Grafts modulate dopamine transporters of the non-lesioned striatum.
The effect of intraventricular fetal mesencephalic grafts placed in the previously 6-hydroxydopamine (6-OHDA) lesioned striatum on the kinetics of [3H]dopamine (DA) uptake into striatal synaptosomes prepared from the non-lesioned (contralateral) striatum was studied in rats. Using WIN 35,065 as specific [3H]DA uptake inhibitor, the equilibrium dissociation constant (Km) of [3H]DA uptake into synaptosomes of the non-lesioned (contralateral) striatum did not differ between grafted and nongrafted controls 7 months after grafting. However, the maximal rate of specific [3H]DA uptake (Vmax) was markedly decreased in the non-lesioned striatum of grafted animals. This result indicates that fetal mesencephalic grafts reduce the [3H]DNA uptake in the non-lesioned (contralateral) striatum by reducing the number of functional DA transporters.
Schäfer
U
U
Institute of Pharmacology and Toxicology, Medical Faculty (Charité), Humboldt University at Berlin, Germany.
Reum
T
T
Schönfuss
D
D
Marburger
A
A
Morgenstern
R
R
D000704:Analysis of Variance; D000818:Animals; D002352:Carrier Proteins / Q000378:metabolism*; D003042:Cocaine / Q000031:analogs & derivatives / Q000494:pharmacology; D003342:Corpus Striatum / Q000378:metabolism* / Q000601:surgery; D004298:Dopamine; D050483:Dopamine Plasma Membrane Transport Proteins; D018765:Dopamine Uptake Inhibitors / Q000494:pharmacology; D016332:Fetal Tissue Transplantation / Q000502:physiology*; D007700:Kinetics; D008297:Male; D008562:Membrane Glycoproteins; D026901:Membrane Transport Proteins; D008636:Mesencephalon / Q000637:transplantation*; D009419:Nerve Tissue Proteins / Q000378:metabolism*; D051381:Rats; D017208:Rats, Wistar; D012016:Reference Values; D013574:Synaptosomes / Q000187:drug effects / Q000378:metabolism
D002352:Carrier Proteins; D050483:Dopamine Plasma Membrane Transport Proteins; D018765:Dopamine Uptake Inhibitors; D008562:Membrane Glycoproteins; D026901:Membrane Transport Proteins; D009419:Nerve Tissue Proteins; C021278:troparil; D003042:Cocaine; D004298:Dopamine