Journal of Molecular Neuroscience

, Volume 42, Issue 1, pp 9–16 | Cite as

Limonoids from Dictamnus dasycarpus Protect Against Glutamate-induced Toxicity in Primary Cultured Rat Cortical Cells

  • Jeong Seon Yoon
  • Hyekyung Yang
  • Seung Hyun Kim
  • Sang Hyun Sung
  • Young Choong KimEmail author


In our previous report, four limonoids, obacunone, limonin, fraxinellone, and calodendrolide, isolated from Dictamnus dasycarpus showed significant neuroprotective activity against glutamate toxicity in primary cultured rat cortical cells. This study investigated neuroprotective mechanism of these compounds using the same in vitro culture system. These four compounds showed significant neuroprotective activity at the concentration of 0.1 μM. They effectively inhibited calcium influx and overproduction of cellular nitric oxide and reactive oxygen species accompanied by glutamate-induced neurotoxicity. In addition, these compounds significantly preserved mitochondrial membrane potential and activities of antioxidative enzymes. Our results showed that obacunone, limonin, fraxinellone, and calodendrolide significantly protect primary culture cortical cells against glutamate-induced toxicity by preserving the antioxidant defense system. These compounds might offer potential drug development candidate for various neurodegenerative diseases involved with glutamate.


Limonoids Neuroprotection Glutamate Antioxidants 



This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (2009-0075964).


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Copyright information

© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  • Jeong Seon Yoon
    • 1
  • Hyekyung Yang
    • 1
  • Seung Hyun Kim
    • 2
  • Sang Hyun Sung
    • 1
  • Young Choong Kim
    • 1
    Email author
  1. 1.College of Pharmacy and Research Institute of Pharmaceutical ScienceSeoul National UniversitySeoulSouth Korea
  2. 2.Institute for Life Science, Elcomscience Co. Ltd.SeoulSouth Korea

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