Enhancing Macrocyclic Diterpenes as Multidrug-Resistance Reversers: Structure–Activity Studies on Jolkinol D Derivatives
作者:Mariana Reis、Ricardo J. Ferreira、Maria M. M. Santos、Daniel J. V. A. dos Santos、Joseph Molnár、Maria-José U. Ferreira
DOI:10.1021/jm301441w
日期:2013.2.14
The phytochemicalstudy of Euphorbia piscatoria yielded jolkinol D (1) in a large amount, whose derivatization gave rise to 12 ester derivatives (2–13) and hydrolysis to compound 14. The in vitro modulation of P-gp of compounds 1–14 was evaluated through a combination of transport and chemosensitivity assays, using the L5178 mouse T lymphoma cell line transfected with the human MDR1 gene. Apart from
Seventeen new lathyrane diterpenoids (1 - 17) and two known analogues have been isolated from an ethanolic extract of Euphorbia micractina roots. Their structures including absolute configurations were determined by spectroscopic data interpretation and single-crystal X-ray crystallography. Compound 10 showed activity against HIV-1 replication in vitro, with an IC(50) value of 8.2 mu M. Compounds 6, 7, 11, 14, 15, and 18, at 10(-6) M, showed significant vascular-relaxing activities against phenylephrine-induced vasoconstriction with relaxation rates of 48%, 41%, 42%, 48%, 50%, and 53%, respectively.
Exploring Jolkinol D Derivatives To Overcome Multidrug Resistance in Cancer
作者:Mariana A. Reis、Omar B. Ahmed、Gabriella Spengler、Joseph Molnár、Hermann Lage、Maria-José U. Ferreira
DOI:10.1021/acs.jnatprod.6b01084
日期:2017.5.26
Macrocyclic monoacyl lathyrane derivatives bearing a benzoyl moiety were previously found to be strong ABCB1 modulators. To explore the effects of different substituents of the aromatic moiety, 14 new compounds (1.1–1.7, 1.10, and 2.1–2.4) were prepared from jolkinol D (1), obtained fromEuphorbia piscatoria, and from jolkinodiol (2), its hydrolysis derivative. Compounds 1.8 and 1.9, having aliphatic