Acaricidal action of destruxins produced by a marine-derived Beauveria felina on the bovine tick Rhipicephalus (Boophilus) microplus

Autor(es)

Morais-Urano, Raquel P. ^[1] ; Chagas, Ana C. S. ^[2] ; Berlinck, Roberto G. S. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Quim Sao Carlos, Sao Carlos, SP - Brazil

^[2] Empresa Brasileira Pesquisa Agr EMBRAPA, Embrapa Pecuaria Sudeste, Lab Sanidade Anim, Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Experimental Parasitology; v. 132, n. 3, p. 362-366, NOV 2012.
• Citações Web of Science: 5

Resumo

The increasing resistance of Rhipicephalus (Boophilus) microplus tick to commercial insecticides requires alternative methods for the control of this cattle plague. The enthomopathogenic fungus Beauveria feline produces destruxins in culture media, cyclic depsipeptides which display an array of biological activities. The present investigation aimed to evaluate the acaricide action of destruxins isolated from B. felina culture media on R. (B.) microplus engorged females. B. felina was grown in MF medium under 19 different growth conditions. HPLC-PDA analysis of chromatographic fractions obtained from the 19 different growth media extracts indicated the presence of destruxins in all lipophylic fractions. Such fractions were combined and subjected to separation by HPLC. Fractions containing distinct destruxins composition were tested against R. (B.) micro plus. Two fractions, composed of destruxin Ed(1) and pseudodestruxin B and/or pseudodestruxin C (fraction P1) as well as by hydroxyhomodestruxin B and/or destruxin D and/or roseotoxin C (fraction P7), displayed 30% and 28.7% acaricidal efficacy, respectively. This activity profile in such low concentration is adequate to consider destruxins as potential leading compounds to be developed for tick biological control. (C) 2012 Elsevier Inc. All rights reserved. (AU)

• Processo FAPESP: 10/50190-2 - Investigação do potencial biotecnológico e metabólico de organismos marinhos para processos de biorremediação e produção de substâncias com atividades anti-virais, anti-leishmania e anti-inflamatória (Biodiversidade Marinha)
• Beneficiário: Roberto Gomes de Souza Berlinck
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOTA - Temático