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https://www.readbyqxmd.com/read/28932736/mean-platelet-volume-and-immature-platelet-fraction-in-autoimmune-disorders
#1
REVIEW
Deonilson Schmoeller, Maria Mercedes Picarelli, Terezinha Paz Munhoz, Carlos Eduardo Poli de Figueiredo, Henrique Luiz Staub
Mean platelet volume (MPV), measured using automated blood analysers, has been appraised as a potential biomarker in cardiovascular disease, diabetes mellitus, and cancer. The test, a useful tool in differentiation of thrombocytopenic states, has now been carried out for autoimmune disorders, but data are yet scarce. Controversial results have been obtained in systemic and organ-specific autoimmune disorders. Another test, the immature platelet fraction (IPF) reflects the amount of young, reticulated platelets...
2017: Frontiers in Medicine
https://www.readbyqxmd.com/read/28928091/p2y12-antibody-inhibits-platelet-activity-and-protects-against-thrombogenesis
#2
Nicole R Hensch, Zubair A Karim, Joshua Pineda, Nicole Mercado, Fatima Z Alshbool, Fadi T Khasawneh
Given that platelet hyperactivity is known to give rise to thrombotic disorders, new and/or novel antiplatelet therapies are constantly being developed to add to, or to complement the current arsenal of agents. To this end, adenosine diphosphate (ADP) is an important platelet activator that acts by binding to the G-protein coupled P2Y1 and P2Y12 receptors. Although the contribution of the P2Y12 receptor to the genesis of thrombosis is well established, the parenteral arsenal of drugs targeting this receptor in clinical use is limited to cangrelor...
September 16, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28923772/reference-intervals-of-citrated-native-whole-blood-thromboelastography-in-premature-neonates
#3
Mario Motta, Brunetta Guaragni, Elena Pezzotti, Carmen Rodriguez-Perez, Gaetano Chirico
BACKGROUND: Bleeding due to acquired coagulation disorders is a common complication in premature neonates. In this clinical setting, standard coagulation laboratory tests might be unsuitable to investigate the hemostatic function as they reflect the concentration of pro-coagulant proteins but not of anti-coagulant proteins. Thromboelastography (TEG), providing a more complete assessment of hemostasis, may be able to overcome some of these limitations. Unfortunately, experience on the use of TEG in premature neonates is very limited and, in particular in this population, reference ranges of TEG parameters have not been yet evaluated...
September 15, 2017: Early Human Development
https://www.readbyqxmd.com/read/28922227/incidence-and-risk-factors-of-coagulation-profile-derangement-after-liver-surgery-implications-for-the-use-of-epidural-analgesia-a-retrospective-cohort-study
#4
Pierre Jacquenod, Grégoire Wallon, Mathieu Gazon, Benjamin Darnis, Pierre Pradat, Victor Virlogeux, Olivier Farges, Frédéric Aubrun
BACKGROUND: Hepatic surgery is a major abdominal surgery. Epidural analgesia may decrease the incidence of postoperative morbidities. Hemostatic disorders frequently occur after hepatic resection. Insertion or withdrawal (whether accidental or not) of an epidural catheter during coagulopathic state may cause an epidural hematoma. The aim of the study is to determine the incidence of coagulopathy after hepatectomy, interfering with epidural catheter removal, and to identify the risk factors related to coagulopathy...
September 14, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28917657/oral-all-trans-retinoic-acid-plus-danazol-versus-danazol-as-second-line-treatment-in-adults-with-primary-immune-thrombocytopenia-a-multicentre-randomised-open-label-phase-2-trial
#5
Fei-Er Feng, Ru Feng, Min Wang, Jia-Min Zhang, Hao Jiang, Qian Jiang, Jin Lu, Hui Liu, Jun Peng, Ming Hou, Jian-Liang Shen, Jing-Wen Wang, Lan-Ping Xu, Kai-Yan Liu, Xiao-Jun Huang, Xiao-Hui Zhang
BACKGROUND: Primary immune thrombocytopenia is a severe bleeding disorder. About 50-85% of patients achieve initial remission from first-line therapies, but optimal second-line treatment remains a challenge. All-trans retinoic acid (ATRA) has an immunomodulatory effect on haemopoiesis, making it a possible treatment option. We aimed to evaluate the efficacy and safety of ATRA plus danazol versus danazol in non-splenectomised patients with corticosteroid-resistant or relapsed primary immune thrombocytopenia...
September 13, 2017: Lancet Haematology
https://www.readbyqxmd.com/read/28915060/long-non-coding-rna-lnrpt-is-regulated-by-pdgf-bb-and-modulates-proliferation-of-pulmonary-artery-smooth-muscle-cells
#6
Jidong Chen, Jiao Guo, Xiaolei Cui, Yan Dai, Zhixiong Tang, Junle Qu, J Usha Raj, Qinghua Hu, Deming Gou
Pulmonary artery hypertension (PAH) is a rare and fatal disorder with extensive remodeling of pulmonary arteries mediated by hyperproliferation of pulmonary artery smooth muscle cell (PASMC). Aberrant platelet-derived growth factor (PDGF) activity can lead to hyperproliferation of PASMC, however, little is known about the role of long noncoding RNA (lncRNA) in this process. Using RNA sequencing (RNA-seq), we identified 725 lncRNAs in rat PASMC (RPASMC), 95 of which were expressed differentially in response to PDGF-BB treatment...
September 15, 2017: American Journal of Respiratory Cell and Molecular Biology
https://www.readbyqxmd.com/read/28914800/effect-of-clotting-duration-and-temperature-on-bdnf-measurement-in-human-serum
#7
Patrizia Amadio, Leonardo Sandrini, Alessandro Ieraci, Elena Tremoli, Silvia Stella Barbieri
Brain-derived neurothrophic factor (BDNF) is a neurotrophin expressed in different tissues and cells, including neurons, endothelial cells, leukocytes, megakaryocytes and platelets. Modifications of BDNF in plasma and/or in serum are associated with neurodegenerative and psychiatric disorders, cardiovascular diseases, metabolic syndrome and with mortality risk. Indeed, changes in blood levels of BDNF may reflect those of its tissue of origin and/or promote pathological dysfunctions. The measurement of BDNF amount in plasma or in serum has been characterized with particular attention in the impact of different anti-coagulants, clotting duration, temperature (≤21 °C) and delay in blood sample centrifugation as well as in stability of storage...
September 15, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28912922/obstetric-outcomes-of-twin-pregnancies-in-japanese-women-aged-40-and-older
#8
Shunji Suzuki
BACKGROUND: The aim of this study was to compare the obstetric outcomes of twin pregnancies between Japanese women aged ≥ 40 years and their younger counterparts aged 25 - 29. METHODS: This was a retrospective study of twin pregnancies managed at Japanese Red Cross Katsushika Maternity Hospital between 2002 and 2016. Women aged 40 and older at delivery (n = 117) were compared with women aged 25 - 29 at delivery (n = 536). RESULTS: Although the women ≥ 40 years old were more likely to have increased risks of HELLP (hemolytic, elevated liver enzymes and low platelet) syndrome and very low birth weight neonates, there were no measurable differences in obstetric outcomes such as hypertensive disorders, premature delivery and neonatal asphyxia between the two groups...
October 2017: Journal of Clinical Medicine Research
https://www.readbyqxmd.com/read/28912161/disruption-of-bmal1-impairs-blood-brain-barrier-integrity-via-pericyte-dysfunction
#9
Ryota Nakazato, Kenji Kawabe, Daisuke Yamada, Shinsuke Ikeno, Michihiro Mieda, Shigeki Shimba, Eiichi Hinoi, Yukio Yoneda, Takeshi Takarada
Circadian rhythm disturbances are well-established in neurological diseases. However, how these disruptions cause homeostatic imbalances remains poorly understood. Brain and muscle aryl hydrocarbon receptor nuclear translocator-like protein 1 (Bmal1) is a major circadian clock transcriptional activator, and Bmal1 deficiency in male Bmal1nestin(-/-) mice induced marked astroglial activation without affecting the number of astrocytes in the brain and spinal cord. Bmal1 deletion caused blood-brain barrier (BBB) hyperpermeability with an age-dependent loss of pericyte coverage of blood vessels in the brain...
September 14, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28904675/von-willebrand-s-disease-case-report-and-review-of-literature
#10
REVIEW
Hanae Echahdi, Brahim El Hasbaoui, Mohamed El Khorassani, Aomar Agadr, Mohamed Khattab
Von Willebrand Disease (VWD) is the most common human inherited bleeding disorder due to a defect of Von Willebrand Factor (VWF), which a glycoprotein crucial for platelet adhesion to the subendothelium after vascular injury. VWD include quantitative defects of VWF, either partial (type 1 with VWF levels < 50 IU/dL) or virtually total (type 3 with undetectable VWF levels) and also qualitative defects of VWF (type 2 variants with discrepant antigenic and functional VWF levels). The most bleeding forms of VWD usually do not concern type 1 patients with the mildest VWF defects (VWF levels between 30 and 50IU/dL)...
2017: Pan African Medical Journal
https://www.readbyqxmd.com/read/28901996/intracranial-hemorrhage-in-congenital-bleeding-disorders
#11
Shadi Tabibian, Hoda Motlagh, Majid Naderi, Akbar Dorgalaleh
: Intracranial hemorrhage (ICH), as a life-threatening bleeding among all kinds of congenital bleeding disorders (CBDs), is a rare manifestation except in factor XIII (FXIII) deficiency, which is accompanied by ICH, early in life, in about one-third of patients. Most inherited platelet function disorders (IPFDs) are mild to moderate bleeding disorders that can never experience a severe bleeding as in ICH; however, Glanzmann's thrombasthenia, a common and severe inherited platelet function disorder, can lead to ICH and occasional death...
September 9, 2017: Blood Coagulation & Fibrinolysis: An International Journal in Haemostasis and Thrombosis
https://www.readbyqxmd.com/read/28901403/whole-wiskott%C3%A2-aldrich-syndrome-protein-gene-deletion-identified-by-high-throughput-sequencing
#12
Xiangling He, Runying Zou, Bing Zhang, Yalan You, Yang Yang, Xin Tian
Wiskott‑Aldrich syndrome (WAS) is a rare X‑linked recessive immunodeficiency disorder, characterized by thrombocytopenia, small platelets, eczema and recurrent infections associated with increased risk of autoimmunity and malignancy disorders. Mutations in the WAS protein (WASP) gene are responsible for WAS. To date, WASP mutations, including missense/nonsense, splicing, small deletions, small insertions, gross deletions, and gross insertions have been identified in patients with WAS. In addition, WASP‑interacting proteins are suspected in patients with clinical features of WAS, in whom the WASP gene sequence and mRNA levels are normal...
August 31, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28900928/cardiovascular-and-hemostatic-disorders-soce-and-ca-2-handling-in-platelet-dysfunction
#13
Jose J Lopez, Gines M Salido, Juan A Rosado
Among the Ca(2+) entry mechanisms in platelets, store-operated Ca(2+) entry (SOCE) plays a prominent role as it is necessary to achieve full activation of platelet functions and replenish intracellular Ca(2+) stores. In platelets, as in other non-excitable cells, SOCE has been reported to involve the activation of plasma membrane channels by the ER Ca(2+) sensor STIM1. Despite electrophysiological studies are not possible in human platelets, indirect analyses have revealed that the Ca(2+)-permeable channels involve Orai1 and, most likely, TRPC1 subunits...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28895772/flow-cytometry-based-platelet-function-testing-is-predictive-of-symptom-burden-in-a-cohort-of-bleeders
#14
Niklas Boknäs, Sofia Ramström, Lars Faxälv, Tomas L Lindahl
Platelet function disorders (PFDs) are common in patients with mild bleeding disorders (MBDs), yet the significance of laboratory findings suggestive of a PFD remain unclear due to the lack of evidence for a clinical correlation between the test results and the patient phenotype. Herein, we present the results from a study evaluating the potential utility of platelet function testing using whole-blood flow cytometry in a cohort of 105 patients undergoing investigation for MBD. Subjects were evaluated with a test panel comprising two different activation markers (fibrinogen binding and P-selectin exposure) and four physiologically relevant platelet agonists (ADP, PAR1-AP, PAR4-AP, and CRP-XL)...
September 12, 2017: Platelets
https://www.readbyqxmd.com/read/28895444/d-dimer-elevation-as-a-blood-biomarker-for-detection-of-structural-disorder-in-mild-traumatic-brain-injury
#15
Kazutaka Sugimoto, Eiichi Suehiro, Mizuya Shinoyama, Hirokazu Sadahiro, Kouhei Haji, Yuichi Fujiyama, Reo Kawano, Mitsuaki Nishioka, Michiyasu Suzuki
Computed tomography (CT) scans are useful in patients with traumatic brain injury (TBI), but the potential risks associated with ionizing radiation are unknown. Furthermore, CT scans are not commonly available in developing countries. In this study, coagulopathy and abnormal fibrinolysis were investigated as blood biomarkers for detection of structural disorder in mild TBI. A total of 88 patients with mild and isolated TBI (Glasgow Coma Scale (GCS) score 14-15) were admitted to Kenwakai Ootemachi Hospital between October 2014 and March 2016...
September 12, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/28892906/changes-in-haematological-parameters-in-newborns-born-to-preeclamptic-mothers-a-case-control-study-in-a-rural-hospital
#16
Kalavakuru Mouna, Shilpa Manigatta Doddagowda, Krishnappa Junjegowda, Latha Krishnamurthy
INTRODUCTION: Pregnancy is a physiological phenomenon. However, some women develop problems during pregnancy period, which puts both the mother's and the foetus health at risk. Hypertensive disorders of pregnancy are the type of the maternal diseases that can cause the most detrimental effects to the mother and foetus. AIMS: To determine the haematological parameters in neonates born to preeclamptic mothers. MATERIALS AND METHODS: It was a prospective case control study carried out on neonates born to preeclamptic mothers in our institute from March 2016 to November 2016...
July 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28888361/increased-platelet-glycogen-sysnthase-kinase-3beta-in-first-episode-psychosis
#17
Helena P G Joaquim, Marcus V Zanetti, Mauricio H Serpa, Martinus T Van de Bilt, Paulo C Sallet, Tiffany M Chaim, Geraldo F Busatto, Wagner F Gattaz, Leda L Talib
Past studies have linked intracellular pathways related to psychotic disorders to the GSK3B enzyme. This study aimed to investigate GSK3B protein expression and phosphorylation in drug-naïve first-episode psychosis patients (n=43) at baseline and following symptom remission, and in healthy controls (n=77). At baseline GSK3B total level was higher in patients (p<0.001). In schizophrenia spectrum patients (n=25) GSK3B total and phosphorylated levels were higher than in controls and patients with other non-affective psychotic disorders (n=18) (p<0...
September 6, 2017: Schizophrenia Research
https://www.readbyqxmd.com/read/28888044/novel-mutations-in-thai-patients-with-glanzmann-thrombasthenia
#18
Rungnapa Ittiwut, Pintip Suchartlikitwong, Yaowaree Kittikalayawong, Chupong Ittiwut, Karan Prasopsanti, Darintr Sosothikul, Vorasuk Shotelersuk, Kanya Suphapeetiporn
OBJECTIVES: Glanzmann thrombasthenia (GT) is an autosomal recessive platelet disorder, caused by defects of the platelet integrin αIIbβ3 (GPIIb/IIIa) resulting from pathogenic mutations in either ITGA2B or ITGB3. It is characterized by spontaneous mucocutaneous bleeding. The molecular features of GT in Thailand have not been identified. This study aimed to determine the clinical and molecular features of unrelated Thai patients with GT. METHODS: Four patients with clinically suspected GT were recruited at the Division of Pediatric Hematology/Oncology, King Chulalongkorn Memorial Hospital...
September 9, 2017: European Journal of Haematology
https://www.readbyqxmd.com/read/28887433/the-neurobeachin-like-2-protein-regulates-mast-cell-homeostasis
#19
Sebastian Drube, Randy Grimlowski, Carsten Deppermann, Julia Fröbel, Florian Kraft, Nico Andreas, David Stegner, Jan Dudeck, Franziska Weber, Mandy Rödiger, Christiane Göpfert, Julia Drube, Daniela Reich, Bernhard Nieswandt, Anne Dudeck, Thomas Kamradt
The neurobeachin-like 2 protein (Nbeal2) belongs to the family of beige and Chediak-Higashi (BEACH) domain proteins. Loss-of-function mutations in the human NBEAL2 gene or Nbeal2 deficiency in mice cause gray platelet syndrome, a bleeding disorder characterized by macrothrombocytopenia, splenomegaly, and paucity of α-granules in megakaryocytes and platelets. We found that in mast cells, Nbeal2 regulates the activation of the Shp1-STAT5 signaling axis and the composition of the c-Kit/STAT signalosome. Furthermore, Nbeal2 mediates granule formation and restricts the expression of the transcription factors, IRF8, GATA2, and MITF as well as of the cell-cycle inhibitor p27, which are essential for mast cell differentiation, proliferation, and cytokine production...
September 8, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28886489/increased-plasma-scxcl16-levels-may-have-a-relationship-with-th1-th2-imbalance-in-primary-immune-thrombocytopenia
#20
Yating Hao, Yang Li, Huiyuan Li, Mingen Lyu, Donglei Zhang, Rongfeng Fu, Yue Guan, Shixuan Wang, Boyang Sun, Xueqing Dou, Lei Zhang, Renchi Yang
Primary immune thrombocytopenia (ITP) is a disease of autoimmunity in which there are Th1/Th2 imbalance and disordered cytokine profiles. CXC chemokine ligand 16 (CXCL16) was proved to implicate in some autoimmune diseases. Our research aimed to determine plasma soluble CXCL16 (sCXCL16) levels and its effects in ITP. We used ELISA to measure plasma sCXCL16, IFN-γ and IL-4 and flow cytometry to determine expression of CXCR6 on lymphocyte subsets. We used real-time PCR to detect the CXCL16 and CXCR6 mRNA expression...
September 5, 2017: Cytokine
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