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Summary Statement

Spinal cord injury is characterised by an inflammatory cascade that leads to neuronal death by neurotoxicity. In a model of spinal cord damage we successfully preserved the number of ventral horn neurons by treatment with interleukin-1 receptor antagonist (IL1RA) and neurotrophin (NT)-3.

Introduction

Secondary damage after spinal cord injury (SCI) is characterised by activation of microglial cells that release neurotoxic agents. This results in apoptotic death of neurons that survived the initial trauma. Interleukin (IL)-1 is one of the most prominent mediators of neurotoxicity. Organotypic spinal cord slice cultures (OSCSC) are a useful in vitro model of spinal cord injury. We have previously shown that OSCSC degenerate substantially during in vitro incubation under standard conditions. Our aim was to treat OSCSC with the putatively neuroprotective agents IL-1 receptor antagonist (IL1RA) and neurotrophin (NT)-3 and to evaluate neuronal and microglial populations as well as axonal preservation. We hypothesised that treatment with the above substances would enhance neuronal survival and suppress microglial activation.