Method and apparatus for bulk enrichment of a population or...

C - Chemistry – Metallurgy – 12 – Q

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C12Q 1/24 (2006.01) C12Q 1/04 (2006.01) G01N 33/537 (2006.01) G01N 33/543 (2006.01) G01N 33/553 (2006.01) G01N 33/569 (2006.01)

Patent

CA 2236871

A cell population or subpopulation enrichment procedure (10) for separating undesired populations or subpopulations from a biological sample (12) utilizing relatively heavy, dense particles (14) and gravity sedimentation. The particles have one or more reactants bound thereto which are specific to and will bind with the selected population or subpopulation to be eliminated from the sample. The particles preferably are mixed with the sample by repeatedly causing the particles to settle through a substantial portion of the sample to bind to the selected population. The particles with the bound selected population to be eliminated then are allowed to preferentially settle in the sample and the supernatant including the enriched population or subpopulation is separated from the particles with the population to be eliminated bound thereto. The enriched population supernatant can then be analyzed, utilized as is, have other populations or subpopulations removed or have additional amounts of remaining cells of the previously eliminated populations removed in additional steps.

Procédé d'enrichissement (10) d'une population ou sous-population cellulaire, qui permet de séparer d'un échantillon biologique (12) les populations ou sous-populations indésirables, et qui utilise des particules denses relativement lourdes (14) et la sédimentation gravimétrique. Les particules portent fixés sur elles un ou plusieurs réactifs spécifiques de la population ou sous-population que l'on cherche à éliminer de l'échantillon, et qui vont se fixer sur celle-ci. De préférence, on mélange les particules à l'échantillon par sédimentation répétée dans une partie substantielle de l'échantillon, de façon à les fixer sur la population choisie. Puis on laisse les particules fixées à la population que l'on a choisi d'éliminer se déposer de façon préférentielle dans l'échantillon, et on sépare des particules portant fixées sur elles la population à éliminer le surnageant contenant la population ou sous-population enrichie. On peut ensuite analyser le surnageant de population enrichie, l'utiliser tel quel, éliminer d'autres populations ou sous-populations, ou, par des étapes supplémentaires, éliminer des quantités supplémentaires de cellules restantes appartenant aux populations précédemment éliminées.

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