Abstract
Neuron-specific enolase (NSE) levels were measured by sandwich enzymo-immunoassay as well as by enzymatic assay in rat cerebrospinal fluid (CSF), following mechanical lesions of the brain tissue. Significant increases of NSE were observed in CSF, with a peak 2 h following lesions located near the lateral ventricle. Values returned to normal around 48 h later. In another experimental group, lesions were realized further away from the lateral ventricle; the elevation of NSE in CSF reached the maximal value 11 h later. In addition, measurements which were performed following lesions at the same location but of various sizes, indicated that the quantity of NSE released is proportional to the extent of brain damage. The possible factors which govern the time course and amount of NSE release in CSF are discussed. These results suggest that NSE could be a useful and easily detected marker of neuronal damage.
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