摘要:
Hyper-inflammatory responses can lead to a variety of diseases including sepsis. It is now shown that extracellular histones released in response to inflammatory challenge are mediators contributing to endothelial dysfunction, organ failure and death during sepsis. As such, they can be targeted pharmacologically by inhibitors, as well as used as biomarkers for prognosis of sepsis and other diseases.
摘要:
Hyper-inflammatory responses can lead to a variety of diseases including sepsis. It is now shown that extracellular histones released in response to inflammatory challenge are mediators contributing to endothelial dysfunction, organ failure and death during sepsis. As such, they can be targeted pharmacologically by inhibitors, as well as used as biomarkers for prognosis of sepsis and other diseases.
摘要:
Endothelial protein C receptor (EPCR) is found primarily on endothelial cells of large vessels. EPCR translocates from the plasma membrane surface to the nucleus. Molecules which bind to EPCR can be carried from the plasma membrane surface to the nucleus. These molecules include antibodies to EPCR and activated protein C. Protein C, which also binds to EPCR, can be internalized by endothelial cells, but does not enter the nucleus. Thus, EPCR translocation from the plasma membrane to the nucleus provides a means of delivering nucleic acid such as DNA, proteins such as transcription factors, diagnostic agents or other types of drugs to the nucleus of endothelial cells, particularly those on large blood vessels. Conjugates of the materials to be delivered to the nucleus can be formed by ionic or covalent coupling. For example, proteins, including fusion proteins, can be directly conjugated to an anti-EPCR monoclonal antibody. Covalent attachment of positively charged polymers, such as polylysine, to an anti-EPCR antibody allows nucleic acid to bind by ionic charges. Steptavidin and biotin can also be used to conjugate molecules to anti-EPCR antibodies. These conjugated antibodies are transported to the nucleus by EPCR. Eamples demonstrate selective transport to the nucleus which is mediated by EPCR. Molecules transported include activated protein C, antibodies to EPCR, and steptavidin-biotin conjugates. Modification of anti-EPCR monoclonal antibodies by covalently coupling to polylysine allows binding of an expression vector to the modified antibody and translocation to the nucleus.
摘要:
A Ca2+ dependent recombinant antibody that specifically binds to a specific twelve peptide sequence (E D Q V D P R L I D G K) in the activation region of the Protein C has been constructed. The antibody does not bind to Activated Protein C and can be used to inhibit activation of Protein C by thrombin-thrombomodulin, in purification of Protein C, and in treatment of tumors.
摘要翻译:已经构建了在蛋白C的活化区域中特异性结合特异性十二肽序列(E D Q V D P R L I D G K)的Ca 2+ 2 + u>>重组抗体。 抗体不结合活化蛋白C,可用于通过凝血酶 - 血栓调节蛋白,蛋白C的纯化和肿瘤的治疗来抑制蛋白C的活化。
摘要:
Human protein C and activated protein C were shown to bind to endothelium specifically, selectively and saturably (Kd=30 nM, 7000 sites per cell) in a Ca2+ dependent fashion. Expression cloning revealed a 1.3 kb cDNA that coded for a novel type I transmembrane glycoprotein capable of binding protein C. This protein appears to be a member of the CD1/MHC superfamily. Like thrombomodulin, the receptor involved in protein C activation, the endothelial cell protein C receptor (EPCR) function and message are both down regulated by exposure of endothelium to TNF. Identification of EPCR as a member of the CD1/MHC superfamily provides insights into the role of protein C in regulating the inflammatory response, and determination of methods for pharmaceutical use in manipulating the inflammatory response.
摘要:
Human protein C and activated protein C were shown to bind to endothelium specifically, selectively and saturably (Kd=30 nM, 7000 sites per cell) in a Ca.sup.2+ dependent fashion. Expression cloning revealed a 1.3 kb CDNA that coded for a novel type I transmembrane glycoprotein capable of binding protein C. This protein appears to be a member of the CD1/MHC superfamily. Like thrombomodulin, the receptor involved in protein C activation, the endothelial cell protein C receptor (EPCR) function and message are both down regulated by exposure of endothelium to TNF. Identification of EPCR as a member of the CD1/MHC superfamily provides insights into the role of protein C in regulating the inflammatory response, and determination of methods for pharmaceutical use in manipulating the inflammatory response.
摘要:
Modified Protein C molecules have been made which substitute the gamma carboxylglutamic acid (Gla) region of another Vitamin K dependent protein, most preferably prothrombin, for the native region of the Protein C. A modified protein C molecules has been made which substitutes the gamma carboxyglutamic acid (Gla) region with the corresponding region of prothrombin. The modified or chimeric protein C has advantages over the wild-type protein C since it is less sensitive to inhibition by some natural antibody inhibitors of protein C (which would otherwise decrease the ability of the protein C to act as an anticoagulant) and which do not need the same cofactors or same amounts of cofactors, and can therefore be effective in patients with lowered levels of the cofactors such as protein S or the lipids present in elevated levels in platelets such as phosphatidyl ethanolamine (PE). The anticoagulant activity of the chimera was tested in normal and factor V Leiden plasma. The chimera was approximately ten times more effective in inhibiting factor V Leiden plasma clotting.
摘要:
A method of treating patients to inhibit inflammation is disclosed. In the method, an effective amount of calmodulin, a calmodulin analogue or calmodulin receptor agonist is administered to a patient to inhibit production of tumor necrosis factor and/or augment elastase. In another method, an effective amount of calmodulin antagonist is administered to a patient to stimulate immune response or inhibit elastase release. In another embodiment, a diagnostic test is disclosed to be used on patient blood samples to determine individual propensity to regulate tumor necrosis factor and/or elastase by calmodulin, its analogues or receptor agonists.
摘要:
A novel method of detecting antibodies to thrombomodulin in plasma or serum as an indication of an individual's propensity to thrombosis or inflammation is disclosed. A method for identifiying patients at risks of thrombosis or glomerular nephritis by monitoring autoantibodies to truncated soluble thrombomodulin is revealed. A preferred method is an ELISA assay to detect antibodies to thrombomodulin.
摘要:
An assay useful for detecting the propensity of patients for thrombotic disease, especially patients having the lupus anticoagulant or antiphospholipid antibodies, is described. The assay is conducted on patient and control plasma in the presence and absence of exogenous Protein C with a membrane source comprising phosphatidylethanolamine and phosphatidylserine. Patients at risk exhibit test results indicating activated Protein C function is inhibited.