Compartmental extract compositions for tissue engineering
First Claim
1. A cell free scaffold having a three dimensional structure and a surface suitable for adherence and proliferation of cells and composed of an extract of cells, wherein the extract consists of extracellular components secreted by, and/or intracellular components extracted from, cells isolated and cultured in vitro, and wherein the scaffold is formulated in injectable form or fabricated in transplantable form, and wherein said scaffold is not fabricated by electroprocessing or electrospinning.
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Abstract
The present invention concerns biologically-active cell-free scaffolds composed of extracts of cellular and/or extracellular compartments for use in tissue regeneration. The present invention also contemplates the novel concept of redesigning the biological scaffold by seeding cells thereon followed by cell elimination. Cells are seeded on the scaffold for a period of time during which a dynamic interaction occurs between the scaffold and the seeded cells, resulting in reshaping of the scaffold architecture and integration of newly synthesized matrix elements. Redesigning may improve the physical and biological characteristics of the scaffold, and also improve the matching of the scaffold to treat a specific target tissue or a specific patient, by seeding tissue-specific cells or by seeding cells which are autologous to a patient, respectively.
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Citations
22 Claims
- 1. A cell free scaffold having a three dimensional structure and a surface suitable for adherence and proliferation of cells and composed of an extract of cells, wherein the extract consists of extracellular components secreted by, and/or intracellular components extracted from, cells isolated and cultured in vitro, and wherein the scaffold is formulated in injectable form or fabricated in transplantable form, and wherein said scaffold is not fabricated by electroprocessing or electrospinning.
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12. A method of preparing a cell free scaffold having three dimensional structure and a surface suitable for adherence and proliferation of cells for use in conditions necessitating tissue or organ regeneration, repair or replacement, comprising:
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(a) isolating cells and culturing said cells in vitro; (b) preparing a cell extract, wherein the extract consists of extracellular components secreted by, and/or intracellular components extracted from said cultured cells; and (c) preparing a scaffold from said cell extract, wherein the scaffold is formulated in injectable form or fabricated in transplantable form, and wherein said scaffold is not fabricated by electroprocessing or electro spinning. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification