Neuroprotective Effects of 3[alpha]-Acetoxyeudesma-1,4(15),11(13)-trien-12,6[alpha]-olide Against Dopamine-Induced Apoptosis in the Human Neuroblastoma SH-SY5Y Cell Line

• Published in: Neurochemical research 2011-11, Vol.36 (11), p.1991
• Main Authors: Koo, Uk, Nam, Kung-woo, Ham, Ahrom, Lyu, Dahyun, Kim, Bora, Lee, Sung-jin, Kim, Kyeong Ho, Oh, Ki-bong, Mar, Woongchon, Shin, Jongheon
• Format: Article
• Language: English
• ISSN: 0364-3190; 1573-6903
• DOI: 10.1007/s11064-011-0523-1

Dopamine (DA), as a neurotoxin, can elicit severe Parkinson's disease-like syndrome by elevating intracellular reactive oxygen species (ROS) levels and apoptotic activity. We examined the inhibitory effects of 3α-acetoxyeudesma-1,4(15),11(13)-trien-12,6α-olide (AETO), purified from the leaves of Laurus nobilis L., on DA-induced apoptosis and α-synuclein (α-syn) formation in dopaminergic SH-SY5Y cells. AETO decreased the active form of caspase-3 and the levels of p53, which were accompanied by increased levels of Bcl-2 in a dose-dependent manner. Flow cytometric and Western blot analysis showed that AETO significantly inhibited DA-induced apoptosis along with suppression of intracellular tyrosinase activity, ROS generation, quinoprotein, and α-syn formation (P < 0.01). These results indicate that AETO inhibited DA-induced apoptosis, which is closely related to the suppression of intracellular tyrosinase activity and the formation of α-syn, ROS, and quinoprotein in SH-SY5Y cells.[PUBLICATION ABSTRACT]