Assembled scaffolds for three dimensional cell culturing and tissue generation

• US 6,143,293 A
• Filed: 03/26/1998
• Issued: 11/07/2000
• Est. Priority Date: 03/26/1998
• Status: Expired due to Term

• Current Assignee: Lifecell Corporation (Abbvie Incorporated)
• Original Assignee: Carnegie Mellon University, University Of Pittsburgh (University of Pittsburgh of The Commonwealth System of Higher Education)
• Inventors: Calvert, Jay Wynn, Weiss, Lee E.
• Primary Examiner(s): Naff, David M.
• Application Number:
  US09/048,944
• Time in Patent Office: 957 Days
• Field of Search: 435/174, 435/176, 435/177, 435/180, 435/182, 435/395, 435/396, 435/397, 435/398, 435/401, 435/402, 424/93.7, 424/423, 424/520
• US Class Current: 424/93.7
• CPC Class Codes: A61F 2/0059 Cosmetic or alloplastic implants A61F2/10 - A61F2/16, A61F2/28 take precedence
• CPC Class Codes: A61F 2/022 Artificial gland structures using bioreactors hemodialysis A61M1/16; hemofiltration A61M1/34; other extracorporeal blood treatment A61M1/36
• CPC Class Codes: A61K 35/12 Materials from mammals; Compositions comprising non-specified tissues or cells; Compositions comprising non-embryonic stem cells; Genetically modified cells vaccines or medicinal preparations containing antigens or antibodies A61K39/00
• CPC Class Codes: A61L 2430/22 for reconstruction of hollow organs, e.g. bladder, esophagus, urether, uterus
• CPC Class Codes: A61L 27/18 obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
• CPC Class Codes: A61L 27/3625 Vascular tissue, e.g. heart valves
• CPC Class Codes: A61L 27/38 containing added animal cells organs or tissue containing native cells A61L27/36
• CPC Class Codes: C08L 67/04 Polyesters derived from hydroxycarboxylic acids, e.g. lactones C08L67/06 takes precedence
• CPC Class Codes: C12N 5/0062 General methods for three-dimensional culture

Abstract

A three-dimensional scaffold for tissue generation. Mechanical fasteners allow layered and volumetric scaffold sections, which may be pre-seeded with cells and/or growth factors, to be assembled into a heterogeneous generated tissue for implantation.

Claims

1. A three dimensional multilayer scaffold for supporting cell growth comprising:

a first layer for supporting cell growth; and

a second layer for supporting cell growth, said first and second layers being mechanically fastened together.

2. The three dimensional multilayer scaffold of claim 1, wherein said first and second layers are mechanically fastened together by a mechanical fastener selected from the group consisting of screws, pins, sutures, staples, wires, string and combinations thereof.

3. The three dimensional multilayer scaffold of claim 2, wherein said mechanical fastener is bioabsorbable.

4. The three dimensional multilayer scaffold of claim 1, wherein said first layer includes a channel.

5. The three dimensional multilayer scaffold of claim 1, wherein each of said layers includes an alignment indentation on one surface thereof and an alignment protrusion on an opposing surface thereof, the alignment indentations shaped to mate with the alignment protrusions for facile alignment of said layers.

6. The three dimensional multilayer scaffold of claim 1, wherein said first layer is seeded with a component selected from the group consisting of living cells, bone marrow cells, osteoblasts, mesenchymal stem cells, satellite cells, fibroblasts, and growth factors.

7. The three dimensional multilayer scaffold of claim 6, wherein said second layer is seeded with a component selected from the group consisting of living cells, bone marrow cells, osteoblasts, mesenchymal stem cells, satellite cells, fibroblasts, and growth factors.

8. The three dimensional multilayer scaffold of claim 1, wherein said first and second layers are subdivided into zones of support for a pre-selected component.

9. The three dimensional multilayer scaffold of claim 8, wherein said zones of support for a pre-selected component define three dimensional heterogeneous regions in the three dimensional multilayer scaffold.

10. The three dimensional multilayer scaffold of claim 1, further including a blood vessel embedded therein.

11. The three dimensional multilayer scaffold of claim 10, further including a barbed halo positioned around said blood vessel'"'"'s outer surface.

12. A method of forming a three dimensional multilayer scaffold comprising:

seeding a first prefabricated element with a component selected from the group consisting of living cells, bone marrow cells, osteoblasts, mesenchymal stem cells, satellite cells, fibroblasts, and growth factors;

seeding a second prefabricated element with a component selected from the group consisting of living cells, bone marrow cells, osteoblasts, mesenchymal stem cells, satellite cells, fibroblasts, and growth factors; and

connecting said first and second prefabricated elements together in a manner that ensures viability of said cellular components.

13. The method of claim 12, wherein a mechanical fastener connects said first and second prefabricated elements.

14. A method of treating a patient comprising:

constructing a three dimensional scaffold to support cell growth, said three dimensional scaffold including a first layer for supporting cell growth, and a second layer for supporting cell growth, said first and second layers being mechanically connected to each other; and

implanting said three dimensional scaffold in the patient.

15. The method of claim 14, wherein said first layer is pre-seeded with a cellular component selected from the group consisting of bone marrow cells, osteoblasts, mesenchymal stem cells, satellite cells, fibroblasts, and growth factors.

16. The method of claim 15, wherein said second layer is pre-seeded with a cellular component selected from the group consisting of bone marrow cells, osteoblasts, mesenchymal stem cells, satellite cells, fibroblasts, and growth factors.

17. The method of claim 14, wherein said three dimensional scaffold further includes a plurality of other layers mechanically connected to said first and second layers.

18. The method of claim 14, further including the step of embedding a vessel in said three dimensional scaffold.

19. The method of claim 18, further including the step of connecting the vessel to an existing vessel.