IP Library › Granted Patent US 12,280,176
Granted Patent B2
US 12,280,176 · App. 16/482,465 · Granted Apr 22, 2025

Methods and compositions for matrix preparation

Inventor: Sherry L. Voytik-Harbin (Zionsville, IN)
Assignee: GENIPHYS, INC.
A61L27/3633A61L2/0047A61L27/3683C07K14/78
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Quick Facts
Patent No.
US 12,280,176
App. No.
16/482,465
Granted
Apr 22, 2025
Kind
B2
Abstract

The invention relates to methods of preparing matrices, and compositions therefor. In particular, the invention relates to methods of preparing collagen matrices, and compositions therefor, including kits and graft compositions.

Claims (19)

1. A method for preparing a matrix, said method comprising polymerizing oligomeric collagen, using a single mixing step for the polymerization, said method comprising mixing an oligomeric collagen composition with a buffer solution to form a collagen solution wherein the buffer solution comprises a base and less than 00.2 mM MgCl 2 , wherein the buffer and the base are in the same composition when mixed with the oligomeric collagen composition for polymerization of the oligomeric collagen, and wherein the polymerization of the oligomeric collagen in the collagen solution results in formation of the matrix.

2. The method of claim 1 wherein the oligomeric collagen composition, the collagen solution, or the matrix is sterilized by a method selected from the group consisting of exposure to chloroform, viral filtration, sterile filtration, ultraviolet radiation, gamma irradiation, E-beam, and combinations thereof.

3. The method of claim 1 wherein the buffer solution does not comprise MgCl 2 .

4. A method for preparing a collagen matrix, said method comprising polymerizing oligomeric collagen using a single mixing step, wherein said mixing step consists of mixing a solution comprising soluble oligomeric collagen with a buffer solution to form a mixed collagen solution, wherein said buffer solution comprises less than 0.02 mM MgCl 2 , 0.003 M to 0.03 M KH 2 PO 4 , 0.1 M to 0.1 M Na 2 HPO 4 , 0.001 M to 0.04 M KCl, 0.2 M to 3.0 M NaCl, and 0.02 N to 0.2 N NaOH, and wherein said mixing step induces the polymerization of the soluble oligomeric collagen in the mixed collagen solution resulting in the formation of the collagen matrix.

5. The method of claim 4 wherein the solution comprising soluble oligomeric collagen, the mixed collagen solution, or the collagen matrix is sterilized by a method selected from the group consisting of exposure to chloroform, viral filtration, sterile filtration, ultraviolet radiation, gamma irradiation, E-beam, and combinations thereof.

6. The method of claim 2 wherein the oligomeric collagen composition, the collagen solution, and/or the matrix is sterilized using ultraviolet radiation.

7. The method of claim 6 wherein the matrix that results from collagen polymerization maintains a polymerization property relative to a matrix formed from a collagen composition this is not irradiated, a matrix formed from a collagen solution that is not irradiated, or a matrix that is not irradiated.

8. The method of claim 7 wherein the polymerization property is selected from shear storage modulus and an in vivo tissue response.

9. The method of claim 6 wherein the radiation dose ranges from about 30 mJ/cm 2 to about 300 mJ/cm 2 .

10. The method of claim 6 wherein the sterilization inactivates viruses.

11. The method of claim 5 wherein the solution comprising soluble oligomeric collagen, the mixed collagen solution, and/or the collagen matrix is sterilized using ultraviolet radiation.

12. The method of claim 11 wherein the collagen matrix that results from collagen polymerization maintains a polymerization property relative to a collagen matrix that results from a solution comprising soluble oligomeric collagen that is not irradiated, a collagen matrix that results from a mixed collagen solution that is not irradiated, or a collagen matrix that is not irradiated.

13. The method of claim 12 wherein the polymerization property is selected from shear storage modulus and an in vivo tissue response.

14. The method of claim 11 wherein the radiation dose ranges from about 30 mJ/cm 2 to about 300 mJ/cm 2 .

15. The method of claim 11 wherein the sterilization inactivates viruses.

16. The method of claim 1 wherein the base is NaOH.

17. The method of claim 16 wherein the buffer solution comprises about 0.02 N to about 0.2 N NaOH.

18. The method of claim 1 wherein the collagen solution maintains polymerization capacity relative to oligomeric collagen polymerized using a multi-step procedure.

19. The method of claim 4 wherein the solution comprising soluble oligomeric collagen maintains polymerization capacity relative to oligomeric collagen polymerized using a multi-step procedure.

Assignments (1)
CHANGE OF NAME Recorded Feb 22, 2022
From: GENIPHYS, LLC
To: GENIPHYS, INC.
Reel/Frame 059234/0244 →
Continuity (2)
Provisional Application 62452564 · Jan 31, 2017
Related Publication 20200246507A1 · Aug 6, 2020
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