PMID- 18989978 OWN - NLM STAT- MEDLINE DCOM- 20111129 LR - 20181113 IS - 1520-6025 (Electronic) IS - 0163-3864 (Print) IS - 0163-3864 (Linking) VI - 71 IP - 11 DP - 2008 Nov TI - Molecular-targeted antitumor agents. 19. Furospongolide from a marine Lendenfeldia sp. sponge inhibits hypoxia-inducible factor-1 activation in breast tumor cells. PG - 1854-60 LID - 10.1021/np800342s [doi] AB - A natural product chemistry-based approach was employed to discover small-molecule inhibitors of the important tumor-selective molecular target hypoxia-inducible factor-1 (HIF-1). Bioassay-guided isolation of an active lipid extract of a Saipan collection of the marine sponge Lendenfeldia sp. afforded the terpene-derived furanolipid furospongolide as the primary inhibitor of hypoxia-induced HIF-1 activation (IC(50) 2.9 muM, T47D breast tumor cells). The active component of the extract also contained one new cytotoxic scalarane sesterterpene and two previously reported scalaranes. Furospongolide blocked the induction of the downstream HIF-1 target secreted vascular endothelial growth factor (VEGF) and was shown to suppress HIF-1 activation by inhibiting the hypoxic induction of HIF-1alpha protein. Mechanistic studies indicate that furospongolide inhibits HIF-1 activity primarily by suppressing tumor cell respiration via the blockade of NADH-ubiquinone oxidoreductase (complex I)-mediated mitochondrial electron transfer. FAU - Liu, Yang AU - Liu Y AD - Department of Pharmacognosy and Research Institute of Pharmaceutical Sciences, School of Pharmacy, University of Mississippi, University, Mississippi 38677, USA. FAU - Liu, Rui AU - Liu R FAU - Mao, Shui-Chun AU - Mao SC FAU - Morgan, J Brian AU - Morgan JB FAU - Jekabsons, Mika B AU - Jekabsons MB FAU - Zhou, Yu-Dong AU - Zhou YD FAU - Nagle, Dale G AU - Nagle DG LA - eng GR - R01 CA098787/CA/NCI NIH HHS/United States GR - R56 CA098787-05A1/CA/NCI NIH HHS/United States GR - R56 CA098787/CA/NCI NIH HHS/United States GR - R01 CA098787-04/CA/NCI NIH HHS/United States GR - C06 RR014503/RR/NCRR NIH HHS/United States GR - CA98787/CA/NCI NIH HHS/United States GR - C06 RR-14503-01/RR/NCRR NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, U.S. Gov't, Non-P.H.S. DEP - 20081106 PL - United States TA - J Nat Prod JT - Journal of natural products JID - 7906882 RN - 0 (Antineoplastic Agents) RN - 0 (Furans) RN - 0 (Hypoxia-Inducible Factor 1, alpha Subunit) RN - 0 (VEGFA protein, human) RN - 0 (Vascular Endothelial Growth Factor A) RN - 0 (furospongolide) SB - IM MH - Animals MH - Antineoplastic Agents/chemistry/*isolation & purification/*pharmacology MH - Breast Neoplasms/metabolism MH - Drug Screening Assays, Antitumor MH - Female MH - Furans/chemistry/*isolation & purification/*pharmacology MH - Humans MH - Hypoxia-Inducible Factor 1, alpha Subunit/*antagonists & inhibitors MH - Marine Biology MH - Molecular Structure MH - Porifera/*chemistry MH - Vascular Endothelial Growth Factor A/drug effects PMC - PMC2893247 MID - NIHMS86561 EDAT- 2008/11/08 09:00 MHDA- 2011/12/13 00:00 PMCR- 2010/06/28 CRDT- 2008/11/08 09:00 PHST- 2008/11/08 09:00 [pubmed] PHST- 2011/12/13 00:00 [medline] PHST- 2008/11/08 09:00 [entrez] PHST- 2010/06/28 00:00 [pmc-release] AID - 10.1021/np800342s [doi] PST - ppublish SO - J Nat Prod. 2008 Nov;71(11):1854-60. doi: 10.1021/np800342s. Epub 2008 Nov 6.