A method is directed to determining a thrombosis function and includes flowing a fluid sample over a surface having a fixed endothelial cell monolayer. The method further includes stimulating the fixed endothelial cell monolayer to induce formation of a clot, the clot being formed via interaction between the fixed endothelial cell monolayer and the fluid sample. In response to the clot formation, the method further includes determining a thrombosis function associated with the fluid sample and the fixed endothelial cell monolayer.

Provided herein are compositions, systems, kits, and methods for expressing a peptide of interest, such as Apolipoprotein H (ApoH), also known as 2-glycoprotein I (2GPI), at increased levels using a non-ApoH signal peptide (e.g., a signal peptide that permits increased protein export from cells). Also provided herein are compositions, systems, kits, and methods for employing such recombinant ApoH with a non-ApoH signal peptide to detect subject Apolipoprotein H antibodies in a sample from a subject (e.g., to diagnose antiphospholipid syndrome in a subject).

The present invention relates to various soluble forms of CD31, including a novel form which is shed by activated platelets and released into the circulation. Methods for detecting said soluble forms of CD31 are disclosed, as are methods of specifically 1 detecting said platelet-derived shed CD31 and the use of such methods as a diagnostic tool.

The invention relates to methods and products associated with in vivo enzyme profiling. In particular, biomarker nanoparticles capable of quantitatively detecting enzymatic activity in vivo are described. These nanoparticles can be used to detect in vivo enzyme activity. The invention also relates to products, kits, and databases for use in the methods of the invention.

Compositions and methods are provided for determining platelet reactivity where the levels of FcRIIa on the surface of platelets is measured and if the levels of FcRIIa are greater than a reference value, the platelets have enhanced reactivity.

The present invention concerns clusterin for use in the treatment of thrombotic microangiopathies, and a pharmaceutical composition comprising clusterin for use in the treatment of thrombotic microangiopathies, said composition not comprising von Willebrand factor protease. The present invention also concerns an ex vivo method for stratifying a patient suffering, or likely to be suffering, from TMA, comprising the following steps: 1) measuring, in a biological sample from said patient, the amount L.sub.C of clusterin, and 2) comparing the amount L.sub.c measured in step 1) with an amount L.sub.ref of clusterin by calculating the score S1=L.sub.C/L.sub.ref, in which: If S11, the patient is considered to be likely to benefit from a treatment of the TMA with clusterin, If S1>1, the patient is not considered to be likely to benefit from treatment of TMA with clusterin.

Described herein are method(s), kit(s), reagent(s) and the like for determining von Willebrand factor (VWF) activity in a sample in the absence of ristocetin.

Specific single nucleotide polymorphisms (SNPs) in the human genome, and their association with deep vein thrombosis (DVT) and related pathologies, such as pulmonary embolism (PE), in relation with hormonal preparations (i.e. combined contraceptives, hormone replacement therapeutics) and hormone levels (i.e. during pregnancy and post-partum).

The invention relates to methods and products associated with in vivo enzyme profiling. In particular, biomarker nanoparticles capable of quantitatively detecting enzymatic activity in vivo are described. These nanoparticles can be used to detect in vivo enzyme activity. The invention also relates to products, kits, and databases for use in the methods of the invention.

A method for determining a patient's likelihood of experiencing a thromboembolic event when receiving an implantable blood contacting medical device. The method includes extracting a sample of blood from the patient. The sample of blood is exposed to a metal, metal alloy, or ceramic in a test tube. The sample of the blood is agitated in the test tube. A thromboembolic marker for the sample in the test tube is measured. If the thromboembolic marker for the sample in the test tube is higher than a predetermined thromboembolic marker threshold, it is determined that the patient is likely to experience the thromboembolic event when receiving the blood contacting implantable medical device.