Homogeneous time-resolved energy transfer assay

G - Physics – 01 – N

Patent

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Details

G01N 33/58 (2006.01) C12Q 1/68 (2006.01) G01N 33/533 (2006.01) G01N 33/542 (2006.01)

Patent

CA 2541075

The invention relates to a method for improving the detection sensitivity in homogenous TR-FRET based bioaffinity assays. The sensitivity is improved by the use of long lifetime donors together with a high energy transfer efficiency and by carrying out the detection of the energy transfer based emission of the acceptor in a time window which is opened after a delay of 1 microsecond or more, but less than 50 microseconds, calculated from the donor excitation, and which time window has a width of 1 microsecond or more, but less than 100 microseconds. The invention concerns also the use of the improved method in multianalyte assays. Furthermore, the invention concerns a device suitable for carrying out the improved method.

L'invention concerne un procédé permettant d'améliorer la sensibilité de détection dans des dosages homogènes de bioaffinité basés sur le transfert d'énergie de résonance par fluorescence à résolution temporelle (TR-FRET). Cette sensibilité est améliorée par utilisation de donneurs à longue durée de vie associée à une efficacité de transfert d'énergie élevée, et par détection dudit transfert d'énergie en fonction d'une émission d'un accepteur dans une fenêtre temporelle ouverte après un délai de 1 microseconde ou plus mais inférieur à 50 microsecondes, calculé à partir de l'excitation du donneur dont la fenêtre temporelle présente une largeur de 1 microseconde ou plus mais inférieure à 100 microsecondes. L'invention concerne également l'utilisation du procédé amélioré utilisé dans des multianalytes. L'invention concerne enfin un dispositif approprié pour mettre en oeuvre ledit procédé amélioré.

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