title: Long-term survival of encapsulated GDNF secreting cells implanted within the striatum of parkinsonized rats.
abstract: 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.
authors.affiliation: Departamento de Farmacología, Universidad del País Vasco, E-48940 Leioa, Vizcaya, Spain.
authors.forename: Laura
authors.initials: L
authors.lastname: Grandoso
authors.forename: Sara
authors.initials: S
authors.lastname: Ponce
authors.forename: Ivan
authors.initials: I
authors.lastname: Manuel
authors.forename: Aurora
authors.initials: A
authors.lastname: Arrúe
authors.forename: Jose A
authors.initials: JA
authors.lastname: Ruiz-Ortega
authors.forename: Isabel
authors.initials: I
authors.lastname: Ulibarri
authors.forename: Gorka
authors.initials: G
authors.lastname: Orive
authors.forename: Rosa M
authors.initials: RM
authors.lastname: Hernández
authors.forename: Alicia
authors.initials: A
authors.lastname: Rodríguez
authors.forename: Rafael
authors.initials: R
authors.lastname: Rodríguez-Puertas
authors.forename: Mercedes
authors.initials: M
authors.lastname: Zumárraga
authors.forename: Gurutz
authors.initials: G
authors.lastname: Linazasoro
authors.forename: Jose Luis
authors.initials: JL
authors.lastname: Pedraz
authors.forename: Luisa
authors.initials: L
authors.lastname: Ugedo
mesh_terms: D015102:3,4-Dihydroxyphenylacetic Acid / Q000378:metabolism; D000818:Animals; D001522:Behavior, Animal / Q000187:drug effects; D002460:Cell Line; D002470:Cell Survival; D003342:Corpus Striatum / Q000187:drug effects / Q000378:metabolism; D004298:Dopamine / Q000378:metabolism; D004339:Drug Compounding; D016503:Drug Delivery Systems; D005347:Fibroblasts / Q000166:cytology / Q000378:metabolism; D051100:Glial Cell Line-Derived Neurotrophic Factor / Q000008:administration & dosage* / Q000493:pharmacokinetics / Q000627:therapeutic use; D006719:Homovanillic Acid / Q000378:metabolism; D007980:Levodopa / Q000378:metabolism; D008297:Male; D018696:Neuroprotective Agents / Q000008:administration & dosage* / Q000493:pharmacokinetics / Q000627:therapeutic use; D010300:Parkinson Disease / Q000188:drug therapy* / Q000378:metabolism / Q000503:physiopathology; D051381:Rats; D017207:Rats, Sprague-Dawley
chemical_list: C495041:Gdnf protein, rat; D051100:Glial Cell Line-Derived Neurotrophic Factor; D018696:Neuroprotective Agents; D015102:3,4-Dihydroxyphenylacetic Acid; D007980:Levodopa; D004298:Dopamine; D006719:Homovanillic Acid