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Chemical composition, aroma evaluation, and inhibitory activity towards acetylcholinesterase of essential oils from Gynura bicolor DC.

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Abstract

The compositions of the essential oils obtained from leaves and stems of Gynura bicolor DC. were analyzed by GC–MS. One hundred eight components of these oils were identified. (E)-β-caryophyllene (31.42 %), α-pinene (17.11 %), and bicyclogermacrene (8.09 %) were found to be the main components of the leaf oil, while α-pinene (61.42 %), β-pinene (14.39 %), and myrcene (5.10 %) were the major constituents of the stem oil. We found 73 previously unidentified components in these oils from G. bicolor. The oils were also subjected to odor evaluation. Eleven and 12 aroma-active compounds were detected in the leaf and stem oils, respectively. The abilities of these oils to inhibit acetylcholinesterase (AChE) activity were determined. The sesquiterpenoids in the oils were found to inhibit AChE activity more strongly than the monoterpenoids in the oils did. It was suggested that the three main components in each essential oil act synergistically against AChE activity. These results show that the essential oils obtained from G. bicolor are a good dietary source of AChE activity inhibition.

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Authors and Affiliations

  1. Department of Applied Chemistry, Faculty of Science and Engineering, Kinki University (Kindai University), 3-4-1 Kowakae, Higashiosaka, Osaka, 577-8502, Japan

    Mitsuo Miyazawa, Hiroshi Nakahashi, Atsushi Usami & Naoki Matsuda

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  1. Mitsuo Miyazawa
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  2. Hiroshi Nakahashi
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  3. Atsushi Usami
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  4. Naoki Matsuda
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Correspondence to Mitsuo Miyazawa.

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Miyazawa, M., Nakahashi, H., Usami, A. et al. Chemical composition, aroma evaluation, and inhibitory activity towards acetylcholinesterase of essential oils from Gynura bicolor DC.. J Nat Med 70, 282–289 (2016). https://doi.org/10.1007/s11418-015-0961-1

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  • DOI: https://doi.org/10.1007/s11418-015-0961-1

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