Detoxifying pathways of mosquitoes against the neem (Azadirachta indica) extracts are still unclear. The aim of the present study was to investigate the role of adenosine triphosphate-binding cassette (ABC) transporters in this process in Anopheles stephensi, one of the main malaria vectors in southern Asia. Third-stage larvae of An. stephensi were fed with fish food alone or in combination with neem extract at 0.5%, 1%, 5%, and 10%. Six ABC-transporter genes from 3 different subfamilies (B, C, and G) were analyzed to assess their relative expression compared with controls. A bioassay was also performed to assess larval mortality rate at different concentrations and in combination with verapamil, an ABC-transporter inhibitor. No significant variation in the expression levels of any transporter belonging to the B, C, and G subfamilies was detected. Furthermore, the use of verapamil did not induce an increase in mortality at any of the tested neem extract concentrations, indicating that ABC transporters are not involved in the detoxification of neem extracts in An. stephensi larvae.

Adenosine Triphosphate–Binding Cassette Transporters Are Not Involved In the Detoxification of Azadirachta indica Extracts In Anopheles stephensi Larvae / M. Ferrari, A. Negri, C. Romeo, I.V. Boccazzi, R. Nodari, A. Habluetzel, G. Molteni, Y. Corbett. - In: JOURNAL OF THE AMERICAN MOSQUITO CONTROL ASSOCIATION. - ISSN 8756-971X. - 34:4(2018 Dec), pp. 311-314. [10.2987/18-6779.1]

Adenosine Triphosphate–Binding Cassette Transporters Are Not Involved In the Detoxification of Azadirachta indica Extracts In Anopheles stephensi Larvae

Ferrari, Marco;Negri, Agata;Romeo, Claudia;Boccazzi, Ilaria Varotto;NODARI, RICCARDO;Molteni, Giorgio;Corbett, Yolanda
2018-12

Abstract

Detoxifying pathways of mosquitoes against the neem (Azadirachta indica) extracts are still unclear. The aim of the present study was to investigate the role of adenosine triphosphate-binding cassette (ABC) transporters in this process in Anopheles stephensi, one of the main malaria vectors in southern Asia. Third-stage larvae of An. stephensi were fed with fish food alone or in combination with neem extract at 0.5%, 1%, 5%, and 10%. Six ABC-transporter genes from 3 different subfamilies (B, C, and G) were analyzed to assess their relative expression compared with controls. A bioassay was also performed to assess larval mortality rate at different concentrations and in combination with verapamil, an ABC-transporter inhibitor. No significant variation in the expression levels of any transporter belonging to the B, C, and G subfamilies was detected. Furthermore, the use of verapamil did not induce an increase in mortality at any of the tested neem extract concentrations, indicating that ABC transporters are not involved in the detoxification of neem extracts in An. stephensi larvae.
Detoxification; mosquito defenses; natural insecticides; neem tree; vector control
Settore VET/06 - Parassitologia e Malattie Parassitarie degli Animali
Controllo simbiotico di zanzare vettrici: dal laboratorio al campo.
JOURNAL OF THE AMERICAN MOSQUITO CONTROL ASSOCIATION
Article (author)
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/609747
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