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- W2052816449 abstract "Groups of 5, 15, and 27-month-old rats were treated with reserpine (5 mg/kg IP) and killed after 1, 7, 14, and 21 days. Reserpine's effects on dopamine (DA) and serotonin (5HT) metabolism were studied in the striata and limbic areas, on the basis of changes in metabolite concentrations and a calculated index [delta(C/M)] expressing changes in the molar ratio between metabolite and parent monoamine. Twenty-four hours after drug treatment, when the two monoamines reached a new steady-state, about 10% of the normal concentration, there was evident enhancement in the metabolism of striatal DA, indicated by HVA levels and delta(C/M) changes. This increase was significantly lower in the senescent rats. In contrast with HVA, the levels of DOPAC were lowered in reserpinized rats. This effect, present in all three age groups, lasted up to 21 days in young and 14 days in adult and old rats. However, for this metabolite too, the delta(C/M) indicated an increase in its formation which was lower in 27-month-old rats. Similar effects were observed in limbic areas, but here the age-related differences were less evident. Serotonin metabolism was also increased by reserpine as indicated by the delta(C/M). This parameter was lower in young than in adult and old rats, at least in limbic area. Similarly, 5HIAA increased only in the senescent rats. These age-related differences were not evident in striata. In this rat population, aging apparently modified the compensatory metabolic responses of some dopaminergic and serotonergic systems. The direction of these changes, however, depends on the system and the brain region considered." @default.
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- W2052816449 date "1987-01-01" @default.
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- W2052816449 title "Age-related changes in metabolic responses to chronic monoamine depletion in central dopaminergic and serotonergic systems of rats treated with reserpine" @default.
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- W2052816449 doi "https://doi.org/10.1016/0197-4580(87)90059-5" @default.
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