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Taurine reduces inflammatory responses after spinal cord injury.
Journal of Neurotrauma 2010 Februrary
Taurine has multiple functions in the central nervous system (CNS), serving as an osmoregulator, antioxidant, inhibitory neuromodulator, and regulator of intracellular Ca(2+) flux. Since the role of taurine in traumatic spinal cord injury (SCI) is not fully understood, the present study was conducted with C57 black/6 mice (18-20 g) who underwent severe SCI at the Th-8 level using a weight compression device. Taurine was injected intraperitoneally at doses of 25, 80, 250, and 800 mg/kg within 30 min after SCI. Controls were injected with saline. The contusional cord segments were removed 6 h after SCI, and concentrations of interleukin-6 (IL-6) and myeloperoxidase (MPO) were measured using ELISA kits. Phosphorylation of STAT3, which is activated by IL-6, and expression of inducible cyclooxygenase-2 (COX-2) were also compared between the taurine treatment group (250 mg/kg) and the control group by Western blot analysis. Morphological changes were evaluated with H&E-stained sections. Taurine significantly decreased IL-6 and MPO levels in a dose-dependent manner, significantly reducing the phosphorylation of STAT3 and expression of COX-2 after SCI compared to controls. A reduced accumulation of neutrophils, especially in the subarachnoid spaces, and secondary degenerative changes in gray matter were also noted, and motor disturbances were significantly attenuated with taurine treatment (250 mg/kg). These findings indicate that taurine has anti-inflammatory effects against SCI, and may play a neuroprotective role against secondary damage, and thus it may have therapeutic potential.
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