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J Nat Prod. 1995 Dec;58(12):1801-7.

Antitumor activity and stereochemistry of acetylenic alcohols from the sponge Cribrochalina vasculum.

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1
Division of Cancer Treatment, National Cancer Institute, Frederick, Maryland 21702-1201, USA.

Abstract

Antitumor bioassay-guided fractionation of the organic extract of the marine sponge Cribrochalina vasculum resulted in the isolation of several closely related cytotoxic acetylenic alcohols [1-8], the structures of which were assigned on the basis of chemical and spectral studies. 3-Hydroxyeicos-(4E)-en-1-yne[1], 3-hydroxydocosa-(4E,15Z)-dien-1-yne[2], 3-hydroxy-16-methyleicos-(4E)-en-1-yne[3], 3-hydroxy-19-methyleicos-(4E)-en-1-yne[4], 3-hydroxy-21-methyldocosa-(4E,15Z)-dien-1-yne [5], and 3-hydroxy-14-methyldocosa-(4E)-en-1-yne [6] are enantiomers of known compounds, while 3-hydroxyheneeicos-(4E)-en-1-yne [7] and 5-hydroxy-16-methyleicos-(3Z)-en-1-yne [8] are new metabolites isolated as minor components. The absolute configuration of C-3 in 1-7 and C-5 in 8 has been assigned as S using the modified Mosher's method. Compounds selected from this series showed selective in vitro antitumor activity against the H-522 non-small cell lung line and the IGROV-1 ovarian line. Synthetic racemic 1 demonstrated a modest dose-related therapeutic activity in a preliminary in vivo xenograft assay based on the latter cell line.

PMID:
8691203
DOI:
10.1021/np50126a001
[Indexed for MEDLINE]

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