Chen SX, Hammond DJ, Klos AM, Wood WD, Wydick JE, Lebing WR. Chromatographic purification of human alpha 1 proteinase inhibitor from dissolved Cohn fraction IV-1 paste.
J Chromatogr A 1998;
800:207-18. [PMID:
9561763 DOI:
10.1016/s0021-9673(97)01119-9]
[Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
A novel chromatographic process for purification of alpha 1 proteinase inhibitor (alpha 1-PI) from Cohn fraction IV-1 paste is described. This process has been successfully scaled up to 50-1 columns. It involves DEAE chromatography, sulfopropyl (S) cation chromatography, tri-n-butyl phosphate (TNBP)-cholate treatment, a second S cation chromatography, freeze-drying and dry-heat. The process has been optimized for purity, yield, lipid removal, chemical usage and water consumption. Filtration after TNBP-cholate treatment plays a key role in ensuring a low lipid content in the final product. Pre-equilibration with high salt buffer is necessary to reduce the water consumption significantly during the ion-exchange chromatography equilibration step. The final product is approximately 95% pure by sodium dodecyl sulfate-polyacrylamide gel electrophoresis, with a 64% to 70% yield from IV-1 paste.
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