Avaliação das atividades citotóxica e antibacteriana de compostos triazenos

Abstract

Neoplasms are a major cause of death worldwide and have been worrying about the medical and scientific community, as most anticancer vector does not act on cancer cells, triggering numerous side-effects and, in some cases, resistance to treatment. No less worrying is the resistance acquired by bacteria, which culminate in strains with the phenomenon of multi-drug resistance commercially available. In this context, many research groups that adopted the medicinal chemistry, turn their studies to the discovery of new molecules that may be more selective therapeutic approaches with fewer side effects than currently exist. Triazenes compounds represent a class of compounds having wide versatility with proven pharmacological antimicrobial and antitumor activities. Similarly, considering the results from several studies relevant complexes of palladium (II) have been considered as promising therapeutic agents. As a result, two novel compounds were synthesized, and a binder, and a triazene triazenido complex with palladium (II), which according to the IUPAC nomenclature rules were so named, respectively: 1,3-Bis(4-sulfonamidephenyl)triazene (1) and {trans-Bis-[1,3-bis-(4sulfonamidephenyl)triazenide]bis(piridine)palladium(II)}{piridine)4palladium(II)} {potassim(I)}.water (2). We assess the cytotoxic potential of such compounds by colorimetric assay bromide 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT). Mononuclear cells from different types of leukemia and control samples were incubated for 24 hours with the compounds at concentrations 12.5, 50 and 100 μmol mL-1. To examine the antimicrobial activity of the compounds we used the measurement method of broth microdilution by determining the minimum inhibitory concentration (MIC) against the gram positive and gram negative bacteria. The results showed that the compounds showed significant cytotoxicity in the tested samples, but the compound 2 had lower IC50 than 1. Significant differences were observed between the compounds in the samples of CML and at concentrations 12,5 e 50 μmol mL-1. The antibacterial activity was found narrow spectrum, focused on gram-positive strains.