0000000000171114

AUTHOR

Miri Blank

showing 4 related works from this author

Antiphosphatidylserine Antibodies Affect Rat Yolk Sacs in Culture: a Mechanism for Fetal Loss in Antiphospholipid Syndrome

2004

PROBLEM: A variety of reproductive impairments have been reported in the context of the antiphospholipid syndrome (APS). APS is associated with the presence of antibodies to negatively charged phospholipids that may affect the outcome of pregnancy. METHOD OF STUDY: Rat embryos were cultured within their yolk sacs. The effects of two antiphosphatidylserine monoclonal aPS antibodies (HL5B, RR7F) regarding their influence on growth and apoptotic events of the yolk sacs, as well as on growth and the morphology of the embryos, were studied. RESULTS: Exposure of rat embryos and their yolk sacs to aPS inhibited yolk sac growth. Moreover, increased number of apoptotic events of giant cells in the a…

medicine.medical_specialtyfood.ingredientbiologyImmunologyObstetrics and GynecologyContext (language use)Embryomedicine.diseasefoodEndocrinologymedicine.anatomical_structureReproductive MedicineApoptosisGiant cellAntiphospholipid syndromeInternal medicineYolkembryonic structuresmedicinebiology.proteinImmunology and AllergyAntibodyYolk sacAmerican Journal of Reproductive Immunology
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Interaction of inflammation, thrombosis, aspirin and enoxaparin in CNS experimental antiphospholipid syndrome

2008

Experimental antiphospholipid syndrome (eAPS) induced by immunization with beta(2)-glycoprotein I (beta(2)-GPI) causes behavioral hyperactivity. We assessed the role of thrombotic and inflammatory perivascular factors and standard APS therapies for CNS manifestations. Groups of mice (n=10 per group) were immunized once with beta(2)-GPI (eAPS) or adjuvant (controls) and treated daily from 1 month after immunization with either sham injections, aspirin (1.2 mg/kg) or enoxaparin (1 mg/kg) for 3 months. Serum antiphospholipid antibodies (aPL) and brain levels of tissue necrosis factor-alpha (TNF-alpha) and prostaglandin E (PGE) were then measured by ELISA and thrombin inhibitors by immunoblot. …

Central Nervous Systemmedicine.medical_treatmentEnzyme-Linked Immunosorbent AssayInflammationPharmacologylcsh:RC321-571AnticoagulationMiceFibrinolytic AgentsAntiphospholipid syndromeAnimalsMedicineBeta 2-Glycoprotein IAlprostadilEnoxaparinlcsh:Neurosciences. Biological psychiatry. NeuropsychiatryPhospholipidsInflammationBehaviorAnalysis of VarianceMice Inbred BALB CAspirinAspirinBehavior AnimalTumor Necrosis Factor-alphabusiness.industryThrombosisAntiphospholipid Syndromemedicine.diseaseThrombosisAnimal modelsDisease Models AnimalNeurologybeta 2-Glycoprotein IImmunologyExploratory BehaviorFemaleTumor necrosis factor alphamedicine.symptombusinessDiscovery and development of direct thrombin inhibitorsProstaglandin Emedicine.drugNeurobiology of Disease
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Human antiphospholipid antibodies induce TNFα in monocytes via Toll-like receptor 8

2009

The antiphospholipid syndrome (APS) is characterized by recurrent arterial and/or venous thromboses, pregnancy loss and the presence of antiphospholipid antibodies (aPL). One of the discussed mechanisms of this thrombotic activity in APS patients is attributed to TNFalpha secretion in monocytes after aPL stimulation. To investigate this mechanism in detail, we employed a monoclonal aPL and IgG fractions of APS patients for stimulation of human peripheral monocytes. Stimulation with this monoclonal aPL resulted in an increased expression and secretion of TNFalpha, caused by specific upregulation of TLR8 mRNA and protein expression levels. To confirm the specificity of this finding we could d…

medicine.medical_specialtymedicine.drug_classBlotting WesternImmunologyEnzyme-Linked Immunosorbent AssayStimulationCell SeparationBiologyMonoclonal antibodyPeripheral blood mononuclear cellMonocytesProinflammatory cytokineDownregulation and upregulationimmune system diseasesAntiphospholipid syndromeInternal medicinemedicineHumansImmunology and AllergyReverse Transcriptase Polymerase Chain ReactionTumor Necrosis Factor-alphaAntibodies MonoclonalHematologyAntiphospholipid SyndromeFlow Cytometrymedicine.diseaseEndocrinologyToll-Like Receptor 8MonoclonalImmunologyAntibodies AntiphospholipidElectrophoresis Polyacrylamide GelTumor necrosis factor alphaImmunobiology
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Identification of a peptide mimicking the binding pattern of an antiphospholipid antibody

2006

Our objective was to characterize monoclonal antiphospholipid antibodies (APL) and identify disease-associated antigens in patients with the antiphospholipid syndrome (APS). We used the monoclonal antibody HL-5B, derived from a patient with APS suffering from multiple ischemic events, to screen a 12-mer peptide phage display library (New England Biolabs, London, England). The identified phage clones were sequenced and the derived consensus peptide was synthesized. The peptide was used to perform competitive inhibition experiments for their ability to inhibit the binding of the monoclonal antibody and of serum antibodies to cardiolipin and phosphatidylserine. Additionally patients and contro…

AdultMalePhage displaymedicine.drug_classMolecular Sequence DataImmunologyEnzyme-Linked Immunosorbent AssayMonoclonal antibodyEpitopeAntigenAntibody SpecificityPeptide LibraryAntiphospholipid syndromemedicineHumansImmunology and AllergyAmino Acid SequencePeptide libraryPeptide sequenceAgedbiologyMolecular MimicryAntibodies MonoclonalHematologyMiddle AgedAntiphospholipid Syndromemedicine.diseaseVirologyMolecular biologyAntibodies Antiphospholipidbiology.proteinFemaleAntibodyPeptidesProtein BindingImmunobiology
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