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Two step procedure for purification of enzymatically active prostate-specific antigen from seminal plasma

  • B. Bindukumar
  • , Elzbieta Kawinski
  • , Craig Cherrin
  • , Leah M. Gambino
  • , Madhavan P.N. Nair
  • , Stanley A. Schwartz
  • , Kailash C. Chadha
  • Roswell Park Cancer Institute
  • State University of New York (SUNY)

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

The role of prostate-specific antigen (PSA) during the onset of prostate cancer and subsequent tumor growth and metastasis is not well understood. We have developed a simple two step procedure, based on principles of hydrophobic charge-induction chromatography and molecular size chromatography to provide pure free-PSA (f-PSA) preparation that is free from all other known PSA complexes as well as human kallikrein 2 (hK2). The overall recovery of f-PSA is 72%. The isolated f-PSA consists of three known isoforms that corresponds to pI of 6.2, 6.4 and 7.2. f-PSA is enzymatically active and its enzymatic activity can be effectively neutralized by a serine protease inhibitor.

Original languageEnglish
Pages (from-to)113-120
Number of pages8
JournalJournal of Chromatography B: Analytical Technologies in the Biomedical and Life Sciences
Volume813
Issue number1-2
DOIs
StatePublished - Dec 25 2004

Keywords

  • PSA
  • PSA purification
  • Prostate cancer
  • Prostate-specific antigen
  • Serine protease
  • Thiophilic-interaction chromatography

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