Biological evaluation of glycosyl-isoindigo derivatives against the pathogenic agents of tropical diseases (malaria, Chagas disease, leishmaniasis and human African trypanosomiasis).

The biological activities of diversely substituted glycosyl-isoindigo derivatives against the causative agents of tropical diseases (malaria, Chagas disease, leishmaniasis and human African trypanosomiasis) are reported. Some of the compounds tested showed interesting activities with good selectivity indices, particularly against Trypanosoma brucei rhodesiense. These results suggested, for the first time, that glycosyl-isoindigo derivatives could be of interest for the discovery of new lead compounds to treat tropical diseases.

Synthesis and antiproliferative activities of isoindigo and azaisoindigo derivatives.

In the course of structure-activity relationship studies, diversely substituted 1-(beta- d-acetylatedglucopyranosyl)isoindigo derivatives were prepared from indolines. New 7'-azaisoindigo analogues were also synthesized by coupling a glycosylated isatine and a 7-azaindolin-2-one derivative. Compounds containing a 7'-azaisoindigo framework have never been described before. To get an insight into the substitution pattern required for the best biological potencies, their antiproliferative activities were evaluated toward a human buccal carcinoma cell line (KB) and two human myeloid leukaemia cell lines (K562, HL60).

Synthesis and biological evaluation of diversely substituted indolin-2-ones.

The synthesis of indolin-2-one derivatives substituted in the 3-position by an aminomethylene group bearing either an ornithine or a lysine residue is described. The inhibitory activities of these compounds toward a panel of eight kinases were examined. Furthermore, the antibacterial activities of the prepared compounds were tested against two Gram-positive bacteria Bacillus cereus and Streptomyces chartreusis, a Gram-negative bacterium Escherichia coli and a yeast Candida albicans.

Synthesis and antiproliferative activities of diversely substituted glycosyl-isoindigo derivatives.

In the course of structure-activity relationship studies, diversely substituted 1-(beta-D-glucopyranosyl)-isoindigo derivatives were prepared from commercially available indolines. Their antiproliferative activities were evaluated toward a panel of human solid cancer cell lines (PC 3, DLD-1, MCF-7, M4Beu, A549, PA 1), a murine cell line (L929) and a human fibroblast primary culture to get an insight into the substitution pattern required for the best biological potencies.

Synthesis, kinase inhibitory potencies and in vitro antiproliferative activity of isoindigo and 7'-azaisoindigo derivatives substituted by Sonogashira cross-coupling.

In the course of structure-activity relationship studies we were interested in the synthesis of isoindigo and 7'-azaisoindigo derivatives substituted at the N-1 position by a 1-(2,3,4,6-tetra-O-acetyl-beta-D-glucopyranosyl), at the 5'-position by various chains introduced by Sonogashira cross-coupling and substituted or not at the 5-position by a bromine atom. To get an insight into the substitution pattern required for the best biological potencies, their kinase inhibitory potencies and their in vitro antiproliferative activities were evaluated. The derivatives were tested toward four protein kinases (CDK5/p25, GSK3, CK1, Dyrk1A) and their in vitro antiproliferative activity was tested against two human myeloid leukaemia cell lines (K562 and HL60).

In-vitro antiproliferative activities and kinase inhibitory potencies of glycosyl-isoindigo derivatives.

In the course of studies on the preparation of potential kinase inhibitors, we were interested in the synthesis of diversely substituted glycosyl-isoindigo derivatives. To get an insight into the effect of the substitution pattern of the isoindigo aromatic and carbohydrate moieties on the biological activities and to identify the cellular target(s) involved in the in-vitro antiproliferative activity of these derivatives, their inhibitory activities toward a panel of 10 different kinases were examined. The best inhibitory activities were found toward cyclin-dependent kinase 2/cyclin A. Molecular modelling experiments were carried out to investigate the binding interactions between the active site of cyclin-dependent kinase 2 and the lead compound of this series.