RESUMO
The aim of this study was to develop versatile diagnostic tools based on the use of innovative polythiolated probes for the detection of multiple viruses. This approach is compatible with optical enzyme-linked oligosorbent assay (ELOSA) or electrochemical (biosensors) detection methods. The application targeted here concerns the rapid genotyping of Hepatitis C virus (HCV). HCV genotyping is one of the predictive parameters currently used to define the antiviral treatment strategy and is based on the sequencing of the viral NS5b region. Generic and specific NS5b amplicons were produced by real-time polymease chain reaction (RT-PCR) on HCV(+) human plasma. Original NS5b probes were designed for genotypes 1a/1b, 2a/2b/2c, 3a, and 4a/4d. Robust polythiolated probes were anchored with good efficacy on maleimide-activated microplates (MAM) and gold electrodes. Their grafting on MAM greatly increased the sensitivity of the ELOSA test which was able to detect HCV amplicons with good sensitivity (10 nM) and specificity. Moreover, the direct and real-time electrochemical detection by differential pulse voltammetry enabled a detection limit of 10 fM to be reached with good reproducibility. These innovative polythiolated probes have allowed us to envisage developing flexible, highly sensitive, and easy-to-handle platforms dedicated to the rapid screening and genotyping of a wide range of viral agents.
Assuntos
Técnicas Biossensoriais/métodos , Técnicas Eletroquímicas , Hepacivirus/genética , Sondas de Oligonucleotídeos/química , Polímeros/química , Compostos de Sulfidrila/química , Genótipo , Humanos , Estrutura Molecular , Reação em Cadeia da Polimerase em Tempo RealRESUMO
Background: In line with our recent discovery of an efficient anticancer thiazolebenzenesulfonamide framework HA15 (1) based on a remarkable endoplasmic reticulum stress inducement mode of action, we report herein a series of innovative constrained HA15 analogs, featuring four types of bicylic derivatives. Results: The structure-activity relationship analysis, using a cell line assay, led us to identify a novel version of HA15: a new benzothiazole derivative (10b) exhibiting important anti-melanoma effect against sensitive and resistant melanoma cells. Meanwhile, compound 10b induced a significant tumor growth inhibition in vivo with no apparent signs of toxicity. Conclusion: These results consistently open new directions to improve and develop more powerful anticancer therapeutics harboring this type of fused framework.