Navegando por Autor "Oliveira Junior, Haliton Alves de"
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Item 7-Chloroquinolinotriazoles : synthesis by the azide-alkyne cycloaddition click chemistry, antimalarial activity, cytotoxicity and SAR studies.(2014) Pereira, Guilherme Rocha; Brandão, Geraldo Célio; Arantes, Lucas Micquéias; Oliveira Junior, Haliton Alves de; Paula, Renata Cristina de; Nascimento, Maria Fernanda Alves do; Santos, Fábio Mendes dos; Rocha, Ramon Kleber da; Lopes, Júlio César Dias; Oliveira, Alaíde Braga deTwenty-seven 7-chloroquinolinotriazole derivatives with different substituents in the triazole moiety were synthesized via copper-catalyzed cycloaddition (CuAAC) click chemistry between 4-azido-7- chloroquinoline and several alkynes. All the synthetic compounds were evaluated for their in vitro activity against Plasmodium falciparum (W2) and cytotoxicity to Hep G2A16 cells. All the products disclosed low cytotoxicity (CC50 > 100 mM) and five of them have shown moderate antimalarial activity (IC50 from 9.6 to 40.9 mM). As chloroquine analogs it was expected that these compounds might inhibit the heme polymerization and SAR studies were performed aiming to explain their antimalarial profile. New structural variations can be designed on the basis of the results obtained.Item The activity-based cost of drug-susceptibility test of Mycobacterium tuberculosis through Kit SIRE Nitratase® plastlabor.(2020) Almeida, Isabela Neves de; Silva, Suely Conceição Alves da; Oliveira Junior, Haliton Alves de; Figueredo, Lida Jouca de Assis; Soares, Valéria Martins; Carvalho, Wânia da Silva; Kritski, Afrânio; Fiori, Maria Cláudia da Silva Vater da Costa; Miranda, Silvana Spíndola deBackground: Drug‐resistant tuberculosis (TB) is an ongoing health threat, and the greatest challenge to adequate control of TB in many countries lies in the lack of proper laboratory drug‐susceptibility test. The aim of this study was to evaluate the activity‐based costs (ABC) of Kit SIRE Nitratase® (Kit SIRE) and compare its values with the conventional drug‐susceptibility test. Methods: The ABC was calculated for three different approaches: Kit SIRE (clinical samples and cultures), proportion methods in Lowenstein Jensen (PM‐LJ), and the BactecTM MGITTM 960 system based on Mycobacterial Research Laboratory’s routine. Results: The ABC of Kit SIRE from cultures was US$ 148.54, while from clinical samples was US$ 136.12. In the case of conventional tests, the ABC of BactecTM MGITTM 960 was US$ 227.63 and of the PM‐LJ was US$ 132.64. The Kit SIRE has a lower ABC when clinical samples are used instead of cultures. Compared to conventional tests, the ABC is similar to the PM‐LJ and lower the BactecTM MGITTM 960. Conclusion: The Kit SIRE should be used as a screening method in clinical specimens and in culture for laboratories that do not have BactecTM MGITTM 960. Therefore, it can be incorporated into the routine of laboratories in countries with low resources and a high burden of TB and drug‐resistant TB.