Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
2000-12-21
pubmed:abstractText
Extracellular heme derived from hemoglobin following hemorrhage or released from dying cells induces the expression of heme oxygenase-1 (HO-1, HSP-32) which metabolizes heme to the gaseous mediator carbon monoxide (CO), iron (Fe) and biliverdin. Biliverdin and its product bilirubin are powerful antioxidants. Thus, expression of HO-1 is considered to be a protective mechanism against oxidative stress and has been described in microglia, astrocytes and neurons following distinct experimental models of pathological alterations to the brain such as subarachnoidal hemorrhage, ischemia and traumatic brain injury (TBI) and in human neurodegenerative diseases. We have now analyzed the expression of HO-1 in human brains following TBI (n = 28; survival times: few minutes up to 6 months) and focal cerebral infarctions (FCI; n = 17; survival time: < 1 day up to months) by immunohistochemistry. Follwing TBI, accumulation of HO-1+ microglia/macrophages at the hemorrhagic lesion was detected as early as 6 h post trauma and was still pronounced after 6 months. In contrast, after FCI HO-1+ microglia/macrophages accumulated within focal hemorrhages only and were absent in non-hemorrhagic regions. Further, HO-1 was weakly expressed in astrocytes in the perifocal penumbra. In contrast to experimental data derived from rat focal ischemia, these results indicate a prolonged HO-1 expression in humans after brain injury.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
0001-6322
pubmed:author
pubmed:issnType
Print
pubmed:volume
100
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
377-84
pubmed:dateRevised
2007-11-9
pubmed:meshHeading
pubmed-meshheading:10985695-Adolescent, pubmed-meshheading:10985695-Adult, pubmed-meshheading:10985695-Aged, pubmed-meshheading:10985695-Aged, 80 and over, pubmed-meshheading:10985695-Bilirubin, pubmed-meshheading:10985695-Brain Injuries, pubmed-meshheading:10985695-Brain Ischemia, pubmed-meshheading:10985695-Cerebral Infarction, pubmed-meshheading:10985695-Female, pubmed-meshheading:10985695-Follow-Up Studies, pubmed-meshheading:10985695-Gene Expression Regulation, pubmed-meshheading:10985695-Heme Oxygenase (Decyclizing), pubmed-meshheading:10985695-Heme Oxygenase-1, pubmed-meshheading:10985695-Humans, pubmed-meshheading:10985695-Isoenzymes, pubmed-meshheading:10985695-Male, pubmed-meshheading:10985695-Membrane Proteins, pubmed-meshheading:10985695-Middle Aged, pubmed-meshheading:10985695-Nerve Tissue Proteins, pubmed-meshheading:10985695-Time Factors
pubmed:year
2000
pubmed:articleTitle
Long-term expression of heme oxygenase-1 (HO-1, HSP-32) following focal cerebral infarctions and traumatic brain injury in humans.
pubmed:affiliation
Institute of Brain Research, University of Tübingen, Germany. rudi.beschorner@med.uni-tuebingen.de
pubmed:publicationType
Journal Article, Comparative Study, Research Support, Non-U.S. Gov't