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• W1992599852 abstract "We studied the sequential changes in second messenger systems in the striatum and substantia nigra (SN) after 6-hydroxydopamine lesions of the medial forebrain bundle in rats. The animals were unilaterally lesioned in the medial forebrain bundle and the brains were analyzed at 1, 2, 4 and 8 weeks postlesion. [3H]Phorbol-12, 13-dibutyrate (PDBu), [3H]forskolin and [3H]rolipram were used to label protein kinase C (PKC), adenylyl cyclase and calcium/calmodulin-independent cyclic-AMP phosphodiesterase, respectively. The degeneration of nigrostriatal pathway produced a significant increase in [3H]PDBu binding in the ventromedial part of the ipsilateral striatum from 2 to 8 weeks postlesion. In the contralateral side, [3H]PDBu binding showed a transient increase in the SN only 4 weeks after lesioning. [3H]Forskolin binding showed a significant increase in the ipsilateral and contralateral striatum from 2 to 4 weeks postlesion. In the ipsilateral SN, a significant increase in [3H]forskolin binding was observed at 4 weeks after lesioning. However, no significant change in [3H]forskolin binding was observed in the contralateral SN during postlesion. On the other hand, [(3)H]rolipram binding showed no conspicuous alteration in the brain during postlesion. These results demonstrate that rats made hemiparkinsonism by unilateral 6-hydroxydopamine injection have a significant increase in [3H]PDBu and [3H]forskolin binding in the striatum and/or SN, whereas no significant change in [3H]rolipram binding is observed in these areas during postlesion. Our findings also suggest that the increase in [3H]forskolin binding is more pronounced than that in [3H]PDBu binding in the brain after unilateral 6-hydroxydopamine injection. Thus, our studies may provide valuable information concerning degeneration of the nigrostriatal pathway such as Parkinson's disease." @default.
• W1992599852 created "2016-06-24" @default.
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• W1992599852 date "1999-08-01" @default.
• W1992599852 modified "2023-09-23" @default.
• W1992599852 title "Alterations of second messenger systems in the rat brain after 6-hydroxydopamine lesions of the medial forebrain bundle" @default.
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• W1992599852 doi "https://doi.org/10.1016/s0928-0987(99)00017-2" @default.
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