title: Vanadium Complexes with Hydrazone or Thiosemicarbazone Ligands as Potential Anti-Mycobacterium tuberculosis Agents.
abstract: Tuberculosis (TB) is an infectious disease caused mainly by Mycobacterium tuberculosis (MTB) and still an important public health problem worldwide. Some factors like the emergence of multidrug resistant (MDR) and extensively drug-resistant (XDR) strains make urgent the research of new active compounds. Searching for new inorganic compounds against TB, three new dioxovanadium(V) complexes were obtained upon reaction of [VO(acac)2] with hydrazone and thiosemicarbazone ligands derived from di-2-pyridyl ketone. Spectroscopic studies and X-ray crystallography revealed asymmetrically oxo bridged binuclear complexes of the type [{VO(L(1,2))}2(μ-O)2], involving the hydrazone ligands, while a mononuclear square pyramidal complex of the type [VO2(L(3))] was formed with the thiosemicarbazone ligand. The compounds were tested against M. tuberculosis and three of them, with MICs values between 2.00 and 3.76 μM were considered promising for TB treatment. Such MIC values are comparable or better than those found for some drugs currently used in TB treatment.
authors.forename: Paula C
authors.initials: PC
authors.lastname: de Souza
authors.forename: Pedro I S
authors.initials: PI
authors.lastname: Maia
authors.forename: Heloisa B
authors.initials: HB
authors.lastname: de Barros
authors.forename: Clarice Q F
authors.initials: CQ
authors.lastname: Leite
authors.forename: Victor M
authors.initials: VM
authors.lastname: Deflon
authors.affiliation: School of Pharmaceutical Sciences, Sao Paulo State University, 14801-902, Araraquara, SP, Brazil. fernandopavan@fcfar.unesp.br.
authors.forename: Fernando R
authors.initials: FR
authors.lastname: Pavan
mesh_terms: D000900:Anti-Bacterial Agents / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology*; D018360:Crystallography, X-Ray; D015195:Drug Design; D006835:Hydrazones / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology*; D008024:Ligands; D008826:Microbial Sensitivity Tests; D009169:Mycobacterium tuberculosis / Q000187:drug effects*; D013057:Spectrum Analysis; D013882:Thiosemicarbazones / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology*; D014639:Vanadium / Q000737:chemistry*
chemical_list: D000900:Anti-Bacterial Agents; D006835:Hydrazones; D008024:Ligands; D013882:Thiosemicarbazones; D014639:Vanadium