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Title: Acute enhancement of synaptic transmission and chronic inhibition of synaptogenesis induced by perfluorooctane sulfonate through mediation of voltage-dependent calcium channel
Author: Liao, Chun-Yang ; Li, Xiang-Yao ; Wu, Bei ; Duan, Shumin ; Jiang, Gui-Bin
Source: ENVIRONMENTAL SCIENCE & TECHNOLOGY
Issued Date: 2008
Volume: 42, Issue:14, Pages:5335-5341
Keyword: PERFLUORINATED COMPOUNDS ; NEURITE OUTGROWTH ; CA2+ CHANNELS ; GROWTH CONE ; IN-VITRO ; PFOA ; RAT ; COMPARTMENTALIZATION ; EXCITABILITY ; PLASTICITY
Subject: Engineering ; Environmental Sciences & Ecology
Corresponding Author: Duan, SM (reprint author), Chinese Acad Sci, Shanghai Inst Biol Sci, Inst Neurosci, Shanghai 200031, Peoples R China,shumin@ion.ac.cn ; gbjiang@rcees.ac.cn
English Abstract: Perfluorooctane sulfonate (PFOS) is a persistent and bioaccumulative pollutant ubiquitous in wildlife and humans. Although the distribution and fate of PFOS have been widely studied, its potential neurotoxicity remains largely unknown. In the present study, the acute and chronic effects of PFOS on the development and synaptic transmission of hippocampal neurons was examined. Perfusion with PFOS markedly increased the frequency of miniature postsynaptic currents (mPSCs) and slightly elevated the amplitude of mPSCs in cultured hippocampal neurons. Perfusion with PFOS also increased the amplitude of field excitatory postsynaptic potentials (fEPSPs) recorded in the CA1 region of hippocampal slices. Both of these effects were largely blocked by the L-type Cal(2+) channel antagonist nifedipine. Further studies showed that PFOS enhanced inward Ca(2+) currents and increased intracellular Ca(2+) in cultured neurons; these effects were also substantially inhibited by nifedipine. Moreover, prolonged treatment with PFOS moderately inhibited neurite growth and dramatically suppressed synaptogenesis in cultured neurons in a nifedipine-sensitive manner. Thus, through enhancement of Ca(2+) channels, PFOS may exhibit both acute excitotoxic effects on synaptic function and chronically inhibit synaptogenesis in the brain.
Indexed Type: sci
Language: 英语
Content Type: 期刊论文
URI: http://ir.sibs.ac.cn/handle/331001/1714
Appears in Collections:神经所(总)_期刊论文

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Liao, Chun-Yang; Li, Xiang-Yao; Wu, Bei; Duan, Shumin; Jiang, Gui-Bin.Acute enhancement of synaptic transmission and chronic inhibition of synaptogenesis induced by perfluorooctane sulfonate through mediation of voltage-dependent calcium channel,ENVIRONMENTAL SCIENCE & TECHNOLOGY,2008,42(14):5335-5341
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