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Immune thrombocytopenia

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https://www.readbyqxmd.com/read/28096086/platelets-activate-a-pathogenic-response-to-blood-stage-plasmodium-infection-but-not-a-protective-immune-response
#1
Irene Gramaglia, Joyce Velez, Valery Combes, Georges E R Grau, Melanie Wree, Henri C van der Heyde
Clinical studies indicate that thrombocytopenia correlates with the development of severe falciparum malaria, suggesting that platelets either contribute to control of parasite replication possibly as innate parasite killer cells or function in eliciting pathogenesis. Removal of platelets by anti-CD41 mAb treatment, platelet inhibition by aspirin, and adoptive transfer of WT platelets to CD40-KO mice, which do not control parasite replication, resulted in similar parasitemia compared with control mice. Human platelets at a physiological ratio of 1 platelet to 9 RBCs did not inhibit the in vitro development or replication of blood-stage P...
January 17, 2017: Blood
https://www.readbyqxmd.com/read/28092405/thrombin-contributes-to-protective-immunity-in-pneumonia-derived-sepsis-via-fibrin-polymerization-and-platelet-neutrophil-interactions
#2
Theodora A M Claushuis, Sacha F de Stoppelaar, Ingrid Stroo, Joris J T H Roelofs, Roelof Ottenhoff, Tom van der Poll, Cornelis van 't Veer
BACKGROUND: Innate immunity and coagulation are closely linked during sepsis. Their interaction can be detrimental for outcome due to microvascular failure but can also enhance host defense. The role of thrombin herein has not been fully elucidated. OBJECTIVE: We aimed to investigate the contribution of thrombin to the host response during pneumonia derived sepsis. METHODS: Mice treated with the specific thrombin inhibitor Dabigatran or control chow were infected with the common human sepsis pathogen Klebsiella (K...
January 16, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28090498/successful-treatment-of-steroid-refractory-immune-thrombocytopenia-with-alemtuzumab
#3
Chul Won Jung, Su-Hee Cho, Sylvia Park, Jun Ho Jang, Jun Ho Ji
No abstract text is available yet for this article.
December 2016: Blood Research
https://www.readbyqxmd.com/read/28090489/effect-of-short-term-high-dose-methylprednisolone-on-oxidative-stress-in-children-with-acute-immune-thrombocytopenia
#4
Musa Cura, Ahmet Koç, Nurten Aksoy, Zeynep Canan Özdemir
BACKGROUND: Immune thrombocytopenia (ITP) is the most common cause of acquired childhood thrombocytopenia and is characterized by increased immune-mediated destruction of circulating thrombocytes. Oxidative damage may be involved in ITP pathogenesis; paraoxonase (PON) and arylesterase (ARE) enzymes are closely associated with the cellular antioxidant system. We investigated the effect of short-term high-dose methylprednisolone (HDMP) treatment on the total oxidant status (TOS), total antioxidant capacity (TAC), oxidative stress index (OSI), and PON and ARE enzymatic activity in children with acute ITP...
December 2016: Blood Research
https://www.readbyqxmd.com/read/28090042/autoimmune-hepatitis-associated-with-immune-thrombocytopenic-purpura
#5
Akihiro Ito, Kaname Yoshizawa, Kazuya Fujimori, Susumu Morita, Takashi Shigeno, Toshitaka Maejima
Although autoimmune hepatitis (AIH) is frequently complicated with chronic thyroiditis or other autoimmune disorders, reports on its association with immune thrombocytopenic purpura (ITP) are scarce. We herein describe a case of AIH associated with ITP. A 75-year-old Japanese woman was admitted to our hospital due to increased aminotransferase levels and severe thrombocytopenia. Elevated serum immunoglobulin G (IgG) was detected, and tests for platelet-associated IgG and anti-nuclear antibody were positive...
2017: Internal Medicine
https://www.readbyqxmd.com/read/28078756/infections-in-non-splenectomized-persistent-or-chronic-primary-immune-thrombocytopenia-adults-risk-factors-and-vaccination-effect
#6
Guillaume Moulis, Maryse Lapeyre-Mestre, Aurore Palmaro, Laurent Sailler
INTRODUCTION: Risk factors for infection and protective effect of vaccines in immune thrombocytopenia (ITP) patients in the era of rituximab therapy are unknown. OBJECTIVES: To assess the risk factors for serious and non-serious infections (respectively, SIs and NSIs) in non-splenectomized adults treated for persistent or chronic primary ITP, including the effect of pneumococcal and influenza vaccines. PATIENTS/METHODS: The population was the 2009-2012 FAITH cohort (n=1805), which is the cohort of all incident (newly diagnosed) primary ITP adults treated >3months in France built in the national health insurance database (SNIIRAM)...
January 12, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28073042/rapid-infusions-of-human-normal-immunoglobulin-50g-l-are-safe-and-well-tolerated-in-immunodeficiencies-and-immune-thrombocytopenia
#7
Giuseppe Spadaro, Alessandra Vultaggio, A Alberto Bosi, Dietmar Reichert, Jan Janssen, Donatella Lamacchia, Liliana Nappi, Antonio Pecoraro, Cinzia Milito, Andrea Ferraro, Andrea Matucci, Francesca Bacchiarri, Valentina Carrai, Azra Hibbeler, Elisabet Speckman, Chiara Guarnieri, Serena Bongiovanni, Isabella Quinti
Intravenous immunoglobulin (IVIg) is accepted as an effective and well-tolerated treatment for primary and secondary immunodeficiencies (ID) and immune thrombocytopenia (ITP). Adverse reactions of IVIg are usually mild, comprising transient flu-like symptoms, change in blood pressure and tachycardia. However IVIg therapy can be burdensome for both patients and healthcare facilities, since the infusion may take up to 4h to administer. The objective of our multicentre, prospective, open-label phase III trial was to evaluate the tolerability and safety of human normal immunoglobulin 50g/l (Ig VENA) at high intravenous infusion rates in adult patients with ID and ITP who had previously tolerated IVIg treatment, by progressively increasing infusion rate up to 8ml/kg/hr...
January 7, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/28072956/-clinical-and-immunological-analysis-of-the-patient-with-autoimmunity-due-to-germline-stat3-gain-of-function-mutation
#8
Y Ding, Y Zhang, Y P Wang, H Y Zhao, X M Chen, X H Xue, X M Bai, Y F An, Z Y Zhang, X M Tang, X D Zhao
Objective: To investigate the clinical and immunological laboratory features and gene mutation in a female patient who carried a germline gain-of-function mutation in STAT3. Method: A patient with lymphadenopathy and pancytopenia, visited the Department of Rheumatology and Immunology of Children's Hospital of Chongqing Medical University in May 2016. The clinical and laboratory characteristics, results of immunophenotyping and exome sequencing were analyzed retrospectively and related literature was reviewed...
January 2, 2017: Zhonghua Er Ke za Zhi. Chinese Journal of Pediatrics
https://www.readbyqxmd.com/read/28069071/sporadic-cases-of-adult-measles-a-research-article
#9
Ranjan Premaratna, Nathasha Luke, Harsha Perera, Mahesh Gunathilake, Pubudu Amarasena, T G A Nilmini Chandrasena
BACKGROUND: Measles caused by a paramyxovirus, characterized by fever, malaise, cough, coryza conjunctivitis, a maculopapular rash is known to result in pneumonia, encephalitis and death. Fatal cases of measles in Sri Lanka are rare after implementation of the National Immunization Programme in 1984. Thereafter 0.1% case fatality rate was observed during October 1999-June 2000 which is a very low figure compared to other regional countries. Immunization guidelines were further revised in 2001, 2011 and in 2012 when additional immunization was recommended to age group 4-21 years; who are likely to have inadequate immunization, in order to achieve elimination of Measles by 2020...
January 10, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28064294/primary-versus-secondary-immune-thrombocytopenia-in-adults-a-comparative-analysis-of-clinical-and-laboratory-attributes-in-newly-diagnosed-patients-in-southern-pakistan
#10
S Sultan, S J Ahmed, S Murad, S M Irfan
BACKGROUND: Immune thrombocytopenic purpura (ITP) is a hemorrhagic diathesis, characterized by platelets destruction alongside impaired production. Patients from Asian regions often exhibit distinctive characteristics in comparison to the western patients. We accomplished this study to evaluate the prevalence of primary versus secondary ITP along with the comparative analysis between them. The secondary objective was to determine the etiological spectrum of secondary ITP. METHODS: We illustrate the results of a large cohort of newly diagnosed adults ITP from southern Pakistan...
October 2016: Medical Journal of Malaysia
https://www.readbyqxmd.com/read/28060120/type-2b-von-willebrand-disease-an-unusual-cause-of-severe-neonatal-thrombocytopenia
#11
Seth J Rotz, Joseph S Palumbo, Russell E Ware
An infant with presumed maternal immune thrombocytopenic purpura had persistent thrombocytopenia with platelet clumping. The patient had no significant bleeding symptoms in the first year of life and von Willebrand antigen and ristocetin cofactor activity were normal. Absent high molecular weight multimers ultimately led to a genetically proven diagnosis of type 2B von Willebrand disease (3964G>A VWF exon 28), highlighting the challenges of establishing this diagnosis in infants.
January 5, 2017: Journal of Pediatric Hematology/oncology
https://www.readbyqxmd.com/read/28056326/-a-case-report-of-combined-treatment-with-rituximab-and-eltrombopag-in-refractory-immune-thrombocytopenia
#12
(no author information available yet)
No abstract text is available yet for this article.
January 1, 2017: Zhonghua Nei Ke za Zhi [Chinese Journal of Internal Medicine]
https://www.readbyqxmd.com/read/28054583/common-variable-immunodeficiency-patients-with-a-phenotypic-profile-of-immunosenescence-present-with-thrombocytopenia
#13
Jan Stuchlý, Veronika Kanderová, Marcela Vlková, Ivana Heřmanová, Lucie Slámová, Ondřej Pelák, Eli Taraldsrud, Dalibor Jílek, Pavlína Králíc Ková, Børre Fevang, Marie Trková, Ondřej Hrušák, Eva Froňková, Anna Šedivá, Jiří Litzman, Tomáš Kalina
Common variable immunodeficiency (CVID) is a heterogeneous group of diseases. Our aim was to define sub-groups of CVID patients with similar phenotypes and clinical characteristics. Using eight-color flow cytometry, we analyzed both B- and T-cell phenotypes in a cohort of 88 CVID patients and 48 healthy donors. A hierarchical clustering of probability binning "bins" yielded a separate cluster of 22 CVID patients with an abnormal phenotype. We showed coordinated proportional changes in naïve CD4+ T-cells (decreased), intermediate CD27- CD28+ CD4+ T-cells (increased) and CD21low B-cells (increased) that were stable for over three years...
January 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28052942/refractory-primary-immune-thrombocytopenia-with-subsequent-del-5q-mds-complete-remission-of-both-after-lenalidomide
#14
Thomas Bech Mortensen, Henrik Frederiksen, Claus Werenberg Marcher, Birgitte Preiss
A patient with refractory primary immune thrombocytopenia (ITP) characterised by severe skin and mucosal bleedings was treated with several ITP-directed therapies including cyclophosphamide. He later developed therapy-related del(5q) myelodysplastic syndrome with no dysplastic morphological features in bone marrow. He remained severely thrombocytopenic, which suggests ongoing immune mediated platelet destruction. After two 3 week cycles of low-dose lenalidomide, complete cytogenetic remission and complete normalisation of platelet count were observed...
January 4, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28043314/hepatitis-b-leading-to-megaloblastic-anemia-and-catastrophic-peripheral-thrombocytopenia
#15
Muhammad Hafeez, Tariq Sarfraz, Raja Ghayas Khan, Abdul Rafe, Ghulam Rasool, Kamran Nazir Ahmed
Hepatitis B virus (HBV) typically causes chronic hepatitis, cirrhosis, and hepatocellular carcinoma. It is associated with a variety of extrahepatic complications. We herein, present a rare extrahepatic complication of HBV infection. A 32-year man presented with melena, bleeding from gums and fever. Peripheral blood examination revealed anemia, macrocytosis and severe thrombocytopenia. His hepatitis B surface antigen (HBsAg) was positive but deoxyribonucleic acid (HBV DNA) by polymerase chain reaction (PCR) was negative...
December 2016: Journal of the College of Physicians and Surgeons—Pakistan: JCPSP
https://www.readbyqxmd.com/read/28038671/erratum-to-treatment-of-5-dogs-with-immune-mediated-thrombocytopenia-using-romiplostim
#16
Barbara Kohn, Gürkan Bal, Aleksandra Chirek, Sina Rehbein, Abdulgabar Salama
No abstract text is available yet for this article.
December 30, 2016: BMC Veterinary Research
https://www.readbyqxmd.com/read/28035550/bleeding-after-endoscopic-procedures-in-patients-with-chronic-hematologic-thrombocytopenia
#17
Hyun Jin Oh, Jae Myung Park, Seung Bae Yoon, Han Hee Lee, Chul-Hyun Lim, Jin Su Kim, Yu Kyung Cho, Bo-In Lee, Young-Seok Cho, Myung-Gyu Choi
BACKGROUND: Procedure-induced bleeding is a major complication after endoscopic intervention. AIMS: The aim of this study was to investigate the risk of endoscopy-related bleeding in patients with chronic hematologic thrombocytopenia. METHODS: We investigated endoscopy-related bleeding in 175 procedures performed on 108 patients with immune thrombocytopenic purpura or aplastic anemia. The outcomes were compared with those of 350 procedures on age-, sex-, and procedure-matched control subjects...
December 29, 2016: Digestive Diseases and Sciences
https://www.readbyqxmd.com/read/28034871/how-i-evaluate-and-treat-thrombocytopenia-in-the-intensive-care-unit-patient
#18
REVIEW
Andreas Greinacher, Sixten Selleng
Multiple causes (pseudothrombocytopenia, hemodilution, increased consumption, decreased production, increased sequestration, and immune-mediated destruction of platelets) alone or in combination make thrombocytopenia very common in intensive care unit (ICU) patients. Persisting thrombocytopenia in critically ill patients is associated with, but not causative of, increased mortality. Identification of the underlying cause is key for management decisions in individual patients. While platelet transfusion might be indicated in patients with impaired platelet production or increased platelet destruction, it could be deleterious in patients with increased intravascular platelet activation...
December 29, 2016: Blood
https://www.readbyqxmd.com/read/28034281/is-there-any-role-for-splenectomy-in-adulthood-onset-chronic-immune-thrombocytopenia-in-the-era-of-tpo-receptors-agonists-a-critical-overview
#19
Vibor Milunovic, Inga Mandac Rogulj, Slobodanka Kolonic Ostojic
Immune thrombocytopenia (ITP) in adulthood is characterized by chronic relapsing course. Despite the efficacious first line treatment (corticosteroid, intravenous immunoglobulin), majority of patients will enter the chronic phase warranting another treatment approach. Until recently, splenectomy performed in ITP chronic phase represented the standard of care with long-term remissions in more than 70% of patients, but however has never been tested in clinical trials. However, with the advances of our understanding of ITP pathophysiology and the shifting focus on megakaryocyte impairment, novel drugs were introduced in treatment paradigm, mainly trombopoietin receptor agonists (TPO-RAs); romiplostim and eltrombopag...
December 29, 2016: Cardiovascular & Hematological Disorders Drug Targets
https://www.readbyqxmd.com/read/28028748/mouse-immune-thrombocytopenia-is-associated-with-th1-bias-and-expression-of-activating-fc%C3%AE-receptors
#20
Tetsuya Nishimoto, Yuka Okazaki, Miku Numajiri, Masataka Kuwana
Immune thrombocytopenia (ITP) is an autoimmune disease mediated by anti-platelet autoantibodies. We recently established a mouse ITP model exhibiting regulatory T-cell (Treg) deficiency, although only one-third of the Treg-deficient mice developed ITP. To clarify mechanisms involved in the emergence of platelet-specific autoimmunity in this model, we examined the T helper (Th)-cell balance and macrophage Fcγ receptor (FcγR) expression profiles in Treg-deficient mice with and without ITP. Splenocytes from both populations of Treg-deficient mice and control BALB/c mice were subjected to flow cytometry-based analyses to evaluate Th cell subset proportions and the expression of activating and inhibitory FcγRs on macrophages...
December 27, 2016: International Journal of Hematology
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