Flexible bottom culture plate for applying mechanical load to cell cultures

• US 6,048,723 A
• Filed: 11/30/1998
• Issued: 04/11/2000
• Est. Priority Date: 12/02/1997
• Status: Expired due to Term

• Current Assignee: Flexcell International Corporation (Global PVQ SE)
• Original Assignee: Flexcell International Corporation (Global PVQ SE)
• Inventors: Banes, Albert J.
• Primary Examiner(s): Redding, David A.
• Application Number:
  US09/201,570
• Time in Patent Office: 498 Days
• Field of Search: 435/287.1, 435/288.3, 435/288.4, 435/305.1, 435/305.2, 435/305.4
• US Class Current: 435/305.1
• CPC Class Codes: C12M 23/12 Well or multiwell plates C12M25/04 takes precedence
• CPC Class Codes: C12M 23/26 flexible flexible containers for laboratory use B01L3/505
• CPC Class Codes: C12M 35/04 Mechanical means, e.g. sonic waves, stretching forces, pressure or shear stimuli

Abstract

A cell culture plate having a flexible membrane sandwiched between a base and a body. Each of the base and body have a plurality of mutually aligned openings. A wall surrounds each opening in the body thereby forming a cell culture well with a portion of the membrane functioning as the floor of the well. When a pressure differential is applied to the underside of the membrane, the membrane stretches, inducing strain on cells cultured thereon. The cell culture plate is sealingly positioned within a recess of a baseplate. An opening defined in the recess communicates with a pressure supply and provides fluid access to the cell culture plate underside to induce the pressure differential thereon.

Claims

1. A cell culture plate comprising:

a base having an upper surface and defining a base opening;

a flexible membrane covering said base opening and a portion of said upper surface, said covered opening defining a cell culture surface; and

a body engaged with said base such that said flexible membrane is fixed between said base and said body, wherein said body defines a body opening aligned with said base opening and includes a well wall extending from an upper surface of said body and surrounding said body opening, whereby said cell culture surface and said well wall define a well.

2. The cell culture plate as claimed in claim 1 wherein said base upper surface defines a groove surrounding said base opening and said body includes a tongue extending from a lower surface of said body, with said tongue matingly engaging with said groove thereby fixing said flexible member between said tongue and said groove.

3. The cell culture plate as claimed in claim 1 further comprising a spacer positioned between said base and said body, with said spacer adapted to maintain said body spaced apart from said base.

4. The cell culture plate as claimed in claim 3 wherein said spacer comprises a post and said flexible membrane defines an aperture, with said post extending through said aperture.

5. The cell culture plate as claimed in claim 4 wherein said post is integral with one of said body and said base, and said post is fixed to the other of said body and said base.

6. The cell culture plate as claimed in claim 1 wherein said base defines a plurality of base openings covered by said membrane and said body defines a plurality of body openings, with each said body opening axially aligned with one of said base openings, with each said body opening being surrounded by a well wall extending from said body upper surface and a tongue extending from said body lower surface, and with each said base opening being surrounded by a groove matingly engaged with one of said tongues.

7. The cell culture plate as claimed in claim 6 wherein said body further includes a side wall surrounding all of said well walls and at least one body rib extending between outer surfaces of a pair of said well walls and at least one body rib extending between an outer surface of one said well wall and said side wall.

8. The cell culture plate as claimed in claim 7 wherein said base further includes:

a plurality of support walls extending from a lower surface of said base, with each said support wall surrounding one of said base openings;

a base wall surrounding said support walls; and

at least one rib extending between outer surfaces of a pair of said support walls and at least one rib extending between an outer surface of one said support wall and said base wall.

9. The cell culture plate as claimed in claim 1 wherein said membrane is formed from a silicone material.

10. A cell culture well comprising:

an annular member defining a chamber and a port in fluid communication with said chamber, said annular member having a wall, a top surface and a base;

a flexible membrane extending across said top surface; and

a plate defining an opening, with said plate overlying said flexible member and attached to said annular member, wherein said port is configured to be connected to a pressure supply, such that when a pressure differential is provided from the pressure supply, said flexible membrane is stretched.

11. The cell culture well as claimed in claim 10 further comprising a sealing ring disposed in a groove in said top surface and a plurality of fasteners extending through said plate and into said top surface.

12. The cell culture well as claimed in claim 10 wherein said base defines an aperture aligned with said opening.

13. The cell culture well as claimed in claim 10 wherein when the pressure supply is a vacuum source and a negative pressure is provided, said flexible membrane is stretched downwardly.

14. The cell culture well as claimed in claim 10 wherein when the pressure supply is a positive pressure source and a positive pressure is applied, said flexible membrane is stretched upwardly.

15. A cell culture plate assembly comprising:

a cell culture plate having (i) a base having an upper surface and defining a base opening;

(ii) a flexible membrane covering said base opening and a portion of said upper surface, with said covered opening defining a cell culture surface; and

(iii) a body engaged with said base such that said flexible membrane is fixed between said base and said body, wherein said body defines a body opening aligned with said base opening and includes a well wall extending from an upper surface of said body and surrounding said body opening, whereby said cell culture surface and said well wall define a well; and

a baseplate defining a recessed portion having a bottom surface with a central opening therethrough, with said cell culture plate sealingly fitted within said recessed portion, with said baseplate further defining a port and a passageway through said baseplate in fluid communication with said port and said central opening.

16. A cell culture plate assembly as claimed in claim 15 further comprising a gasket surrounding said cell culture plate, with said gasket sealingly fitted within said recessed portion.

17. A cell culture plate assembly as claimed in claim 16 wherein said baseplate defines a plurality of said recessed portions, and wherein a central opening defined in each recessed portion is equidistantly located from said port, with said assembly further comprising a plurality of said cell culture plates, each of which are sealingly fitted within one of said recessed portions.

18. The cell culture plate assembly as claimed in claim 15 further comprising a plurality of cell culture lids, with each said lid sized to fit over one of said cell culture plates.

19. The cell culture plate assembly as claimed in claim 15 wherein said port is configured to be connected to a pressure supply, such that said cell culture surface is stretched when a pressure differential is provided from the pressure supply.

20. The cell culture plate assembly as claimed in claim 19 wherein said cell culture surface is stretched downwardly when the pressure supply is a vacuum source and a negative pressure differential is provided.

21. A cell culture baseplate comprising a body defining a recessed portion having a bottom surface with a central opening therethrough, with said body further defining a port and a passageway through said body in fluid communication with said port and said central opening, wherein said recessed portion is configured to receive a cell culture plate and said port is configured to be coupled to a means for inducing a pressure change in said passageway and on an underside of the cell culture plate.

22. The baseplate as claimed in claim 21 wherein said body defines a plurality of said recessed portions and said central opening in each recessed portion is equidistantly located from said port.