Method for detecting autoprocessed, secreted pcsk9

C - Chemistry – Metallurgy – 12 – N

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C12N 9/64 (2006.01) A61K 48/00 (2006.01) C07K 14/435 (2006.01) C12Q 1/37 (2006.01) C12Q 1/68 (2006.01) G01N 33/573 (2006.01)

Patent

CA 2680832

The present invention provides a method for detecting autoprocessed, secreted PCSK9, a protein involved in cholesterol homeostasis, and for effectively identifying compounds that inhibit autocleavage and secretion from cells. The disclosed method involves the insertion of an epitope tag into a PCSK9 expression construct immediately C-terminal to the pro domain ending at an amino acid residue corresponding to Q152 of human PCSK9. Upon autoprocessing, the epitope tag is exposed and capable of recognition by anti-epitope antibodies or other suitable identification system, allowing for the selective and exclusive identification and/or quantification of processed PCSK9. The present disclosure thus advances the goal of providing enabling technology to the art for the effective identification of therapeutics effective in combating coronary heart disease.

La présente invention concerne un procédé de détection de PCSK9 sécrétée, autogénérée, une protéine impliquée dans l'homéostase du cholestérol, et d'identification efficace de composés inhibant l'autoclivage et la sécrétion à partir de cellules. Le procédé divulgué consiste à insérer un marqueur épitope dans une construction d'expression de PCSK9 immédiatement en C terminal dans le pro-domaine se terminant par un résidu acide aminé correspondant à Q152 de la PCSK9 humaine. Lors de l'autogénération, le marqueur épitope est exposé et capable d'être reconnu par des anticorps anti-épitopes ou un autre système d'identification approprié, permettant une identification et/ou une quantification sélective et exclusive des PCSK9 générées. La présente invention vise donc à fournir une technologie permettant l'identification efficace de traitements thérapeutiques destinés à combattre une maladie coronarienne.

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