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| Author(s): |
Alberto Moura Mendes Lopes
Total Authors: 1
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| Document type: | Master's Dissertation |
| Press: | Campinas, SP. |
| Institution: | Universidade Estadual de Campinas (UNICAMP). Instituto de Biologia |
| Defense date: | 2013-08-16 |
| Examining board members: |
Ana Maria Lima de Azeredo Espin;
Gustavo Adolfo Sabatini;
Karina Lucas Silva Brandão
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| Advisor: | Ana Maria Lima de Azeredo Espin |
| Abstract | |
Brazil has the largest commercial cattle herd in the world, being one of the most important sectors of income generation for the country. Infestations by ecto- and endo parasites are among the major problems that lead to low productivity. Among them, the Cochliomyia hominivorax (Coquerel), known as the New World Screwworm fly, stands out as a major cause of myiasis, resulting in losses of approximately US$ 1.7 billion each year to the country. Systemic products such as macrocyclic lactones/macrolactones (MLs), mainly the MLs member ivermectin, have been extensively used as a preventive measure and treatment in infestations by C. hominivorax and various parasites, and the intense/prolonged use of macrocyclic lactones have led to the emergence of resistance to such products. The macrolactones target-sites are the cys-loop ligand-gated ion channels receptors, specially the glutamate-gated chloride channel subunit (GLUCL?). The identification of the molecular mechanisms of macrocyclic lactones resistance in other species indicates that possible alterations in chloride channels and GLYR? and nAchR?7 are associated with macrolactones resistance in C. hominivorax. Using the glutamate-gated chloride channel subunit sequences from other species, previously deposited in the database, and sequences obtained in the characterization of the transcriptome of C. hominivorax, the aim of this project was to amplify and sequence the coding region of the glutamate-gated chloride channel subunit gene (GluCl?) in C. hominivorax. In addition, sequences will be compared among putative ivermectin resistant and susceptible individuals in order to identify mutation(s) conferring resistance to such product and thereby the molecular diagnosis of resistance (AU) | |
| FAPESP's process: | 11/01030-5 - Characterization of the gene coding for the alpha subunit of the channel chlorine (GluClalpha) possibly associated with resistance to macrocyclic lactones in Cochliomyia hominivorax (Diptera: Calliphoridae) |
| Grantee: | Alberto Moura Mendes Lopes |
| Support Opportunities: | Scholarships in Brazil - Master |