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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Antileishmanial activity of liposome-encapsulated amphotericin B in hamsters and monkeys.

Visceral leishmaniasis (kala-azar) results from parasitization of the macrophages of the liver, spleen, and the rest of the visceral reticuloendothelial system with Leishmania donovani. Pentavalent antimony is the drug of choice for leishmaniasis chemotherapy; amphotericin B (AmB) is active but is rarely used, because of drug toxicity. AmB encapsulated within macrophage-directed carriers (liposomes) has been used to treat humans with systemic mycoses complicating neoplastic diseases; dosages of up to 5 mg of encapsulated AmB per kg per day for greater than 14 days are without apparent kidney or liver toxicity. In the present work, greater than 99% of L. donovani parasites were eliminated from the liver and spleen of infected hamsters by one administration of 1.5 to 11 mg of liposome-encapsulated AmB (L-Amb) per kg. A total of 98 to 99% of hepatosplenic parasites were eliminated from squirrel monkeys by three administrations of 4 mg of L-AmB per kg. L-AmB was 170 to 750 times as active as antimony in hamsters, and approximately 60 times as active as antimony in monkeys. The demonstration that apparently nontoxic human dosages of L-AmB eliminate essentially all hepatosplenic parasites in hamster and primate models suggests that this preparation should be considered for clinical trial against kala-azar.[1]

References

  1. Antileishmanial activity of liposome-encapsulated amphotericin B in hamsters and monkeys. Berman, J.D., Hanson, W.L., Chapman, W.L., Alving, C.R., Lopez-Berestein, G. Antimicrob. Agents Chemother. (1986) [Pubmed]
 
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