Synergistic effects between macrocyclic diterpenes and doxorubicin on resistant cancer cells

Abstract

The aim of this study was to search for new multidrug resistance reversal agents from Euphorbia species. In this way, three new jatophane diterpenes (1 – 3) isolated from E.tuckeyana (Fig. 1) and three new lathyrane esters (4 - 6) obtained through acylation reations of latilagascene B (Fig. 4), have been screened for their potential P-gp modulating properties on mouse resistance cancer cell lines. Furthermore, in the combination chemotherapy model, the interaction between the cytostatic epirubicine and the six diterpenes were also evaluated.