1. Comparative efficacy, toxicity and biodistribution of the liposomal amphotericin B formulations Fungisome ® and AmBisome ® in murine cutaneous leishmaniasis.
- Author
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Wijnant GJ, Van Bocxlaer K, Yardley V, Harris A, Alavijeh M, Silva-Pedrosa R, Antunes S, Mauricio I, Murdan S, and Croft SL
- Subjects
- Amphotericin B blood, Amphotericin B chemistry, Animals, Antiprotozoal Agents therapeutic use, India epidemiology, Infusions, Intravenous, Leishmaniasis, Cutaneous epidemiology, Leishmaniasis, Cutaneous parasitology, Leishmaniasis, Visceral drug therapy, Leishmaniasis, Visceral parasitology, Mice, Mice, Inbred BALB C, Parasite Load, Tissue Distribution, Amphotericin B pharmacokinetics, Amphotericin B toxicity, Antiprotozoal Agents administration & dosage, Leishmania major drug effects, Leishmaniasis, Cutaneous drug therapy
- Abstract
Fungisome
® (F), a liposomal amphotericin B (AmB) product, is marketed in India as a safe and effective therapeutic for the parasitic infection visceral leishmaniasis. Its potential in the treatment of cutaneous leishmaniasis (CL), a disfiguring form of the disease affecting the skin, is currently unknown. Here, we report the evaluation of the efficacy of F in the Leishmania major BALB/c murine model of CL, including a head-to-head comparison with the standard liposomal AmB formulation AmBisome® (A). Upon intravenous administration at dose levels of 5, 10 and 15 mg/kg of body weight (on days 0, 2, 4, 6 and 8), F showed clear signs of toxicity (at 15 mg/kg), while A did not. After complete treatment (day 10), the tolerated doses of 5 and 10 mg/kg F had significant antileishmanial activity (ED50 = 4.0 and 12.8 mg/kg for qPCR-based parasite load and lesion size, respectively), although less than that of A at identical doses (ED50 = 3.0 and 8.8 mg/kg). The efficacy of F was inferior compared to A because lower levels of the active agent AmB accumulated within the infected lesion. In conclusion, despite possibly being less safe and efficacious than A at equivalent doses, the moderate in vivo activity of F could indicate a role in the systemic pharmacotherapy of CL., (Copyright © 2018. Published by Elsevier Ltd.)- Published
- 2018
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