Gas permeable cell culture device and method of use
Gas permeable devices and methods are disclosed that provide highly efficient cell culture. Gas compartments, made up at least in part of gas permeable material, are dispersed within the culture device in locations that allow cells to remain within a fixed distance from a gas transmission location as the device scales in the horizontal direction. Gas permeable walls of the gas compartment(s) allow gas exchange with the ambient gas. Such an arrangement provides many advantages including the ability to eliminate the need for a gas-liquid interface, allow cell culture to proceed in the static mode (i.e. absent the need for media or gas to be pumped through the device), allow the scale of the device to increase in both the horizontal direction and vertical direction, reduce the rate of media evaporation, allow uncomplicated and low cost device fabrication, and provide the capacity for reduced feeding frequency.
1. A gas permeable culture device comprising:
a) an access port, and
b) a side wall, a top wall, and a bottom wall, and
c) more than one scaffold oriented one above the other, each of said scaffolds separated by a space, said space forming a cell compartment, and
d) a manifold that connects said access port to said cell compartments, and
e) more than one of said scaffolds having at least one scaffold opening and at least one gas compartment residing within a portion of a void space of said scaffold opening of at least more than one of said scaffolds, said gas compartment having an opening in communication with ambient gas and said gas compartment having at least two walls and at least one wall comprised of gas permeable material, and said at least one wall comprised of gas permeable material not being a scaffold, wherein said at least one wall comprised of gas permeable material of said gas compartment is oriented generally perpendicular to said scaffold.
2. The device of claim 1 wherein said one wall of gas permeable material is present in each cell compartment.
3. The device of claim 1 wherein said side wall is comprised of gas permeable material.
4. The device of claim 1 wherein said side wall is not comprised of gas permeable material.
5. The device of claim 1 wherein one opening to said gas compartment is present and is located on said bottom.
6. The device of claim 1 wherein one opening to said gas compartment is present and is located on said top.
7. The device of claim 1 wherein said opening to said gas compartment is located on said side wall.
8. The device of claim 1 wherein said opening to said gas compartment is located on two opposing walls so that said gas compartment is an opening through the entire gas permeable device.
9. The device of claim 1 wherein said opening to said gas compartment is generally rectangular in shape.
10. The device of claim 1 wherein at least a portion of said side wall of the gas permeable device is comprised of gas permeable material.
11. The device of claim 1 wherein said scaffolds include polystyrene material.
12. The device of claim 1 wherein said gas permeable material of said at least one wall of said gas compartment is silicone.
13. The device of claim 12 wherein said silicone is about 0.022 inches or less in thickness.
14. The device of claim 1 wherein opposing ends of the device each include an access port.
15. The device of claim 14 wherein said gas compartment opening is rectangular and the longest sides of said openings to said gas compartment are generally perpendicular to the opposing ends that the access ports reside in proximity of.
16. The device of claim 1 including a gas compartment support structure.
17. The device of claim 1 wherein the space above the uppermost scaffold exceeds the space between any other scaffolds.
18. The device of claim 1 wherein a gap exists between said scaffolds and walls said side wall and/or said one wall of said gas compartment that are adjacent to said scaffolds.
19. The device of claim 1 wherein said opening to said compartment is at least 0.1 inches in width.
20. The device of claim 1 in which the distance of the furthest location on the upper surface of any said scaffold to gas permeable material does not exceed the distance of the furthest location on the upper surface of any other said scaffold to gas permeable material.
21. The device of claim 1 including being full of media.
22. The device of claim 1 , wherein at least two walls of said gas compartment are comprised of gas permeable material.