Unilateral implantation of dopamine-loaded biodegradable hydrogel in the striatum attenuates motor abnormalities in the 6-hydroxydopamine model of hemi-parkinsonism

Karuppagounder S. Senthilkumar, Karuppagounder S. Saravanan, Goutam Chandra, Kizhakke M. Sindhu, A. Jayakrishnan, Kochupurackal P. Mohanakumar

Research output: Contribution to journalArticle

Abstract

Dopaminergic functional recovery following controlled release of dopamine from biodegradable polymer matrices implanted in the lesioned striatum was investigated in a hemiparkinsonian animal model. Significant dopamine depletion in the striatum ipsilateral to the side of infusion was observed in animals unilaterally infused with 6-hydroxydopamine (6-OHDA) in the substatia nigra. These animals displayed apomorphine-induced contralateral rotational behavior, when examined on the 16th day. Implantation of a controlled release delivery system (hydrogel obtained by mixing dextran dialdehyde cross-linked with gelatin) containing dopamine in the denervated striatum on the 1st day or the 18th day significantly abolished the apomorphine-induced contralateral rotational behavior in these animals. The recovery was visible for about 17 days, thereafter the behavioral bias reappeared. The present results indicate that dopamine released from the polymer matrices alleviates behavioral bias in experimental parkinsonism, implying use of such technologies as an alternative method for the treatment of Parkinson's disease. This approach is useful in reducing the oral dose of drugs that are with severe systemic effects, and that develop tolerance.

Original languageEnglish (US)
Pages (from-to)11-18
Number of pages8
JournalBehavioural Brain Research
Volume184
Issue number1
DOIs
StatePublished - Nov 22 2007
Externally publishedYes

Keywords

  • 6-Hydroxydopamine
  • Apomorphine
  • Controlled release
  • Dextran dialdehyde cross-linked gelatin hydrogel
  • Dopamine
  • Parkinson's disease
  • Rotational behavior
  • Striatal implantation

ASJC Scopus subject areas

  • Behavioral Neuroscience

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