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Esterase profile in a pyrethroid-resistant Brazilian strain of the cattle tick Boophilus microplus (Acari, Ixodidae) Genet. Mol. Biol.
Baffi,Milla Alves; Pereira,Cícero Donizete; Souza,Guilherme Rocha Lino de; Bonetti,Ana Maria; Ceron,Carlos Roberto; Gourlart,Luiz Ricardo.
The cattle tick Boophilus microplus causes great damage in livestock and is considered one of the most important tropical ectoparasites. The traditional method of control is based on the intensive use of pesticides, however the indiscriminate use of these compounds over the years has led to the selection of resistant ticks. Hydrolases, particularly esterases (EST), have been reported to be associated with acaricide resistance in B. microplus. We compared the esterase profile of susceptible and cypermethrin-resistant strains of adult B. microplus and a pyrethroid susceptible reference strain (the Mozzo strain) using polyacrylamide gel electrophoresis and specific staining. The electrophoretic profiles of protein extracts revealed the presence of four...
Tipo: Info:eu-repo/semantics/other Palavras-chave: Boophilus microplus; Pesticides; Resistance; Esterases.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572005000500016
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Development of a quantitative competitive reverse transcriptase polymerase chain reaction for the quantification of growth hormone gene expression in pigs Genet. Mol. Biol.
Franco,Maurício Machaim; Almeida,Juliana Franco; Souza,Guilherme Rocha Lino de; Antunes,Robson Carlos; Goulart,Luiz Ricardo.
After the advent of the genome projects, followed by the discovery of DNA polymorphisms, basic understanding of gene expression is the next focus to explain the association between polymorphisms and the level of gene expression, as well as to demonstrate the interaction among genes. Among the various techniques for the investigation of transcriptional profiling involving patterns of gene expression, quantitative PCR is the simplest analytical laboratory technique. The objective of this work was to analyze two strategies of a competitive PCR technique for the quantification of the pig growth hormone (GH) gene expression. A pair of primers was designed targeting exons 3 and 5, and two competitive PCR strategies were performed, one utilizing a specific...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Pig; GH gene; Gene expression; RT-PCR.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572003000100003
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Esterase profile in the postembryonic development of Rhipicephalusmicroplus PAB
Baffi,Milla Alves; Pereira,Cícero Donizete; Souza,Guilherme Rocha Lino de; Ceron,Carlos Roberto; Bonetti,Ana Maria.
The objective of this work was to analyze the pattern of esterase activity in the development stages of Rhipicephalus microplus by nondenaturing polyacrylamide gel electrophoresis using specific staining for esterase. The electrophoretical results revealed the presence of nine regions displaying esterase activity, stained with both alpha-naphthyl acetate and beta-naphthyl acetate, and classified as alpha-beta-esterase. Stage-specific esterases were found, with the first nymphal and larval stages showing the greatest esterase activity throughout the development. An esterase called EST-4 was detected only in males and was considered sex-specific. There are differences in the esterase profile among the different postembryonic development stages of R. microplus.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cattle tick; Resistance to acaricides; Tick control.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2007000800016
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