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  • Title: A single dose of pegylated leridistim significantly improves neutrophil recovery in sublethally irradiated rhesus macaques.
    Author: Farese AM, Casey DB, Vigneulle RM, Siegel NR, Finn RF, Klover JA, Smith WG, McKearn JP, MacVittie TJ.
    Journal: Stem Cells; 2001; 19(6):514-21. PubMed ID: 11713343.
    Abstract:
    Leridistim, a member of the myelopoietin family of dual receptor agonists that binds interleukin-3 and G-CSF receptors, has been shown to enhance hematopoietic activity in rhesus monkeys above that observed with either cytokine alone or in combination. This study demonstrated the ability of a pegylated form of leridistim (peg-leridistim), administered s.c., as a single- or two-dose regimen separated by 4 or 7 days, to significantly improve neutrophil recovery following radiation-induced myelosuppression. Rhesus macaques were total body x-irradiated (250 kVp, TBI) to 600 cGy. Following TBI, two groups received peg-leridistim (n = 5) or leridistim (n = 4) at a dose of 600 microg/kg on day 1, while two other groups (both n = 4) received peg-leridistim at 200 microg/kg on day 1 and day 4, or day 1 and day 7. The irradiation controls (n = 7) received 0.1% autologous serum for 18 days. All peg-leridistim treatment schedules significantly improved all neutrophil-related parameters following TBI as compared with nontreated controls and were equivalent in effect when compared among themselves. Administration of a single high dose or two separate lower doses of peg-leridistim significantly improved neutrophil regeneration, in a manner equal to that of conventional daily or abbreviated every-other-day administration of leridistim in this nonhuman primate model of severe myelosuppression.
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