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Immunoadsorption

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https://www.readbyqxmd.com/read/29147891/long-term-presence-of-angiotensin-ii-type-1-receptor-autoantibody-reduces-aldosterone-production-by-triggering-ca-2-overload-in-h295r-cells
#1
Jinghui Lei, Suli Zhang, Pengli Wang, Yang Liao, Jingwei Bian, Xiaochen Yin, Ye Wu, Lina Bai, Feng Wang, Xiaoli Yang, Huirong Liu
Preeclamptic women are reported to have inadequate plasma volume expansion coupled with a suppressed secretion of aldosterone; however, the specific mechanism of preeclampsia remains unclear. We demonstrated that the presence of long-term angiotensin II type 1 receptor autoantibody (AT1-AA) reduces aldosterone production by triggering a Ca(2+) overload in H295R cells. AT1-AA was discovered in preeclamptic women and reported to activate AT1R, and consequently elevate intracellular Ca(2+). We found that AT1-AA significantly prolonged the time of intracellular Ca(2+) elevation...
November 16, 2017: Immunologic Research
https://www.readbyqxmd.com/read/29132070/sixteen-year-history-of-rituximab-therapy-for-1085-pemphigus-vulgaris-patients-a-systematic-review
#2
REVIEW
Soheil Tavakolpour, HamidReza Mahmoudi, Kamran Balighi, Robabeh Abedini, Maryam Daneshpazhooh
Pemphigus vulgaris (PV) is a rare autoimmune disease due to the production of pathogenic autoantibodies directed against desmoglein 1 and 3, usually affecting both skin and mucous membranes. Recently, rituximab, a chimeric IgG1 monoclonal antibody which targets the CD20 molecules have been regarded as a promising treatment for PV. In this study, a systematic review was conducted to conclude on how and which PV patients could benefit from rituximab infusion. Search in PubMed results in 114 relevant studies, which met the criteria...
November 10, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/29107213/current-and-future-treatment-options-for-pemphigus-is-it-time-to-move-towards-more-effective-treatments
#3
REVIEW
Soheil Tavakolpour
Systemic administration of corticosteroid (CS) remains the standard gold treatment for pemphigus. However, because of several long-term adverse effects, steroid-sparing agents are usually prescribed in combination with CSs. Despite the high number of available studies, the choice of best drugs to treat pemphigus remains controversial. Therapeutic approaches for pemphigus can be divided into traditional treatment and emerging ones. Personalized medicine, which aims to increase the efficacy as well as reduce adverse effects of treatments, could be considered as the future option...
December 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/29096850/low-rate-of-infectious-complications-following-immunoadsorption-therapy-without-regular-substitution-of-intravenous-immunoglobulins
#4
Sergey Tselmin, Ulrich Julius, Stefan R Bornstein, Bernd Hohenstein
INTRODUCTION: Immunoadsorption (IA) is increasingly used instead of plasma exchange due to lower risk of side effects and a higher selectivity. As a consequence of the reduction of immunoglobulins (Ig), the rate of infectious complications might increase in those patients. We therefore aimed to investigate the infection rate following IA without intravenous IG (IVIG) substitution in our apheresis center, where patients do not receive IVIG on a regular basis. MATERIAL AND METHODS: We conducted a retrospective analysis of the IA treatments performed between 2010 and 2015 without IVIG substitution and collected data on patient age, diagnosis, number of IA treatments, serum levels of Ig, total protein, albumin, C-reactive protein (CRP) and infectious complications that occurred within 2 months after the IA treatment cycle...
November 2017: Atherosclerosis. Supplements
https://www.readbyqxmd.com/read/29096849/successful-and-well-tolerated-bi-weekly-immunoadsorption-regimen-in-pemphigus-vulgaris
#5
Jenny Dietze, Bernd Hohenstein, Sergey Tselmin, Ulrich Julius, Stefan R Bornstein, Stefan Beissert, Claudia Günther
BACKGROUND: Pemphigus vulgaris is a chronic autoimmune disease characterized by blisters and erosions forming in the mucous membranes and the skin. Many patients are severely impaired by pain, weight loss and increased risk of infections. The disease is mediated by specific autoantibodies directed against desmogleins that contribute to connect keratinocytes in the epidermis. Autoantibody deposition in the skin causes inflammation and intraepidermal akantholysis. The concentration of autoantibodies in serum correlates with disease activity...
November 2017: Atherosclerosis. Supplements
https://www.readbyqxmd.com/read/29096848/immunoadsorption-for-treatment-of-severe-atopic-dermatitis
#6
Joanna Wegner, Julia Weinmann-Menke, Esther von Stebut
Atopic dermatitis (AD) is a common disease affecting up to 10-20% of the population with the largest disease burden in childhood. Treatment options include basic emollient treatment, topical as well as systemic immunosuppressants. The pathogenesis is complex and among various triggers, genetic predisposition and immunological alterations contribute to development of disease. Atopy is common in patients with AD and many patients have high levels of Immunoglobulin E (IgE), some of which recognizes exogenous or auto/self-allergens...
November 2017: Atherosclerosis. Supplements
https://www.readbyqxmd.com/read/29096847/immunoadsorption-for-autoimmune-encephalitis
#7
Cordula Fassbender, Reinhard Klingel, Wolfgang Köhler
Autoimmune encephalitis is a severe inflammatory disorder of the brain. The discovery that several non-infectious forms of encephalitis are associated with autoantibodies was a breakthrough in the care of this previously untreatable group of patients. The correlation of antibody type and titer with pattern and severity of symptoms was essential for the initiation of immunotherapies. First line therapy consists of steroids, intravenous immunoglobulins, plasma exchange or immunoadsorption. Rapid elimination of autoantibodies using selective immunoadsorption and avoiding the disadvantage of plasma substitution is a pathophysiologically guided therapeutic approach, and has been proven to be an effective therapeutic option as part of multimodal immunotherapy...
November 2017: Atherosclerosis. Supplements
https://www.readbyqxmd.com/read/29096846/comparing-the-efficacy-of-three-techniques-to-reduce-isoagglutinin-titers-in-ab0-incompatible-kidney-transplant-recipients
#8
S P Parmentier, E Rosenkranz, H Schirutschke, M Opgenoorth, C Quick, K Hoelig, A Rosner, B Hohenstein, C Hugo, J Passauer
ABO incompatible (ABOi) organ transplantation requires pre-transplant reduction of the recipient's IgG and IgM isoagglutinin titer against the donor to prevent hyperacute rejection. Over the past four years we primarily used unspecific IgG immunoadsorption (IA) for this purpose and combined this selectively with membrane filtration (IAc) to reduce IgM isoagglutinines. In patients with an initial IgG titer against donor below 1:64, plasma exchange (PE) was initiated. In this retrospective analysis covering January 2012 to August 2015 we compared how efficiently IgG and IgM isoagglutinines in a total of 22 ABOi kidney transplant recipients were reduced by either IA (n = 75 sessions), IAc (n = 14 sessions) or PE (n = 40 sessions)...
November 2017: Atherosclerosis. Supplements
https://www.readbyqxmd.com/read/29094388/peptide-gam-immunoadsorption-therapy-in-primary-membranous-nephropathy-prism-phase-ii-trial-investigating-the-safety-and-feasibility-of-peptide-gam-immunoadsorption-in-anti-pla2-r-positive-primary-membranous-nephropathy
#9
Patrick Hamilton, Durga Kanigicherla, Prasanna Hanumapura, Lars Walz, Dieter Kramer, Moritz Fischer, Paul Brenchley, Sandip Mitra
INTRODUCTION: Membranous nephropathy (MN) is among the most common causes of nephrotic syndrome in adults worldwide. Most patients have primary MN (PMN), an autoimmune condition associated with the IgG anti-PLA2 R autoantibody. For patients with severe disease, standard of care continues to be a 6-month regime of rotating high dose steroids and immunosuppression that comes with a significant side-effect profile. Immunoadsorption is a relatively safe procedure for the extracorporeal removal of specific immunoglobulins without the need for medications...
November 2, 2017: Journal of Clinical Apheresis
https://www.readbyqxmd.com/read/29054981/immunoadsorption-in-anti-gbm-glomerulonephritis-case-report-in-a-child-and-literature-review
#10
REVIEW
Guillaume Dorval, Mathilde Lion, Sophie Guérin, Saoussen Krid, Louise Galmiche-Rolland, Rémi Salomon, Olivia Boyer
Antiglomerular basement membrane glomerulonephritis (anti-GBM GN) is a rare autoimmune disease that is characterized by rapidly progressive glomerulonephritis that may be associated with pulmonary hemorrhage. Anti-GBM GN is caused by autoantibodies (classically type G immunoglobulin) directed against the α3 subunit of type IV collagen. Without any appropriate treatment, the disease is generally fulminant, and patient and kidney survival is poor. The current guidelines recommend the use of plasma exchanges and immunosuppressive drugs...
November 2017: Pediatrics
https://www.readbyqxmd.com/read/28992235/treatment-by-immunoadsorption-for-recurrent-focal-segmental-glomerulosclerosis-after-paediatric-kidney-transplantation-a-multicentre-french-cohort
#11
Lise Allard, Theresa Kwon, Saoussen Krid, Justine Bacchetta, Arnaud Garnier, Robert Novo, Georges Deschenes, Rémi Salomon, Gwenaëlle Roussey, Emma Allain-Launay
Background: Primary focal segmental glomerulosclerosis (FSGS) frequently recurs after kidney transplantation (KTx) in children. This can lead to delayed graft loss. As the management of children with recurrent FSGS is not well established, apheresis strategies could be a cornerstone to control the disease. Immunoadsorption (IA) is a recent apheresis therapy. There have been few studies examining IA in this setting. We report the results of IA for management of recurrent FSGS after KTx in children in France...
July 28, 2017: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/28972547/human-immunodeficiency-virus-proteins-mimic-human-t-cell-receptors-inducing-cross-reactive-antibodies
#12
Robert Root-Bernstein
Human immunodeficiency virus (HIV) hides from the immune system in part by mimicking host antigens, including human leukocyte antigens. It is demonstrated here that HIV also mimics the V-β-D-J-β of approximately seventy percent of about 600 randomly selected human T cell receptors (TCR). This degree of mimicry is greater than any other human pathogen, commensal or symbiotic organism studied. These data suggest that HIV may be evolving into a commensal organism just as simian immunodeficiency virus has done in some types of monkeys...
October 3, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28970002/immunoadsorption-for-collagen-and-rheumatic-diseases
#13
REVIEW
Ken Yamaji
The field of therapeutics has seen remarkable progress in the recent years, which has made mainstream drug treatment possible for collagen and rheumatic diseases. However, treatment of intractable cases where drug effectiveness is poor is a challenge. Furthermore, organ damage, concurrent illnesses or allergic reactions make adequate drug therapy impossible. For such cases, therapeutic apheresis is very significant, and it is important how this should be valued related to drug therapies. Therapeutic apheresis for collagen and rheumatic diseases involves the removal of factors that cause and exacerbate the disease; the aim of immunoadsorption, in particular, is to improve the clinical condition of patients with autoimmune disease by selectively removing pathogenic immune complexes and autoantibodies from their plasma...
August 30, 2017: Transfusion and Apheresis Science
https://www.readbyqxmd.com/read/28951873/multiple-targets-for-novel-therapy-of-fsgs-associated-with-circulating-permeability-factor
#14
REVIEW
Virginia J Savin, Mukut Sharma, Jianping Zhou, David Genochi, Ram Sharma, Tarak Srivastava, Amna Ilahe, Pooja Budhiraja, Aditi Gupta, Ellen T McCarthy
A plasma component is responsible for altered glomerular permeability in patients with focal segmental glomerulosclerosis. Evidence includes recurrence after renal transplantation, remission after plasmapheresis, proteinuria in infants of affected mothers, transfer of proteinuria to experimental animals, and impaired glomerular permeability after exposure to patient plasma. Therapy may include decreasing synthesis of the injurious agent, removing or blocking its interaction with cells, or blocking signaling or enhancing cell defenses to restore the permeability barrier and prevent progression...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28927772/-antiglomerular-basement-disease-in-children-literature-review-and-therapeutic-options
#15
G Dorval, S Guérin, L Berteloot, S Krid, R Salomon, L Galmiche-Rolland, O Boyer
Antiglomerular basement membrane glomerulonephritis is a rare autoimmune disease characterized by rapidly progressive glomerulonephritis that may be associated with pulmonary hemorrhage (Goodpasture syndrome). The disease is caused by autoantibodies (classically IgGs) directed against the α3 subunit of type IV collagen. This is a rare disease in the adult population and extremely rare in children, with a reported cumulative annual incidence at 1/10(6) people/year. Among scarce reported pediatric cases (n=31), most are girls (M/F sex ratio, 1:4), and the mean age at diagnoses is 9...
September 15, 2017: Archives de Pédiatrie: Organe Officiel de la Sociéte Française de Pédiatrie
https://www.readbyqxmd.com/read/28923775/immunoadsorption-using-immusorba-tr-and-ph
#16
REVIEW
Ryuichiro Hirano, Noriko Hirata
Immusorba TR (IM-TR) and PH (IM-PH) were developed as immunoadsorbents from nonbiological materials as affinity ligands for removal of pathogenic substances. The immunoadsorbents in IM-TR and IM-PH are immobilized on a polyvinyl alcohol gel with tryptophan and phenylalanine, respectively, as a ligand. IM-TR is mainly clinically applied to autoimmune neurological diseases such as myasthenia gravis, Guillain-Barré syndrome, and multiple sclerosis. IM-PH is also applied to neurological diseases but mainly to rheumatic diseases such as rheumatoid arthritis and systemic lupus erythematosus...
August 30, 2017: Transfusion and Apheresis Science
https://www.readbyqxmd.com/read/28919008/immunoadsorption-in-neurological-disorders
#17
REVIEW
Satoru Oji, Kyoichi Nomura
In recent years, immunoadsorption has been increasingly recognized as an alternative to therapeutic plasma exchange and used for the treatment of neurological disorders such as Guillain-Barré syndrome, chronic inflammatory demyelinating polyneuropathy, myasthenia gravis, neuromyelitis optica spectrum disorders, and multiple sclerosis, as well as autoimmune encephalitis. Unlike therapeutic plasma exchange, which requires fluid replacement with a blood solution such as fresh frozen plasma or albumin, immunoadsorption is a blood purification technique that enables the selective removal of humoral factors from separated plasma through a high-affinity adsorbent with tryptophan or phenylalanine...
August 26, 2017: Transfusion and Apheresis Science
https://www.readbyqxmd.com/read/28916402/the-mechanisms-of-rejection-in-solid-organ-transplantation
#18
REVIEW
Emanuele Cozzi, Anna Colpo, Giustina De Silvestro
Organ transplantation represents the preferred treatment option for many patients in terminal organ failure. The half-life of transplanted organs, however, is still far from being satisfactory with the vast majority of the organs failing within the first two decades following transplantation. At this stage, it has become apparent that rejection (prevalently mediated by humoral events) remains the primary cause of graft loss after the first year. In this light, studies are underway to better comprehend the immune events underlying graft rejection and novel immunosuppressive strategies are being explored...
July 8, 2017: Transfusion and Apheresis Science
https://www.readbyqxmd.com/read/28912035/specific-removal-of-autoantibodies-by-extracorporeal-immunoadsorption-ameliorates-experimental-autoimmune-myasthenia-gravis
#19
Konstantinos Lazaridis, Ioannis Dalianoudis, Vasiliki Baltatzidi, Socrates J Tzartos
Myasthenia gravis (MG) is caused by autoantibodies, the majority of which target the muscle acetylcholine receptor (AChR). Plasmapheresis and IgG-immunoadsorption are useful therapy options, but are highly non-specific. Antigen-specific immunoadsorption would remove only the pathogenic autoantibodies, reducing the possibility of side effects while maximizing the benefit. We have extensively characterized such adsorbents, but in vivo studies are missing. We used rats with experimental autoimmune MG to perform antigen-specific immunoadsorptions over three weeks, regularly monitoring symptoms and autoantibody titers...
November 15, 2017: Journal of Neuroimmunology
https://www.readbyqxmd.com/read/28877546/clinical-features-and-evolution-of-juvenile-myasthenia-gravis-in-a-french-cohort
#20
Coline Barraud, Isabelle Desguerre, Christine Barnerias, Cyril Gitiaux, Christophe Boulay, Brigitte Chabrol
INTRODUCTION: In this study we determined the clinical, paraclinical, and treatment-related features of juvenile myasthenia gravis (JMG) as well as the clinical course in a cohort of French children. METHODS: We conducted a retrospective study of 40 patients with JMG at 2 French pediatric neurology departments from April 2004 to April 2014. RESULTS: Among the patients, 70% had generalized JMG, 52% had positive acetylcholine receptor antibodies, 8% had muscle-specific kinase antibodies, and 40% were seronegative...
September 6, 2017: Muscle & Nerve
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