A method and kit for detecting the early onset of renal...

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G01N 33/53 (2006.01)

Patent

CA 2520658

A method and kit for detecting the early onset of renal tubular cell injury, utilizing NGAL as an early urinary biomarker. NGAL is a small secreted polypeptide that is protease resistant and consequently readily detected in the urine following renal tubule cell injury. NGAL protein expression is detected predominantly in proximal tubule cells, in a punctate cytoplasmic distribution reminiscent of a secreted protein. The appearance NGAL in the urine is related to the dose and duration of renal ischemia and nephrotoxemia, and is diagnostic of renal tubule cell injury and renal failure. NGAL detection is also a useful marker for monitoring the nephrotoxic side effects of drugs or other therapeutic agents.

L'invention concerne un procédé et une trousse permettant de détecter l'apparition précoce de lésions de cellules tubulaires rénales au moyen de NGAL comme marqueur biologique urinaire précoce, NGAL étant un petit polypeptide sécrété résistant à la protéase et, par conséquent, immédiatement détecté dans l'urine à la suite de lésions de cellules des tubes rénaux. L'expression de la protéine NGAL est principalement détectée dans les cellules des tubes proximaux, dans une distribution cytoplasmique ponctuée rappelant une protéine sécrétée. L'apparence NGAL dans l'urine se rapporte à la dose et à la durée de l'ischémie et de la néphrotoxémie et diagnostique des lésions des cellules des tubes rénaux et une insuffisance rénale. La détection de NGAL constitue également un marqueur utile qui permet de surveiller les effets secondaires néphrotoxiques des médicaments et d'autres agents thérapeutiques.

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