Telomerase assay of body fluids for cancer screening and...

C - Chemistry – Metallurgy – 12 – Q

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C12Q 1/00 (2006.01) C12P 19/34 (2006.01) C12Q 1/68 (2006.01)

Patent

CA 2321259

Elevated telomerase activity levels in tissue and cell extracts have been used to determine the presence of cancer in a tissue sample. The invention herein is directed to an improved telomeric repeat amplification protocol (TRAP) assay for quantitating telomerase RNA or telomerase activity levels, using easily obtainable body fluids, such as blood, plasma, lymph, pleural fluid, spinal fluid, saliva, sputum, urine, and semen, for example, to both detect the presence of cancer as well as assess the stage of the disease and the prognosis of the patient. The improved TRAP assay can be used as a diagnostic marker for malignancy as well as a means of monitoring the progress and effectiveness of cancer therapies.

Les taux élevés de l'activité de la télomérase dans des extraits de tissus et de cellules ont été utilisés pour le dépistage du cancer dans un échantillon tissulaire. Cette invention concerne un dosage amélioré d'un protocole d'amplification télomérique répétée (TRAP) pour quantifier l'ARN télomérase ou les taux d'activité de la télomérase, en utilisant des liquides organiques pouvant être obtenus facilement, tels que le sang, le plasma, la lymphe, le liquide pleural, le liquide céphalorachidien spinal, la salive, l'expectoration, l'urine et le sperme pour à la fois dépister le cancer, et évaluer le stade d'évolution de la maladie chez un patient et en établir le pronostic. Par ailleurs, on peut utiliser le dosage TRAP amélioré comme marqueur diagnostique tumoral et comme moyen de surveillance de l'évolution et de l'efficacité des cancérothérapies.

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