Cited by 262Synthesis and Biological ActivityCancer therapeutics and mechanismsBioactive Compounds and Antitumor Agents

Ecteinascidin-743 (ET-743), a natural marine compound, with a unique mechanism of action

Erba, E, Bergamaschi, D, Bassano, L, Damia, G, Ronzoni, S, Faircloth, G.T, D'Incalci, M·2001·European Journal of Cancer

Abstract

The mode of action of Ecteinascidin-743 (ET-743), a marine tetrahydroisoquinoline alkaloid isolated from Ecteinascidia turbinata, which has shown very potent antitumour activity in preclinical systems and encouraging results in Phase I clinical trials was investigated at a cellular level. Both SW620 and LoVo human intestinal carcinoma cell lines exposed for 1 h to ET-743 progress through S phase more slowly than control cells and then accumulate in the G2M phase. The sensitivity to ET-743 of G1 synchronised cells was much higher than that of cells synchronised in S phase and even higher than that of cells synchronised in G2M. ET-743 concentrations up to four times higher than the IC(50) value caused no detectable DNA breaks or DNA-protein cross-links as assessed by alkaline elution techniques. ET-743 induced a significant increase in p53 levels in cell lines expressing wild-type (wt) (p53). However, the p53 status does not appear to be related to the ET-743 cytotoxic activity as demonstrated by comparing the drug sensitivity in p53 (-/-) or (+/+) mouse embryo fibroblasts and in A2780 ovarian cancer cells or the A2780/CX3 sub-line transfected with a dominant-negative mutant TP53. The cytotoxic potency of ET-743 was comparatively evaluated in CHO cell lines proficient or deficient in nucleotide excision repair (NER), and it was found that ET-743 was approximately 7-8 times less active in ERCC3/XPB and ERCC1-deficient cells than control cells. The findings that G1 phase cells are hypersensitive and that NER-deficient cells are resistant to ET-743 indicate that the mode of action of ET-743 is unique and different from that of other DNA-interacting drugs.

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Crossref · 10.1016/s0959-8049(00)00357-9

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  • ET-743 exerts anti-proliferative effects by selective alkylation of guanine residues in the DNA minor groove.

    “Moreover, ET-743, a tetrahydroisoquinilone alkaloid isolated from tunicate Ecteinascidia turbinata entered phase I clinical trials [62], since it exerts anti-proliferative effects by selective alkylation of guanine residues in the DNA minor groove [63], whereas dolastatin 10, a member of a peptide family isolated from the mollusk Dolabella auricularia, reached phase II clinical trials [64], based”

    From Marine Natural Products: A Source of Novel Anticancer Drugs (2019) · cites this paper as [63]

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Authors
Erba, E., Bergamaschi, D., Bassano, L., Damia, G., Ronzoni, S., Faircloth, G. T., & D'Incalci, M.
Affiliations
  • Mario Negri Institute for Pharmacological Research (IT)
  • Rayonix (United States) (US)
Corresponding author
Erba, E
Venue
European Journal of Cancer
Publisher
Elsevier BV
Published
2001-01
Volume
37
Issue
1
Pages
97-105
ISSN
0959-8049 (ISSN-L)
OpenAlex
W2153737617
Cited by
262
References
28
Citations by year
2026: 4 · 2025: 4 · 2024: 7 · 2023: 7 · 2022: 8 · 2021: 7 · 2020: 6 · 2019: 6 · 2018: 6 · 2017: 8 · 2016: 10 · 2015: 21 · 2014: 19 · 2013: 9 · 2012: 4
FWCI
6.19
Type
journal article
Language
en
Open access
closed
Locations
  • European Journal of Cancer (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Cancer Research Institute
  • Associazione Italiana per la Ricerca sul Cancro
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Synthesis and Biological Activity
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Cancer therapeutics and mechanisms
  • Life Sciences › Pharmacology, Toxicology and Pharmaceutics › Toxicology › Bioactive Compounds and Antitumor Agents
Keywords
trabectedin, Ecteinascidia turbinata, cell cycle arrest, p53, nucleotide excision repair, ERCC1, DNA damage, DNA-protein crosslinks, ovarian cancer cell lines, drug resistance
MeSH terms
Trabectedin, Cell Cycle, Cell Division, Colonic Neoplasms, Dioxoles, DNA Damage, DNA, Neoplasm, Drug Screening Assays, Antitumor, Humans, Isoquinolines, Tumor Cells, Cultured, Tumor Suppressor Protein p53, Cyclins, Antineoplastic Agents, Alkylating, Tetrahydroisoquinolines

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