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EP0637450A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Composition for revitalizing scar tissue

Assignee: Collagen Aesthetics Inc
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Filing: 1993-08-09
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Granted: —
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Expires: 2013-08-09
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Abstract

Abstract In accordance with the present invention, a method is disclosed for the remediation of scar tissue in a human or an animal by introducing into the scar tissue or into tissue adjacent the scar tissue a remedial composition comprising a bioactive material selected from naturally occurring growth factors, synthetic growth factors, active peptide segments of naturally occurring and synthetic growth factors, and mixtures thereof. Typically the remedial composition includes a biodegradable or non-biodegradable support matrix material to provide for timed release of the bioactive material. Preferably, the support matrix material is biodegradable and is selected from the group consisting of collagen, glycosaminoglycan, gelatin, albumin, hyaluronic acid, heparin, oxidized cellulose, dextran, polyglycolic acid, polylactic acid, polyanhydride and mixtures thereof. Most scar tissue, particularly in human beings, is very dense and is difficult for the remedial composition described above to penetrate. To render the scar tissue less dense and to spatially expand the scar tissue fibrils, it is preferable to introduce into the scar tissue a softening, expanding composition as well as the remedial composition containing the bioactive material. The softening, expanding composition can be introduced simultaneously with introduction of the remedial composition; however, it is preferable that the softening, expanding composition be introduced prior to the remedial composition. A preferred softening, expanding composition includes at least one dried collagen-comprising polymer, at least one polymer hydrogel and a non-aqueous liquid carrier material.

Inventors

  • 👤 Richard A. Berg
  • 👤 Woonza Min Rhee

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-23 18:52
CPC Classifications
A; A61; A61L; A61L26/00; A61L26/0061; A61L26/0066; A61K; A61K31/00; A61K31/045; A61K31/07; A61K31/557; A61K31/70; A61K31/715; A61K35/00; A61K35/12; A61K35/14; A61K35/19; A61K38/00; A61K38/16; A61K38/17; A61K38/18; A61K38/1825; A61K38/39; A61K38/43; A61K38/46; A61K38/48; A61K38/4886; A61K47/00; A61K47/30; A61K47/36; A61K47/42; A61L26/0009; A61L26/0028; A61L26/0047; A61P; A61P43/00; A61L2300/00; A61L2300/40; A61L2300/412; A61L2300/414; A61L2300/60; A61L2300/602

Claims Analysis

Total Claims: 12
Claim 1
Independent Claim 41 words
A composition for scar tissue remediation in a human or animal, comprising a bioactive material selected from the group consisting of naturally occurring growth factors, synthetic growth factors, active peptide segments of naturally occurring and synthetic growth factors and mixtures thereof.
Claim 2
Dependent Claim 55 words
The composition of Claim 1, wherein said bioactive material is selected from the group consisting of: insulin-like growth factor, platelet-derived growth factor, transforming growth factor beta, transforming growth factor alpha; fibronectin; Type IV collagen; laminin, tenascin; hyaluronic acid; prostaglandin E; retinols, retinoic acid; ascorbates; estrogen; Protease Nexin I; hirudin; chitin; chitosan; and soluble receptor TGF-p.
Claim 3
Dependent Claim 29 words
The composition of Claim 1, wherein said bioactive material is a growth factor derived from a platelet extract wherein platelets are obtained from said human or animal using plateletpheresis.
Claim 4
Dependent Claim 30 words
The composition of Claim 1, wherein said bioactive material is a growth factor derived from a platelet extract wherein platelets are obtained from a human or an animal using plateletpheresis.
Claim 5
Dependent Claim 42 words
The composition of any one of the preceding Claims, wherein said remedial composition includes a pharmaceutically acceptable controlled release matrix selected from the group consisting of collagen, glycosaminoglycan, gelatin, albumin, hyaluronic acid, heparin, oxidized cellulose, dextran, polyglycolic acid, polylactic acid and polyanhydride.
Claim 6
Dependent Claim 36 words
The composition of Claim 5, wherein the concentration of said bioactive material ranges from about 0.001 % to about 35 % by weight based on the combined weight of said bioactive material and said matrix material.
Claim 7
Dependent Claim 33 words
A composition useful for softening and expanding scar tissue, comprising a dried collagen capable of expanding upon contact with bodily fluids, whereby fibrils of said scar tissue are separated spacially from each other.
Claim 8
Dependent Claim 38 words
The composition of any one of the preceding Claims, wherein a liquid carrier material is present at a concentration ranging from about 75 % to about 99.999 % by weight, based on the total weight of the composition.
Claim 9
Dependent Claim 61 words
A composition useful for softening and expanding scar tissue, selected from the group consisting of: a composition comprising at least one dried collagen-comprising polymeric hydrogel and a liquid carrier material; a composition comprising at least one glycosaminoglycan-comprising polymeric hydrogel and a liquid carrier material; a composition comprising at least one enzyme capable of degradation of connective tissue components; and mixutures thereof.
Claim 10
Dependent Claim 29 words
The composition of Claim 8, wherein said liquid carrier is present at a concentration ranging from about 75 % to about 99.999 % by weight of the total composition.
Claim 11
Dependent Claim 38 words
The composition of any one of Claims 8 to 10, wherein said liquid carrier material is selected from the group consisting of glycerol, lecithin, vegetable oils, fatty acids, and long chain alcohols having at least 3 carbon atoms.
Claim 12
Dependent Claim 72 words
A composition of matter which is useful in scar tissue remediation in a human or animal, said composition comprising: (a) a bioactive material selected from naturally occurring growth factors, synthetic growth factors, active peptide segments of naturally occurring and synthetic growth factors and mixtures thereof, and (b) a dried collagen-comprising polymeric hydrogel capable of expanding upon contact with bodily fluids, whereby fibrils of said scar tissue are separated spacially from each other.

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