Kedrion S.p.a.

Ilaria Nardini

Claudio Farina

Filippo Mori

Claudia Nardini

Pierangelo Giovacchini

Paola Rossi

There is described a chromatographic purification process that allows highly purified von Willebrand factor (vWF) and Fibronectin (Fn) to be obtained, starting from a biological fraction enriched in vWF and Fn and easily scaled up to industrial level. Chromatographic purification was obtained by a strong anionic exchange resin. The concentrates obtained have a high specific activity and, given the low content of contaminant proteins, are particularly suitable for therapeutic use.

Process for highly selective purification of two plasma proteins: von willebrand factor (vWF) and fibronectin (Fn)

The present invention provides a process for purifying FV starting from human plasma or a fractionation intermediate thereof, that is simple, scalable to the industrial level and relatively inexpensive compared to the methods described in the literature to date. The invention consists of the use of two anion exchange chromatography steps, the first of which has the purpose of separating the FV from the PTC component factors, while the second has the purpose of isolating the protein of interest from the majority of plasma proteins by means of selective interaction with the weak anion exchange support used. The process developed has also had a viral inactivation step and a viral removal step included, contributing to the safety of the final product obtained, without however significantly altering the process total recovery of FV, and without necessitating the introduction of additional steps for eliminating the inactivating agents used, thanks to the order in which the various steps are conducted. The process described in the present invention also enables an FV concentrate to be obtained that is stable once frozen at &#x2212;20&#xb0; C.

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Barga, Italy

Ilaria Nardini