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1.
Pathogens ; 12(9)2023 Sep 21.
Artigo em Inglês | MEDLINE | ID: mdl-37764993

RESUMO

SARS-CoV-2 was the cause of the global pandemic that caused a total of 14.9 million deaths during the years 2020 and 2021, according to the WHO. The virus presents a mutation rate between 10-5 and 10-3 substitutions per nucleotide site per cell infection (s/n/c). Due to this, studies aimed at knowing the evolution of this virus could help us to foresee (through the future development of new detection strategies and vaccines that prevent the infection of this virus in human hosts) that a pandemic caused by this virus will be generated again. In this research, we performed a functional annotation and identification of changes in Nsp (non-structural proteins) domains in the coronavirus genome. The comparison of the 13 selected coronavirus pangenomes demonstrated a total of 69 protein families and 57 functions associated with the structural domain's differentials between genomes. A marked evolutionary conservation of non-structural proteins was observed. This allowed us to identify and classify highly pathogenic human coronaviruses into alpha, beta, gamma, and delta groups. The designed Nsp cluster provides insight into the trajectory of SARS-CoV-2, demonstrating that it continues to evolve rapidly. An evolutionary marker allows us to discriminate between phylogenetically divergent groups, viral genotypes, and variants between the alpha and betacoronavirus genera. These types of evolutionary studies provide a window of opportunity to use these Nsp as targets of viral therapies.

2.
Rev. colomb. biotecnol ; 16(2): 5-6, jul.-dic. 2014.
Artigo em Espanhol | LILACS | ID: lil-731725
3.
Med Chem ; 8(6): 1039-44, 2012 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-22762161

RESUMO

Chagas disease continues to be one of the main parasitic diseases in Latin America. Despite the fact that it was discovered more than 100 years ago, no suitable pharmacologic treatment is available. We report the synthesis of new sulfonamidoquinoline and sulfonamides derivatives that were evaluated in vitro against two strains of Trypanosoma cruzi (NINOA and INC-5). Structure-activity relationship analysis indicated that small aromatic and large aromatic substituents on 4-aminoquinaldine increased trypanocidal activity on INC-5 and NINOA strains, respectively. Additionally, results show the importance of the sulfonamide group as a scaffold for the development of new anti-T. cruzi agents. Seven sulfonamide derivatives showed better lytic activity than nifurtimox and beznidazole against both strains of T. cruzi. N- (biphenyl-4-yl-sulfonyl)-nicotinamide (P-012) was established as the leader of the series for the development of more effective agents.


Assuntos
Sulfonamidas/síntese química , Sulfonamidas/farmacologia , Tripanossomicidas/síntese química , Tripanossomicidas/farmacologia , Trypanosoma cruzi/efeitos dos fármacos , Animais , Técnicas de Química Sintética , Concentração Inibidora 50 , Camundongos , Especificidade da Espécie , Sulfonamidas/química , Tripanossomicidas/química
4.
Rev. colomb. biotecnol ; 10(1): 49-63, jul. 2008. tab
Artigo em Espanhol | LILACS | ID: lil-503548

RESUMO

El desarrollo de las formulaciones insecticidas elaboradas a base de la bacteria Bacillus thuringiensis es una tecnología centenaria que ha recibido un fuerte impacto en décadas recientes. La mezcla de esporas y cristales, que es el principio activo de estas preparaciones, ha sido objeto de estudio constante y en ello se destaca la búsqueda de cepas cada vez más potentes o mejoradas. Así mismo, los materiales utilizados incluyen una amplia variedad de ingredientes completamente biodegradables como pueden ser partes de las plantas que el insecto consume, tales como hojas, tallos o frutos secos y molidos que pueden funcionar como estimulantes de la alimentación, además de melazas o azúcares. Algunas sustancias pegajosas como las gomas, que dan la capacidad de adherencia, o los almidones, que funcionan como agentes encapsulantes, sirven para evitar el arrastre por el viento y el lavado por la lluvia. Los colorantes y abrillantadores ópticos brindan al principio activo protección contra la luz UV, y otros agentes funcionan como potenciadores de la actividad tóxica. Todos ellos son amigables al ambiente y e inocuos para el hombre, otros vertebrados, plantas, e incluso para insectos benéficos, pero simultáneamente son capaces de ser ampliamente aceptados por los insectos plaga, con la intención de que la formulación sea ingerida y, finalmente, sea altamente efectiva. Esto ha traído como consecuencia la fabricación de una amplia variedad de productos comerciales cuya efectividad los ha posicionado en el mercado mundial, pero cuya investigación continúa para brindar formulaciones específicas hacia nuevas plagas o evitar la resistencia en aquellas ya conocidas.


Assuntos
Bacillus thuringiensis
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