Synthesis and In Vitro and Silico Anti-inflammatory Activity of New Thiazolidinedione-quinoline Derivatives

BACKGROUND

Inflammation is a series of complex defense-related reactions. The inflammation cascade produces various pro-inflammatory mediators. Unregulated production of these pro-inflammatory mediators can lead to a wide range of diseases, including rheumatoid arthritis, sepsis, and inflammatory bowel disease. In the literature, the anti-inflammatory action of quinoline and thiazolidinedione nuclei are well established, alone, and associated with other nuclei. The synthesis of hybrid molecules is a strategy for obtaining more efficient molecules due to the union of pharmacophoric nuclei known to be related to pharmacological activity.

OBJECTIVE

Based on this, this work presents the synthesis of thiazolidinedione-quinoline molecular hybrids and their involvement in the modulation of cytokines involved in the inflammatory reaction cascade.

METHODS

After synthesis and characterization, the compounds were submitted to cell viability test (MTT), ELISA IFN-γ and TNF-α, adipogenic differentiation, and molecular docking assay with PPARy and COX-2 targets.

RESULTS

LPSF/ZKD2 and LPSF/ZKD7 showed a significant decrease in the concentration of IFN- γ and TNF-α, with a dose-dependent behavior. LPSF/ZKD4 at a concentration of 50 μM significantly reduced IL-6 expression. LPSF/ZKD4 demonstrates lipid accumulation with significant differences between the untreated and negative control groups, indicating a relevant agonist action on the PPARγ receptor. Molecular docking showed that all synthesized compounds have good affinity with PPARγ e COX-2, with binding energy close to -10,000 Kcal/mol.

CONCLUSION

These results demonstrate that the synthesis of quinoline-thiazolidinedione hybrids may be a useful strategy for obtaining promising candidates for new anti-inflammatory agents.

Synthesis, Assessment of Antineoplastic Activity and Molecular Docking of Novel 2-Thioxo-oxazolidin-4-one Derivatives

BACKGROUND

Oxazolidinones display several biological effects including anticancer activity. The purpose of this present work was to investigate a series of novel oxazolidinone derivatives with potential antineoplastic activity. It was evaluated its mechanism of death induction and cell cycle effects. Molecular docking study was accomplished through proteins of Cyclin-Dependent Kinases family (CDK). The new compound LPSF/NBM-2 appear to promote cell cycle arresting at G2/M phase and increased the percentage of apoptotic cells.

METHODS

Oxazolidinone derivatives were obtained through Knoevenagel condensation. Cytotoxic assay was evaluated through MTT method. Flow cytometry was performed in order to investigate the effects of the new compounds in the cell cycle stages, induction of cell death and apoptosis. A blind docking was performed through the swissdock online server and the analysis of the results was performed using the UCSF Chimera and discovery studio biovia software.

RESULTS

LPSF/NBM-1 and LPSF/NBM-2 displayed the most cytotoxic activity against HL-60 (IC50 = 54.83 µM) and MOLT-4 (IC50 = 51.61 µM) cell lines. LPSF/NBM-2 showed an increased percentage of cell population at G2/M phase. Molecular-docking results of LPSF/NBM-1 and LPSF/NBM-2 suggested binding affinity with the evaluated CDK proteins.

CONCLUSION

LPSF/NBM-1 and LPSF/NBM-2 displayed cytotoxic profile against Hl-60 and MOLT-4. LPSF/NBM-2 increased cell population percentage at G2/M phase and promoted induction of cell death when compared to non-treated cells in MOLT-4 cell line. Based on these findings, oxazolidinone derivatives could be highlighted as possible cytostatic agent against lymphoma cells. Molecular docking results suggest the action of LPSF/NBM-1 and LPSF/NBM-2 compounds on enzymes of cyclin-dependent kinases family, however more studies are demanded in order to stablish this correlation.