Please use this identifier to cite or link to this item: http://ciatej.repositorioinstitucional.mx/jspui/handle/1023/337
Molecular cloning and characterization of a glycine-like receptor gene from the cattle tick Rhipicephalus (Boophilus) microplus (Acari: Ixodidae)
MOISES MARTINEZ VELAZQUEZ
JOSE MIGUEL FLORES FERNANDEZ
Abel Gutiérrez_Ortega
EDUARDO PADILLA CAMBEROS
RODOLFO HERNANDEZ GUTIERREZ
RODRIGO ROSARIO CRUZ
Acceso Abierto
Atribución-NoComercial-SinDerivadas
www.parasite-journal.org
DOI: 10.1051/parasite/2014047
Rhipicephalus (Boophilus) microplus, glycine receptor, ivermectin, resistance, chloride channel
The cattle tick Rhipicephalus (Boophilus) microplus is the most economically important ectoparasite affecting the cattle industry in tropical and subtropical areas around the world. The principal method of tick control has relied mainly on the use of chemical acaricides, including ivermectin; however, cattle tick populations resistant to ivermectin have recently been reported in Brazil, Mexico, and Uruguay. Currently, the molecular basis for ivermectin susceptibility and resistance are not well understood in R. microplus. This prompted us to search for potential molecular targets for ivermectin. Here, we report the cloning and molecular characterization of a R. microplus glycine-like receptor (RmGlyR) gene. The characterized mRNA encodes for a 464-amino acid polypeptide, which contains features common to ligand-gated ion channels, such as a large N-terminal extracellular domain, four transmembrane domains, a large intracellular loop and a short C-terminal extracellular domain. The deduced amino acid sequence showed around 30% identity to GlyRs from some invertebrate and vertebrate organisms. The polypeptide also contains the PAR motif, which is important for forming anion channels, and a conserved glycine residue at the third transmembrane domain, which is essential for high ivermectin sensitivity. PCR analyses showed that RmGlyR is expressed at egg, larval and adult developmental stages. Our findings suggest that the deduced receptor is an additional molecular target to ivermectin and it might be involved in ivermectin resistance in R. microplus.
EDP Sciences
2014
Artículo
Parasite 2014, 21, 43
Inglés
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Flores-Fernández, J. M., Gutiérrez-Ortega, A., Padilla-Camberos, E., Rosario-Cruz, R., Hernández-Gutiérrez, R., & Martínez-Velázquez, M. (2014). Molecular cloning and characterization of a glycine-like receptor gene from the cattle tick Rhipicephalus (Boophilus) microplus (Acari: Ixodidae). Parasite, 21.
BIOLOGÍA Y QUÍMICA
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