Assessment of the impact of solvent/detergent treatment on the quality and potency of a whole IgG equine antivenom

Álvaro Segura, Guillermo León, Chen Yao Su, José María Gutiérrez, Thierry Burnouf

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

We have evaluated for the first time the impact of a solvent/detergent (S/D) treatment on the quality and in vivo neutralization potency of horse-derived whole IgG antivenom used in the treatment of viperid snake bite envenoming in Central America. The S/D treatment by 1% tri (n-butyl) phosphate (TnBP) - 1% Triton X-45 at 22-25 °C was applied either on starting plasma or on purified immunoglobulins. The S/D agents were removed from both fractions by extractions with oil. S/D-treated plasma was subjected to caprylic acid precipitation to purify the immunoglobulins. Products were formulated, sterile-filtered, and filled into 10-mL vials, stored at 5 ± 3 °C, and subjected to routine quality controls, SDS-PAGE, determination of anti-Bothrops asper venom antibody titre by ELISA, in vivo B. asper venom-neutralization potency tests, and safety test, comparatively with an antivenom manufactured by caprylic acid fractionation without S/D treatment. Results indicate that these conditions of S/D treatment on purified immunoglobulin yielded an antivenom of high turbidity that induced weight loss in animals. In contrast, antivenom fractionated from the S/D-treated plasma had physico-chemical and biological characteristics indistinguishable from those of the non-S/D-treated antivenom. S/D treatment of horse plasma may be considered to increase the viral safety of antivenoms.

Original languageEnglish
Pages (from-to)306-312
Number of pages7
JournalBiologicals
Volume37
Issue number5
DOIs
Publication statusPublished - Oct 2009

Keywords

  • Antivenom
  • Neutralization
  • Snake bite envenoming
  • Solvent/detergent
  • Viral inactivation

ASJC Scopus subject areas

  • Biotechnology
  • Applied Microbiology and Biotechnology
  • Bioengineering
  • Immunology and Microbiology(all)
  • Pharmacology

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