C - Chemistry – Metallurgy – 12 – Q
Patent
C - Chemistry, Metallurgy
12
Q
C12Q 1/68 (2006.01)
Patent
CA 2414986
A method for the identification of foetal DNA in a maternal DNA-containing sample such as a blood or vaginal sample, said method comprising (a) isolating DNA from said sample, (b) subjecting said DNA to exonucleolytic digestion by an enzyme so as to remove end regions of each DNA molecule, and (c) detecting the presence of a DNA sequence remaining in foetal DNA but absent form maternal DNA as a result of said digestion process. Once identified, the foetal DNA can be subject to diagnosis for example to detect chromosomal /DNA abnormalities, including in particular aneuploides such as foetal trisomy 21.
L'invention concerne une procédé d'identification de l'ADN foetal dans un échantillon maternel contenant de l'ADN, par exemple un échantillon sanguin ou vaginal, caractérisé (a) en ce qu'on isole l'ADN dudit échantillon, (b) on soumet l'ADN à une digestion exonucléolytique par une enzyme, de manière à éliminer les régions terminales de chaque molécule d'ADN et, (c) on détecte la présence d'une séquence ADN restant dans l'ADN foetal, mais absente de l'ADN maternel, consécutivement au processus de digestion. Une fois identifié, l'ADN foetal peut être soumis au diagnostic, par exemple, en vue de détecter des anomalies chromosomiques /ADN, et notamment, des aneuploïdes tels que la trisomie 21 foetale.
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Btg International Limited
Simeg Limited
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