Effects of hypoxia on expression of P450 2C11 mRNA in cultured rat astrocytes
- VernacularTitle:缺氧对星形胶质细胞表达P450 2C11 mRNA的影响
- Author:
Youming FAN
;
Yuqi GAO
;
Fuyu LIU
;
Weigong LIAO
- Publication Type:Journal Article
- Keywords:
Anoxia;
Astrocytes;
Cytochrome P-450
- From:
Chinese Journal of Pathophysiology
1999;0(09):-
- CountryChina
- Language:Chinese
-
Abstract:
AIM: This study was designed to explore the effect of hypoxia on expression of P450 2C11 mRNA in cultured rat astrocytes. METHODS: Cultured rat astrocytes were randomly divided into 4 groups: glutamate group (G), hypoxic group (H), hypoxia + glutamate group (H+G) and control (C). Cells of control group were exposed to nomorxic (95% air, 5%CO 2) condition,that of G and H+G were incubated with 100 ?mol/L L-glutamate ,then cells of H and H+G exposed to hypoxic conditions (5%CO 2, 95%N 2) at 37℃?Each group had five timepoints which included 0 h, 3 h, 6 h, 12 h, 24 h, respectively. Expression of mRNAs of P450 2C11 were detected with reverse transcription ploymerase chain reaction (RT-PCR). RESULTS: Expression of P450 2C11 mRNA did not change in H and C at all the above mentioned timepoints. While it showed marked and continuous increase from 6 h to 24 h in G and from 3 h to 24 h in G+H. P450 2C11 mRNA expression was significantly higher in G than both in H and C, and it was the highest of all groups in G+H. CONCLUSIONS: Glutamate and hypoxia+glutamate increased the expression of P450 2C11 mRNA in cultured rat astrocytes continuously in 24 hours. Hypoxia alone did not increase the expression of P450 2C11 mRNA but enhanced the effect of glutamate on expression of P450 2C11 mRNA in astrocytes, which is maybe one of the mechanisms of hypoxic-induced cerebral dilation.
