Protection against ischemic brain damage by GDNF affecting cell survival and death signals

被引:51
作者
Jin, G [1 ]
Omori, N [1 ]
Li, F [1 ]
Nagano, I [1 ]
Manabe, Y [1 ]
Shoji, M [1 ]
Abe, K [1 ]
机构
[1] Okayama Univ, Grad Sch Med & Dent, Dept Neurol, Okayama 7008558, Japan
关键词
Akt; caspase-3; caspase-9; glial cell line-derived neurotrophic factor (GDNF); ischemia; rat;
D O I
10.1179/016164103101201454
中图分类号
R74 [神经病学与精神病学];
学科分类号
摘要
Neuroprotective effects of glial cell line-derived neurotrophic factor (GDNF) on cell survival and death signals were investigated after 90 min of transient middle cerebral artery occlusion (MCAO) in rats. Immunoreactivities of phosphorylated Akt (p-Akt), cleaved caspase-9 (c-cas9), and -3 (c-cas3) increased after the reperfusion in the penumbra in vehicle group with peaks at 3 h, S h, and 1 day, respectively. Topical application of GDNF (6.8 mug/9 mul) on brain surface potentiated and prolonged p-Akt activation, but suppressed activation of the caspases, and reduced the number of terminal deoxynucleotidyl transferase-mediated dUDP-biotin in situ nick labeling (TUNEL) positive cells: These results suggest that GDNF plays a protective role against ischemic injury by controlling the balance between Akt pathway and caspase cascades.
引用
收藏
页码:249 / 253
页数:5
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