Abstract
The protective effects of diltiazem were examined in a rabbit model of spinal cord ischaemia-reperfusion induced by infrarenal aortic occlusion for 30 min. In the diltiazem group (n = 6), an intravenous infusion (2 microg/kg per min) was started 10 min before ischaemia induction; normal saline solution was infused in the control group (n = 6). Neurological function was assessed using modified Tarlov criteria 24 h after surgery. Plasma samples were analysed for interleukin (IL)-6 and IL-10. Spinal tissue was analysed for malondialdehyde, nitric oxide and reduced glutathione activities. Tarlov scores of the diltiazem-treated rabbits indicated significantly improved hind-limb motor function compared with the control group. The diltiazem group also had better quantitative and qualitative histopathological findings. Diltiazem infusion significantly reduced IL-6 levels 3 and 24 h after reperfusion compared with the control group. The mean IL-10 level in the diltiazem group was significantly higher than in the control group 24 h after reperfusion. It is concluded that diltiazem has cytoprotective and anti-inflammatory properties, leading to reduced spinal cord injury.
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