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Inhibition of neuron-specific CREB dephosphorylation is involved in propofol and ketamine-induced neuroprotection against cerebral ischemic injuries of mice.

Abstract：

:Propofol and ketamine may provide certain degree of neuroprotection, but the underlying mechanism remains unclear to date. The cAMP response element-binding protein (CREB) was proposed that its phosphorylation at Ser133 (P-CREB) constituted a convergence point involved in neuroprotection. The purpose of this study was to determine whether different dosages of propofol and ketamine could provide neuroprotection against permanent middle cerebral artery occlusion (MCAO)-induced ischemic injuries and the involvement of P-CREB. Eighty adult male BALB/c mice that underwent 6 h MCAO were randomly divided into eight groups: Sham-operation; MCAO + saline; MCAO + 25, 50, 100 mg/kg propofol; and MCAO + 25, 50, 100 mg/kg ketamine (intraperitoneal injection 30 min following MCAO). We found that 50, 100 (not 25) mg/kg propofol, and 25 (not 50 and 100) mg/kg ketamine could significantly reduce the infarct volume, edema ratio and neurological deficit (n = 10 per group) as well as inhibit the decrease of P-CREB level in peri-infarct region when compared with that of MCAO + saline group (n = 6 per group). In addition, the results of double-labeled immunofluorescent staining showed that P-CREB co-localized with neuron-specific marker, NeuN, in the peri-infarct region of 50 mg/kg propofol and 25 mg/kg ketamine treated 6 h MCAO mice (n = 4 per group). These results suggested that inhibition of neuron-specific P-CREB dephosphorylation in the peri-infarct region is involved in high dose propofol and low dose ketamine-induced neuroprotection of 6 h MCAO mice.

journal_name

Neurochem Res

journal_title

Neurochemical research

authors

Shu L,Li T,Han S,Ji F,Pan C,Zhang B,Li J

doi

10.1007/s11064-011-0582-3

subject

Has Abstract

pub_date

2012-01-01 00:00:00

pages

49-58

issue

1

eissn

0364-3190

issn

1573-6903

journal_volume

37

pub_type

杂志文章

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