2017: Journal of Child and Adolescent Psychopharmacology
https://www.readbyqxmd.com/read/28618000/in-vivo-analysis-of-synaptic-activity-in-cerebellar-nuclei-neurons-unravels-the-efficacy-of-excitatory-inputs
#12
Yasmin Yarden-Rabinowitz, Yosef Yarom
It is commonly agreed that the main function of the cerebellar system is to provide well-timed signals used for the execution of motor commands or prediction of sensory inputs. This function is manifested as a temporal sequence of spiking that should be expressed in the cerebellar nuclei projection neurons (CN). Whether spiking activity is generated by excitation or release from inhibition is still a hotly debated issue. In an attempt to resolve this debate, we recorded intracellularly from CN neurons in anaesthetized mice and performed an analysis of synaptic activity that yielded a number of important observations...
June 15, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28614899/determination-of-plasma-concentration-reference-ranges-for-risperidone-and-paliperidone
#13
Julia Korell, Bruce Green, Bart Remmerie, An Vermeulen
Schizophrenia is a common disease managed by a range of interventions with the primary treatment being antipsychotic medications (APS). Inadequate response, lack of adherence, and/or adverse events often prevent optimal therapeutic effects or therapeutic efficiency. Monitoring APS plasma concentrations can be used together with a full clinical evaluation to help improve patient care or offer better treatment options for the patient. To enable interpretation of individual risperidone and paliperidone plasma concentrations, we developed 'reference ranges', which consider the expected variability in plasma concentrations between subjects across the population, rather than representing a 'therapeutic range' that relates to efficacy and/or safety outcomes...
June 14, 2017: CPT: Pharmacometrics & Systems Pharmacology
https://www.readbyqxmd.com/read/28613100/myocardial-infarction-risk-and-antipsychotics-use-revisited-a-meta-analysis-of-10-observational-studies
#14
Kai-Lin Huang, Ching-Ju Fang, Chien-Chi Hsu, Shu-I Wu, Jimmy Jm Juang, Robert Stewart
OBJECTIVE: Associations between antipsychotic agent (AP) use and myocardial infarction (MI) risk have been inconsistent and remain controversial. We therefore conducted a meta-analysis of observational studies to address this knowledge gap. METHOD: Detailed electronic database searches were performed to identify reports of observational studies that evaluated the association between AP use and the risk of MI. Pooled odds ratios (ORs) were calculated using random or fixed-effects models...
June 1, 2017: Journal of Psychopharmacology
https://www.readbyqxmd.com/read/28611679/icariin-a-novel-blocker-of-sodium-and-calcium-channels-eliminates-early-and-delayed-afterdepolarizations-as-well-as-triggered-activity-in-rabbit-cardiomyocytes
#15
Wanzhen Jiang, Mengliu Zeng, Zhenzhen Cao, Zhipei Liu, Jie Hao, Peipei Zhang, Youjia Tian, Peihua Zhang, Jihua Ma
Icariin, a flavonoid monomer from Herba Epimedii, has confirmed pharmacological and biological effects. However, its effects on arrhythmias and cardiac electrophysiology remain unclear. Here we investigate the effects of icariin on ion currents and action potentials (APs) in the rabbit myocardium. Furthermore, the effects of icariin on aconitine-induced arrhythmias were assessed in whole rabbits. Ion currents and APs were recorded in voltage-clamp and current-clamp mode in rabbit left ventricular myocytes (LVMs) and left atrial myocytes (LAMs), respectively...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28610566/the-effect-of-astragalus-polysaccharides-on-attenuation-of-diabetic-cardiomyopathy-through-inhibiting-the-extrinsic-and-intrinsic-apoptotic-pathways-in-high-glucose-stimulated-h9c2-cells
#16
Shuqin Sun, Shuo Yang, Min Dai, Xiujuan Jia, Qiyan Wang, Zheng Zhang, Yongjun Mao
BACKGROUND: Apoptosis plays a critical role in the progression of diabetic cardiomyopathy (DC). Astragalus polysaccharides (APS), an extract of astragalus membranaceus (AM), is an effective cardioprotectant. Currently, little is known about the detailed mechanisms underlying cardioprotective effects of APS. The aims of this study were to investigate the potential effects and mechanisms of APS on apoptosis employing a model of high glucose induction of apoptosis in H9C2 cells. METHODS: A model of high glucose induction of H9C2 cell apoptosis was adopted in this research...
June 13, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28610498/assistant-practitioners-scheme-to-bridge-the-gap
#17
(no author information available yet)
An NHS trust is training assistant practitioners (APs) to bridge the gap between the duties of healthcare assistants and nurses.
June 14, 2017: Nursing Standard
https://www.readbyqxmd.com/read/28607422/morphology-controls-how-hippocampal-ca1-pyramidal-neuron-responds-to-uniform-electric-fields-a-biophysical-modeling-study
#18
Guo-Sheng Yi, Jiang Wang, Bin Deng, Xi-Le Wei
Responses of different neurons to electric field (EF) are highly variable, which depends on intrinsic properties of cell type. Here we use multi-compartmental biophysical models to investigate how morphologic features affect EF-induced responses in hippocampal CA1 pyramidal neurons. We find that the basic morphologies of neuronal elements, including diameter, length, bend, branch, and axon terminals, are all correlated with somatic depolarization through altering the current sources or sinks created by applied field...
June 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28604464/liver-transplantation-in-a-patient-with-antiphospholipid-syndrome-a-case-report
#19
Rachel C Steckelberg, Zarah D Antongiorgi, Randolph H Steadman
Antiphospholipid syndrome (APS) is an acquired thrombophilic disorder characterized by autoantibodies to cell membrane phospholipids. While altered coagulation can complicate end-stage liver disease, there are few reports describing the perioperative management for liver transplantation in recipients with a preexisting hypercoagulable disorder, such as APS. We present a patient with a history of APS, Budd-Chiari syndrome with cirrhosis, hepatopulmonary syndrome, and heparin-induced thrombocytopenia who underwent liver transplantation complicated by hepatic artery thrombosis...
June 8, 2017: A & A Case Reports
https://www.readbyqxmd.com/read/28598358/a-smartphone-indoor-localization-algorithm-based-on-wlan-location-fingerprinting-with-feature-extraction-and-clustering
#20
Junhai Luo, Liang Fu
With the development of communication technology, the demand for location-based services is growing rapidly. This paper presents an algorithm for indoor localization based on Received Signal Strength (RSS), which is collected from Access Points (APs). The proposed localization algorithm contains the offline information acquisition phase and online positioning phase. Firstly, the AP selection algorithm is reviewed and improved based on the stability of signals to remove useless AP; secondly, Kernel Principal Component Analysis (KPCA) is analyzed and used to remove the data redundancy and maintain useful characteristics for nonlinear feature extraction; thirdly, the Affinity Propagation Clustering (APC) algorithm utilizes RSS values to classify data samples and narrow the positioning range...
June 9, 2017: Sensors
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