PMID: 7543935Sep 1, 1995Paper

Induction of heme oxygenase-1 mRNA and protein in neocortex and cerebral vessels in Alzheimer's disease

Journal of Neurochemistry
D R PremkumarR N Kalaria

Abstract

Previous studies demonstrated the specific association of heme oxygenase (HO)-1 protein to the neurofibrillary pathology of Alzheimer's disease (AD). In this study, we used reverse transcription-polymerase chain reaction methods to show the increased expression of HO-1 but not HO-2 mRNA transcripts in cerebral cortex and cerebral vessels from subjects with AD compared with age-matched non-AD controls. Neither the HO-1 nor the HO-2 mRNA levels was altered in the cerebellum, a brain region usually spared from the pathological alterations of AD. There was no clear evidence that the expression of HO-1 in these tissues was related to postmortem interval, cause of death, or the age of the subjects studied. Using immunoblotting methods, we further showed that HO-1 protein content was increased in neocortical and vascular samples from AD subjects compared with controls. Our findings suggest the specific induction of HO-1 mRNA and protein in the cerebral cortex and cerebral vessels but not HO-2 mRNA or protein in association with the pathological lesions of the disease.

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