Process for the preparation of new organ transplants
US4383832A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 1, 1982 |
| Grant date | May 17, 1983 |
| Priority date | — |
| Expiry date | Jul 1, 2002 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61L2430/40
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The organ transplants are intended to be used as a replacement (prostheses) for organs or parts of organs, for examples arteries or veins, which have undergone pathological change or are functionally impaired. The organs, which are taken from a fish, bird or higher mammal, are subjected to crosslinking of the amino groups and of the alcoholic hydroxyl groups of the peptide chains of the intercellular matix by means of a di-, tri- or poly-carboxylic acid. It is advantageous subsequently to treat the crosslinked product with a dialdehyde, in order to bind amino groups which have not reacted, or to free the crosslinked product from material which potentially may act as an antigen, by hydrolysis with ficin, papain or a protease having a smaller action. After the hydrolysis, a comprehensive crosslinking is appropriately ensured using a dialdehyde or a di-, tri- or poly-carboxylic acid. The resulting prostheses are distinguished by chemical stability, biophysical and biochemical properties similar to those of the natural material and the absence of rejection reactions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.