The 'cured' immune phenotype achieved by treatment of visceral leishmaniasis in the BALB/c mouse with non ionic surfactant vesicular sodium stibogluconate, does not protect against re-infection.

K. C. Carter, A. J. Baillie, A. B. Mullen

Research output: Contribution to journalArticle

Abstract

Single-dose treatment with sodium stibogluconate solution (SSG) and treatment with a nonionic surfactant vesicular formulation of sodium stibogluconate (SSG-NIV) were compared for the ability to protect BALB/c mice against infection with Leishmania donovani. Prophylactic treatment with SSG-NIV protected against infection, although its effects were time and organ dependent; protection was not obtained with SSG. Protection against reinfection with L. donovani was observed only in mice cured by treatment with SSG-NIV. However, this protective effect was probably due to the presence of residual drug rather than an immune effect, since prophylactic SSG-NIV treatment gave similar results. Transfer of enriched spleen T-cell populations from L. donovani-infected mice or from infected SSG-NIV-treated mice gave no protection against L. donovani infection in the recipients. T cells from infected mice, but not from infected SSG-NIV-treated mice, were infectious to recipients. SSG-NIV treatment was equally effective against visceral leishmaniasis in immunocompetent and SCID mice, whereas SSG treatment was less effective in the latter. The results of this study suggest that the high antileishmanial activity of SSG-NIV is due to favorable modification of SSG delivery and does not require a fully functional immune response. Cure of visceral leishmaniasis by SSG-NIV treatment in the BALB/c mouse did not protect against reinfection.
Original languageEnglish
Pages (from-to)61-65
Number of pages5
JournalClinical Diagnostic Laboratory Immunology
Volume6
Issue number1
Publication statusPublished - 1 Jan 1999

Keywords

  • visceral leishmaniasis
  • sodium stibogluconate

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