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Anti-phospholipid syndrome

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https://www.readbyqxmd.com/read/29126301/coagulation-testing-in-the-core-laboratory
#1
William E Winter, Sherri D Flax, Neil S Harris
Primary hemostasis begins with endothelial injury. VWF, produced by endothelial cells, binds to platelets and links them to subendothelial collagen. Platelet-derived ADP and thromboxane activate non-adhered platelets via their GPIIb/IIIa receptors, allowing these platelets to participate in platelet aggregation. Secondary hemostasis is initiated with the binding of factor VII to extravascular tissue factor (TF). Factors II, VII, IX and X are vitamin K-dependent factors. The role of vitamin K is to assist in the addition of gamma carboxylate groups to glutamic acids in the "GLA" domains of these factors...
November 8, 2017: Laboratory Medicine
https://www.readbyqxmd.com/read/29067844/clinical-feature-and-anti-phospholipid-antibody-profiles-of-pregnancy-failure-in-young-women-with-antiphospholipid-antibody-syndrome-treated-with-conventional-therapy
#2
Kayoko Kaneko, Shuko Mishima, Mikako Goto, Mari Mitsui, Shinji Tanigaki, Kenji Oku, Nobuaki Ozawa, Eisuke Inoue, Tatsuya Atsumi, Haruhiko Sago, Atsuko Murashima
OBJECTIVE: To elucidate clinical feature and anti-phospholipid antibody (aPL) profiles, including lupus anticoagulant (LA), anti-cardiolipin (CL) antibodies and anti-phosphatidylserine/prothrombin (PS/PT) antibodies, of pregnancy failure in patients with antiphospholipid antibody syndrome (APS) already treated with conventional therapy. MATERIALS AND METHODS: Thirty-four women with a history of pregnancy who were diagnosed with APS between 2008 and 2016 were included in the study...
October 25, 2017: Modern Rheumatology
https://www.readbyqxmd.com/read/28960143/antigenicity-analysis-of-human-parvovirus-b19-vp1u-protein-in-the-induction-of-anti-phospholipid-syndrome
#3
Chun-Yu Lin, Chun-Ching Chiu, Ju Cheng, Chia-Yun Lin, Ya-Fang Shi, Chun-Chou Tsai, Bor-Show Tzang, Tsai-Ching Hsu
Mounting evidence suggests a connection between human parvovirus B19 (B19) and autoimmune diseases, and especially an association between the B19-VP1 unique region (VP1u) and antiphospholipid syndrome (APS). However, little is known about the antigenicity of B19-VP1u in the induction of APS-like syndrome. To elucidate the antigenicity of B19-VP1u in the induction of APS, N-terminal truncated B19-VP1u (tVP1u) proteins were prepared to immunize Balb/c mice to generate antibodies against B19-tVP1u proteins. The secreted phospholipase A2 (sPLA2) activities and binding specificity of mice anti-B19-tVP1u antibodies with cardiolipin (CL) and beta-2-glycoprotein I (β2GPI) were evaluated by performing immunoblot, ELISA and absorption experiments...
September 29, 2017: Virulence
https://www.readbyqxmd.com/read/28837832/factors-associated-with-adverse-pregnancy-outcomes-in-women-with-antiphospholipid-syndrome-a-multicenter-study
#4
Masashi Deguchi, Hideto Yamada, Mayumi Sugiura-Ogasawara, Mamoru Morikawa, Daisuke Fujita, Akinori Miki, Shintaro Makino, Atsuko Murashima
The aim of this study was to understand the clinical features of antiphospholipid syndrome (APS)-complicated pregnancies and evaluate risk factors for the adverse pregnancy outcomes. This multicenter study evaluated live-birth rates according to therapy modality for APS and risk factors of pregnancy loss in 81 pregnancies. Risk factors for pregnancy complications, including premature delivery before 34 gestational weeks, hypertensive disorders of pregnancy, thrombocytopenia, and light-for-date neonate, were evaluated in 51 women who received low dose aspirin (LDA) plus unfractionated heparin (UFH) and delivered after 24 GW...
August 2017: Journal of Reproductive Immunology
https://www.readbyqxmd.com/read/28803708/anti-phospholipid-syndrome-current-opinion-on-mechanisms-involved-laboratory-characterization-and-diagnostic-aspects
#5
REVIEW
Jean Amiral, Marie Peyrafitte, Claire Dunois, Anne Marie Vissac, Jerard Seghatchian
Anti-phospholipid syndrome is a complex and severe clinical situation, associated with symptoms such as recurrent thrombosis, arterial or venous, at any site, pregnancy loss, and other related syndromes. These clinical burdens, are highly variable from patient to patient, and are associated with biological abnormalities, such as the presence of the Lupus Anticoagulant or phospholipid dependent antibodies, confirmed on two occasions at least 12 weeks apart. From the diagnosis standpoint, both, functional (clotting) or immunological assays, are difficult to standardize and to optimize, due to the absence of reference material, or a characteristic clinical group, and international reference preparations...
July 15, 2017: Transfusion and Apheresis Science
https://www.readbyqxmd.com/read/28789672/challenges-in-the-diagnosis-and-management-of-anti-phospholipid-syndrome-a-case-from-cameroon
#6
Ahmadou M Jingi, Liliane Mfeukeu-Kuate, Aurel T Tankeu, Narcisse Assene Ateba, Edvine Wawo Yonta, Jean Jacques Noubiap
BACKGROUND: Anti-phospholipid syndrome (APLS) is a condition characterized by the presence of raised plasma levels of anti-phospholipid antibodies associated with thrombo-embolic disease and/or poor obstetrical outcomes in women. The epidemiology of APLS is unknown in most sub-Saharan African countries due to limited access to diagnosis tools. We report the case of APLS in a 29-year-old obese woman that was preceded by pre-eclampsia and fetal death. The diagnosis of APLS was made during a thrombo-embolic episode 4 years after the poor obstetrical outcome...
August 8, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28748111/dimerized-domain-v-of-beta2-glycoprotein-i-is-sufficient-to-upregulate-procoagulant-activity-in-pma-treated-u937-monocytes-and-require-intact-residues-in-two-phospholipid-binding-loops
#7
Alexey Kolyada, David A Barrios, Natalia Beglova
Upregulation of the procoagulant activity of monocytes by antibodies to beta2- glycoprotein I (β2GPI) is one of the mechanisms contributing to thrombosis in antiphospholipid syndrome. Current knowledge about receptors responsible for the upregulation of procoagulant activity by β2GPI/anti-β2GPI complexes and their binding sites on β2GPI is far from complete. We quantified the procoagulant activity expressed by phorbol 12-myristate 13-acetate (PMA)- differentiated U937 cells by measuring clotting kinetics in human plasma exposed to stimulated cells...
June 2017: Antibodies
https://www.readbyqxmd.com/read/28741233/how-to-identify-high-risk-aps-patients-clinical-utility-and-predictive-values-of-validated-scores
#8
REVIEW
Kenji Oku, Olga Amengual, Shinsuke Yasuda, Tatsuya Atsumi
PURPOSE OF REVIEW: Antiphospholipid syndrome (APS) is a clinical disorder characterised by thrombosis and/or pregnancy morbidity in the persistence of antiphospholipid (aPL) antibodies that are pathogenic and have pro-coagulant activities. Thrombosis in APS tends to recur and require prophylaxis; however, the stereotypical treatment for APS patients is inadequate and stratification of the thrombotic risks is important as aPL are prevalently observed in various diseases or elderly population...
August 2017: Current Rheumatology Reports
https://www.readbyqxmd.com/read/28711993/clinical-risk-assessment-in-the-antiphospholipid-syndrome-current-landscape-and-emerging-biomarkers
#9
REVIEW
Shruti Chaturvedi, Keith R McCrae
PURPOSE OF REVIEW: Laboratory criteria for the classification of antiphospholipid syndrome include the detection of a lupus anticoagulant and/or anticardiolipin and anti-β2-glycoprotein I antibodies. However, the majority of patients who test positive in these assays do not have thrombosis. Current risk-stratification tools are largely limited to the antiphospholipid antibody profile and traditional thrombotic risk factors. RECENT FINDINGS: Novel biomarkers that correlate with disease activity and potentially provide insight into future clinical events include domain 1 specific anti-β2GPI antibodies, antibodies to other phospholipids or phospholipid/protein antigens (such as anti-PS/PT), and functional/biological assays such as thrombin generation, complement activation, levels of circulating microparticles, and annexin A5 resistance...
July 2017: Current Rheumatology Reports
https://www.readbyqxmd.com/read/28655939/increased-anti-hsp60-and-anti-hsp70-antibodies-in-women-with-unexplained-recurrent-pregnancy-loss
#10
Miwa Matsuda, Aiko Sasaki, Keiko Shimizu, Yasuhiko Kamada, Soichi Noguchi, Yuji Hiramatsu, Mikiya Nakatsuka
 Vascular dysfunction has been reported in women with recurrent pregnancy loss (RPL). We investigated the severity of vascular dysfunction in non-pregnant women with RPL and its correlation with anti-heat shock protein (HSP) antibodies that are known to induce arteriosclerosis. We measured the serum anti-HSP60 antibodies, anti-HSP70 antibodies, and anti-phospholipid antibodies (APA) in 68 women with RPL and 29 healthy controls. Among the women with RPL, 14 had a diagnosis of antiphospholipid syndrome (APS), and in the remaining 54, the causes for RPL were unexplained...
June 2017: Acta Medica Okayama
https://www.readbyqxmd.com/read/28621046/impact-of-borderline-subclinical-hypothyroidism-on-subsequent-pregnancy-outcome-in-women-with-unexplained-recurrent-pregnancy-loss
#11
Sayaka Uchida, Tetsuo Maruyama, Maki Kagami, Fumie Miki, Hanako Hihara, Satomi Katakura, Yushi Yoshimasa, Hirotaka Masuda, Hiroshi Uchida, Mamoru Tanaka
AIM: Because subclinical hypothyroidism (thyroid-stimulating hormone [TSH] > 4.5 IU/mL) is associated with adverse pregnancy outcome, including early pregnancy loss, TSH is recommended to be titrated to ≤2.5 mIU/L in levothyroxine-treated women before pregnancy. The purpose of this study was to determine whether borderline-subclinical hypothyroidism (borderline-SCH; 2.5 < TSH ≤ 4.5 IU/mL) affects the outcome of subsequent pregnancies in women with unexplained recurrent pregnancy loss (uRPL)...
June 2017: Journal of Obstetrics and Gynaecology Research
https://www.readbyqxmd.com/read/28605561/comment-on-decreased-platelet-size-is-associated-with-platelet-activation-and-anti-phospholipid-syndrome-in-systemic-lupus-erythematosus
#12
Yanxia Chen, Jinlin Liu
No abstract text is available yet for this article.
August 1, 2017: Rheumatology
https://www.readbyqxmd.com/read/28605487/comment-on-decreased-platelet-size-is-associated-with-platelet-activation-and-anti-phospholipid-syndrome-in-systemic-lupus-erythematosus-reply
#13
Christian Lood, Anders A Bengtsson
No abstract text is available yet for this article.
August 1, 2017: Rheumatology
https://www.readbyqxmd.com/read/28516871/diagnosis-of-catastrophic-anti-phospholipid-syndrome-in-a-patient-tested-negative-for-conventional-tests
#14
Fabrizio Conti, Roberta Priori, Cristiano Alessandri, Roberta Misasi, Antonella Capozzi, Monica Pendolino, Simona Truglia, Silvia Frisenda, Maurizio Sorice, Guido Valesini
Catastrophic antiphospholipid syndrome (CAPS) is a severe variant of APS, characterised by clinical evidence of multiple organ involvement developing over a very short period of time, histopathological evidence of multiple small vessel occlusions and laboratory confirmation of the presence of aPL (lupus anticoagulant and/or anticardiolipin antibodies and/or anti-Beta2-glcyoprotein I antibodies). Here we report a case of a 39-year-old woman patient who developed a CAPS which was negative to the conventional aPL but positive for aPL in thin layer chromatography immunostaining and vimentin/cardiolipin antibodies by ELISA test...
July 2017: Clinical and Experimental Rheumatology
https://www.readbyqxmd.com/read/28494269/medical-conditions-associated-with-recurrent-miscarriage-is-bmi-the-tip-of-the-iceberg
#15
Mushi J Matjila, Anne Hoffman, Zephne M van der Spuy
BACKGROUND: In contrast to sporadic miscarriage, recurrent miscarriage (RM) is a rare entity which affects 1% of couples attempting conception. It is distressing for couples and healthcare professionals as the aetiology is unclear with limited treatment options. Apart from anti-phospholipid syndrome (APS), the strength of associations between RM and commonly investigated endocrine, autoimmune, thrombophilic and uterine structural abnormalities remains uncertain and variable. OBJECTIVES: To assess the prevalence of commonly investigated medical conditions associated with RM...
July 2017: European Journal of Obstetrics, Gynecology, and Reproductive Biology
https://www.readbyqxmd.com/read/28470650/the-clinical-relevance-of-noncriteria-antiphospholipid-antibodies
#16
Maria Laura Bertolaccini, Giovanni Sanna
While lupus anticoagulant (LA), anticardiolipin antibodies (aCL), anti-β2 glycoprotein I (anti-β2GPI) antibodies represent the best available and the most widely used tests in the investigation for antiphospholipid syndrome (APS), evidence gathered in recent years indicates that other antiphospholipid antibodies (aPL) specificities may also play a role in the syndrome. Several autoantibodies have been shown to be complexed with phospholipids other than cardiolipin, or to some domains of β2GPI, or else directed to other proteins of the coagulation cascade, and these have also been proposed to be of relevance to APS, and their diagnostic value and clinical utility are the focus of current research...
May 3, 2017: Seminars in Thrombosis and Hemostasis
https://www.readbyqxmd.com/read/28431092/failure-of-rivaroxaban-to-prevent-thrombosis-in-four-patients-with-anti-phospholipid-syndrome
#17
Virginie Dufrost, Jessie Risse, Stéphane Kirchner, Stéphane Zuily, Denis Wahl
No abstract text is available yet for this article.
August 1, 2017: Rheumatology
https://www.readbyqxmd.com/read/28420842/the-development-of-marked-collateral-circulation-due-to-inferior-vena-cava-filter-occlusion-in-a-patient-with-chronic-thromboembolic-pulmonary-hypertension-complicated-with-anti-phospholipid-syndrome
#18
Hajime Kasai, Nobuhiro Tanabe, Ken Koshikawa, Yasutaka Hirasawa, Toshihiko Sugiura, Seiichiro Sakao, Koichiro Tatsumi
A 30-year-old Japanese man was diagnosed with chronic thromboembolic pulmonary hypertension (CTEPH) with lupus anticoagulants (LAs) in 2003. He underwent pulmonary endarterectomy after the placement of an inferior vena cava filter (IVCF) in 2004, and treatment with warfarin was continued. In 2014, IVCF occlusion and marked collateral circulation were noted during an examination for transient dyspnea; however, his warfarin level was within the therapeutic range for 88.9% of the time from 2003 to 2014. We herein report a rare case of CTEPH and LAs with IVCF occlusion; in such cases, intense treatment may be required...
2017: Internal Medicine
https://www.readbyqxmd.com/read/28417627/a-retrospective-study-on-the-association-between-thyroid-autoantibodies-with-%C3%AE-2-glycoprotein-and-cardiolipin-antibodies-in-recurrent-miscarriage
#19
Regina Promberger, Katharina Walch, Rudolf Seemann, Sophie Pils, Johannes Ott
Etiologic factors for recurrent miscarriage (RM) include autoimmune diseases, the most frequently antiphospholipid syndrome and thyroiditis. Some women who suffer from RM might also have an altered immune system. We aimed to evaluate possible associations between anti-thyroid and anti-phospholipid antibodies in women with RM. In a retrospective case series 1 on 156 women with RM, major outcome parameters were antibodies against cardiolipin, β2-glycoprotein I, thyreoperoxidase (TPO-Ab), and thyroglobulin (TG-Ab)...
February 2017: Iranian Journal of Allergy, Asthma, and Immunology
https://www.readbyqxmd.com/read/28414714/excess-atherosclerosis-in-systemic-lupus-erythematosus-a-matter-of-renal-involvement-case-control-study-of-281-sle-patients-and-281-individually-matched-population-controls
#20
Johanna T Gustafsson, Marie Herlitz Lindberg, Iva Gunnarsson, Susanne Pettersson, Kerstin Elvin, John Öhrvik, Anders Larsson, Kerstin Jensen-Urstad, Elisabet Svenungsson
BACKGROUND: Systemic lupus erythematosus (SLE), is a heterogeneous disease which predominantly affects young females (90%). SLE is associated with a shorter life expectancy than in the general population. Standardized mortality ratios (SMR) of 2.4 have been reported, which is comparable to diabetes. In modern societies cardiovascular disease (CVD) is the major cause of premature mortality. Accelerated atherosclerosis is generally assumed to be the underlying cause for SLE related CVD...
2017: PloS One
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