eupatoriopicrine and Carcinoma--Ehrlich-Tumor

eupatoriopicrine has been researched along with Carcinoma--Ehrlich-Tumor* in 2 studies

Other Studies

2 other study(ies) available for eupatoriopicrine and Carcinoma--Ehrlich-Tumor

ArticleYear
Cytotoxicity of artemisinin-related endoperoxides to Ehrlich ascites tumor cells.
    Journal of natural products, 1993, Volume: 56, Issue:6

    A series of artemisinin-related endoperoxides was tested for cytotoxicity to Ehrlich ascites tumor (EAT) cells using the microculture tetrazolium (MTT) assay. Artemisinin [1] had an IC50 value of 29.8 microM. Derivatives of dihydroartemisinin [2], being developed as antimalarial drugs (artemether [3], arteether [4], sodium artesunate [5], artelinic acid [6], and sodium artelinate [7]), exhibited a somewhat more potent cytotoxicity. Their IC50 values ranged from 12.2 to 19.9 microM. The presence of an exocyclic methylene fused to the lactone ring, as for artemisitene [9], led to higher cytotoxicity than 1. From the two epimeric 11-hydroxyartemisinin derivatives, the R form 12 showed a considerably higher cytotoxicity than the S form 13. Opening of the lactone ring of 1 dramatically reduced the cytotoxicity. The ether dimer 8 of 2 was the most potent cytotoxic agent, its IC50 being 1.4 microM. The variations in cytotoxicity between the structurally related compounds mostly correlated well with the theoretical capacity of radical formation and stabilization. In some cases lipophilicity or the presence of an electrophilic moiety seemed to have a determinant influence on cytotoxicity. The artemisinin-related endoperoxides showed cytotoxicity to EAT cells at higher concentrations than those needed for in vitro antimalarial activity, as reported in the literature.

    Topics: Animals; Antineoplastic Agents, Phytogenic; Artemisinins; Carcinoma, Ehrlich Tumor; Cell Survival; Chemical Phenomena; Chemistry, Physical; Cisplatin; Doxorubicin; Peroxides; Sesquiterpenes; Structure-Activity Relationship; Tetrazolium Salts; Tumor Cells, Cultured

1993
Induction of DNA damage in Ehrlich ascites tumour cells by exposure to eupatoriopicrin.
    Biochemical pharmacology, 1989, Jul-15, Volume: 38, Issue:14

    The sesquiterpene lactone eupatoriopicrin (EUP) from Eupatorium cannabinum L. has been shown to be cytotoxic in a glutathione (GSH)-dependent way. In order to assess possible DNA damage as a cause for cell death, the study reported was initiated. After 2 hr incubation of Ehrlich ascites tumour cells with EUP, the DNA damage, determined by the use of an alkaline DNA unwinding method, followed by hydroxylapatite column chromatography of degraded DNA, was observed at concentrations only slightly higher than those causing cell death in a clonogenic assay. The amount of EUP, requested to demonstrate DNA damage after a 24-hr post-incubation period lay within the concentration range that was effective in the clonogenic assay (1-10 micrograms/ml). Glutathione (GSH) depletion of the cells to about 99%, by use of buthionine sulphoximine (BSO), enhanced the extent of DNA damage. It is concluded that EUP-induced DNA damage may play a role in the observed cytotoxicity.

    Topics: Animals; Antineoplastic Agents; Carcinoma, Ehrlich Tumor; Cell Survival; DNA Damage; DNA, Neoplasm; Sesquiterpenes; Tumor Cells, Cultured

1989