Affinity Purification of Plasma Proteins: Characterization of Six Affinity Matrices and their Application for the Isolation of Human Factor VIII

Abstract

SummaryFor the purification of coagulation factor VIII, (1,1’-carbonyldiimida zole [CDI] -activated) Sepharose CL-48 was functionalized with two aminoalkyl and four aminoalkyl-carbamylalkyl ligand- spacer combinations. The affinity matrices were contacted with human plasma. All affinity matrices showed complete adsorption of factor VIII (>90%) and three aminoalkyl-carbamylalkyl Sepharoses gave factor-VIII recoveries of 50-65% and a factor-VIII preparation with a specific activity of 1–2 U factor VIII/mg of protein. Furthermore, no fibrinogen, immunoglobulin G and albumin could be detected in the isolated factor VIII. Optimal results were obtained using the di-methyl-aminopropyl-carbamylpentyl-Sepharose affinity matrix.