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- W2003128195 abstract "Obesity is a costly, deadly public health problem for which new treatments are needed. Individual differences in meal pattern have been proposed to have a role in obesity risk. The present study tested the hypothesis that (i) the microstructure of chronic high-fat diet intake differs between genetically selected diet-induced obesity (DIO) and diet-resistant (DR) rats, and (ii) central administration of urocortin 2 (Ucn 2), a corticotropin-releasing factor type 2 agonist, decreases high-fat diet intake not only in lean DR rats, but also in obese DIO rats. Male, selectively bred DIO and DR rats (n=10/genotype) were chronically fed a high-fat diet. Food and water intake as well as ingestion microstructure were then compared under baseline conditions and following third intracerebroventricular injection of Ucn 2 (0, 0.1, 0.3, 1, 3 μg). Irrespective of genotype, Ucn 2 reduced nocturnal food intake with a minimum effective dose of 0.3 μg, suppressing high-fat diet intake by ∼40% at the 3 μg dose. Ucn 2 also made rats of both genotypes eat smaller and briefer meals, including at doses that did not reduce drinking. Obese DIO rats ate fewer but larger meals than DR rats, which they ate more quickly and consumed with two-third less water. Unlike leptin and insulin, Ucn 2 retains its full central anorectic efficacy to reduce high-fat diet intake even in obese, genetically prone DIO rats, which otherwise show a ‘gorging’ meal pattern. These results open new opportunities of investigation toward treating some forms of DIO." @default.
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- W2003128195 date "2013-03-12" @default.
- W2003128195 modified "2023-10-16" @default.
- W2003128195 title "Centrally administered urocortin 2 decreases gorging on high-fat diet in both diet-induced obesity-prone and -resistant rats" @default.
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- W2003128195 doi "https://doi.org/10.1038/ijo.2013.22" @default.
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