摘要:
Artificial human skin is disclosed which is based on: (a) a microperforated membrane based on a hyaluronic acid derivative on which keratinocytes have been seeded and cultured; (b) an underlying non-woven tissue based on a hyaluronic acid derivative wherein fibroblasts have been seeded and left to proliferate.The artificial human skin may be used in medical, surgical, diagnostic and controlled release drug delivery applications. The artificial human skin may be safely frozen to -80.degree. C. or stored in liquid nitrogen in order to have a skin tissue bank.
摘要:
A biological material for the repair of connective tissue cells comprising: a) a cell preparation enriched in mesenchymal stem cells, b) three-dimensional extracellular matrix comprising a nyaluronic acid derivative. The use of said biological material, optionally combined with therapeutically acceptable excipients and/or diluents and optionally in association with therapeutically effective ingredients in the repair of connective tissue cells.
摘要:
Tubular structure, whose wall has an unbroken surface consisting essentially of at least one HA derivative and optionally a further polymer of natural, synthetic or semisynthetic origin. Said tubular structure, which is prepared with a very simple process, is used for the preparation of vascular and urethral grafts.
摘要:
The present invention relates to a biological material having a matrix which contains at least one derivative of hyaluronic acid on which endothelial cells, glandular cells such as islets of Langerhans and liver cells, skin adnexa, germinative cells of hair bulbs, and kerinatocytes are grown, optionally in presence of a medium treated with fibroblasts or in a co-culture with fibroblasts. A process for the production of said biologic materials and the use of such materials for human and veterinary applications such as cardiovascular and oncological surgery, in connection with transplants, for enhancing the biological process of tissue vascularization and for aesthetic use, and also for the screening of medicaments or toxic substances and as a support in the process of gene transfection. The biological material is based on an efficacious cell culture and a biocompatible and biodegradable three-dimensional matrix containing a hyaluronic acid derivative.
摘要:
A biological material comprising two components is provided containing a first component comprising alternatively (1) a culture of autologous or homologous bone marrow stem cells partially or completely differentiated into specific connective tissue cellular lines or (2) a sole extracellular matrix free from any cellular component secreted by the specific connective tissue cellular lines; and a second component containing a three-dimensional biocompatible and biodegradable matrix consisting of a hyaluronic acid ester having a degree of esterification comprised between 25 and 100%. The specific tissue cell lines are selected from fibroblasts, osteoblasts, myoblasts, adipocytes, chondrocytes and endothelial cells. The biological material is suitable for use as a dermal substitute in cutaneous lesions as well as repairing damaged connective tissue.