Dopamine induces apoptosis-like cell death in cultured chick sympathetic neurons - A possible novel pathogenetic mechanism in Parkinson's disease

Ilan Ziv, Eldad Melamed*, Nurit Nardi, Drorit Luria, Anat Achiron, Daniel Offen, Ari Barzilai

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

We report that exposure of cultured, postmitotic chick-embryo sympathetic neurons, to physiological concentrations of dopamine (0.1-1 mM) for 24 h initiates a cellular death process characteristic of apoptosis (= programmed-cell-death, PCD). Dopamine caused marked morphological alterations, mainly axonal disintegration and severe shrinkage and condensation of cell bodies. Flow-cytometric analysis of propidium-iodide-stained cell nuclei revealed the characteristic apoptotic nuclear fragmentation: increase in nuclear granularity and emergence of a large, distinct population of nuclei with reduced DNA content (subdiploid, apoptotic peak). These alterations were similar to changes induced by nerve growth factor (NGF) deprivation, a model of sympathetic neuronal PCD. Alterations were inhibited by the anti-oxidative agent DTT. Inappropriate, dopamine-induced activation of PCD might have a role in nigral neuronal degeneration in Parkinson's disease.

Original languageEnglish
Pages (from-to)136-140
Number of pages5
JournalNeuroscience Letters
Volume170
Issue number1
DOIs
StatePublished - 28 Mar 1994

Keywords

  • Apoptosis
  • DNA damage
  • Dopamine
  • Flow-cytometry
  • Free radical
  • Parkinson's disease

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