Avaliação farmacológica e toxicológica de novos candidatos a protótipos de fármacos antitumorais
Carregando...
Data
2011-03-02
Autores
Título da Revista
ISSN da Revista
Título de Volume
Editor
Universidade Federal de Goiás
Resumo
As part of a line of research aimed at the pharmacological and toxicological evaluation of new candidates for antitumor drug prototypes, this work was conducted to evaluate pharmacological and toxicological compounds LQFM030, and LQFM031 LQFL032, drawn from nutlins prototypes. Additionally, we also evaluated whether the compounds LQFM004, LQFM005, and LQFM028 LQFM029 initially envisioned as candidates for prototypes of antipsychotic drugs, drawn from LASSBio579. Initially there was a cytotoxic screening all candidates, using the cytotoxicity test of exclusion of Trypan Blue in K-562 cells. Given this, it was observed that the best IC50 values were obtained with the candidates and LQFM030 LQFM029 (0.55 and 0.56 mM, respectively) and from then on had as starting point for these two molecules to a more detailed and thorough cytotoxicity, where it was observed that the molecule had the best LQFM030 cytotoxic profile in the test of exclusion of Trypan blue and the MTT reduction test, at intervals of 24, 48 and 72, compared with LQFM029 the molecule, using the cell line K-562. Given this, the candidate LQFM030 was the target of other studies conducted to study the survival, safety tests (Capture the Neutral Red dye, Acute Toxicity Oral), cell cycle, cell death mechanism of apoptosis and antioxidant activity. The data showed that the molecule LQFM030 increased life expectancy of the animals, and an IC50 value commensurate with the value of Nutlins found in literature, on the evaluation of acute toxicity, according to OECD 423, the molecule was rated 5 or non- classified according to the classification GSH, the cell cycle was observed an increase in G2 / M phase (73%) and sub-G1 phase (73.6%), and a decrease in S phase (40.9%) ; to assess the mechanism of cell death was characterized increased expression of Bax (8 times compared to untreated group), and a decrease of Bcl-2 (84%) as well as an increase in membrane potential and a decrease of ROS (reactive oxygen species), where there was not a change in protein expression of TNF and NFκβ; antioxidant activity did not show a significant effect, and before the candidate cyclic voltammetry showed only the presence of peak oxidation, not being characterized as a good redox system. When tested for safety in basal cell 3T3, the candidate presented a cytotoxicity with IC50 value of approximately 0.14 mM Thus, the candidate prototype antitumor drug LQFM030 presented as a good candidate for antitumor prototype with important data for such purpose, and the need for further detailed studies to better conceptualization.
Descrição
Palavras-chave
Citação
CARVALHO, Flávio Silva de. Avaliação farmacológica e toxicológica de novos candidatos a protótipos de fármacos antitumorais. 2011. 117 f. Dissertação (Mestrado em Ciências Farmacêuticas) - Universidade Federal de Goiás, Goiânia, 2011.