Abstract：
:The rat mutant dystonic displays an autosomal recessive neurological disease characterized by slow, twisting movements of the limbs and trunk. Rats displaying clinical signs also show a decreased behavioral response to the dopaminergic blocker, haloperidol. Investigation of the development of the cataleptic response to haloperidol in the dystonic (dt) rat indicated that the response of the dt rat in the bar test is similar to that of normal littermates until after the appearance of clinical symptoms in the mutants on postnatal day 10. Mutant rats did not differ from their normal littermates in response to another cataleptic agent, morphine. Assessment of the integrity of the nigrostriatal dopamine (DA) system did not indicate the presence of any degenerative process or of any alterations in DA metabolism. No reliable differences were found between normal and dt rats in striatal DA levels or turnover rates; in DA levels in response to gamma-hydroxybutyrolactone; or in the number and affinity of striatal DA muscarinic acetylcholine receptors. Nor did qualitative light microscopic examination of Golgi-impregnated tissue from dt rats indicate the presence of any morphological abnormalities in the striatum. These findings suggest that dystonic symptoms can occur in the absence of an alteration in striatal DA metabolism and that the dt rat may have a defect in a pathway efferent to the striatum.
journal_name
Brain Resjournal_title
Brain researchauthors
McKeon TW,Lorden JF,Oltmans GA,Beales M,Walkley SUdoi
10.1016/0006-8993(84)90920-xsubject
Has Abstractpub_date
1984-08-06 00:00:00pages
89-96issue
1eissn
0006-8993issn
1872-6240pii
0006-8993(84)90920-Xjournal_volume
308pub_type
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