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논문 기본 정보

자료유형
학술저널
저자정보
Myung Chang-Seon (College of Pharmacy, Chungnam National University) Kim Bom-Taeck (Department of Family Practice and Community Health, Ajou University School of Medicine) Choi Si Ho (Department of Pharmacology, BK Project of Medical Science, Yonsei University College of Medicine) Song Gyu Yong (College of Pharmacy, Chungnam National University) Lee Seok Yong (College of Pharmacy, Sungkyunkwan University) Jahng Jeong Won (Department of Pharmacology, BK Project of Medical Science, Yonsei University College of Medicine)
저널정보
대한약학회 Archives of pharmacal research : a publication of the Pharmaceutical Society of Korea Archives of pharmacal research : a publication of the Pharmaceutical Society of Korea 제28권 제6호
발행연도
2005.1
수록면
716 - 721 (6page)

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Fluoxetine is an anorexic agent known to reduce food intake and weight gain. However, the molecular mechanism by which fluoxetine induces anorexia has not been well-established. We examined mRNA expression levels of neuropeptide Y (NPY) and proopiomelanocortin (POMC) in the brain regions of rats using RT-PCR and in situ hybridization techniques after 2 weeks of administering fluoxetine daily. Fluoxetine persistently suppressed food intake and weight gain during the experimental period. The pair-fed group confirmed that the reduction in body weight in the fluoxetine treated rats resulted primarily from decreased food intake. RT-PCR analyses showed that mRNA expression levels of both NPY and POMC were markedly reduced by fluoxetine treatment in all parts of the brain examined, including the hypothalamus. POMC mRNA in situ signals were significantly decreased, NPY levels tended to increase in the arcuate nucleus (ARC) of fluoxetine treated rats (compared to the vehicle controls). In the pair-fed group, NPY mRNA levels did not change, but the POMC levels decreased (compared with the vehicle controls). These results reveal that the chronic administration of fluoxetine decreases expression levels in both NPY and POMC in the brain, and suggests that fluoxetine-induced anorexia may not be mediated by changes in the ARC expression of either NPY or POMC. It is possible that a fluoxetine raised level of 5-HT play an inhibitory role in the orectic action caused by a reduced expression of ARC POMC ($\alpha$-MSH).

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