Long-term survival of encapsulated GDNF secreting cells implanted within the striatum of parkinsonized rats
Several findings suggest that glial cell line-derived neurotrophic factor (GDNF) may be a useful tool to treat parkinsonism by acting as a neuroprotective and neurotrophic factor for dopaminergic neurotransmission systems. In the present study, we implanted alginate-poly-L-lysine-alginate microcapsu...
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Published in | International journal of pharmaceutics Vol. 343; no. 1; pp. 69 - 78 |
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Main Authors | , , , , , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Amsterdam
Elsevier B.V
01.10.2007
Elsevier |
Subjects | |
Online Access | Get full text |
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Summary: | Several findings suggest that glial cell line-derived neurotrophic factor (GDNF) may be a useful tool to treat parkinsonism by acting as a neuroprotective and neurotrophic factor for dopaminergic neurotransmission systems. In the present study, we implanted alginate-poly-L-lysine-alginate microcapsules containing immobilized Fischer rat 3T3 fibroblasts transfected to produce GDNF
in vitro into the striatum of 6-hydroxydopamine (6-OHDA) lesioned rats. Microencapsulated GDNF secreting cells were stable for at least 3 weeks
in vitro. Intrastriatal implantation of microencapsulated GDNF secreting cells into 6-OHDA lesioned rats resulted in a decrease in apomorphine-induced rotations by 84%, 64%, 84%, 60% and 52% (2, 5, 8, 16 and 24 weeks, respectively) with respect to the value before implantation and with respect to the value obtained from the empty microcapsule implanted-group at each time point. Six months after transplantation, immunohistochemical detection of GDNF revealed strong immunoreactivity in the striatal tissue surrounding the microcapsules in the absence of tissue damage due to microcapsule implantation. No changes in the levels of dopamine and its metabolites or of tyrosine hydroxylase immunoreactivity were detected in the striatum. In summary, the implantation of microencapsulated GDNF secreting cells allows the delivery of this molecule into the rat striatum for at least 6 months and results in substantial behavioral improvement. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0378-5173 1873-3476 |
DOI: | 10.1016/j.ijpharm.2007.05.027 |