System and instrument for processing biological samples and manipulating liquids having biological samples
A biological sample processing system comprises a container for large volume processing, a flat polymer film having a lower surface and a hydrophobic upper surface, which is kept at a distance d to the base side of the container by the protrusions. The distance d defines at least one gap when the container is positioned on the film. A liquid droplet manipulation instrument comprises at least one electrode array for inducing liquid droplet movements; a substrate supporting the at least one electrode array; and a control unit is characterized in that the container and the film are reversibly attached to the liquid droplet manipulation instrument. The system thus enables displacement of at least one liquid droplet from the at least one well through the channel of the container onto the hydrophobic upper surface of the flat polymer film and above the at least one electrode array; wherein the liquid droplet manipulation instrument controls a guided movement of the liquid droplet on the hydrophobic upper surface of the flat polymer film by electrowetting and to process there the biological sample.
1. A biological sample processing system ( 1 ) comprising:
a container ( 2 ) for large volume processing having a top side ( 3 ) and a base side ( 4 ) and comprising at least one well ( 6 ) open at the top side ( 3 ) for positioning a biological sample ( 9 ) and/or a reaction reagent ( 10 ) therein, wherein the at least one well ( 6 ) comprises a bottom side ( 8 ) having at least one opening ( 11 ), the container ( 2 ) further comprising a channel ( 12 ) connecting the opening of the well ( 11 ) with an orifice ( 13 ) on the base side ( 4 ) of the container ( 2 ), and wherein the base side ( 4 ) of the container ( 2 ) comprises protrusions ( 5 ) distributed thereon;
a flat polymer film ( 14 ) having a lower surface ( 15 ) and a hydrophobic upper surface ( 16 ), which is kept at a distance d to the base side ( 4 ) of the container ( 2 ) by the protrusions ( 5 ), the distance d defining at least one gap ( 17 ) when the container ( 2 ) is positioned on the film ( 14 ), abutting the latter with its protrusions ( 5 ); and
a liquid droplet manipulation instrument ( 20 ) comprising:
at least one electrode array ( 21 ) for inducing liquid droplet movements;
a substrate ( 22 ) supporting the at least one electrode array ( 21 ); and
a control unit ( 23 ) comprising at least one electrode selector ( 34 ) connected with at least one voltage control ( 29 ), the at least one electrode selector ( 34 ) being accomplished to individually select each electrode ( 35 ) of the at least one electrode array ( 21 ) and provide the selected electrode ( 35 ) with a voltage controlled by a voltage control ( 29 );
wherein the container ( 2 ) and the film ( 14 ) are reversibly attached to the liquid droplet manipulation instrument ( 20 ), the lower surface ( 15 ) of the flat polymer film ( 14 ) thus abutting the at least one electrode array ( 21 ), the system ( 1 ) enabling displacement of at least one liquid droplet ( 19 ) from the at least one well ( 6 ) through the channel ( 12 ) of the container ( 2 ) onto the hydrophobic upper surface ( 16 ) of the flat polymer film ( 14 ) and above the at least one electrode array ( 21 ); and wherein the liquid droplet manipulation instrument ( 20 ) is accomplished to control a guided movement of said liquid droplet ( 19 ) on the hydrophobic upper surface ( 16 ) of the flat polymer film ( 14 ) by electrowetting and to process there the biological sample ( 9 ).
2. The biological sample processing system ( 1 ) according to claim 1 , wherein the container ( 2 ) and the liquid droplet manipulation instrument ( 20 ) each comprise at least one positioning element ( 25 ) for a form-fitted attachment of the container ( 2 ) to the liquid droplet manipulation instrument ( 20 ).
3. The biological sample processing system ( 1 ) according to claim 1 , wherein the at least one well ( 6 ) for positioning a biological sample ( 9 ) is sized to accommodate a solid substrate ( 24 ) carrying the biological sample ( 9 ).
4. The biological sample processing system ( 1 ) according to claim 3 , wherein the solid substrate ( 24 ) is a swab head.
5. The biological sample processing system ( 1 ) according to claim 1 , wherein the biological sample ( 9 ) is contained in a liquid ( 18 ).
6. The biological sample processing system ( 1 ) according to claim 1 , wherein the biological sample ( 9 ) is a nucleic acid.
7. The biological sample processing system ( 1 ) according to claim 1 , wherein at least one well ( 6 ′) is accomplished as storage for a reaction reagent ( 10 ), the stored reaction reagent ( 10 ) comprising reagents selected from a group comprising reagents for performing cell lysis, reagents for performing nucleic acid purification, reagents for performing nucleic acid amplification and reagents for performing sequencing of nucleic acids.
8. The biological sample processing system ( 1 ) according to claim 1 , wherein the gap ( 17 ) between the hydrophobic upper surface ( 16 ) of the film ( 14 ) and the base side ( 4 ) of the container ( 2 ) is less than 2 mm or less than 1 mm.
9. The biological sample processing system ( 1 ) according to claim 1 , wherein the container ( 2 ) is made by injection molding of an electrically insulating or electrically conductive material ( 26 , 27 ).
10. The biological sample processing system ( 1 ) according to claim 1 , wherein the container ( 2 ) comprises means for identification ( 30 ).
11. The biological sample processing system ( 1 ) according to claim 1 , wherein the at least one well ( 6 ) of the container ( 2 ) comprises retention means ( 31 ) for preventing the solid substrate ( 24 ) to block the opening ( 11 ) of said well ( 6 ), the retention means ( 31 ) being selected from a group comprising a filter, a frit and relief structures on the well's ( 6 ) bottom side ( 8 ).
12. The biological sample processing system ( 1 ) according to claim 1 , wherein the at least one liquid droplet ( 19 ) is moved in the gap ( 17 ) within an immiscible system liquid.