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자료유형
학술저널
저자정보
Jin, Chun-Mei (College of Pharmacy and Research Center for Bioresource and Health, Chungbuk National University) Lee, Jae-Joon (College of Pharmacy and Research Center for Bioresource and Health, Chungbuk National University) Yang, Yoo-Jung (College of Pharmacy and Research Center for Bioresource and Health, Chungbuk National University) Kim, Yu-Mi (College of Pharmacy and Research Center for Bioresource and Health, Chungbuk National University) Kim, Young-Kyoon (College of Forest Science, Kookmin University) Ryu, Shi-Yong (Korea Research Institute of Chemical Technology) Lee, Myung-Koo (College of Pharmacy and Research Center for Bioresource and Health, 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 제30권 제8호
발행연도
2007.1
수록면
984 - 990 (7page)

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The inhibitory effects of liriodenine, an aporphine isoquinoline alkaloid, on dopamine biosynthesis and L-DOPA-induced dopamine content increases in PC12 cells were investigated. Treatment of PC12 cells with 5-10 ${\mu}M$ liriodenine significantly decreased the intracellular dopamine content in a concentration-dependent manner ($IC_{50}$ value, 8.4 ${\mu}M$). Liriodenine was not cytotoxic toward PC12 cells at concentrations up to 20 ${\mu}M$. Tyrosine hydroxylase (TH) and aromatic L-amino acid decarboxylase (AADC) activities were inhibited by 10 ${\mu}M$ liriodenine to 20-70% and 10-14% of control levels at 3-12 h, respectively; TH activity was more influenced than AADC activity. The levels of TH mRNA, intracellular cyclic AMP and basal $Ca^{2+}$ concentration were also decreased by 10 ${\mu}M$ liriodenine. In addition, 10 ${\mu}M$ liriodenine reduced L-DOPA (20-100 ${\mu}M$)-induced increases in dopamine content. However, 10 ${\mu}M$ liriodenine resulted in a protective effect against L-DOPA (50-100 ${\mu}M$)-induced cytotoxicity. These results suggest that liriodenine regulates dopamine biosynthesis by partially reducing TH activity and TH gene expression and has protective effects against L-DOPA-induced cytotoxicity in PC12 cells.

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