Coagulation assay reagents containing lanthanides
First Claim
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1. A dry coagulation assay reagent comprising magnetic particles distributed substantially homogeneously therethrough wherein said reagent is selected from the group consisting of:
- (1) one member selected from the group consisting of prothrombin time reagents and (ii) prothrombin time reagents and calcium salts;
(2) partial thromboplastin time reagents with calcium chloride;
(3) partial thromboplastin time reagents with calcium chloride and clot formation activators;
(4) thrombin or a snake venom with thrombotic activity;
(5) fibrin, or plasminogen and fibrin;
(6) plasminogen activator assay reagents containing (i) plasminogen and (ii) either fibrin, a snake venom with thrombotic activity, or thrombin;
(7) plasminogen assay reagents containing (i) a plasminogen activator and (ii) either fibrin, a snake venom with thrombotic activity, or thrombin;
(8) natural and synthetic plasminogen activators;
(9) alpha-2-antiplasmin assay reagents containing fibrin and plasmin; and
(10) combinations thereof, wherein the reagent further comprises one or more lanthanide metal compounds that interact with calcium binding sites in a blood coagulation cascade.
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Abstract
A method, kit, system and reagent for performing coagulation assays with higher sensitivity and greater dynamic range is provided which involves the use of one or more metal compounds that interact with calcium binding sites in the blood coagulation cascade, particularly lanthanide compounds, manganese compounds and magnesium compounds. A Protein C reagent, kit, and assay method is also provided using the same type of metal compounds to provide greater detection sensitivity and dynamic range between samples.
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Citations
23 Claims
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1. A dry coagulation assay reagent comprising magnetic particles distributed substantially homogeneously therethrough wherein said reagent is selected from the group consisting of:
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(1) one member selected from the group consisting of prothrombin time reagents and (ii) prothrombin time reagents and calcium salts;
(2) partial thromboplastin time reagents with calcium chloride;
(3) partial thromboplastin time reagents with calcium chloride and clot formation activators;
(4) thrombin or a snake venom with thrombotic activity;
(5) fibrin, or plasminogen and fibrin;
(6) plasminogen activator assay reagents containing (i) plasminogen and (ii) either fibrin, a snake venom with thrombotic activity, or thrombin;
(7) plasminogen assay reagents containing (i) a plasminogen activator and (ii) either fibrin, a snake venom with thrombotic activity, or thrombin;
(8) natural and synthetic plasminogen activators;
(9) alpha-2-antiplasmin assay reagents containing fibrin and plasmin; and
(10) combinations thereof, wherein the reagent further comprises one or more lanthanide metal compounds that interact with calcium binding sites in a blood coagulation cascade. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A reagent for performing a Protein C assay, comprising:
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an initiator of an intrinsic blood coagulation pathway or Factor X;
a Protein C activator;
calcium ions; and
one or more lanthanide metal compounds that interact with calcium binding sites in a blood coagulation cascade. - View Dependent Claims (21, 22, 23)
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Specification