Native analysis of plasma-derived clotting factor VIII concentrates: "sponge effect" and contaminants

Electrophoresis. 2012 Apr;33(8):1292-8. doi: 10.1002/elps.201100702.


In the present study, we analysed two commercially available plasma-derived FVIII preparations, Beriate and Emoclot, through native gel-based approaches (CN-PAGE). The rationale behind this study was to assess whether protein complexes from plasma resisted the aggressive manufacturing processes. A preliminary analysis of plasma complexes was performed focusing on the molecular weight range between 45 kDa and 1 MDa. As a result, we could evidence in both preparations the presence of complexes, which resisted the cryoprecipitation, chromatographic and heat treatment processing steps. These complexes behaved in a "sponge-effect"-like fashion through the enrichment of otherwise less abundant contaminants. The use of an alternative electrophoretic approach such as CN-PAGE allowed us to confirm 2DE-based observations and expand the list of non-FVIII proteins which contaminate the preparations.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Blood Proteins / analysis*
  • Blood Proteins / chemistry
  • Coagulants / analysis*
  • Coagulants / chemistry
  • Drug Contamination
  • Electrophoresis, Gel, Two-Dimensional
  • Electrophoresis, Polyacrylamide Gel / methods*
  • Factor VIII / analysis*
  • Factor VIII / chemistry
  • Humans
  • Molecular Weight
  • Technology, Pharmaceutical


  • Blood Proteins
  • Coagulants
  • Factor VIII