| Full text | |
| Author(s): |
Caldas, Lhais Araujo
;
Rodrigues, Mariana T.
;
Batista, Andrea N. L.
;
Batista, Joao M., Jr.
;
Lago, Joao H. G.
;
Ferreira, Marcelo J. P.
;
Rubio, Ileana G. S.
;
Sartorelli, Patricia
Total Authors: 8
|
| Document type: | Journal article |
| Source: | Molecules; v. 25, n. 13, p. 11-pg., 2020-07-01. |
| Abstract | |
This work describes the chromatographic fractionation of the aerial parts of Calea pinnatifida and the structural characterization and determination of the absolute configuration of the isolated compounds as well as their antitumor potential. The HPLC fractionation of the CH2Cl2 phase of the MeOH extract from the leaves of C. pinnatifida led to the isolation of two related sesquiterpene lactones (STLs): calein C (1) and calealactone B (2). Additionally, during the purification process, a derivative of calein C (3) was formed as a product of the Michael addition of MeOH. The structures of Compounds 1-3 were established based on spectroscopic and spectrometric data, while the absolute stereochemistry was established by vibrational circular dichroism. In order to evaluate the effect of the conjugated double bonds on the cytotoxic activity of STLs, Compounds 1-3 were tested against anaplastic (KTC-2) and papillary (TPC-1) thyroid carcinoma cells. Calein C was the most active of the STLs, and displayed activity against both KTC-2 and TPC-1. On the other hand, the calein C derivative (3) was the least cytotoxic of all the compounds tested. These results are promising and suggest the importance of studying sesquiterpene lactones isolated from C. pinnatifida in terms of antitumor activity, especially considering the effects of alpha,beta-unsaturated carbonyl systems. (AU) | |
| FAPESP's process: | 16/24985-4 - Study the chemical composition of fungi and plants of the Atlantic Forest aimed at antitumor, antiparasitic and antimicrobial potential |
| Grantee: | Patricia Sartorelli |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 20/05741-2 - Lactonas sesquiterpênicas de Calea pinnatifida: configuração absoluta e requisitos estruturais para atividade anti-tumoral |
| Grantee: | Patricia Sartorelli |
| Support Opportunities: | Regular Research Grants - Publications - Scientific article |
| FAPESP's process: | 14/25222-9 - Vibrational chiroptical spectroscopy for stereochemical characterization of small molecules and macromolecules |
| Grantee: | João Marcos Batista Junior |
| Support Opportunities: | Research Grants - Young Investigators Grants |