Engineered skin equivalent, method of manufacture thereof and products derived therefrom

Patent metadata

Field	Value
Publication number	US-10273549-B2
Application number	US-201715493083-A
Country	US
Kind code	B2
Filing date	Apr 20, 2017
Priority date	Apr 21, 2016
Publication date	Apr 30, 2019
Grant date	Apr 30, 2019

Abstract

Disclosed herein are synthetic leathers, artificial epidermal layers, artificial dermal layers, layered structures, products produced therefrom and methods of producing the same.

First claim

What is claimed is:

1. A method of making a synthetic leather comprising:
(a) forming an artificial dermal layer comprising a fibroblast; and
(b) tanning at least a portion of said artificial dermal layer, thereby forming said synthetic leather, wherein said fibroblast is differentiated from an induced pluripotent stem cell.

2. The method of claim 1 , further comprising forming an artificial epidermal layer.

3. The method of claim 2 , wherein said artificial epidermal layer comprises a keratinocyte.

4. The method of claim 3 , further comprising placing said artificial epidermal layer upon said artificial dermal layer thereby forming a layered structure.

5. The method of claim 3 , wherein said keratinocyte is differentiated from an induced pluripotent stem cell.

6. The method of claim 4 , wherein said layered structure further comprises a melanocyte.

7. The method of claim 6 , wherein said melanocyte is differentiated from an induced pluripotent stem cell.

8. The method of claim 4 , wherein said artificial epidermal layer, said layered structure or said artificial dermal layer further comprises collagen.

9. The method of claim 8 , wherein said collagen is produced at least in part by a collagen producing cell, is separately added, or any combination thereof.

10. The method of claim 1 , wherein said synthetic leather further comprises one or more of keratin, elastin, gelatin, proteoglycan, dermatan sulfate proteoglycan, glycosoaminoglycan, fibronectin, laminin, dermatopontin, lipid, fatty acid, carbohydrate, or a combination thereof.

11. The method of claim 1 , wherein a thickness of said artificial dermal layer ranges from about 0.02 mm to about 5 mm.

12. The method of claim 2 , wherein a thickness of said artificial epidermal layer ranges from about 0.01 mm to about 2 mm.

13. The method of claim 2 , wherein said synthetic leather further comprises a basement membrane substitute.

14. The method of claim 13 , wherein said basement membrane substitute is between said artificial epidermal layer and said artificial dermal layer.

15. The method of claim 1 , wherein tanning comprises treating said at least a portion of said artificial dermal layer with sulfuric acid, chromium or a tanning liquor.

16. A tanned synthetic leather, which prior to tanning comprises:
a layered structure comprising:
an artificial dermal layer comprising a fibroblast and
an artificial epidermal layer comprising a keratinocyte,
wherein said fibroblast or said keratinocyte is differentiated from an induced pluripotent stem cell.

17. The tanned synthetic leather of claim 16 , wherein said keratinocyte is differentiated from an induced pluripotent stem cell.

18. The tanned synthetic leather of claim 16 , wherein said layered structure further comprises a melanocyte.

19. The tanned synthetic leather of claim 16 , wherein said fibroblast is differentiated from an induced pluripotent stem cell.

20. The tanned synthetic leather of claim 16 , wherein said artificial epidermal layer or said artificial dermal layer further comprises collagen.

21. The tanned synthetic leather of claim 20 , wherein said collagen is produced at least in part by a collagen producing cell, is separately added, or any combination thereof.

22. The tanned synthetic leather of claim 16 , wherein a thickness of said artificial dermal layer ranges from about 0.02 mm to about 5 mm.

23. The tanned synthetic leather of claim 16 , wherein a thickness of said artificial epidermal layer ranges from about 0.01 mm to about 2 mm.

24. The tanned synthetic leather of claim 16 , wherein said synthetic leather further comprises a basement membrane substitute.

25. The tanned synthetic leather of claim 24 , wherein said basement membrane substitute is between said artificial epidermal layer and said artificial dermal layer.

26. The tanned synthetic leather of claim 25 , comprised in one or more of a watch strap, a belt, a packaging, a shoe, a boot, a footwear, a glove, a clothing, a luggage, a bag, a clutch, a purse, a backpack, a wallet, a saddle, a harness or a whip.

27. The tanned synthetic leather of claim 26 , comprised in a watch strap.

28. The tanned synthetic leather of claim 26 , comprised in a belt.

29. The tanned synthetic leather of claim 26 , comprised in a bag.

30. An artificial epidermal layer comprising:
a hair follicle cell and a melanocyte, wherein said melanocyte is differentiated from an induced pluripotent stem cell.

31. The artificial epidermal layer of claim 30 , wherein said hair follicle cell comprises a dermal papilla cell, an outer root sheath cell, or a combination thereof.

32. The artificial epidermal layer of claim 30 , wherein said artificial epidermal layer further comprises a keratinocyte.

33. The artificial epidermal layer of claim 32 , wherein said keratinocyte is differentiated from an induced pluripotent stem cell.

34. The artificial epidermal layer of claim 30 , further comprising a hair follicle.

Assignees

• Vitrolabs Inc
• King S College London

Inventors

• Helgason Ingvar
• Ilic Dusko

Classifications

• C12N2533/30

  Synthetic polymers · CPC title

• C14C3/02 Primary

  Chemical tanning · CPC title

• C12N5/0629 Primary

  Keratinocytes; Whole skin · CPC title

• C12N2502/091

  melanocytes · CPC title

• C12N5/0698 Primary

  Skin equivalents · CPC title