Chronic amphetamine treatment increases striatal calmodulin in rats.
نویسندگان
چکیده
A radioimmunoassay was developed to measure calmodulin in striatum from rats treated with one dose or repeated injections of amphetamine. Chronic, but not acute, amphetamine treatment resulted in a significant increase in total calmodulin levels in striatal homogenates. This effect may be linked to the behavioral sensitization which develops after chronic amphetamine treatments.
منابع مشابه
Repeated haloperidol increases both calmodulin and a calmodulin-binding protein in rat striatum.
Repeated treatment with the antipsychotic drug, haloperidol, leads to an increased behavioral sensitivity to dopamine agonists exhibited upon withdrawal from the drug. An increase in the particulate content of the endogenous Ca(2+)-binding protein, calmodulin, has been demonstrated after repeated treatment of rats with haloperidol. In this study, the anatomical specificity of the effect of repe...
متن کاملAlterations in calmodulin content and localization in areas of rat brain after repeated intermittent amphetamine.
To assess whether calmodulin (CaM) could have a role in the behavioral sensitization induced by repeated intermittent amphetamine, CaM content was determined in several brain areas from rats repeatedly administered saline or amphetamine. Rats were treated with amphetamine using an escalating dose paradigm and withdrawn for either 4 weeks (withdrawn group) or 30 min (non-withdrawn group). CaM co...
متن کاملStriatal acetylcholine release correlates with behavioral sensitization in rats withdrawn from chronic amphetamine.
Stimulant sensitization is defined as an enhancement of the behavioral response to drug after repeated drug exposure. We have examined the relation between the expression of behavioral sensitization and the release of the striatal neurotransmitters acetylcholine (ACh) and dopamine (DA). Rats were treated with amphetamine (4 mg/kg i.p., b.i.d.) for 12 days. The behavioral response to amphetamine...
متن کاملEnhanced amphetamine- and K+-mediated dopamine release in rat striatum after repeated amphetamine: differential requirements for Ca2+- and calmodulin-dependent phosphorylation and synaptic vesicles.
After cessation of repeated, intermittent amphetamine, we detected an emergent Ca2+-dependent component of amphetamine-induced dopamine release and an increase in calmodulin and Ca2+- and calmodulin-dependent protein kinase activity in rat striatum. This study examined the involvement of calmodulin-dependent protein kinase II (CaM kinase II) and synaptic vesicles in the enhanced Ca2+-dependent ...
متن کاملStriatal dopamine levels and changes in mitochondrial function following chronic 3-nitropropionic acid treatment in rats
An irreversible inhibitor of complex II in the mitochondria, 3-nitropropionic acid (3-NP), induces bilateral striatal lesions with many neuropathological features of Huntington’s disease (HD) in rats. It is widely used as a model of HD. Chronic systemic treatment of 3-NP for 4 days in rats (10, 15 and 20 mg/kg) caused a significant dose-dependent reduction in succinate dehydrogenase activity, w...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Brain research
دوره 384 2 شماره
صفحات -
تاریخ انتشار 1986