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FK506 and cyclosporin A enhance the survival of cultured and grafted rat embryonic dopamine neurons

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Author

Summary, in English

We examined the effects of the immunophilin ligands and calcineurin inhibitors FK506 and cyclosporin A on the survival of rat embryonic dopamine (tyrosine hydroxylase (TH)-immunoreactive) neurons. The protective effects of FK506 and cyclosporin A were first studied in dissociated mesencephalic cell cultures subjected to serum deprivation. Significant increases in both the total number of surviving mesencephalic cells and the number of surviving TH-immunoreactive neurons were observed when FK506 or cyclosporin A was present following withdrawal of serum from the culture medium. In a second series of experiments, FK506 increased the survival of dopamine neurons when added only to a hibernation medium in which donor tissue pieces were stored for 7 days prior to preparation of the cultures. In a third set of experiments, we investigated the effects of FK506 and cyclosporin A on the survival of grafted rat embryonic dopamine neurons. When FK506 or cyclosporin A was present during tissue preparation and in the final mesencephalic cell suspension used for grafting, the survival of TH-immunoreactive neurons implanted in the striatum increased to around 185% of control values. In contrast, treatment of graft recipient rats, but not the graft suspension itself, with immunosuppressive doses of FK506 or cyclosporin A did not augment the survival of grafted TH-immunoreactive neurons. We conclude that administration of FK506 during storage of embryonic mesencephalic tissue and FK506 or cyclosporin A during preparation of nigral cell suspensions used for grafting can increase the survival of grafted embryonic dopamine neurons.

Publishing year

2000

Language

English

Pages

94-101

Publication/Series

Experimental Neurology

Volume

164

Issue

1

Document type

Journal article

Publisher

Elsevier

Topic

  • Neurology

Keywords

  • cell death
  • cyclosporin A
  • dopamine
  • FK506
  • immunophilin ligand
  • intracerebral transplantation
  • Parkinson's disease

Status

Published

ISBN/ISSN/Other

  • ISSN: 0014-4886