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https://www.readbyqxmd.com/read/28203563/unsuccessful-treatment-with-abatacept-in-recurrent-focal-segmental-glomerulosclerosis-after-kidney-transplantation
#1
Tilde Kristensen, Per Ivarsen, Johan Vestergaard Povlsen
Recurrence of focal segmental glomerulosclerosis (FSGS) after renal transplantation occurs in up to 20-50% of FSGS patients and is associated with inferior allograft survival. Treatment of both primary FSGS as well as recurrent FSGS after transplantation with plasma exchange and immunosuppression is often unsuccessful and remains a major challenge as the disease still leads to end-stage renal disease and decreased graft survival. Previous case reports have described patients with recurrent FSGS who were successfully treated with a B7-1 inhibitor (abatacept) inducing partial or complete remission...
January 2017: Case Reports in Nephrology and Dialysis
https://www.readbyqxmd.com/read/28202288/tiam1-vav2-rac1-axis-a-tug-of-war-between-islet-function-and-dysfunction
#2
REVIEW
Anjaneyulu Kowluru
Glucose-stimulated insulin secretion [GSIS] from the islet β-cell involves a well-orchestrated interplay between metabolic and cationic events. It is well established that intracellular generation of adenine and guanine nucleotide triphosphates [e.g., ATP and GTP] represents one of the requisite signaling steps in GSIS. The small molecular mass GTP-binding proteins [G-proteins; e.g., Rac1 and Cdc42] have been shown to regulate islet β-cell function including actin cytoskeletal remodeling and fusion of insulin granules with the plasma membrane for GSIS to occur...
February 12, 2017: Biochemical Pharmacology
https://www.readbyqxmd.com/read/28199111/parallel-comparison-of-n-linked-glycopeptide-enrichment-techniques-reveals-extensive-glycoproteomic-analysis-of-plasma-enabled-by-sax-erlic
#3
Sarah M Totten, Christa L Feasley, Abel Bermudez, Sharon J Pitteri
Protein glycosylation is of increasing interest due to its important roles in protein function and aberrant expression with disease. Characterizing protein glycosylation remains analytically challenging due to its low abundance, ion suppression issues, and microheterogeneity at glycosylation sites, especially in complex samples such as human plasma. In this study, the utility of three common N-linked glycopeptide enrichment techniques is compared using human plasma. By analysis on an LTQ-Orbitrap Elite mass spectrometer, electrostatic repulsion hydrophilic interaction liquid chromatography using strong anion exchange solid-phase extraction (SAX-ERLIC) provided the most extensive N-linked glycopeptide enrichment when compared with multilectin affinity chromatography (M-LAC) and Sepharose-HILIC enrichments...
February 15, 2017: Journal of Proteome Research
https://www.readbyqxmd.com/read/28195073/effects-of-budesonide-on-the-lung-functions-inflammation-and-apoptosis-in-a-saline-lavage-model-of-acute-lung-injury
#4
D Mokra, P Kosutova, S Balentova, M Adamkov, P Mikolka, J Mokry, M Antosova, A Calkovska
Diffuse alveolar injury, edema, and inflammation are fundamental signs of acute lung injury (ALI) and acute respiratory distress syndrome (ARDS). Whereas the systemic administration of corticosteroids previously led to controversial results, this study evaluated if corticosteroids given intratracheally may improve lung functions and reduce edema formation, migration of cells into the lung and their activation in experimentally-induced ALI. In oxygen-ventilated rabbits, ALI was induced by repetitive saline lung lavage, until PaO2 decreased to < 26...
December 2016: Journal of Physiology and Pharmacology: An Official Journal of the Polish Physiological Society
https://www.readbyqxmd.com/read/28194093/effects-of-an-amylopectin-and-chromium-complex-on-the-anabolic-response-to-a-suboptimal-dose-of-whey-protein
#5
T N Ziegenfuss, H L Lopez, A Kedia, S M Habowski, J E Sandrock, B Raub, C M Kerksick, A A Ferrando
BACKGROUND: Previous research has demonstrated the permissive effect of insulin on muscle protein kinetics, and the enhanced insulin sensitizing effect of chromium. In the presence of adequate whole protein and/or essential amino acids (EAA), insulin has a stimulatory effect on muscle protein synthesis, whereas in conditions of lower blood EAA concentrations, insulin has an inhibitory effect on protein breakdown. In this study, we determined the effect of an amylopectin/chromium (ACr) complex on changes in plasma concentrations of EAA, insulin, glucose, and the fractional rate of muscle protein synthesis (FSR)...
2017: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/28194065/adverse-events-during-apheresis-procedures-audit-at-a-tertiary-hospital
#6
Kanchan Dogra, Parag Fulzele, Diptiranjan Rout, Rahul Chaurasia, Poonam Coshic, Kabita Chatterjee
Apheretic platelets are better quality blood components which reduce donor exposure and chances of TTIs to transfusion recipients when compared to the whole blood derived components. Though safe, these apheretic donations are associated with donor adverse events. We evaluated the incidence of such adverse events associated with the modern apheresis procedures that would provide an insight as well as help formulating preventive steps to avoid frequent occurrences of such events. This prospective audit-based observational study was conducted over 1 year...
March 2017: Indian Journal of Hematology & Blood Transfusion
https://www.readbyqxmd.com/read/28194064/therapeutic-plasma-exchange-in-patients-with-neurologic-disorders-review-of-63-cases
#7
Anil Tombak, Mehmet Ali Uçar, Aydan Akdeniz, Arda Yilmaz, Hakan Kaleagası, Mehmet Ali Sungur, Eyup Naci Tiftik
Therapeutic plasma exchange (TPE) is a procedure that reduces circulating autoantibodies of the patients. TPE is commonly used in neurological disorders where autoimmunity plays a major role. We report our experience with regard to the indications, adverse events and outcomes of plasma exchange in neurological disorders. Sixty-three patients were included to this retrospective study. Median age was 48 years (range 1-85), there was a predominance of males. Neurological indications included Guillain-Barrè syndrome (n = 22), myasthenia gravis (n = 21), chronic inflammatory demyelinating polyneuropathy (n = 7), polymyositis (n = 3), multifocal motor neuropathy (n = 2), acute disseminated encephalomyelitis (n = 2), neuromyelitis optica (n = 2), multiple sclerosis (n = 2), limbic encephalitis (n = 1) and transverse myelitis (n = 1)...
March 2017: Indian Journal of Hematology & Blood Transfusion
https://www.readbyqxmd.com/read/28188242/diagnosis-of-endocrine-disease-steroid-hormone-analysis-in-diagnosis-and-treatment-of-dsd-position-paper-of-eu-cost-action-bm-1303-dsdnet
#8
Alexandra Kulle, Nils Krone, Paul-Martin Holterhus, Gerhard Schuler, Ronda Greaves, Anders Juul, Yolanda de Rijke, Michaela Hartmann, Alessandro Saba, Olaf Hiort, Stefan Wudy
Disorders or differences in sex development (DSD) comprise a heterogeneous group of conditions with an atypical sex development. For optimal diagnosis highly specialized laboratory analyses are required across European countries. Working group 3 of EU COST (European Cooperation in Science and Technology) Action BM 1303 "DSDnet" "Harmonisation of Laboratory Assessment" has developed recommendations on laboratory assessment for DSD regarding the use of technologies and analytes to be investigated. This position paper on steroid hormone analysis in diagnosis and treatment of DSD was compiled by a group of specialists in DSD and/or hormonal analysis, either from participating European Countries or international partner countries...
February 10, 2017: European Journal of Endocrinology
https://www.readbyqxmd.com/read/28188006/changes-in-hemostasis-caused-by-different-replacement-fluids-and-outcome-in-therapeutic-plasma-exchange-in-pediatric-patients-in-a-retrospective-single-center-study
#9
REVIEW
Volker Witt, Herbert Pichler, Elisabeth Beiglboeck, Friedrich Kursten, Lisa Weidner
BACKGROUND: Therapeutic plasma exchange (TPE) is a generally accepted and frequently performed procedure for numerous therapeutic indications in adults. Slowly, TPE is also becoming more and more popular in the treatment of pediatric patients. Although, we know that TPE is safe in pediatric patients, the outcome of children treated with TPE is rarely reported. Furthermore, there are only general recommendations regarding the plasma replacement fluid for children and these are adopted from adults...
January 19, 2017: Transfusion and Apheresis Science
https://www.readbyqxmd.com/read/28187200/ligand-induced-dynamics-of-heterotrimeric-g-protein-coupled-receptor-like-kinase-complexes
#10
Meral Tunc-Ozdemir, Alan M Jones
BACKGROUND: Arabidopsis, 7-transmembrane Regulator of G signaling protein 1 (AtRGS1) modulates canonical G protein signaling by promoting the inactive state of heterotrimeric G protein complex on the plasma membrane. It is known that plant leucine-rich repeat receptor-like kinases (LRR RLKs) phosphorylate AtRGS1 in vitro but little is known about the in vivo interaction, molecular dynamics, or the cellular consequences of this interaction. METHODS: Therefore, a subset of the known RLKs that phosphorylate AtRGS1 were selected for elucidation, namely, BAK1, BIR1, FLS2...
2017: PloS One
https://www.readbyqxmd.com/read/28183441/similar-metabolic-response-to-lower-versus-upper-body-interval-exercise-or-endurance-exercise
#11
Monique E Francois, Matthew J Graham, Evelyn B Parr, Nancy J Rehrer, Samuel J E Lucas, Stasinos Stavrianeas, James D Cotter
PURPOSE: To compare energy use and substrate partitioning arising from repeated lower- versus upper-body sprints, or endurance exercise, across a 24-h period. METHODS: Twelve untrained males (24±4 y) completed three trials in randomized order: (1) repeated sprints (five 30-s Wingate, 4.5-min recovery) on a cycle ergometer (SITLegs); (2) 50-min continuous cycling at 65% V̇O2max (END); (3) repeated sprints on an arm-crank ergometer (SITArms). Respiratory gas exchange was assessed before and during exercise, and at eight points across 22h of recovery...
March 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/28183359/unexpected-extrapyramidal-symptoms-and-pulmonary-aspergillosis-in-exertional-heatstroke-with-fulminant-liver-failure-a-case-report
#12
Jie Jiao, Feihu Zhou, Hongjun Kang, Chao Liu, Mengmeng Yang, Jie Hu
BACKGROUND: Exertional heatstroke is a life-threatening condition with high mortality because of the rapid progress of multiple organ dysfunction syndrome even if aggressive treatments are initiated rapidly. Mild to moderate hepatic injury is common in exertional heatstroke, while fulminant liver failure is rare. Extrapyramidal symptoms and pulmonary aspergillosis secondary to liver failure induced by exertional heatstroke have never been reported in prior cases. CASE PRESENTATION: A 25-year-old Han Chinese man presented with exertional heatstroke with fulminant liver failure, subsequent pulmonary aspergillosis, and extrapyramidal symptoms...
February 10, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/28183045/new-process-for-purifying-high-purity-%C3%AE-1-antitrypsin-from-cohn-fraction-iv-by-chromatography-a-promising-method-for-the-better-utilization-of-plasma
#13
Chaoji Huangfu, Jinchao Zhang, Yuyuan Ma, Junting Jia, Maomin Lv, Xiong Zhao, Jingang Zhang
α1-antitrypsin (AAT) is a 52kDa serine protease inhibitor that is abundant in plasma. It is synthesized mainly by hepatic cells, and widely used to treat patients with emphysema due to congenital deficiency of AAT. A new isolation method for the purification of AAT from Cohn Fraction IV (Cohn F IV) is described. Cohn F IV is usually discarded as a byproduct from Cohn process. Using Cohn F IV as starting material does not interfere with the production of other plasma proteins and the cost of purification could be reduced greatly...
February 1, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28179458/individual-s-acylated-cysteines-differentially-contribute-to-h-ras-endomembrane-trafficking-and-acylation-deacylation-cycles
#14
Maria P Pedro, Aldo A Vilcaes, Guillermo A Gomez, Jose L Daniotti
S-acylation/deacylation cycles and vesicular transport are critical for an adequate subcellular distribution of S-acylated Ras proteins. H-Ras is dually acylated on cysteines 181 and 184, but it is unknown how these residues individually contribute to H-Ras trafficking. In this study, we characterized the acylation and deacylation rates and membrane trafficking of mono-acylated H-Ras mutants to analyze their contributions to H-Ras plasma membrane and endomembrane distribution. We demonstrated that dually acylated H-Ras interacts with acyl-protein thioesterases (APT) 1 and 2 at the plasma membrane...
February 8, 2017: Molecular Biology of the Cell
https://www.readbyqxmd.com/read/28179147/structural-basis-of-pdz-mediated-chemokine-receptor-cxcr2-scaffolding-by-guanine-nucleotide-exchange-factor-pdz-rhogef
#15
Nicholas Spellmon, Joshua Holcomb, Andrea Niu, Vishakha Choudhary, Xiaonan Sun, Yingxue Zhang, Junmei Wan, Maysaa Doughan, Stephanie Hayden, Fatme Hachem, Joseph Brunzelle, Chunying Li, Zhe Yang
The CXC chemokine receptor 2 (CXCR2) is a G protein coupled receptor mediating interleukin-8 chemotactic signaling and plays an important role in neutrophil mobility and tumor migration. However, efficient CXCR2 signaling requires PDZ domain-mediated scaffolding of signaling complexes at the plasma membrane and functional coupling of the signaling to specific downstream signaling pathways, in which only one PDZ protein has been characterized to interact with CXCR2. Here, we identified five novel CXCR2-binding PDZ-containing proteins, among which PDZ-RhoGEF is of particular interest because this PDZ and RGS-containing guanine nucleotide exchange factor (GEF) is also involved in cell signaling and mobility...
February 5, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28178155/complement-mediated-thrombotic-microangiopathy-secondary-to-sepsis-induced-disseminated-intravascular-coagulation-successfully-treated-with-eculizumab-a-case-report
#16
Tomohiro Abe, Akira Sasaki, Taichiro Ueda, Yoshitaka Miyakawa, Hidenobu Ochiai
Secondary thrombotic microangiopathies (TMAs) are induced by several underlying conditions; most are resolved by treating background disease. Eculizumab is a human monoclonal antibody that blocks the final stage of the complement system and effectively treats atypical hemolytic uremic syndrome (aHUS). In this report, we present a patient with TMA secondary to sepsis- induced coagulopathy, who was successfully treated with eculizumab.A 44-year-old woman, who had no special medical history or familial history of TMAs, was admitted on suspicion of septic shock...
February 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28176826/annexin-a5-organized-in-2d-network-at-the-plasmalemma-eases-human-trophoblast-fusion
#17
Severine A Degrelle, Pascale Gerbaud, Ludovic Leconte, Fatima Ferreira, Guillaume Pidoux
Only a limited number of human cells can fuse to form a multinucleated syncytium. Cell fusion occurs as part of the differentiation of some cell types, including myotubes in muscle and osteoclasts in remodeling bone. In the differentiation of the human placenta, mononuclear cytotrophoblasts aggregate and fuse to form endocrinologically active, non-proliferative, multinucleated syncytia. These syncytia allow the exchange of nutrients and gases between the maternal and fetal circulation. Alteration of syncytial formation during pregnancy affects fetal growth and the outcome of the pregnancy...
February 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28174541/regulation-of-connexin-based-channels-by-fatty-acids
#18
REVIEW
Carlos Puebla, Mauricio A Retamal, Rodrigo Acuña, Juan C Sáez
In this mini-review, we briefly summarize the current knowledge about the effects of fatty acids (FAs) on connexin-based channels, as well as discuss the limited information about the impact FAs may have on pannexins (Panxs). FAs regulate diverse cellular functions, some of which are explained by changes in the activity of channels constituted by connexins (Cxs) or Panxs, which are known to play critical roles in maintaining the functional integrity of diverse organs and tissues. Cxs are transmembrane proteins that oligomerize into hexamers to form hemichannels (HCs), which in turn can assemble into dodecamers to form gap junction channels (GJCs)...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28173620/proteasome-inhibitor-carfilzomib-based-therapy-for-antibody-mediated-rejection-of-the-pulmonary-allograft-use-and-short-term-findings
#19
Christopher R Ensor, Samuel A Yousem, Marilyn Marrari, Matthew R Morrell, Massimo Mangiola, Joseph M Pilewski, Jonathan D'Cunha, Stephen R Wisniewski, Raman Venkataramanan, Adriana Zeevi, John F McDyer
We present this observational study of lung transplant recipients (LTR) treated with Carfilzomib (CFZ)-based therapy for antibody-mediated rejection (AMR) of the lung. Patients were considered responders to CFZ if C1q-fixing ability of their immunodominant (ID) DSA was suppressed after treatment. Treatment consisted of CFZ plus plasma exchange and immunoglobulins. Fourteen LTRs underwent CFZ for 20 ID DSA AMR. Ten (71.4%) of LTRs responded to CFZ. DSA IgG MFI fell from 7664 (IQR 3230-11874) to 1878 (653-7791) after therapy (p=0...
February 7, 2017: American Journal of Transplantation
https://www.readbyqxmd.com/read/28168652/impaired-tissue-oxygenation-in-metabolic-syndrome-requires-increased-microvascular-perfusion-heterogeneity
#20
P Mason McClatchey, Fan Wu, I Mark Olfert, Christopher G Ellis, Daniel Goldman, Jane E B Reusch, Jefferson C Frisbee
Metabolic syndrome (MS) in obese Zucker rats (OZR) is associated with impaired skeletal muscle performance and blunted hyperemia. Studies suggest that reduced O2 diffusion capacity is required to explain compromised muscle performance and that heterogeneous microvascular perfusion distribution is critical. We modeled tissue oxygenation during muscle contraction in control and OZR skeletal muscle using physiologically realistic relationships. Using a network model of Krogh cylinders with increasing perfusion asymmetry and increased plasma skimming, we predict increased perfusion heterogeneity and decreased muscle oxygenation in OZR, with partial recovery following therapy...
February 6, 2017: Journal of Cardiovascular Translational Research
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