Cytotoxicity of 1-Amino-4-phenyl-1,2,3,6-tetrahydropyridine and 1-Amino-4-phenylpyridinium Ion, 1-Amino Analogues of MPTP and MPP<sup>+</sup>, to Clonal Pheochromocytoma PC12 Cells
1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) induces parkinsonism in humans after its oxidation into 1-methyl-4-phenylpyridinium ion (MPP+) by type B monoamine oxidase. The l-amino analogues of MPTP and MPP+, 1-amino-4-phenyl-1,2,3,6-tetrahydropyridine (APTP) and 1-amino-4-phenylpyridinium ion (APP(+)), were synthesized, and their cyto toxicity to clonal pheochromocytoma PC12 cells was examined using a tetrazolium formazan assay. After incubation for 48 and 72 h, both APP(+) and APTP were found to be cytotoxic to PC12 cells, whereas with the N-methyl analogues, only MPP+, but not MPTP, was cytotoxic. The cytotoxicity of APTP increased with incubation time and equaled that of MPP+ after 72 h. It was found that APTP was oxidized to APP(+) by type A monoamine oxidase in PC12 cells, suggesting that APP(+) itself may damage the cells. In addition to APTP and APP(+), N-amino analogues of N-methylisoquinolines and related derivatives were also synthesized and examined for their cytotoxicity to PC12 cells.
Johnson, David; Roberts, Ian; Taylor, Peter G., Journal of the Chemical Society. Perkin transactions II, 1981, p. 409 - 413
作者:Johnson, David、Roberts, Ian、Taylor, Peter G.
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BARBULESCU, EMILIA;POPESCU, MARIANA;POPESCU, MARIUS, REV. CHIM., 40,(1989) N, C. 17-19
作者:BARBULESCU, EMILIA、POPESCU, MARIANA、POPESCU, MARIUS
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Dimerization mechanism of the 1-alkyl-4-phenylpyridinyl radicals generated from the photosensitive dimer as studied by kinetic ESR spectroscopy