Nucleosides
Mostrando 1-12 de 620 artigos, teses e dissertações.
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1. Simultaneous Quantification of Three Chemical Types Bioactive Compounds in Radix Isatidis and Its Relevant Pharmaceutical Dosage Forms by HPLC-DAD
A simple and rapid high performance liquid chromatography coupled with diode array detector (HPLC-DAD) method was developed for simultaneous quantification of three chemical types of bioactive compounds including an alkaloid (epigoitrin), six nucleosides (uracil, cytidine, hypoxanthine, uridine, guanosine and adenosine), and four phenylpropanoids (syringin,
J. Braz. Chem. Soc.. Publicado em: 2017-07
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2. Characterisation of iunH gene knockout strain from Mycobacterium tuberculosis
BACKGROUND Tuberculosis (TB) is an infectious disease caused mainly by the bacillus Mycobacterium tuberculosis. The better understanding of important metabolic pathways from M. tuberculosis can contribute to the development of novel therapeutic and prophylactic strategies to combat TB. Nucleoside hydrolase (MtIAGU-NH), encoded by iunH gene (Rv3393), is an
Mem. Inst. Oswaldo Cruz. Publicado em: 2017-03
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3. Natural Product-Derived Drugs Based on β-Adrenergic Agents and Nucleosides
This relatively short review demonstrates the very important role of the structures of the natural products adrenaline and relatives, in the design and subsequent approval of β-agonists and antagonists, and of modified nucleosides as anticancer, and in particular, antiviral agents against herpes (HSV), human immunodeficiency virus (HIV) and hepatitis C viru
J. Braz. Chem. Soc.. Publicado em: 2016-08
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4. CROMATOGRAFIA POR INTERAÇÕES HIDROFILICAS (HILIC): ESTADO DA ARTE E APLICAÇÕES
Hydrophilic interaction liquid chromatography (HILIC) has been gaining increased attention for its effective separation of highly polar compounds, which include carbohydrates, amino acids, pharmaceutical compounds, proteins, glycoproteins, nucleosides, etc. Polar compounds are usually poorly retained on reverse-phase liquid chromatography (RP-HPLC) columns o
Quím. Nova. Publicado em: 2016-02
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5. Modulatory effect of iron chelators on adenosine deaminase activity and gene expression in Trichomonas vaginalis
Trichomonas vaginalis is a flagellate protozoan that parasitises the urogenital human tract and causes trichomoniasis. During the infection, the acquisition of nutrients, such as iron and purine and pyrimidine nucleosides, is essential for the survival of the parasite. The enzymes for purinergic signalling, including adenosine deaminase (ADA), which degrades
Mem. Inst. Oswaldo Cruz. Publicado em: 23/10/2015
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6. A New Straightforward Synthesis of 2', 3'-Didehydro-2', 3'-dideoxy-2'-(2"- (trimethylsilyl)ethylthio)thymidine, Key Intermediate for the Synthesis of 2'-Substituted Thionucleosides
We describe herein a straightforward and efficient preparation of 2',3'-dideoxy-2'-(2''- (trimethylsilyl)ethylthio)thymidine, which allows the preparation of diverse potentially antiviral and/or anticancer nucleosides (disulfides, thiols, sulfides, thiocyanates).
J. Braz. Chem. Soc.. Publicado em: 2015-04
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7. Hepatitis B virus surface antigen seroconversion in HIV-infected individual after pegylated interferon-alpha treatment: a case report
Hepatitis B virus (HBV) infects from 6 to 14% of HIV-infected individuals. Concurrent HIV/HBV infection occurs due to the overlapping routes of transmission, particularly sexual and parenteral. HIV-infected patients that have acute hepatitis B have six times greater risk of developing chronic hepatitis B, with higher viral replication, rapid progression to e
J. Venom. Anim. Toxins incl. Trop. Dis. Publicado em: 10/12/2013
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8. Development and validation of a micellar electrokinetic capillary chromatographic method for the assessment of nucleosides, potential biomarkers, in blood serum
Tumores malignos são a causa de milhões de falecimentos no mundo todos os anos, porém a detecção da doença em seu estágio inicial pode salvar vidas. Biomarcadores tumorais permitem diagnósticos mais precoces e menos invasivos, portanto são vitais no tratamento do câncer. Os nucleosídeos têm sido pesquisados como um grupo potencial de biomarcadore
J. Braz. Chem. Soc.. Publicado em: 2013-06
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9. Modelo de regulação dos nucleotídeos extracelulares no líquido superficial das vias respiratórias
Extracellular nucleotides play a key role in the regulation of mucociliary clearance and thus are essential in protecting the airways against inhaled pathogens. Adenosine triphosphate (ATP), adenosine diphosphate (ADP) and adenosine monophosphate (AMP) nucleotides are secreted by the respiratory epithelium to the airway surface liquid, where they are metabol
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/03/2012
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10. Avaliação do modelo de hiperargininemia sobre parâmetros neuroquímicos, moleculares e compartamentais em peixe-zebra (Danio rerio): uma abordagem sobre o sistema purinérgico
Hyperargininemia is a rare disease caused by an innate error of the metabolism (EIM) biochemically characterized by the accumulation of arginine in body tissues due to arginase deficits. Mental retardation and other neurological symptoms are common in hyperargininemic patients. Several mechanisms have been proposed to describe the neurotoxicity of hiperargin
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/03/2012
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11. Síntese e avaliação biológica de análogos de nucleosídeos e triazóis contendo açúcares
A presente dissertação, intitulada Síntese e avaliação biológica de análogos de nucleosídeos e triazóis contendo açúcares encontra-se dividida em duas partes que descrevem a síntese de moléculas pertencentes a dois grupos de heterociclos de grande valor biológico. A primeira parte trata da tentativa de síntese de um novo análogo do nucleosíd
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/03/2011
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12. Antiherpes screening of marine organisms from Colombian Caribbean Sea
The exploration of marine environment represents a promising strategy in the search for new active antiviral compounds. The isolation and characterization of the nucleosides spongothymidine and spongouridine from the sponge Cryptotethia crypta used as models for the synthesis of ara-A (vidarabine), that has been used therapeutically against herpetic encephal
Revista Brasileira de Farmacognosia. Publicado em: 03/06/2011