Journal
NEUROREPORT
Volume 16, Issue 2, Pages 99-102Publisher
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1097/00001756-200502080-00004
Keywords
glial cell line-derived neurotrophic factor (GDNF); inducible NO synthase (iNOS); lipopolysaccharide (LPS); inflammation; microglia/macrophages; spinal cord injury
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Activation of microglia/macrophages after injury occurs limitedly in the CNS, which finding may explain unsuccessful axonal regeneration. Therefore, the relationship between lipopolysaccharide (LPS)-induced inflammation and recovery of locomotor function of rats after spinal cord injury was examined. High-dose LIPS improved locomotor function greater than low-dose LIPS, being consistent with the expression of neurotrophic factor (GDNF) in microglia/macrophages. Experiments using GDNF gene mutant mice confirmed that the increase in the GDNF mRNA level, rather than the reduction in the mRNA level of inducible NO synthase, could be correlated with the restoration activity of locomotor function. These results suggest that a higher degree of inflammation leads to a higher degree of repair of CNS injuries through GDNF produced by activated microglia/macrophages. (C) 2005 Lippincott Williams Wilkins.
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