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- W1964963114 abstract "In the present studies, we used a non-selective melanocortin MC3/4 receptor agonist (HP228) and a novel selective melanocortin MC4 receptor (MC4-R) agonist (MK-cpd1) to study the cardiovascular, temperature, locomotor and feeding responses to melanocortin receptor stimulation in comparison to sibutramine in rats instrumented with a telemetry transmitter. Moreover, norepinephrine turnover rates in heart and brown adipose tissue were determined. HP228 (1, 3 and 10mg/kg, i.p.) reduced 24h food intake dose-dependently and increased heart rate and mean arterial pressure (maximal differences: +60+/-8beats/min and +8+/-1mmHg, means+/-S.E.M., p<0.001 and p<0.01, respectively). After 10mg/kg HP228 showed a three-fold increase in norepinephrine turnover in the heart. The selective MC4-R agonist MK-cpd1 tended to decrease 24h food intake only at the highest dose tested (10mg/kg, i.p., p=0.06) and increased both heart rate (+17+/-4 and +22+/-5beats/min at 3 and 10mg/kg, p<0.01) and mean arterial pressure (+4+/-1mmHg at 10mg/kg, p<0.05). Sibutramine reduced food intake at all doses tested (1, 3 and 10mg/kg, i.p.). It did not change mean arterial pressure significantly, and increased heart rate only at the highest dose tested (+36+/-6beats/min, p<0.05). If also observed in humans, the pharmacological profile of MC4-R agonists would not offer a significant therapeutic advantage over currently used appetite suppressants such as sibutramine." @default.
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- W1964963114 date "2006-02-01" @default.
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- W1964963114 title "Cardiovascular responses to melanocortin 4-receptor stimulation in conscious unrestrained normotensive rats" @default.
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- W1964963114 doi "https://doi.org/10.1016/j.peptides.2005.01.026" @default.
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