Differential role of N-methyl-D-aspartate receptor subunits 2A and 2B in mediating phencyclidine-induced perinatal neuronal apoptosis and behavioral deficits.
Differential role of N-methyl-D-aspartate receptor subunits 2A and 2B in mediating phencyclidine-induced perinatal neuronal apoptosis and behavioral deficits.
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DOI:
10.1016/j.neuroscience.2009.07.058
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发表时间:
2009-11-10
期刊:
影响因子:
3.3
通讯作者:
Johnson, K. M.
中科院分区:
文献类型:
--
作者:
Anastasio, N. C.;Xia, Y.;O'Connor, Z. R.;Johnson, K. M.
The mechanism underlying PCP-induced apoptosis in perinatal rats and the development of schizophrenic-like behaviors is incompletely understood. We used antagonists for NR2A- and NR2B-containing NMDARs to test the hypothesis that the behavioral and apoptotic effects of PCP are mediated by blockade of NR1/NR2A-containing receptors, rather than NR1/NR2B-containing receptors. Sprague-Dawley rats were treated on PN7, 9, and 11 with PCP (10 mg/kg), PEAQX (NR2A-preferring antagonist, 10, 20, or 40 mg/kg), or ifenprodil (selective NR2B antagonist, 1, 5, or 10 mg/kg) and sacrificed for measurement of caspase-3 activity (an index of apoptosis) or allowed to age and tested for locomotor sensitization to PCP challenge on PN28-35. PCP or PEAQX on PN7, 9, and 11 markedly elevated caspase-3 activity in the cortex; ifenprodil showed no effect. Striatal apoptosis was evident only after sub-chronic treatment with a high dose of PEAQX (20 mg/kg). Animals treated with PCP or PEAQX on PN7, 9 and 11 showed a sensitized locomotor response to PCP challenge on PN28-35. Ifenprodil treatment had no effect on either measure. Therefore, PCP blockade of cortical NR1/NR2A, rather than NR1/NR2B, appears to be responsible for PCP-induced apoptosis and the development of long-lasting behavioral deficits.
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