COMPARATIVE STUDY
JOURNAL ARTICLE

Long-circulating immunoliposomal amphotericin B against invasive pulmonary aspergillosis in mice

T Otsubo, K Maruyama, S Maesaki, Y Miyazaki, E Tanaka, T Takizawa, K Moribe, K Tomono, T Tashiro, S Kohno
Antimicrobial Agents and Chemotherapy 1998, 42 (1): 40-4
9449258
We investigated the efficacy of long-circulating immunoliposomal amphotericin B (AmB) against invasive pulmonary aspergillosis in mice using three types of liposomal AmB: conventional liposomal AmB (AmBisome), a long-circulating liposomal AmB and prepared by coating the liposome surface with polyethylene glycol (PEG; PEG-L-AmB), long-circulating immunoliposomal AmB (34A-PEG-L-AmB). The survival rates for mice with invasive pulmonary aspergillosis treated with an intravenous dose of 2 mg of AmBisome, PEG-L-AmB, or 34A-PEG-L-AmB per kg of body weight were 16.7, 83.3, and 100%, respectively. Treatment with 34A-PEG-L-AmB produced a marked reduction in the number of Aspergillus fumigatus organisms in the lungs. Pharmacokinetic studies showed the presence of high AmB concentrations in the plasma of mice treated with PEG-L-AmB (40.8 microg/ml) and in the lungs of mice treated with 34A-PEG-L-AmB (42.3 microg/g). We conclude that 34A-PEG-L-AmB, a long-circulating immunoliposomal AmB, is a promising form of AmB against invasive pulmonary aspergillosis.

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