Journal
BIOORGANIC & MEDICINAL CHEMISTRY LETTERS
Volume 21, Issue 7, Pages 2155-2159Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.bmcl.2011.01.072
Keywords
Lobophytum compactum; Lobocompactol A; Lobocompactol B; Cytotoxic activity; Oxygen radical absorbance capacity
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Funding
- Vietnam National Foundation for Science & Technology Development [104.01.30.09]
- Ministry of Education, Science and Technology, Republic of Korea [2009-0093815]
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Two new diterpenes, lobocompactols A (1) and B (2), and five known compounds (3-7) were isolated from the methanol extract of the soft coral Lobophytum compactum using combined chromatographic methods and identified based on NMR and MS data. Each compound was evaluated for cytotoxic activity against A549 (lung) and HL-60 (acute promyelocytic leukemia) human cancer cell lines. Among them, compound 5 exhibited strong cytotoxic activity against the A549 cell line with an IC(50) of 4.97 +/- 0.06 mu M. Compounds 3, 4, and 7 showed moderate activity with IC(50) values of 23.03 +/- 0.76, 31.13 +/- 0.08, and 36.45 +/- 0.01 mu M, respectively. The cytotoxicity of 5 on the A549 cells was comparable to that of the positive control, mitoxantrone (MX). All compounds exhibited moderate cytotoxicity against the HL-60 cell line, with IC(50) values ranging from 17.80 +/- 1.43 to 59.06 +/- 2.31 mu M. Their antioxidant activity was also measured using oxygen radical absorbance capacity method, compounds 1 and 2 exhibiting moderate peroxyl radical scavenging activity of 1.4 and 1.3 mu M Trolox equivalents, respectively, at a concentration of 5 mu M. (C) 2011 Elsevier Ltd. All rights reserved.
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