PMID- 17822911 OWN - NLM STAT- MEDLINE DCOM- 20080314 LR - 20181113 IS - 0969-9961 (Print) IS - 1095-953X (Electronic) IS - 0969-9961 (Linking) VI - 29 IP - 1 DP - 2008 Jan TI - The hyperbaric oxygen preconditioning-induced brain protection is mediated by a reduction of early apoptosis after transient global cerebral ischemia. PG - 1-13 AB - We hypothesized that the brain-protective effect of hyperbaric oxygen (HBO) preconditioning in a transient global cerebral ischemia rat model is mediated by the inhibition of early apoptosis. One hundred ten male Sprague-Dawley (SD) rats (300-350 g body weight) were allocated to the sham group and three other groups with 10 min of four-vessel occlusion, untreated or preconditioned with either 3 or 5 hyperbaric oxygenations. HBO preconditioning improved neurobehavioral scores and reduced mortality, decreased ischemic cell change, reduced the number of early apoptotic cells and hampered a conversion of early to late apoptotic alterations. HBO preconditioning reduced the immunoreactivity of phosphorylated p38 in vulnerable neurons and increased the expression of brain derived neurotrophic factor (BDNF) in early stage post-ischemia. However, preconditioning with 3 HBO treatments proved less beneficial than with 5 HBO treatments. We conclude that HBO preconditioning may be neuroprotective by reducing early apoptosis and inhibition of the conversion of early to late apoptosis, possibly through an increase in brain BDNF level and the suppression of p38 activation. FAU - Ostrowski, Robert P AU - Ostrowski RP AD - Department of Physiology and Pharmacology, Loma Linda University School of Medicine, Loma Linda, CA 92350, USA. FAU - Graupner, Gerhart AU - Graupner G FAU - Titova, Elena AU - Titova E FAU - Zhang, Jennifer AU - Zhang J FAU - Chiu, Jeffrey AU - Chiu J FAU - Dach, Neal AU - Dach N FAU - Corleone, Dalia AU - Corleone D FAU - Tang, Jiping AU - Tang J FAU - Zhang, John H AU - Zhang JH LA - eng GR - NS53407/NS/NINDS NIH HHS/United States GR - NS52492/NS/NINDS NIH HHS/United States GR - R01 NS053407/NS/NINDS NIH HHS/United States GR - R01 HD043120/HD/NICHD NIH HHS/United States GR - R01 HD043120-05/HD/NICHD NIH HHS/United States GR - R01 NS053407-02/NS/NINDS NIH HHS/United States GR - R01 NS045694/NS/NINDS NIH HHS/United States GR - R21 NS052492/NS/NINDS NIH HHS/United States GR - NS43338/NS/NINDS NIH HHS/United States GR - R01 NS043338/NS/NINDS NIH HHS/United States GR - NS45694/NS/NINDS NIH HHS/United States GR - R01 NS043338-05/NS/NINDS NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural DEP - 20070728 PL - United States TA - Neurobiol Dis JT - Neurobiology of disease JID - 9500169 RN - 0 (Annexin A5) RN - 0 (Brain-Derived Neurotrophic Factor) RN - EC 3.4.22.- (Caspase 3) SB - IM MH - Analysis of Variance MH - Animals MH - Annexin A5/metabolism MH - Apoptosis/*physiology MH - Astrocytes/metabolism/pathology MH - Brain/*pathology MH - Brain-Derived Neurotrophic Factor/metabolism MH - Caspase 3/metabolism MH - Cell Count/methods MH - Disease Models, Animal MH - Enzyme-Linked Immunosorbent Assay/methods MH - Gait Disorders, Neurologic/etiology MH - *Hyperbaric Oxygenation MH - In Situ Nick-End Labeling/methods MH - Ischemic Attack, Transient/complications/mortality/*pathology/prevention & control MH - Ischemic Preconditioning/*methods MH - Male MH - Rats MH - Rats, Sprague-Dawley MH - Severity of Illness Index MH - Time Factors PMC - PMC2190110 MID - NIHMS36374 EDAT- 2007/09/08 09:00 MHDA- 2008/03/15 09:00 PMCR- 2009/01/01 CRDT- 2007/09/08 09:00 PHST- 2007/05/02 00:00 [received] PHST- 2007/06/25 00:00 [revised] PHST- 2007/07/17 00:00 [accepted] PHST- 2007/09/08 09:00 [pubmed] PHST- 2008/03/15 09:00 [medline] PHST- 2007/09/08 09:00 [entrez] PHST- 2009/01/01 00:00 [pmc-release] AID - S0969-9961(07)00171-4 [pii] AID - 10.1016/j.nbd.2007.07.020 [doi] PST - ppublish SO - Neurobiol Dis. 2008 Jan;29(1):1-13. doi: 10.1016/j.nbd.2007.07.020. Epub 2007 Jul 28.