The Journal of Neuroscience, December 15, 2001, 21(24):9888-9895
Functional Regeneration in a Rat Parkinson's Model after
Intrastriatal Grafts of Glial Cell Line-Derived Neurotrophic Factor and
Transforming Growth Factor
1-Expressing
Extra-Adrenal Chromaffin Cells of the Zuckerkandl's Organ
Emilio Fernandez
Espejo1,
M. Carmen
Gonzalez-Albo2,
Joao-Paulo
Moraes1,
Fadwa
El Banoua1,
Juan A.
Flores1, and
Isabel
Caraballo1
1 Departamento de Fisiologia Medica y Biofisica,
Universidad de Sevilla, E-41009 Sevilla, Spain, and
2 Instituto Cajal, Consejo Superior de Investigaciones
Cientificas, E-28002 Madrid, Spain
Intrabrain transplantation of chromaffin cell aggregates of the
Zuckerkandl's organ, an extra-adrenal paraganglion that has never been
tested for antiparkinsonian treatment, induced gradual improvement of
functional deficits in parkinsonian rats. These beneficial effects were
related to long survival of grafted cells, striatal reinnervation, and
enhancement of dopamine levels in grafted striatum. Grafted cells were
not dopaminergics, but they expressed glial cell line-derived
neurotrophic factor (GDNF) and transforming growth
factor-
1. These factors were detected in the host
striatal tissue, indicating that chromaffin cells secreted them after
grafting. Because glial cell line-derived neurotrophic factor
possesses neurorestorative properties over dopaminergic neurons, and
transforming growth factor-
1 is a cofactor that potentiates the neurotrophic actions of GDNF, functional regeneration was likely caused by the chronic trophic action of neurotrophic factors
delivered by long-surviving grafted cells. This work should stimulate
research on the clinical applicability of transplants of the
Zuckerkandl's organ in Parkinson's disease.
Key words:
Parkinson's disease; graft; Zuckerkandl's organ; extra-adrenal cell; adrenal cell; glial cell line-derived neurotrophic
factor; transforming growth factor-
1; stereology; 6-hydroxydopamine
Copyright © 2001 Society for Neuroscience 0270-6474/01/21249888-08$05.00/0