Devices for cell assays

• US 9,968,935 B2
• Filed: 08/20/2008
• Issued: 05/15/2018
• Est. Priority Date: 08/20/2007
• Status: Active Grant

• Current Assignee: Platypus Technologies, LLC
• Original Assignee: Platypus Technologies, LLC
• Inventors: Abbott, Nicholas, Murphy, Christopher, Israel, Barbara, Sotos, Josh, Hansmann, Doug, Herber, Renee, Burkholder, Joseph, Hulkower, Keren, Bonds, Michael
• Primary Examiner(s): Long, Scott
• Assistant Examiner(s): Martin, Paul C
• Application Number:
  US12/195,007
• Publication Number:
  US 20090054262A1
• Time in Patent Office: 3,555 Days
• Field of Search: 4352881, 435 71
• CPC Class Codes: B01L 2200/0668 Trapping microscopic beads
• CPC Class Codes: B01L 2300/0829 Multi-well plates; Microtitration plates
• CPC Class Codes: B01L 2300/0851 Bottom walls
• CPC Class Codes: B01L 3/5085 for multiple samples, e.g. microtitration plates

Abstract

The present invention relates to the field of molecular diagnostics. In particular, the present invention provided improved substrates and methods of using liquid crystals and other biophotonically based assays for quantitating the amount of an analyte in a sample. The present invention also provides materials and methods for detecting non-specific binding of an analyte to a substrate by using a liquid crystal or other biophotonically based assay formats.

Claims

1. A cell assay device comprising:

a multiwell plate comprising a plurality of wells having one or more cell assay zones on the bottom surface of said wells in said multiwell plate, said assay zones comprising one or more spatially distinct cell seeding zones comprising a surface to which cells can adhere positioned adjacent to one or more spatially distinct cell exclusion zones comprising a blocking material deposited on said bottom surface of said wells to block adherence of cells to the surface of said cell exclusion zone, wherein said blocking material is selected from the group consisting of poly n-butyl hemiester of [poly(maleic anhydride-alt-2-methoxyethyl-vinyl ether), poly N-isopropylacrylamide, poly(lactic acid), poly[(lactic acid-co-(glycolic acid)], poly(ethylene oxide), poly(propylene oxide), N-isopropylacrylamide copolymers, cellulose acetate butyrate polymers, perfluorocarbon terminated polymers, poly(N,N-diethylacrylamide), N-isopropylacrylamide, diethyleneglycol methacrylate (poly(NiPAAm-co-DEGMA) copolymers, alginate, starch glycogen, chitin, xanthan gum, dextran, gellan gum, glucomannan, hydroxypropyl cellulose, hydroxypropylmethyl cellulose, carboxymethyl cellulose, carageenan, inulin, agarose, polyvinyl alcohol, pullulan, and nucleic acids, wherein said blocking material dissolves upon exposure to an aqueous cell culture medium to expose a surface to which cells can adhere.

2. The cell assay device of claim 1, wherein said cell seeding zones are coated with a coating material comprising protein or polysaccharide.

3. The cell assay device of claim 1, wherein said blocking material is selected from the group consisting of poly(lactic acid), poly[(lactic acid-co-(glycolic acid)], cellulose acetate butyrate polymers, and polyvinyl alcohol.

4. The cell assay device of claim 1, further comprising a non-degradable layer adhered to said blocking material.

5. The cell assay device of claim 1, wherein said blocking material can be modified to allow cell adherence.

6. The cell assay device of claim 1, further comprising a mask configured to interface with said substrate.

7. The cell assay device of claim 6, said mask having a array of apertures therein so that when said mask is placed adjacent to said substrate said one or more cells assay zones is aligned with said array of apertures, wherein a portion of the cell exclusion zone is exposed by the aperture.

8. The cell assay device of claim 1, wherein said multiwell plate is selected from the group consisting of 6, 12, 24, 48, 96, 384 and 1536 well plates.