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Mar Drugs. 2012 Oct;10(10):2222-33. doi: 10.3390/md10102222. Epub 2012 Oct 10.

Anti-human rhinoviral activity of polybromocatechol compounds isolated from the rhodophyta, Neorhodomela aculeata.

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1
Marine Chemomics Lab., Natural Medicine Center, Korea Institute of Science and Technology, Gangneung 210-340, Korea.

Abstract

An extract of the red alga, Neorhodomela aculeata, exhibited antiviral activity against human rhinoviruses. Bioassay-guided purification was performed to yield six compounds, which were subsequently identified as lanosol (1) and five polybromocatechols (2-6) by spectroscopic methods, including 1D and 2D NMR and mass spectrometric analyses. Structurally, all of these compounds, except compound 5, contain one or two 2,3-dibromo-4,5-dihydroxyphenyl moieties. In a biological activity assay, compound 1 was found to possess antiviral activity with a 50% inhibitory concentration (IC₅₀) of 2.50 μg/mL against HRV2. Compound 3 showed anti-HRV2 activity, with an IC₅₀ of 7.11 μg/mL, and anti-HRV3 activity, with an IC₅₀ of 4.69 μg/mL, without demonstrable cytotoxicity at a concentration of 20 μg/mL. Collectively, the results suggest that compounds 1 and 3 are candidates for novel therapeutics against two different groups of human rhinovirus.

KEYWORDS:

Neorhodomela aculeate; antiviral activity; human rhinovirus; polybromocatechol compounds; red alga

PMID:
23170079
PMCID:
PMC3497018
DOI:
10.3390/md10102222
[Indexed for MEDLINE]
Free PMC Article
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