Abstract |
The Republic of Palau marine sponge Axinella sp. was found to be an exceptionally productive source of cell growth inhibitory substances. The strongly antineoplastic polyether macrocyclic lactones halichondrin B (1) and homohalichondrin B (2) were isolated in 1.2 x 10(-6)% and 5.4 x 10(-7)% yields, respectively. In addition to axinastatin 1 (3), two new and cytostatic (GI50 values of 0.35 to 0.0072 microgram/mL against six human cancer cell lines) cycloheptapeptides designated axinastatins 2 (4) and 3 (5) were discovered in 1.4 x 10(-6)% and 1.25 x 10(-6)% yields. Structures were elucidated by high-resolution FABMS and tandem MS/MS techniques augmented by high-field (400 and 500 MHz) 2D-NMR spectral analyses. The absolute configurations were established by a combination of hydrolysis, derivatization, and chiral gas chromatographic methods.
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Authors | G R Pettit, F Gao, R L Cerny, D L Doubek, L P Tackett, J M Schmidt, J C Chapuis |
Journal | Journal of medicinal chemistry
(J Med Chem)
Vol. 37
Issue 8
Pg. 1165-8
(Apr 15 1994)
ISSN: 0022-2623 [Print] United States |
PMID | 8164258
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't, Research Support, U.S. Gov't, Non-P.H.S., Research Support, U.S. Gov't, P.H.S.)
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Chemical References |
- Antineoplastic Agents
- Peptides, Cyclic
- axinastatin 2
- axinastatin 3
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Topics |
- Amino Acid Sequence
- Animals
- Antineoplastic Agents
(chemistry, isolation & purification)
- Colonic Neoplasms
(drug therapy)
- Female
- Humans
- Leukemia
(drug therapy)
- Lung Neoplasms
(drug therapy)
- Magnetic Resonance Spectroscopy
- Mass Spectrometry
- Molecular Sequence Data
- Molecular Structure
- Ovarian Neoplasms
(drug therapy)
- Peptides, Cyclic
(chemistry, isolation & purification, therapeutic use)
- Porifera
(chemistry)
- Spectrometry, Mass, Fast Atom Bombardment
- Tumor Cells, Cultured
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