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  • 标题:L-3,4-dihydroxyphenylalanine-induced hypersensitivity simulating features of denervation
  • 本地全文:下载
  • 作者:L C Tang ; G C Cotzias
  • 期刊名称:Proceedings of the National Academy of Sciences
  • 印刷版ISSN:0027-8424
  • 电子版ISSN:1091-6490
  • 出版年度:1977
  • 卷号:74
  • 期号:5
  • 页码:2126-2129
  • DOI:10.1073/pnas.74.5.2126
  • 语种:English
  • 出版社:The National Academy of Sciences of the United States of America
  • 摘要:The manner in which dyskinesia and intermittency of neurological control had emerged late in the therapy of Parkinsonism with L-3,4-dihydroxyphenylalanine (levodopa) had suggested to us that this drug can imprint on the brain a chemical memory of its passage. The majority of authors ascribed these events to denervation hypersensitivity caused by the nigral and other lesions of the disease. By feeding levodopa to mice, however, we induced a state that simulated denervations hypersensitivity, including hyperreaction to single injections of levodopa and increased dopamine-stimulated adenylate cyclase [ATP pyrophosphate-lyase (cyclizing), EC 4.6.1.1 ] activity in homogenates of caudate nuclei. These phenomena were not caused by actual denervation, because the hypersensitivity declined and disappeared some weeks after the dietary levodopa was stopped.
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