Apolipoprotein a-ii isoform as a biomarker for prostate cancer

C - Chemistry – Metallurgy – 12 – Q

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C12Q 1/00 (2006.01) G01N 33/53 (2006.01)

Patent

CA 2593184

The present invention provides a protein-based biomarker, ApoA-II isoform, that is useful in determining prostate cancer status in a patient. In particular, the biomarker of this invention is useful to classify a biological sample as prostate cancer or non-prostate cancer. The ability of ApoA-H to detect disease in patients with a normal prostate-specific antigen (PSA) makes the biomarker of this invention useful in identifying indolent disease. The biomarker can be detected by SELDI mass spectrometry, HPLC, PAGE and Western blotting.

La présente invention se rapporte à un biomarqueur basé sur une protéine, l'isoforme d'ApoA-II, qui s'avère utile pour déterminer le statut d'un cancer de la prostate chez un patient. Le biomarqueur de la présente invention s'avère en particulier utile pour classer un échantillon biologique comme cancer de la prostate ou non cancer de la prostate. La capacité de l'ApoA-II à déceler la maladie chez des patients avec un antigène spécifique de la prostate (PSA) normal, rend ce marqueur utile pour l'identification d'une maladie indolente. Le biomarqueur de cette invention peut être détecté par spectrométrie de masse SELDI, par chromatographie liquide à haute performance (CLHP), par électrophorèse en gel d'acrylamide (PAGE) et par Western blot.

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