Method for measurement of physiologically active substance...

G - Physics – 01 – N

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G01N 21/47 (2006.01) G01N 21/77 (2006.01) G01N 33/53 (2006.01) G01N 33/579 (2006.01)

Patent

CA 2732011

Disclosed is a measurement method which can largely reduce the time required for the detection of a physiologically active substance derived from an organism (e.g., an endotoxin, .beta.-D-glucan) or the determination of the concentration of the physiologically active substance by utilizing the reaction between the physiologically active substance and LAL. Also disclosed is a measurement apparatus utilizing the measurement method. An incident light from a light source is focused onto a sample and delivered to the sample to cause the bombardment with coagulin which is a final product of a protease cascade (i.e., a coagulin monomer) and an extremely fine aggregate which is produced by the aggregation of the coagulin monomers (i.e., a coagulin aggregate), thereby generating a scattered light. The scattered light is detected by a light-receiving element. The concentration of the endotoxin can be determined based on the initial rate of increase in the scattered light detected.

L'invention porte sur un procédé de mesure qui peut grandement réduire le temps requis pour la détection d'une substance active physiologiquement issue d'un organisme (par exemple, une endotoxine, glucane ß-D) ou la détermination de la concentration de la substance active physiologiquement par utilisation de la réaction entre la substance active physiologiquement et LAL. L'invention porte également sur un appareil de mesure mettant en uvre le procédé de mesure. Une lumière incidente provenant d'une source de lumière est concentrée sur un échantillon et délivrée à l'échantillon pour provoquer le bombardement avec de la coaguline qui est un produit final d'une cascade de protéase (c'est-à-dire un monomère de coaguline) et un agrégat extrêmement fin qui est produit par l'agrégation de monomères de coaguline (c'est-à-dire un agrégat de coaguline), générant ainsi une lumière diffuse. La lumière diffuse est détectée par un élément de réception de lumière. La concentration de l'endotoxine peut être déterminée en fonction du taux d'augmentation initial dans la lumière diffuse détectée.

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