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https://www.readbyqxmd.com/read/27922693/a-novel-pdgf-receptor-inhibitor-eluting-stent-attenuates-in-stent-neointima-formation-in-a-rabbit-carotid-model
#1
Chen Huang, Haijun Mei, Min Zhou, Xiaobing Zheng
A novel drug-eluting stent (DES) is required to target vascular smooth muscle cells (SMCs) without harming endothelial cells (ECs). Platelet-derived growth factor (PDGF) is critical for the proliferation and migration of SMCs. Sunitinib [a PDGF receptor (PDGFR) tyrosine kinase inhibitor]‑eluting stents may therefore inhibit neointimal formation. The aim of the present study was to examine the stent‑based delivery of sunitinib in a rabbit carotid model; in addition, the effects of sunitinib were evaluated in vitro...
December 5, 2016: Molecular Medicine Reports
https://www.readbyqxmd.com/read/27922607/endocytosis-following-dopamine-d2-receptor-activation-is-critical-for-neuronal-activity-and-dendritic-spine-formation-via-rabex-5-pdgfr%C3%AE-signaling-in-striatopallidal-medium-spiny-neurons
#2
N Shioda, Y Yabuki, Y Wang, M Uchigashima, T Hikida, T Sasaoka, H Mori, M Watanabe, M Sasahara, K Fukunaga
Aberrant dopamine D2 receptor (D2R) activity is associated with neuropsychiatric disorders, making those receptors targets for antipsychotic drugs. Here, we report that novel signaling through the intracellularly localized D2R long isoform (D2LR) elicits extracellular signal-regulated kinase (ERK) activation and dendritic spine formation through Rabex-5/platelet-derived growth factor receptor-β (PDGFRβ)-mediated endocytosis in mouse striatum. We found that D2LR directly binds to and activates Rabex-5, promoting early-endosome formation...
December 6, 2016: Molecular Psychiatry
https://www.readbyqxmd.com/read/27919468/somatic-gnaq-mutation-is-enriched-in-brain-endothelial-cells-in%C3%A2-sturge-weber-syndrome
#3
Lan Huang, Javier A Couto, Anna Pinto, Sanda Alexandrescu, Joseph R Madsen, Arin K Greene, Mustafa Sahin, Joyce Bischoff
BACKGROUND: Sturge-Weber syndrome (SWS) is a rare congenital neurocutaneous disorder characterized by facial and extracraniofacial capillary malformations and capillary-venule malformations in the leptomeninges. A somatic mosaic mutation in GNAQ (c.548G>A; p.R183Q) was found in SWS brain and skin capillary malformations. Our laboratory showed endothelial cells in skin capillary malformations are enriched for the GNAQ mutation. The purpose of this study is to determine whether the GNAQ mutation is also enriched in endothelial cells in affected SWS brain...
October 21, 2016: Pediatric Neurology
https://www.readbyqxmd.com/read/27917714/antiplatelet-and-anticoagulation-treatment-in-patients-with-thrombocytopenia
#4
Nuccia Morici, Silvia Cantoni, Paola Vallerio, Marco Cattaneo, Stefano Savonitto
Thrombocytopenia (TP) is a common finding in patients hospitalized for cardiovascular causes and needing antiplatelet and anticoagulant therapies. However, TP is not only a numeric parameter, but mostly a dynamic condition affected by the patients' underlying disorders and concomitant treatments. Platelets are important players in the hemostatic process, taking part to both primary and secondary hemostasis. Although both TP and antithrombotic treatment contribute to the risk of bleeding, the complexity of the pathogenesis of bleeding events makes it difficult to predict them accurately simply based on these two parameters...
December 5, 2016: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/27914885/blind-percutaneous-liver-biopsy-in-infants-and-children-comparison-of-safety-and-efficacy-of-percussion-technique-and-ultrasound-assisted-technique
#5
Engy A Mogahed, Yasmeen A Mansy, Yasmeen Al Hawi, Rokaya El-Sayed, Mona El-Raziky, Hanaa El-Karaksy
BACKGROUND AND STUDY AIMS: Liver biopsy remains the most reliable method to diagnose various hepatic disorders in children. We aimed to assess the technical success and complication rate of ultrasound (US) assisted percutaneous liver biopsy versus transthoracic percussion guided technique in paediatrics. PATIENTS AND METHODS: This randomized controlled study included all cases performing liver biopsy at Paediatric Hepatology Unit, Cairo University Paediatric Hospital over 12months...
November 30, 2016: Arab Journal of Gastroenterology: the Official Publication of the Pan-Arab Association of Gastroenterology
https://www.readbyqxmd.com/read/27914214/antithrombin-improves-the-maternal-and-neonatal-outcomes-but-not-the-angiogenic-factors-in-extremely-growth-restricted-fetuses-at-28-weeks-of-gestation
#6
Midori Fujisaki, Ken Furuta, Masanao Ohhashi, Seishi Furukawa, Yuki Kodama, Yasuyuki Kawagoe, Hiroshi Sameshima, Tsuyomu Ikenoue
AIMS: Severe preterm fetal growth restriction (FGR) remote from term is problematic. We aimed to investigate the effect of maternally-administered antithrombin on maternal and neonatal outcomes. A prospective, one-arm, pilot study was performed in 14 women with severe FGR (≤5th centile) at <28 weeks of gestation, without hypertensive disorders. Maternal plasma concentrations of soluble Feline McDonough Sarcoma (FMS)-like trypsin kinase-1 (sFlt-1) and placental growth factor (PlGF) were measured and categorized into three groups: group 1; low sFlt-1 and high PlGF, group 2; moderate sFlt-1 and low PlGF, and group 3; high sFlt-1 and low PlGF...
December 3, 2016: Journal of Perinatal Medicine
https://www.readbyqxmd.com/read/27913546/diagnosing-von-willebrand-disease-genetic-analysis
#7
Anne Goodeve
Investigation of a patient with possible von Willebrand disease (VWD) includes a range of phenotypic analyses. Often, this is sufficient to discern disease type, and this will suggest relevant treatment. However, for some patients, phenotypic analysis does not sufficiently explain the patient's disorder, and for this group, genetic analysis can aid diagnosis of disease type. Polymerase chain reaction and Sanger sequencing have been mainstays of genetic analysis for several years. More recently, next-generation sequencing has become available, with the advantage that several genes can be simultaneously analyzed where necessary, eg, for discrimination of possible type 2N VWD or mild hemophilia A...
December 2, 2016: Hematology—the Education Program of the American Society of Hematology
https://www.readbyqxmd.com/read/27913490/heparin-induced-thrombocytopenia-research-and-clinical-updates
#8
Oluwatoyosi Onwuemene, Gowthami M Arepally
Heparin-induced thrombocytopenia (HIT) remains an important diagnosis to consider in hospitalized patients developing thrombocytopenia. HIT is an immune-mediated prothrombotic disorder caused by antibodies to platelet factor 4 (PF4) and heparin. Recent basic scientific studies have advanced our understanding of disease pathogenesis through studies of the PF4/heparin structure, immune mechanisms, and cellular basis of thrombosis. Clinical advances have also occurred in areas of HIT prevention, description of disease variants, and diagnostic strategies...
December 2, 2016: Hematology—the Education Program of the American Society of Hematology
https://www.readbyqxmd.com/read/27913488/platelets-in-liver-and-renal-disease
#9
Michele P Lambert
This review will discuss how 2 common and morbid conditions, renal disease and liver disease, alter platelet number and function. It will review the impact of thrombocytopenia on bleeding complications in patients with these disorders and whether the low platelet count actually correlates with bleeding risk. Emerging data also suggest that platelets are much more than bystanders in both renal and liver disease, but instead play an active role in the pathobiology of these disorders. This review will briefly cover the emerging information on novel roles of platelets in the biology of renal and liver disease...
December 2, 2016: Hematology—the Education Program of the American Society of Hematology
https://www.readbyqxmd.com/read/27911985/hemorrhagic-hemostatic-and-thromboelastometric-disorders-in-35-dogs-with-a-clinical-diagnosis-of-leptospirosis-a-prospective-study
#10
A Barthélemy, M Magnin, C Pouzot-Nevoret, J-M Bonnet-Garin, M Hugonnard, I Goy-Thollot
BACKGROUND: Leptospirosis in dogs is occasionally associated with a hemorrhagic syndrome, the pathophysiology of which is not fully understood. HYPOTHESIS/OBJECTIVES: To characterize hematologic, hemostatic, and thromboelastometric abnormalities in dogs with leptospirosis and to study their association with hemorrhagic diatheses and outcomes. ANIMALS: Thirty-five client-owned dogs. METHODS: A prospective observational single cohort study was conducted...
December 2, 2016: Journal of Veterinary Internal Medicine
https://www.readbyqxmd.com/read/27908218/risk-factors-for-dural-tears-a-study-of-elective-spine-surgery
#11
Meghan E Murphy, Panagiotis Kerezoudis, Mohammed Ali Alvi, Brandon A McCutcheon, Patrick R Maloney, Lorenzo Rinaldo, Daniel Shepherd, Daniel S Ubl, William E Krauss, Elizabeth B Habermann, Mohamad Bydon
OBJECTIVE: This study moves beyond previous cohort studies and benchmark data by studying a population of elective spine surgery from a multicenter registry in an effort to validate, disprove, and/or identify novel risk factors for dural tears. METHODS: A retrospective cohort analysis queried a multicenter registry for patients with degenerative spinal diagnoses undergoing elective spinal surgery from 2010-2014. Multivariable logistic regression analysis interrogated for independent risk factors of dural tears...
December 2, 2016: Neurological Research
https://www.readbyqxmd.com/read/27906940/a-new-technique-for-the-treatment-of-lumbar-facet-joint-syndrome-using-intra-articular-injection-with-autologous-platelet-rich-plasma
#12
Jiuping Wu, Zhenwu Du, Yang Lv, Jun Zhang, Wei Xiong, Ruiqiang Wang, Rui Liu, Guizhen Zhang, Qinyi Liu
BACKGROUND AND OBJECTIVES: Lumbar facet joint syndrome is currently suggested to be a main source of axial low back pain, and a large portion of axial low back pain is caused by disorders in lumbar facet joints. Intra-articular injection is one of the most common treatment methods in the early clinical application. Therefore, we attempt to seek a new injectable material, autologous platelet rich plasma (PRP), to treat lumbar facet syndrome, as well as to assess its therapeutic effectiveness and safety...
November 2016: Pain Physician
https://www.readbyqxmd.com/read/27904611/selective-serotonin-reuptake-inhibitors-and-cardiovascular-events-a-systematic-review
#13
REVIEW
Mohammad Hassan Nezafati, Ali Eshraghi, Mohammad Vojdanparast, Saeed Abtahi, Pouya Nezafati
BACKGROUND: Given the importance of the role of depression in predicting the outcome of cardiovascular disorders, current medications for treating depression, particularly selective serotonin reuptake inhibitors (SSRIs), are taken into consideration. This study aimed to systematically review the published findings in the use of SSRIs and the risk for cardiac events. MATERIALS AND METHODS: An independent review of the Web of Science, PubMed, Scopus, Cochrane, CINAHL, index Copernicus, and Google Scholar, up to 2014, was performed...
2016: Journal of Research in Medical Sciences: the Official Journal of Isfahan University of Medical Sciences
https://www.readbyqxmd.com/read/27902998/autoimmune-cytopenias-diagnosis-management
#14
Christian P Nixon, Joseph D Sweeney
The autoimmune cytopenias are a related group of disorders in which differentiated hematopoietic cells are destroyed by the immune system. Single lineage disease is characterized by the production of autoantibodies against red cells (autoimmune hemolytic anemia [AIHA]), platelets (autoimmune thrombocytopenia [ITP]) and neutrophils (autoimmune neutropenia [AIN]) whereas multilineage disease may include various combinations of these conditions. Central to the genesis of this disease is the breakdown of central and/or peripheral tolerance, and the subsequent production of autoantibodies by both tissue and circulating self-reactive B lymphocytes with support from T helper lymphocytes...
December 1, 2016: Rhode Island Medical Journal
https://www.readbyqxmd.com/read/27901126/low-level-light-treatment-ameliorates-immune-thrombocytopenia
#15
Jingke Yang, Qi Zhang, Peiyu Li, Tingting Dong, Mei X Wu
Immune thrombocytopenia (ITP) is an immune-mediated acquired bleeding disorder characterized by abnormally low platelet counts. We reported here the ability of low-level light treatment (LLLT) to alleviate ITP in mice. The treatment is based on noninvasive whole body illumination 30 min a day for a few consecutive days by near infrared light (830 nm) transmitted by an array of light-emitting diodes (LEDs). LLLT significantly lifted the nadir of platelet counts and restored tail bleeding time when applied to two passive ITP models induced by anti-CD41 antibody...
November 30, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27896523/a-cd57-ctl-degranulation-assay-effectively-identifies-familial-hemophagocytic-lymphohistiocytosis-type-3-patients
#16
Masayuki Hori, Takahiro Yasumi, Saeko Shimodera, Hirofumi Shibata, Eitaro Hiejima, Hirotsugu Oda, Kazushi Izawa, Tomoki Kawai, Masataka Ishimura, Naoko Nakano, Ryutaro Shirakawa, Ryuta Nishikomori, Hidetoshi Takada, Satoshi Morita, Hisanori Horiuchi, Osamu Ohara, Eiichi Ishii, Toshio Heike
PURPOSE: Familial hemophagocytic lymphohistiocytosis type 3 (FHL3) is a genetic disorder that results in immune dysregulation. It requires prompt and accurate diagnosis. A natural killer (NK) cell degranulation assay is often used to screen for FHL3 patients. However, we recently encountered two cases of late-onset FHL3 carrying novel UNC13D missense mutations: in these cases, the degranulation assays using freshly isolated and interleukin (IL)-2-activated NK cells yielded contradictory results...
November 28, 2016: Journal of Clinical Immunology
https://www.readbyqxmd.com/read/27896136/attention-deficit-hyperactivity-disorder-suffers-from-mitochondrial-dysfunction
#17
Poonam Verma, Alpana Singh, Dominic Ngima Nthenge-Ngumbau, Usha Rajamma, Swagata Sinha, Kanchan Mukhopadhyay, Kochupurackal P Mohanakumar
BACKGROUND: Pathophysiology of attention-deficit hyperactivity disorder (ADHD) is not known, and therefore the present study investigated mitochondrial defects, if any in cybrids created from patients and control population. METHODS: To investigate mitochondrial pathology in ADHD, cybrids cell lines were created from ADHD probands and controls by fusing their platelets with ρ(0)-cells prepared from SH-SY5Y neuroblastoma cell line. Cellular respiration, oxidative stress, mitochondrial membrane potential and morphology were evaluated employing oxygraph, mitochondria-specific fluorescence staining and evaluation by FACS, and immunocytochemistry...
December 2016: BBA Clinical
https://www.readbyqxmd.com/read/27895669/myeloproliferative-disease-an-unusual-cause-of-raynaud-s-phenomenon-and-digital-ischaemia
#18
Celia Beynon, Gwenan Huws, Tom Lawson
We describe a 59-year-old female who presented with ischaemic digits, preceded by a 6-month history of Raynaud's phenomenon affecting her fingers and toes. There were no clinical or laboratory features of primary vasculitis or connective tissue disease, Doppler imaging was normal, and bloods were unremarkable aside from a platelet count of 786 × 109/L (150-400) and white cells of 16 × 109/L (4-11). In view of the thrombocytosis a JAK2 mutation assay was requested which confirmed a JAK2 V617F mutation, suggesting essential thrombocytosis (ET) as the cause...
2016: Case Reports in Medicine
https://www.readbyqxmd.com/read/27894125/intronic-polyadenylation-of-pdgfr%C3%AE-in-resident-stem-cells-attenuates-muscle-fibrosis
#19
Alisa A Mueller, Cindy T van Velthoven, Kathryn D Fukumoto, Tom H Cheung, Thomas A Rando
Platelet-derived growth factor receptor α (PDGFRα) exhibits divergent effects in skeletal muscle. At physiological levels, signalling through this receptor promotes muscle development in growing embryos and angiogenesis in regenerating adult muscle. However, both increased PDGF ligand abundance and enhanced PDGFRα pathway activity cause pathological fibrosis. This excessive collagen deposition, which is seen in aged and diseased muscle, interferes with muscle function and limits the effectiveness of gene- and cell-based therapies for muscle disorders...
November 28, 2016: Nature
https://www.readbyqxmd.com/read/27889498/bloc-2-subunit-hps6-deficiency-affects-the-tubulation-and-secretion-of-von-willebrand-factor-from-mouse-endothelial-cells
#20
Jing Ma, Zhe Zhang, Lin Yang, Janos Kriston-Vizi, Daniel F Cutler, Wei Li
Hermansky-Pudlak syndrome (HPS) is a recessive disorder with bleeding diathesis, which has been linked to platelet granule defects. Both platelet granules and endothelial Weibel-Palade bodies (WPBs) are members of lysosome-related organelles (LROs) whose formation is regulated by HPS protein associated complexes such as BLOC (biogenesis of lysosome organelles complex) -1, -2, -3, AP-3 (adaptor protein complex-3) and HOPS (homotypic fusion and protein sorting complex). Von Willebrand factor (VWF) is critical to hemostasis, which is stored in a highly-multimerized form as tubules in the WPBs...
October 21, 2016: Journal of Genetics and Genomics, Yi Chuan Xue Bao
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