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Neuroprotective principles from Gastrodia elata
Nai-Kuei Huang1, Yijuang Chern, Jim-Min Fang
1National Research Institute of Chinese Medicine, Taipei 112, Taiwan, Republic of China, Institute of Biomedical Sciences, Academia Sinica, Nankang, Taipei 115, Taiwan, Republic of China.
Journal of Natural Products
|March 27, 2007
Summary
This study screened neuroprotective compounds from Gastrodia elata, identifying two potent compounds that prevent neuronal apoptosis. These compounds show promise for treating ischemic/hypoxic brain injury.
Area of Science:
- Neuroscience
- Pharmacology
- Traditional Chinese Medicine
Background:
- Ischemic and hypoxic conditions induce neuronal apoptosis, contributing to brain injury.
- Gastrodia elata is a traditional Chinese medicine with potential neuroprotective properties.
Purpose of the Study:
- To screen for neuroprotective compounds from Gastrodia elata rhizomes.
- To evaluate the efficacy of isolated compounds in an in vitro model of neuronal apoptosis.
Main Methods:
- Established an in vitro model of neuronal apoptosis using serum-deprived PC12 cells.
- Utilized chromatography to isolate active compounds from Gastrodia elata extract.
- Assessed neuroprotective effects and adenosine A2A receptor binding affinity of isolated compounds.
Main Results:
- Identified two active compounds: bis(4-hydroxybenzyl)sulfide and N6-(4-hydroxybenzyl)adenine riboside.
- Both compounds demonstrated potent, concentration-dependent prevention of PC12 cell apoptosis.
- N6-(4-hydroxybenzyl)adenine riboside showed significant activity with an EC50 of 3.7 x 10-8 M.
Conclusions:
- Gastrodia elata contains compounds with significant neuroprotective activity against apoptosis.
- N6-(4-hydroxybenzyl)adenine riboside is a potent neuroprotective agent, potentially acting via adenosine A2A receptor interactions.
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