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Efficacy of amphotericin B lipid complex in a rabbit model of coccidioidal meningitis

Javier Capilla1, Karl V Clemons, Raymond A Sobel

  • 1California Institute for Medical Research, San Jose, CA, USA.

The Journal of Antimicrobial Chemotherapy
|July 25, 2007
PubMed
Abstract

Insights

Intravenous amphotericin B lipid complex (ABLC) effectively treated fungal meningitis in rabbits. ABLC demonstrated superior efficacy over fluconazole in reducing fungal burden and improving survival in this coccidioidal meningitis model.

Area of Science:

  • Mycology
  • Infectious Diseases
  • Pharmacology

Background:

  • Coccidioidal meningitis (CM) is a severe fungal infection of the central nervous system.
  • Effective treatment options for CM are limited, necessitating the evaluation of novel therapeutic strategies.
  • Rabbit models provide a valuable platform for assessing the efficacy of antifungal agents against CM.

Purpose of the Study:

  • To compare the efficacy of intravenous amphotericin B lipid complex (ABLC), deoxycholate amphotericin B (dAMB), and oral fluconazole in a rabbit model of coccidioidal meningitis (CM).

Main Methods:

  • Rabbits were intracisternally infected with Coccidioides immitis.
  • Treatment groups received intravenous ABLC, dAMB, oral fluconazole, or diluent (D5W).
  • Survival, fungal burden (cfu) in CNS tissues and CSF, and histological changes were assessed. Serum and tissue amphotericin B (AMB) concentrations were determined.

Main Results:

  • All treatments prolonged survival compared to controls.
  • ABLC and dAMB significantly reduced fungal burden in CNS tissues more effectively than fluconazole.
  • ABLC demonstrated faster clearance of fungi from CSF and reduced the severity of meningitis histologically compared to fluconazole.

Conclusions:

  • Intravenous ABLC is an efficacious treatment for experimental coccidioidal meningitis.
  • ABLC represents a promising therapeutic option for CM, offering potential advantages over existing treatments.

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