Acellular soft tissue-derived matrices and methods for preparing same
Compositions including a first soft tissue-derived matrix and a second soft tissue-derived matrix are provided, as well as methods of making such compositions. In some embodiments, the composition comprises delipidated, decellularized adipose tissue-derived matrix and delipidated, decellularized fascial tissue-derived matrix, which may be combined in various proportions. Such adipose-fascia matrix compositions provide improved volume retention when implanted into a patient. The composition may further include exogenous cells or other substances, and/or a carrier. The composition is suitable for use inplastic surgery procedures, including reconstructive or cosmetic surgery procedures, as well as procedures for wound treatment and tissue regeneration. The methods for making the compositions may involve separation of first and second soft tissues from one another, followed by performing one or more treatments on the separated soft tissues, then combining the treated soft tissues and, optionally, performing one or more additional treatments on the combined soft tissues.
1. A composition, comprising an adipose component which is a delipidized, decellularized adipose tissue-derived matrix and a fascia component which is a decellularized fascial tissue-derived matrix, wherein the adipose component and fascia component are present in the composition in a predetermined ratio of adipose component:fascia component in a range of from about 99:1 to about 1:99 on a weight basis, whereby the composition provides greater volume retention at an implantation site after passage of a minimum period of time from implantation of the composition in a subject, wherein greater volume retention is greater compared to a composition having a predetermined ratio of 100:0.
2. The composition of claim 1 wherein the fascial tissue-derived matrix is also delipidized.
3. The composition of claim 1 , wherein the predetermined ratio is at least about 4:1.
4. The composition of claim 1 , wherein the predetermined ratio is at least about 1.1.
5. The composition of claim 1 , wherein the minimum time period after implantation is at least 3 weeks.
6. The composition of claim 1 , wherein the minimum time period after implantation is at least 12 weeks.
7. The composition of claim 1 , wherein the minimum time period after implantation is at least 6 months.
8. The composition of claim 1 , wherein said adipose component is essentially free of native nucleic acids, or said fascia component is essentially free of native nucleic acids, or both.
9. The composition of claim 1 , wherein one or both of the adipose and fascia components has been disinfected.
10. The composition of claim 1 , further having a water content of at least about 20%, by weight, based on the total weight of the composition, and wherein the composition is ready to use without requiring rehydration.
11. The composition of claim 1 , further having a water content of less than about 20%, by weight, based on the total weight of the composition, wherein the composition is in substantially dried particulate form.
12. The composition of claim 1 , further comprising exogenous tissuegenic cells.
13. The composition of claim 1 , further comprising at least one exogenous growth inductive substance.
14. The composition of claim 1 , further comprising a carrier.
15. The composition of claim 14 , wherein said carrier comprises at least one substance selected from the group consisting of: an isotonic solution, a sodium chloride solution, a lactated Ringer's solution, a phosphate-buffered saline solution, platelet rich plasma, hyaluronic acid and its derivatives, thrombin, fibrin, glycerin, collagen, lecithin, sugars, polysaccharides, and solutions thereof.
16. The composition of claim 15 , wherein the carrier comprises hyaluronic acid or its derivative.
17. The composition of claim 1 , further comprising a preservative.
18. The composition of claim 17 , wherein the preservative is a solution comprising: a salt, a buffer, a sugar, a vitamin, an alcohol, a hormone, an antioxidant, sodium benzoate, or combinations thereof.
19. The composition of claim 18 , wherein the preservative is a solution comprising hyaluronic acid or its derivative.
20. The composition of claim 1 , wherein in the composition has a final form selected from: particulate, pieces, chunks, a paste, a gel, a slurry, a suspension, a layer or coating deposited on another scaffold, and combinations thereof.
21. The composition of claim 1 , wherein the composition is provided in a pre-determined shape.
22. The composition of claim 21 , wherein the pre-determined shape is one or more shapes selected from: a block, a sheet, a polyhedron, a strip, a cylinder, a rod, a sphere, a cone, a pyramid, a film, a membrane, a block, a polyhedron, a strip, a cylinder, a rod, a sphere, a cone, a pyramid, and variations and combinations thereof.
23. An implant comprising the composition of claim 1 .