Process for separating proteins fibrinogen, factor XIII and biological glue from a solubilized plasma fraction and for preparing lyophilised concentrates of said proteins
The invention is related to a process for separating proteins fibrinogen, Factor XIII and biological glue from a solubilized plasma fraction and for preparing freeze-dried concentrates of said proteins comprising the steps of:chromatographic purification comprising the steps of loading an anion exchanger of weak base type with the said solubilized fraction, previously equilibrated with a buffer of a predetermined ionic strength of an alkaline pH, which allows to retain the biological glue, elution of the biological glue by increasing the ionic strength of the said buffer, andseparation of FXIII from fibrinogen by addition to at least one part of the biological glue eluate of at least one chemical agent precipitating the FXIII, and recovery of the resulting purified fibrinogen containing supernatant solution, anddiafiltration of the fibrinogen, biological glue and resolubilized FXIII solutions, followed by a freeze-drying of said solutions.
