Signal amplification with lollipop probes

C - Chemistry – Metallurgy – 12 – P

Patent

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Details

C12P 19/34 (2006.01) C07H 21/04 (2006.01) C12N 15/00 (2006.01) C12Q 1/68 (2006.01)

Patent

CA 2411794

Disclosed is a method and compositions for the sensitive detection of the amount and location of specific nucleic acid sequences. The method makes use of a branched oligomer, referred to as a lollipop oligomer, that has a tail portion, a right arm portion, and a left arm portion. These three components are joined at a common junction making a three-tailed structure. The two arms each end with sequences complementary to adjacent sequences in a target sequence. This allows the right and left arms to be ligated together when the oligomer is hybridized to the target sequence, thus topologically linking the oligomer to the target sequence. The tail portion can then be detected at the location of the target sequence.

L'invention concerne une méthode et des compositions destinées à la détection sensible de la quantité et de l'emplacement de séquences d'acides nucléiques spécifiques. Ce procédé fait intervenir un oligomère ramifié, appelé oligomère lollipop, comprenant une partie caudale, une partie de bras droit et une partie de bras gauche. Ces trois constituants se rejoignent au niveau d'une jonction commune formant une structure à trois queues. Les deux bras se terminent chacun par des séquences complémentaires aux séquences adjacentes dans une séquence cible. Cela permet aux bras droit et gauche d'être ligaturés ensemble lorsque l'oligomère est hybridé à la séquence cible, d'où la liaison topologique de l'oligomère à la séquence cible. La partie caudale peut alors être détectée à l'emplacement de la séquence cible.

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