Preliminary animal pharmacokinetics of the parenteral antifungal agent MK-0991 (L-743,872)

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Preliminary animal pharmacokinetics of the parenteral antifungal agent MK-0991 (L-743,872).

MK-0991 (L-743,872) is a potent antifungal agent featuring long half-life pharmacokinetics. The pharmacokinetics of MK-0991 administered intravenously to mice, rats, rhesus monkeys, and chimpanzees is presented. Unique to MK-0991 is its consistent cross-species performance. The range of values for the pharmacokinetic parameters were as follows: clearance, 0.26 to 0.51 ml/min/kg; half-life, 5.2 ...

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Evaluation of the echinocandin antifungal MK-0991 (L-743,872): efficacies in mouse models of disseminated aspergillosis, candidiasis, and cryptococcosis.

The in vivo activity of the Merck antifungal echinocandin drug candidate MK-0991 (L-743,872) was evaluated in mouse models of disseminated candidiasis, aspergillosis, and cryptococcosis. The echinocandins are potent inhibitors of 1,3-beta-D-glucan synthase. Two models of disseminated candidiasis were used. In a Candida albicans mouse survival model with both DBA/2N and CD-1 mice, estimates of t...

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Synergistic antifungal activities of bafilomycin A(1), fluconazole, and the pneumocandin MK-0991/caspofungin acetate (L-743,873) with calcineurin inhibitors FK506 and L-685,818 against Cryptococcus neoformans.

Cryptococcus neoformans is an opportunistic fungal pathogen that causes life-threatening infections of the central nervous system. Existing therapies include amphotericin B, fluconazole, and flucytosine, which are limited by toxic side effects and the emergence of drug resistance. We recently demonstrated that the protein phosphatase calcineurin is required for growth at 37 degrees C and virule...

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Animal pharmacokinetics of FK037, a novel parenteral broad-spectrum cephalosporin.

Single-dose pharmacokinetics of FK037 has been investigated in laboratory animals. After bolus intravenous dosing with 20 mg/kg, the elimination half-life of FK037 varied in the species; with values of 0.27, 0.30, 0.97, 1.29 and 1.76 hours in mice, rats, rabbits, dogs and monkeys, respectively. The volume of distribution ranged between 260 ml/kg in rats and 390 ml/kg in dogs. These parameters a...

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Caspofungin: the first agent available in the echinocandin class of antifungals.

Caspofungin acetate (Cancidas, MK-0991, L-743,872) is a parenteral antifungal agent indicated in the treatment of invasive aspergillosis in patients who are intolerant of or whose infection is refractory to other antifungal therapies. It is the first member of a novel class of antifungals, the echinocandins, to be made available in the USA. As a class, the echinocandins possess a mechanism of a...

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ژورنال

عنوان ژورنال: Antimicrobial Agents and Chemotherapy

سال: 1997

ISSN: 0066-4804,1098-6596

DOI: 10.1128/aac.41.11.2339