Abstract | OBJECTIVE: METHODS: Cultured for 9 - 10 d in vitro, the hippocampal neurons of Sprague-Dawley rats were assigned to the following 5 groups randomly: Control (Group A), Anoxia (Group B), Anoxia + DZ100 micromol/L (Group C), Anoxia + DZ100 micromol/L + 5-hydroxydecanoate (Group D), Anoxia + DZ100 micromol/L + LY294002 50 micromol/L (Group E). Prior to oxygen deprivation, the hippocampal neurons were treated with DZ for 1 h per day and this treatment was persisted for 3 d. Each experiment was repeated for three times and each group contained 16 wells or 2 dishes of neurons for each time. Thereafter, neurons were derived of oxygen for 4 h. At 48 h of reoxygenation the neuronal optical density (A) were measured by MTT method, while the apoptotic rates were assayed by annexin V-FITC staining. The expressions of Akt, Bcl-2 and Bax proteins were detected and evaluated by Western blot. RESULTS: Compared with other pretreatment, DZ 100 micromol/L led to the elevation of A, whereas promoted the decrease of apoptotic rate (P < 0.05). Compared with those in other anoxic groups, the expressions of Akt protein and Bcl-2 protein in Group C were increased significantly (P < 0.05), whereas the Bax density were reduced significantly (P < 0.05). Preceding administration of 100 micromol/L DZ took protective effects on the neurons induced by anoxia-reoxygenation. CONCLUSIONS: DZ 100 micromol/L increased Akt protein to up-regulate Bcl-2/ Bax protein ratio against apoptosis induced by anoxia-reoxygenation.
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Authors | Rong-guo Liu, Na Song, Jie-meng Li, Xiang Cui, Yan-qing Chen |
Journal | Zhonghua yi xue za zhi
(Zhonghua Yi Xue Za Zhi)
Vol. 90
Issue 7
Pg. 492-5
(Feb 23 2010)
ISSN: 0376-2491 [Print] China |
PMID | 20368077
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Chemical References |
- Proto-Oncogene Proteins c-akt
- Diazoxide
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Topics |
- Animals
- Apoptosis
(drug effects)
- Cells, Cultured
- Diazoxide
(pharmacology, therapeutic use)
- Hippocampus
(cytology, drug effects)
- Hypoxia
(metabolism)
- Neurons
(cytology, drug effects)
- Proto-Oncogene Proteins c-akt
(metabolism)
- Rats
- Rats, Sprague-Dawley
- Signal Transduction
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