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  • Title: Dose-dependent improvements in outcome with adenoviral expression of interleukin-10 in a murine model of multisystem organ failure.
    Author: McAuliffe PF, Murday ME, Efron PA, Scumpia PO, Ungaro R, Abouhamze A, Tannahill CL, Hutchins B, LaFace D, Moldawer LL.
    Journal: Gene Ther; 2006 Feb; 13(3):276-82. PubMed ID: 16251998.
    Abstract:
    Targeted expression of interleukin-10 (IL-10) has been proposed as a means to suppress acute and chronic inflammation. We explored the capacity of targeted adenoviral expression of human or viral IL-10 to improve outcome in a zymosan-induced model of acute lung injury and multisystem organ failure. Intratracheal administration of adenovirus expressing either human or viral IL-10 prior to zymosan administration significantly improved survival at a dose of 10(7) particles (P<0.01), whereas the same recombinant vectors were ineffective at 10(8) particles and increased mortality at 10(9) particles. Improved survival after administration of 10(7) particles of adenovirus expressing viral or human IL-10 was associated with local tissue expression of IL-10 (100-300 pg/g wet wt). In contrast, mortality after administration of 10(9) particles was associated with markedly elevated IL-10 expression, both in the lung (10000-70000 pg/g wet wt) and systemically (1000-3000 pg/ml plasma), with evidence of an exaggerated systemic inflammatory response (plasma IL-6 and TNFalpha). Targeted gene expression of IL-10 can be used to treat acute inflammatory processes, but increased doses resulting in its systemic release are not associated with improvements in outcome, and may actually exacerbate acute inflammatory processes.
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