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Natural Product Research
Formerly Natural Product Letters
Volume 35, 2021 - Issue 24
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Research Articles

Anti-inflammatory xenicane-type diterpenoid from the intertidal brown seaweed Sargassum ilicifolium

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Pages 5699-5709 | Received 30 May 2020, Accepted 04 Sep 2020, Published online: 30 Sep 2020
 

Abstract

Chemical analysis of the organic extract from intertidal brown seaweed Sargassum ilicifolium (family Sargassaceae) characterised an undescribed xenicane-type diterpenoid sargilicixenicane, elucidated as 3-(17-hydroxy-14-methylhept-13-en-10-yl)-6-methylhexahydro-1H-cyclonona[c]furan-4,19-diyl diacetate (compound 1). The studied compound exhibited prospective free radical quenching potential (IC50 1.2-1.4 mM) in comparison with commercial antioxidant (α-tocopherol, IC50 > 1.40 mM). Attenuation property of sargilicixenicane against pro-inflammatory enzyme, 5-lipoxygenase (IC50 4.70 mM) was comparable with that displayed by the non-steroidal anti-inflammatory agent ibuprofen (IC50 4.51 mM). Greater selectivity index displayed by the studied xenicane-type diterpenoid (1.42) than that exhibited by ibuprofen (0.44) recognised the selective attenuation potential of the former against the inducible cyclooxygenase-2 and 5-lipoxygenase enzymes. Higher electronic parameters (topological polar surface area, 82.06) and balanced hydrophobic-hydrophilic property (octanol-water partition coefficient 2.94) coupled with docking score (-11.17 kcal mol−1) and lower binding energy (-9.61 kcal mol−1) with the active site of 5-lipoxygenase supported the significant anti-inflammatory properties of the studied xenicane-type diterpenoid.

Graphical Abstract

Disclosure statement

No potential conflict of interest was reported by the author.

Additional information

Funding

This work was supported by the Indian Council of Agricultural Research-Central Marine Fisheries Research Institute (ICAR-CMFRI), India under the project titled as “Development of Bioactive Pharmacophores from Marine Organisms” (grant number MBT/HLT/SUB23). The authors thank the Director, ICAR-CMFRI, and Head, ICAR-CMFRI for guidance and support.

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