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The Use of a Resin Bound Monoclonal Antibody in the Purification of Various Components in Anthrax Vaccines

Burnett,Joseph W ; Calton,Gary J

1985

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  • Título:
    The Use of a Resin Bound Monoclonal Antibody in the Purification of Various Components in Anthrax Vaccines
  • Autor: Burnett,Joseph W ; Calton,Gary J
  • Assuntos: ABSORPTION ; ANTHRAX ; ANTIBODIES ; AS871 ; BUFFERS ; CHROMATOGRAPHY ; CYCLES ; DISSOCIATION ; FREEZING ; IMMUNOLOGY ; LETHALITY ; MIGRATION ; PE62770A ; PH FACTOR ; Pharmacology ; POLYMERS ; PURIFICATION ; REVERSIBLE ; SODIUM ; THAWING ; THIOCYANATES ; VACCINES ; WU352
  • Notas: DTIC AND NTIS
  • Descrição: Lethal factor from B. anthracis (Vollum 1B strain) has been purified 1130 fold by immunosorbent chromatography using a mouse anti-lethal factor monoclonal antibody Sepharose-4B column. The antibody and was eluted with buffer containing 4 M NaSCN with 77% recovery of the immunological activity. Pre-elution with 4 M NaCl was found to be effective in eluting non-biospecifically bound proteins. Migration of lethal factor in SDS-polyacrylamide gel electrophoresis indicated a single component with a molecular weight of 82,000. The effect of a number of dissociation buffers on the antigen-antibody complex has been investigated. Sodium thiocyanate (4M) in 0.05 M sodium phosphate buffer, pH 7, was the most effective eluting solution causing complete dissociation of the antigen-antibody complex while 4 M NaI and 4 M NaCl caused 93% and 15% dissociation respectively. The antigen-antibody complex was found to undergo a reversible dissociation at moderately high pH values. The ionizable group (s) responsible for this dissociation exhibited a pK sub a value of 9.90. Purified lethal factor exhibited a significant decrease in immunological activity upon freeze-thawing with 52% loss in potency observed after three freeze-thaw cycles.
  • Data de criação/publicação: 1985
  • Idioma: Inglês

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