6533b836fe1ef96bd12a154b
RESEARCH PRODUCT
Inhibition of intrinsic protein tyrosine kinase activity of EGF-receptor kinase complex from human breast cancer cells by the marine sponge metabolite (+)-aeroplysinin-1
Frank RinaldiMatthias-h. KreuterRobin LeakeArmin MaidhofWerner E. G. M�llerHeinz C. SchröderWolfgang Müller-kliesersubject
Protein kinase complexAcetonitrilesTime FactorsPhysiologyBlotting WesternBreast NeoplasmsBiologyBiochemistrySubstrate SpecificityMiceEpidermal growth factorCyclohexenesTumor Cells CulturedAnimalsHumansPhosphorylationTyrosineMolecular BiologyDose-Response Relationship DrugKinaseGeneral MedicineProtein-Tyrosine KinasesMolecular biologyPoriferaErbB ReceptorsBiochemistryCell cultureCancer cellPhosphorylationCalciumTyrosine kinaseCell Divisiondescription
1. (+)-Aeroplysinin-1, a naturally occurring tyrosine metabolite from the marine sponge Verongia aerophoba, was found to inhibit the phosphorylation of lipocortin-like proteins by a highly purified preparation of the epidermal growth factor (EGF) receptor-tyrosine protein kinase complex from MCF-7 breast carcinoma cells. 2. (+)-Aeroplysinin-1 blocked the EGF-dependent proliferation of both MCF-7 and ZR-75-1 human breast cancer cells and inhibited the ligand-induced endocytosis of the EGF receptor in vitro. 3. Treatment with aeroplysinin-1 in the concentration range at 0.25-0.5 microM resulted in a time- and dose-dependent total tumor cell death in vitro. 4. At a 10-fold higher concentration the compound did not reveal any cytostatic activity in normal human fibroblasts. 5. From these data we conclude that (+)-aeroplysinin-1 represents a compound which displays a strong anti-tumor effect on EGF-dependent tumor cell lines.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1990-01-01 | Comparative Biochemistry and Physiology Part B: Comparative Biochemistry |