Adenosine A2A receptor gene expression in the normal striatum and after 6-OH-dopamine lesion

Kaelin-Lang, A; Liniger, P; Probst, A; Lauterburg, T; Burgunder, J M (2000). Adenosine A2A receptor gene expression in the normal striatum and after 6-OH-dopamine lesion. Journal of neural transmission, 107(8-9), pp. 851-9. Wien: Springer 10.1007/s007020070037

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Adenosine A2A receptors are present on enkephalinergic medium sized striatal neurons in the rat and have an important function in the modulation of striatal output. In order to establish more accurately whether adenosine transmission is a generalized phenomenon in mammalian striatum we compared the A2A R expression in the mouse, rat, cat and human striatum. Secondly we compared the modulation of enkephalin gene expression and A2A receptor gene expression in rat striatal neurons after 6-OH-dopamine lesion of the substantia nigra. Hybridization histochemistry was performed with a 35S-labelled radioactive oligonucleotide probe. The results showed high expression of A2A adenosine receptor genes only in the medium-sized cells of the striatum in all examined species. In the rat striatum, expression of A2A receptors was not significantly altered after lesion of the dopaminergic pathways with 6-OH-dopamine even though enkephalin gene expression was up-regulated. The absence of a change in A2A receptor gene expression after 6-OH-dopamine treatment speaks against a dependency on dopaminergic innervation. The maintained inhibitory function of A2A R on motor activity in spite of dopamine depletion could be partly responsible for the depression of locomotor activity observed in basal ganglia disorders such as Parkinson's disease.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Department of Head Organs and Neurology (DKNS) > Clinic of Neurology

UniBE Contributor:

Kaelin, Alain

ISSN:

0300-9564

ISBN:

11041267

Publisher:

Springer

Language:

English

Submitter:

Factscience Import

Date Deposited:

04 Oct 2013 15:05

Last Modified:

04 May 2014 23:20

Publisher DOI:

10.1007/s007020070037

PubMed ID:

11041267

Web of Science ID:

000088951700001

URI:

https://boris.unibe.ch/id/eprint/28448 (FactScience: 120817)

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