DuP 105

Animal experiment:

The mice are made neutropenic by the intraperitoneal administration of 100 mg of cyclophosphamide per kg on days -5, -3, and 0 (the day of infection). The extent of immunosuppression is assessed by using a standard hematological technique to determine leukocyte counts. In all experiments, the leukocyte count in the cyclophosphamide-treated mice is less than 15% of that in nontreated mice from day 0 through day 7. On day 0, the mice are injected intraperitoneally with a bacterial inoculum suspended in 0.2 mL of saline containing 5% gastric porcine mucin. This inoculum (2×104 CFU) is fivefold that required to kill all the nontreated immunosuppressed mice in 48 h. Graded doses of the test compounds are administered by the subcutaneous or oral route at 1 and 4 h after infection. In parallel with the immunosuppressed mice, groups of nonimmunosuppressed mice are infected, and treated with the antibacterial drugs. The number of survivors on day 7 in each group is used to calculate the ED50 values of the test compounds.

References:

[1]. Slee AM, et al. Oxazolidinones, a new class of synthetic antibacterial agents: in vitro and in vivo activities of DuP 105 and DuP 721. Antimicrob Agents Chemother. 1987 Nov;31(11):1791-7.
[2]. Barry AL, et al. In vitro evaluation of DuP 105 and DuP 721, two new oxazolidinone antimicrobial agents. Antimicrob Agents Chemother. 1988 Jan;32(1):150-2.