Heme oxygenase-1 and heat shock protein 70 induction in glia and neurons throughout rat brain after experimental intracerebral hemorrhage

Neurosurgery
P G MatzF R Sharp

Abstract

Current experimental evidence demonstrates the development of ischemic regions adjacent to and spatially remote from an intracerebral hematoma. The cause of this ischemia is uncertain. Because ischemia is a known inducer of stress genes, we investigated the induction of two stress proteins, heme oxygenase (HO)-1 and heat shock protein (Hsp) 70, after intracerebral hemorrhage in the rat. Immunocytochemistry for HO-1, Hsp70, and HO-2, the constitutive isoform of the HO enzyme, was performed 1, 2, and 4 days after striatal injection of saline, whole blood, or lysed blood. Immunocytochemistry for HO-1, HO-2, and Hsp70 was also performed 1 day after cortical injection of saline, whole blood, or lysed blood. After striatal injection of lysed and whole blood, the HO-1 protein was induced in glia throughout the hemisphere ipsilateral to the hematoma, and HO-1 immunoreactivity persisted for at least 4 days. After cortical injection of lysed and whole blood, HO-1 was induced in glia throughout the neocortex. Neuronal induction of HO-1 was also observed after cortical injection of lysed blood but not whole blood or saline. After striatal injection of lysed blood, Hsp70 was induced in glia surrounding the hematoma and in neurons from the n...Continue Reading

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Citations

Oct 12, 2000·Journal of Neuroimmunology·H J Schluesener, K Seid
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