893 resultados para Aedes (Ochlerotatus)
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Phytochemical investigation from the stems of Spathelia excelsa (Rutaceae) collected in Amazonas yielded deacetylspathelin (1), 7,8-dimethoxyflindersine (2), new glabretal-type triterpenoid 3β-angeloyl-21,24-epoxy-7α, 21α, 23α, 25-tetrahydroxy-4α, 4β, 8β, 10β-tetramethyl-25-dimethyl-14, 18-cyclo-5α, 13α, 14α, 17α-cholestane (3), in addition to the known steroids β-sitosterol and stigmasterol. Their structures were established on the basis of spectral data. The compounds 1 and 3 were assayed on Aedes aegypti (larvicidal and adulticidal activities and compound 3 exhibited larvicidal properties with LC50 of 4,8 µg/mL.
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In the search for new larvicides from plants, we have investigated the potential activity of the rotenoids deguelin (1), 12a-hydroxy-α-toxicarol (2) and tephrosin (3), isolated from the bioactive ethanol extract of roots of Tephrosia toxicaria Pers., against Aedes aegypti, the main vector of dengue. The absolute configuration of these compounds was determined by circular dichroism (CD) spectra. The LC50 values of the compounds evaluated justify the potential of T. toxicaria as a new natural larvicide.
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Prostaglandins are natural fatty acid derivatives with diverse physiological effects, including immune function and the control of cell growth. While the action of prostaglandins in the induction of stress proteins in vertebrate cells is well documented, their functions in invertebrate cells have been poorly investigated. The purpose of the present study was to investigate the effect of prostaglandin A1 (PGA1; 0.25, 1.25 and 12.5 µg/ml) on protein synthesis during the growth of Aedes albopictus cells. We found that PGA1 stimulates the synthesis of several polypeptides with molecular masses of 87, 80, 70, 57, 29, 27 and 23 kDa in Aedes albopictus cells. When the proteins induced by PGA1 and those induced by heat treatment were compared by polyacrylamide gel electrophoresis, PGA1 was found to induce the stress proteins. The HSP70 family and the low-molecular weight polypeptides (29 and 27 kDa, respectively) were induced by PGA1 in the lag phase. We also observed that PGA1 is able to induce a 23-kDa polypeptide independently of the growth phase of the cell
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Tesis (Maestría en Ciencias con Especialidad en Entomología Médica) UANL
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Tesis (Maestría en Ciencias en Entomología Médica) UANL
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Tesis (Maestría en Ciencias con Especialidad en Entomología Médica) UANL
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Tesis (Maestría en Ciencias con Especialidad en Entomología Médica) UANL
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Tesis (Maestría en Ciencias con Especialidad en Microbiología Industrial) UANL
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Tesis (Maestria en Ciencias con Especialidad en Entomología Médica) UANL
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Tesis (Maestría en Ciencias con Especialidad en Entomología Médica) UANL.
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Tesis (Maestría en Ciencias con Especialidad en Entomología Médica) UANL
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Tesis (Maestría en Ciencias con Especialidad en Entomología Médica) UANL
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Tesis (Maestría en Ciencias con Especialidad en Entomología Médica) UANL
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Tesis (Maestría en Ciencias con Especialidad en Química de Productos Naturales) UANL
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Tesis (Maestría en Ciencias con Especialidad en Entomología Médica) UANL