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The radical scavenging activity of moracins: theoretical insights

journal contribution
posted on 20.11.2020, 04:52 by Quan Van Vo, NT Hoa
© The Royal Society of Chemistry. Moracins are natural products that have been isolated from different plants such as Artocarpus heterophyllus, Cassia fistula, Morus alba, and Morus mesozygia. Studies showed that moracins may have various advantageous physiological effects such as anticancer, anti-inflammatory, anticholinesterase and particularly antioxidant activities. Most of these bioactivities have not been studied systematically. In this study, the radical scavenging of a typical moracin (moracin M, MM) against HO and HOO radicals was evaluated by thermodynamic and kinetic calculations in the gas phase as well as in water and pentyl ethanoate solvents. It was found that the overall rate constants for the HO radical scavenging in the gas phase and the physiological environments are in the range of 1011 to 1010 M-1 s-1, respectively. For the HOO + MM reaction the rate constants are 4.10 × 107 and 3.80 × 104 M-1 s-1 in the polar and lipid media, respectively. It is important to notice that the single electron transfer pathway of the anion state (MM-O6′-) dominated the HOO radical scavenging in the aqueous solution, whereas in lipid medium the neutral MM exerted its activity by the formal hydrogen transfer mechanism. The HOO radical scavenging of MM is comparable to that of Trolox in lipid medium, whereas it is 315.4 times more active in the polar environment.

Funding

The research is funded by Vietnam National Foundation for Science and Technology Development (NAFOSTED) under grant number 104.06-2018.308.

History

Publication Date

06/10/2020

Journal

RSC Advances: an international journal to further the chemical sciences

Volume

10

Issue

60

Pagination

6p. (p. 36843-36848)

Publisher

Royal Society of Chemistry

ISSN

2046-2069

Rights Statement

The Author reserves all moral rights over the deposited text and must be credited if any re-use occurs. Documents deposited in OPAL are the Open Access versions of outputs published elsewhere. Changes resulting from the publishing process may therefore not be reflected in this document. The final published version may be obtained via the publisher’s DOI. Please note that additional copyright and access restrictions may apply to the published version.

Licence

Exports