Selective Cytotoxicity of Piperine on Cultured Rat Hippocampal Neurons in Comparison with Cultured Astrocytes : The Possible Involvement of Lipid Peroxidation

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概要

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• The present study investigated the selective cytotoxicity of piperine on cultured brain cells by using lactate dehydrogenase release, 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium reduction, and protein content assay. Exposure to piperine induced marked injuries on cultured hippocampal neurons whereas it induced only a marginal toxicity on cultured astrocytes. The mechanism of cytotoxicity in hippocampal neurons was studied by pharmacological methods. The membrane-permeable free radical scavengers, D-α-tocopherol and trolox, protected neurons from piperine toxicity whereas membrane-impermeable agents, superoxide dismutase and catalase, were ineffective. A lipoxygenase inhibitor, nordihydroguaiaretic acid, but not a cyclo-oxygenase inhibitor, indomethacin, attenuated piperine toxicity. We provide the first evidence that piperine induces selective neurotoxicity in vitro. Although the exact mechanism is still unclear, pharmacological evidence indicates the possible involvement of lipid peroxidation and the generation of free radicals, at least partly, through an arachidonate-lipoxygenase pathway.

• 公益社団法人日本薬学会の論文
• 1997-09-15

著者

• SAITO HIROSHI

  Department of Neurology, Tohoku University School of Medicine

• 斉藤 博満

  協和発酵・東京研

• Nishiyama N

  Laboratory Of Chemical Pharmacology Graduate School Of Pharmaceutical Sciences The University Of Tok

• Nishiyama Nobuyoshi

  Department Of Chemical Pharmacology Faculty Of Pharmaceutical Sciences The University

• Saito H

  Department Of Pharmacology College Of Pharmacy Nihon University

• Unchern Surachai

  Department Of Chemical Pharmacology Faculty Of Pharmaceutical Sciences The University Of Tokyo

• Saito Hiroshi

  Department Of Cardiovascular Medicine Osaka University Graduate School Of Medicine

• Saito Hiroshi

  Department of Applied Chemistry, Graduate School of Engineering, Tohoku University

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