Antibody and use thereof

C - Chemistry – Metallurgy – 12 – N

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C12N 15/02 (2006.01) C07K 16/18 (2006.01) C07K 16/26 (2006.01) C12P 21/08 (2006.01) G01N 33/531 (2006.01) G01N 33/68 (2006.01) G01N 33/74 (2006.01)

Patent

CA 2328416

Monoclonal antibodies (in particular, P2L-1Ca) against 19P2 ligand having an extremely high avidity and being capable of neutralizing the arachidonic acid metabolite-releasing activity of the 19P2 ligand. Thus, these antibodies are usable in diagnostics, preventives, remedies, etc. for various diseases in association with abnormalities in the pituitary function regulatory mechanism (for example, promotion of the prolactin secretion), the central nerve regulatory mechanism, the pancreatic function regulatory mechanism, etc. The 19P2 ligand or its derivatives can be specifically quantitated at a high sensitivity by an immunoassay method based on the sandwich method with the use of the above-mentioned monoclonal antibodies (in particular, the sandwich method with the use of the monoclonal antibody together with an antibody recognizing the intermediate part of the 19P2 ligand). This quantitating method is usable in clarifying the physiological functions of the 19P2 ligand or its derivative.

L'invention porte sur des anticorps monoclonaux (notamment P2L-1Ca) contre le ligand 19P2, ces anticorps ayant une très grande avidité et pouvant neutraliser l'activité libérant les métabolites de l'acide arachidonique du ligand 19P2. Il est donc possible d'utiliser ces anticorps dans les méthodes diagnostiques et préventives, dans les remèdes, etc., pour traiter diverses pathologies associées à des anomalies du mécanisme de régulation de la fonction pituitaire (par exemple, l'activation de la sécrétion de la prolactine), du système nerveux central, de la fonction pancréatique, etc. Le ligand 19P2 et ses dérivés peuvent être quantifiés de manière spécifique à une très haute sensibilité par un procédé d'immuno-essai sur la base d'un procédé sandwich à l'aide des anticorps monoclonaux précités (notamment, à l'aide de l'anticorps monoclonal et d'un anticorps reconnaissant la partie intermédiaire du ligand P2). Ce procédé de quantification peut être utilisé pour clarifier les fonctions physiologiques du ligand 19P2 ou de ses dérivés.

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