Abstract:
:Calcium is an important mediator of programmed cell death induced by transient cerebral ischemia, and calcium-binding proteins have been implicated in calcium-regulated signal transduction. Apoptosis-linked gene 2 is a calcium-binding protein required for cell death induced by different apoptotic stimuli. By Western blot analysis, we found that apoptosis-linked gene 2 protein was expressed in normal brains, and that expression increased in ischemic brains after 20 or 90 min of transient focal cerebral ischemia. Immunocytochemistry showed increased apoptosis-linked gene 2 protein expression in frontal cortex, a region where neurons underwent ischemic stress but still survived, after 20 or 90 min of focal cerebral ischemia. Apoptosis-linked gene 2 protein was also up-regulated in the ischemic border-zone of parietal cortex 24h after 20 min of focal ischemia, and was remarkably over-expressed in the caudate-putamen and parietal cortex, (where cells are destined to die) 24h after 90 min of ischemia. The expression pattern of apoptosis-linked gene 2 protein was similar to that of deoxyribonucleic acid damage detected by Klenow labeling assay. Our results suggest that apoptosis-linked gene 2 may be involved in the regulation of cell death after transient focal cerebral ischemia.
journal_name
Neurosciencejournal_title
Neuroscienceauthors
Li W,Jin K,Nagayama T,He X,Chang J,Minami M,Graham SH,Simon RP,Greenberg DAdoi
10.1016/s0306-4522(99)00531-xkeywords:
subject
Has Abstractpub_date
2000-01-01 00:00:00pages
161-8issue
1eissn
0306-4522issn
1873-7544pii
S0306-4522(99)00531-Xjournal_volume
96pub_type
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