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자료유형
학술저널
저자정보
Lee, Seon-A (College of Pharmacy, Chungbuk National University) Hwang, Ji-Sang (College of Pharmacy, Chungbuk National University) Han, Xiang Hua (College of Pharmacy, Chungbuk National University) Lee, Chul (College of Pharmacy, Chungbuk National University) Lee, Min-Hee (College of Pharmacy, Chungbuk National University) Choe, Sang-Gil (College of Pharmacy, Chungbuk National University) Hong, Seong-Su (Division of Biotechnology, College of Life Sciences and Biotechnology, Korea University) Lee, Dong-Ho (Division of Biotechnology, College of Life Sciences and Biotechnology, Korea University) Lee, Myung-Koo (College of Pharmacy, Chungbuk National University) Hwang, Bang-Yeon (College of Pharmacy, Chungbuk National University)
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 제31권 제6호
발행연도
2008.1
수록면
679 - 683 (5page)

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We have previously reported that piperine, a known piperidine alkaloid from Piper longum, competitively inhibited mouse brain MAO-A and MAO-B activities. Piperine also showed in vivo antidepressant-like activity against the tail suspension test. In the present study, we further expanded on the identification of MAO inhibitors from the fruit of P. longum. Activity-guided fractionation of a methylene chloride soluble extract led to the isolation of three known piperine-related compounds, methylpiperate (1), guineensine (2), and piperlonguminine (3). Of these, methylpiperate (1) and guineensine (2) showed significant MAO inhibitory activities with $IC_{50}$ values of 3.6 and $139.2\;{\mu}M$, respectively. Furthermore, methylpiperate (1) exhibited a selective inhibitory effect against MAO-B ($IC_{50}$ value: $1.6\;{\mu}M$) than MAO-A ($IC_{50}$ value: $27.1\;{\mu}M$). The kinetic study using the Lineweaver-Burk plots analysis suggested that methylpiperate (1) competitively inhibits MAO-A and MAO-B activities with the Ki values of 23.5 and $1.3\;{\mu}M$, respectively.

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