A new method to measure and characterize microvesicles in...

G - Physics – 01 – N

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G01N 33/53 (2006.01) G01N 33/569 (2006.01) G01N 33/574 (2006.01)

Patent

CA 2713196

This disclosure provides a method to capture, detect, characterize and quantify human exosomes in small volumes of human body fluids by using a sandwich ELISA test. This method allows a full characterization of an exosome preparation, thus providing a tool to distinguish a disease-related condition from a healthy state, by the use of a non-invasive assay. In fact, this method may be useful in either screening, diagnosis and prognosis of tumors, with a simple plasma sample. At the same time measurement of circulating exosomes may provide information on the level of tumor mass present in a patient. The method provided here is suitable to evaluate presence of some infectious and/or transmissible agents, such as viral proteins or prion proteins, within circulating exosomes.

La présente invention concerne un procédé de capture, de détection, de caractérisation et de quantification d'exosomes humains dans de faibles volumes de liquides organiques au moyen d'un test ELISA sandwich. Le procédé permet une caractérisation complète d'une préparation d'exosomes, fournissant ainsi un outil permettant de distinguer entre une condition liée à la maladie et un état de santé, en employant une analyse non invasive. En fait, ce procédé peut être utile dans le dépistage, le diagnostic et le pronostic de tumeurs, avec un simple échantillon plasmatique. En même temps la mesure d'exosomes en circulation peut fournir une information concernant le niveau de masse tumorale présente chez un patient. Le procédé selon l'invention est approprié pour l'évaluation de la présence de certains agents infectieux et/ou transmissibles, telles que des protéines virales ou des protéines prions, dans les exosomes en circulation.

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