Document Detail


Transplantation of microencapsulated PC12 cells provides long-term improvement of dopaminergic functions.
MedLine Citation:
PMID:  9434887     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The purpose of this study is to examine if microencapsulated PC12 cells may provide long term effects to the hemiparkinsonian rats. A modified technique was used to encapsulate PC12 cells into gelled microspheres. We found that the PC12 cells can survive in the modified microcapsules in vitro. Most of the PC12 cells formed cluster 3 weeks after incubation. The PC12 cell-loaded microcapsules were also examined in vitro. Adult Sprague-Dawley rats, anesthetized with chloral hydrate, were injected unilaterally with 6-hydroxydopamine into the medial forebrain bundle. The effectiveness of this lesion was tested by measuring apomorphine or methamphetamine-induced rotation one month after lesioning. The unilaterally lesioned rats were transplanted with microencapsulated PC12 cells. Results showed that apomorphine and methamphetamine-induced rotations were greatly suppressed after transplantation. One year after the grafting, the animals were anesthetized with urethane for the voltammetric study. Low dose of KCl was directly injected into the grafted striatum through pressure microejection. We found that KCl-induced DA release, as measured by voltammetric techniques, was regenerated in the striatum. The animals were later sacrificed for histological examination. We found that capsules were present in the lesioned striatum one year after grafting. Most of the capsules contained no PC12 cell. However, some capsules were filled entirely with PC12 cells. Taken together, our data suggested that PC12 cells can survive in the capsule in vitro and may provide long-term dopaminergic effects to the hemiparkinsonian rats.
Authors:
Y Wang; S D Wang; S Z Lin; A L Chiou; L K Chen; J F Chen; F C Zhou
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The Chinese journal of physiology     Volume:  40     ISSN:  0304-4920     ISO Abbreviation:  Chin J Physiol     Publication Date:  1997 Sep 
Date Detail:
Created Date:  1998-02-26     Completed Date:  1998-02-26     Revised Date:  2009-08-12    
Medline Journal Info:
Nlm Unique ID:  7804502     Medline TA:  Chin J Physiol     Country:  TAIWAN    
Other Details:
Languages:  eng     Pagination:  121-9     Citation Subset:  IM    
Affiliation:
Department of Pharmacology, National Defense Medical Center, Taipei, Taiwan, ROC. yun@ndmc1.ndmctsgh.edu.tw
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MeSH Terms
Descriptor/Qualifier:
Animals
Apomorphine / pharmacology
Cell Survival / physiology
Cell Transplantation
Dopamine / metabolism,  physiology*
Dopamine Agonists / pharmacology
Dopamine Uptake Inhibitors / pharmacology
Drug Compounding
Immunohistochemistry
Methamphetamine / pharmacology
PC12 Cells
Rats
Rats, Sprague-Dawley
Stereotyped Behavior / drug effects
Tyrosine 3-Monooxygenase / metabolism
Chemical
Reg. No./Substance:
0/Dopamine Agonists; 0/Dopamine Uptake Inhibitors; 537-46-2/Methamphetamine; 58-00-4/Apomorphine; EC 1.14.16.2/Tyrosine 3-Monooxygenase

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