Immunoassay of human medullasin and diagnosis of multiple...

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G01N 33/532 (2006.01) G01N 33/535 (2006.01) G01N 33/564 (2006.01) G01N 33/573 (2006.01) G01N 33/58 (2006.01)

Patent

CA 2327414

There is provided an immunoassay by which the amount of human medullasin present inside granulocytes, which are one leukocyte component in blood, can be determined with high accuracy and with good reproducibility. An immunoassay of medullasin, wherein when measuring the medullasin in blood using an anti-human medullasin antibody, the determination of the amount of human medullasin in a blood sample using said anti-human medullasin antibody is carried out after treating the blood sample with an aqueous liquid having a specific osmotic pressure different to the osmotic pressure of blood to completely break up the leukocytes; and a method of diagnosing multiple sclerosis characterized in that the human medullasin content of a blood sample is measured using an immunoassay, and the onset of multiple sclerosis and the extent of the disease is diagnosed according to the size of, or changes in, this measured value.

L'invention porte sur un essai immunologique grâce auquel la quantité de médullasine humaine présente dans les granulocytes, un type de leucocyte sanguin, peut être mesurée avec une grande exactitude et une grande reproductibilité. L'essai immunologique de la médullasine permet de mesurer chez l'humain à l'aide d'un anticorps anti-médullasine humaine la quantité de médullasine présente dans un échantillon de sang préalablement traité avec une solution aqueuse présentant une pression osmotique spécifique différente de celle du sang, cette différence permettant la lyse complète des leucocytes. L'invention concerne aussi une méthode permettant de diagnostiquer la sclérose en plaques en mesurant au moyen d'un essai immunologique la quantité de médullasine humaine d'un échantillon de sang et de déterminer la présence et la gravité de la maladie en fonction de la valeur mesurée ou de la variation de cette valeur.

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