Methylprednisolone neutralizes the beneficial effects of erythropoietin in experimental spinal cord injury.

Anna Barbara Di Stefano, Stephana Carelli, Anthony Cerami, Michael Brines, Barbara Di Stefano, Silvia De Biasi, Alfredo Gorio, Anna Maria Di Giulio, Thomas Coleman, Laura Madaschi

Risultato della ricerca: Articlepeer review

100 Citazioni (Scopus)

Abstract

Inflammation plays a major pathological role in spinal cord injury (SCI). Although antiinflammatory treatment using the glucocorticoid methyprednisolone sodium succinate (MPSS) improved outcomes in several multicenter clinical trials, additional clinical experience suggests that MPSS is only modestly beneficial in SCI and poses a risk for serious complications. Recent work has shown that erythropoietin (EPO) moderates CNS tissue injury, in part by reducing inflammation, limiting neuronal apoptosis, and restoring vascular autoregulation. We determined whether EPO and MPSS act synergistically in SCI. Using a rat model of contusive SCI, we compared the effects of EPO [500-5,000 units/kg of body weight (kg-bw)] with MPSS (30 mg/kg-bw) for proinflammatory cytokine production, histological damage, and motor function at 1 month after a compression injury. Although high-dose EPO and MPSS suppressed proinflammatory cytokines within the injured spinal cord, only EPO was associated with reduced microglial infiltration, attenuated scar formation, and sustained neurological improvement. Unexpectedly, coadministration of MPSS antagonized the protective effects of EPO, even though the EPO receptor was up-regulated normally after injury. These data illustrate that the suppression of proinflammatory cytokines alone does not necessarily prevent secondary injury and suggest that glucocorticoids should not be coadministered in clinical trials evaluating the use of EPO for treatment of SCI.
Lingua originaleEnglish
pagine (da-a)16379-16384
Numero di pagine6
RivistaProceedings of the National Academy of Sciences of the United States of America
VolumeVol. 102
Stato di pubblicazionePublished - 2005

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