System and method for manipulating magnetically responsive...

C - Chemistry – Metallurgy – 12 – M

Patent

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C12M 1/00 (2006.01) B03C 1/28 (2006.01) C12N 15/10 (2006.01) C12N 15/11 (2006.01) C12Q 1/68 (2006.01) G01N 1/28 (2006.01) G01N 35/00 (2006.01) G01N 35/02 (2006.01) G01N 35/10 (2006.01)

Patent

CA 2380919

A system and method for manipulating magnetically responsive particles in a solution to separate nucleic acid molecules from cell components in a cell solution. The system and method employ a device capable of receiving a plurality of tubes, each of which contain respective sample and magnetically responsive particles. The device includes heating and cooling devices to facilitate a lysing step to release the nucleic acid molecules from the cells in the cell solution. The device further includes moveable magnets which can be moved proximate to and away from the tube to hold the magnetically responsive particles to which the nucleic acid molecules become bound, so that the molecule-bound particles can be separated from the remainder of the solution, and washed as appropriate. The system also employs an electromagnet which is capable of demagnetizing the particles to allow the particles to freely mix with solution, such as elution solutions which are used to unbind the molecules from the particles.

Système et méthode de manipulation de particules à sensibilité magnétique dans une solution afin de séparer des molécules d'acide nucléique d'éléments cellulaires dans une solution de cellules. Le système et la méthode font appel à un dispositif capable de recevoir une série de tubes, chacun d'eux contenant un échantillon et des particules à sensibilité magnétique. Le dispositif comprend des appareils de chauffage et de refroidissement afin de faciliter une étape de réaction de lyse pour libérer les molécules d'acide nucléique des cellules dans la solution connexe. Le dispositif comprend également des aimants qui peuvent être rapprochés ou éloignés du tube afin de retenir les particules à sensibilité magnétique auxquelles les molécules d'acide nucléique deviennent liées, de façon à permettre la séparation des particules liées aux molécules du reste de la solution, et de les laver au besoin. Le système comporte également un électro- aimant capable de démagnétiser les particules afin de leur permettre de se mélanger librement avec la solution, par exemple une solution d'élution qui sert à délier les molécules des particules.

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