Cell culturing systems, methods and apparatus

• US 20050287670A1
• Filed: 03/23/2005
• Published: 12/29/2005
• Est. Priority Date: 06/29/2004
• Status: Abandoned Application

• Current Assignee: Kreido Laboratories, Inc.
• Original Assignee: Kreido Laboratories, Inc.
• Inventors: McGrevy, Alan N., Seymour, Jerry P., Lichtenberger, Philip L., Gulliver, Eric A., Kozlowski, Michael R.
• Application Number:
  US11/088,638
• Publication Number:
  US 20050287670A1
• Time in Patent Office: Days
• US Class Current: 435/455
• CPC Class Codes: C12M 27/02 Stirrer or mobile mixing elements
• CPC Class Codes: C12M 29/04 Filters; Permeable or porous membranes or plates, e.g. dialysis
• CPC Class Codes: C12M 41/22 in contact with the bioreactor walls

Abstract

The present disclosure provides cell-culturing methods, apparatus and systems wherein cells in cell cultures are subjected to novel shear forces, which provide improved and efficient target product production. The shear force is provided by a reactor apparatus connected to a cell culture apparatus by a pump for transporting said cell culture from said cell culture apparatus via a first conduit operably connecting said cell culture apparatus to an inlet of a reactor apparatus. The reactor apparatus includes a chamber wherein the cell culture is received and submitted to a shear force as it passes therethrough. The chamber can include a plurality of filters to retain the cells in the cell culture while collecting cell culture media. A stator and a rotor of the reactor apparatus can define the chamber.

Claims

1. A cell culturing system, comprising:

a cell culture including cell culture media and a plurality of cells;

a cell culture apparatus containing and maintaining said cell culture; and

a reactor apparatus connected to the cell culture apparatus, the reactor apparatus including a chamber wherein the chamber is an annular gap defined by a rotor and a stator wherein at least a portion of said cell culture is received and is submitted to a shear force in the absence of Taylor vortices.

2. A cell culturing system as defined in claim 1 wherein the reactor apparatus is connected to the cell culture apparatus by a pump for transporting said at least portion of said cell culture from said cell culture apparatus via a first conduit operably connected to said cell culture apparatus and to at least one inlet of said reactor apparatus.

3. A cell culturing system as defined in claim 1 wherein the chamber includes at least one cell-retaining filter to retain cells of said cell culture in said chamber while allowing for the passage of cell culture media.

4. A cell culturing system as defined in claim 2, further comprising:

an outer shell proximally disposed to an outer wall of said stator to define a temperature control passage configured for passage of a heat exchange fluid; and

a second conduit in operable communication between a processing outlet of said reactor apparatus and said cell culture apparatus.

5. The cell culturing system of claim 1, wherein said cell culture is a suspension cell culture and wherein said cells are selected from the group consisting of mammalian, plant, yeast, bacterial or fungal cells.

6. The cell culturing system of claim 5, where said cells include at least one transgene.

7. The culturing system of claim 1, wherein a temperature of said cell culture passing through said chamber is maintained to within about 0.1 to 1 degree centigrade of a desired cell culture temperature.

8. The culturing system of claim 2, wherein said rotor includes conduits that receive cell culture media removed from said annular gap via passage through the at least one cell-retaining filter in communication with said rotor.

9. The culturing system of claim 2, wherein at least one of said rotor or stator is made up of a material that is sterilizable.

10. The culturing system of claim 9, wherein said material is one of a high performance alloy, stainless steel, aluminum or aluminum alloy.

22. The method of claim 1, wherein said cells are mammalian or plant or bacterial or fungal cells.

11. A method for culturing cells, comprising:

providing a cell culture including cells and cell culture media;

providing a cell culturing apparatus into which said cell culture is disposed;

providing a reactor apparatus in operable connection with said a cell culturing apparatus;

removing at least a portion of said cell culture from said cell culturing apparatus to said reactor apparatus;

passing said portion of said cell culture through a chamber provided by a rotor and a stator of said reactor apparatus, wherein either one or both of rotor and stator rotate relative to each other;

subjecting said portion of said cell culture to a shear force within said chamber, said shear force provided by rotation of either or both said rotor and stator and in the absence of Taylor vortices; and

returning said portion of said cell culture to said cell culturing apparatus.

12. A method for culturing cells as in claim 11, wherein said chamber is an annular processing gap.

13. The method of claim 11, further comprising the step of maintaining said portion of said cell culture, as said portion of said cell culture passes through the chamber, at a temperature that this substantially similar to cell culture temperature within said cell culturing apparatus from which said portion of said cell culture originates.

14. The method of claim 11, further comprising the step of collecting a cell culture product, produced by cells of said cell culture.

15. The method of claim 14, wherein said collecting step includes the step of removal of at least a portion of said cell culture media from said cell culture.

16. The method of claim 15, wherein said collecting step of said portion of said cell media includes a perfusing step, wherein additional cell culture media is added to said cell culture.

17. The method of claim 16, wherein said removed portion of said cell culture media from said cell culture is removed via passage through a cell-filtering membrane which provides transport of cell culture media and not cells therethrough.

18. The method of claim 16, wherein said cell-filtering membrane is disposed on said rotor or said stator or both.

19. The method of claim 16, further comprising the step of collecting a cell culture product, produced by said cells of said cell culture that is carried by said removed portion of cell culture media.

20. The method of claim 11, wherein said cells of said cell culture contain at least one transgene.

21. The method of claim 13 or 19, wherein said cell culture product is a protein.

23. A cell culture product produced in accordance with the method of claim 11.

24. A reactor apparatus for cell culturing, comprising:

a stator having a generally cylindrical shape;

a rotor having a generally cylindrical shape, the rotor being located within the stator;

the inside surface of the stator and the outside surface of the rotor defining an annular gap having a gap width;

wherein the annular gap is adapted to receive a cell culture medium containing cells;

wherein the rotor is adapted to rotating within the stator, wherein rotation of the rotor imparts a shear force to the cells; and

wherein the gap width is configured so that as the rotor rotates Taylor vortices are not induced.

25. The reactor apparatus of claim 24 wherein the cell culture medium has a viscosity and the gap width is configured as a function of the cell culture viscosity and the rotation speed of the rotor.

26. The reactor apparatus of claim 24 wherein the cell culture medium has a viscosity and the gap width is configured as a function of the cell culture viscosity, the radius of the rotor and the rotation speed of the rotor.

27. The reactor apparatus of claim 24 wherein the cell culture medium has a viscosity and a fluid density, and the gap width is configured as a function of the cell culture viscosity, the rotation speed of the rotor and the fluid density of the cell culture.

28. A reactor apparatus for cell culturing, comprising:

a stator having a generally cylindrical shape;

a rotor having a generally cylindrical shape, the rotor being located within the stator;

the inside surface of the stator and the outside surface of the rotor defining an annular gap having a gap width;

wherein the annular gap is adapted to receive a cell culture medium containing cells;

wherein the cell culture medium has a viscosity and a fluid density;

wherein the rotor is adapted to rotating within the stator, wherein rotation of the rotor imparts a shear force to the cells; and

wherein the gap width, rotation speed of the rotor and radius of the rotor are chosen in view of the cell culture viscosity and fluid density so that as the rotor rotates Taylor vortices are not induced.

29. A method for culturing cells, comprising:

providing a cell culture including cells and a cell culture medium wherein the cell culture medium has a viscosity and a fluid density;

providing a reactor apparatus including a stator having a generally cylindrical shape and a rotor having a generally cylindrical shape, the rotor being located within the stator and the inside surface of the stator and the outside surface of the rotor defining an annular gap having a gap width wherein the annular gap is adapted to receive a cell culture medium containing cells;

rotating the rotor within the stator, whereby the rotation of the rotor imparts a shear force to the cells; and

providing a gap width, rotation speed of the rotor and radius of the rotor as a function of the cell culture viscosity and fluid density so that as the rotor rotates Taylor vortices are not induced.