Proteomics as a tool for optimization of human plasma protein separation

Area of Science:

• Biochemistry
• Analytical Chemistry
• Biotechnology

Background:

• Proteomics applications in protein purification and therapeutic characterization are emerging.
• The impact of proteomics on plasma fractionation and final product analysis remains underexplored.

Purpose of the Study:

• To demonstrate the utility of proteomic techniques for monitoring the initial step of plasma fractionation using anion-exchange chromatography.
• To identify therapeutic proteins and potentially harmful components during plasma processing.

Main Methods:

• Anion-exchange chromatography was employed for plasma fractionation.
• Liquid chromatography-electrospray ionization tandem mass spectrometry (LC-ESI-MS/MS) was used for protein identification in eluted fractions.

Main Results:

• Proteomic analysis successfully monitored the anion-exchange chromatography step.
• Key therapeutic proteins (clotting factors, protein C, protein S, inter-alpha inhibitor proteins) and contaminants were identified.
• The method facilitated the identification of both target therapeutic molecules and potentially harmful substances.

Conclusions:

• Proteomics provides valuable insights into plasma fractionation processes.
• This approach aids in process optimization, rapid identification of low-abundance proteins, and strategic design for purification or removal steps.