Placenta collagen preparations, method for their extraction and their use

Abstract

Abstract Human or animal placenta is subjected to a moderate enzymatic digestion, in particular with pepsin at an acid pH, and then, after separation of the residual tissue, the impurities are precipitated at a moderately acid pH, the collagen is precipitated at neutral pH and redissolved and the residual impurities are precipitated at an acid pH. The collagen obtained may be brought back to neutral pH and dried in the form of fibres. Completely transparent, physiological and haemocompatible gels and solutions can be prepared. Uses in contact lenses and in implants.

Inventors

• 👤 Jean-Louis Tayot
• 👤 Michel Tardy

Bibliographic Details