|
KMID : 0043319950180040271
|
|
Archives of Pharmacal Research
1995 Volume.18 No. 4 p.271 ~ p.276
|
|
|
Changes in the Distribution of Dopamine and it’s Metabolites in Streptozotocin-induced Diabetic Rat Striatum
|
|
Lim Dong-Koo
Lee Kyung-Min
|
|
|
Abstract
|
|
|
|
Changes in the distribution of dopamine and its metabolites, activities of monoamine oxidase, and dopamine uptake were studied inhyperglycemic rat striatum. The hyperglycemia was induced by the administration of streptozotocin (STZ, 40 mg/kg, i.p. for 3 days.). The levels of dihydroxyphenylacetic acid (DOPAC) and homovanillic acid were significantly decreased without change in dopamine level in the synatic cleft 14 days after STZ treatment. In the synaptosome, the dopamine level, however, was significanly increased after the treatment. But the DOPAC level in the synaptosome was decreased 14 days after the treatment. The affinity of dopamine uptake was significantly decreased without changes in the velocity 14 days after the treatment. However the response to uptqke inhibitor was unchanged. The striatal monoamine oxidase activities were also decreased in the hyperglycemic state. These results indicate that various parameters of striatal dopamine activities were decreased in the hyperglycemic rats. Furthermore, it suggests that the increase in dopamine level of synaptosome might be due to the decrease in the release of dopaine in hyperglycemic state.
|
|
|
KEYWORD
|
|
|
Hyperglycemia, Dopamine, distribution, Monoamine, oxidase activity, Dopamine uptake
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
  
|
|