Desiccation, thermal stress and associated mortality in Drosophila fruit flies induced by neuropeptide analogue treatment

Alford, L., Marley, R., Dornan, A. , Dow, J. A.T. , Nachman, R. J. and Davies, S. A. (2019) Desiccation, thermal stress and associated mortality in Drosophila fruit flies induced by neuropeptide analogue treatment. Journal of Pest Science, 92, pp. 1123-1137. (doi: 10.1007/s10340-019-01100-0)

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Drosophila suzukii is a serious pest of soft fruit worldwide. With the global over-dependence on broad-spectrum pesticides, a strong imperative exists for more environmentally friendly and targeted methods of control. One promising avenue involves employing synthetic neuropeptide analogues as insecticidal agents to reduce pest fitness. Neuropeptides, central to the regulation of physiological and behavioural processes, play a vital role in cold and desiccation survival. Building upon this, the current study investigated the effects of biostable kinin, the cardioacceleratory peptide CAP2b and pyrokinin (PK) analogues (the latter of which have previously displayed cross-talk with the capa receptor), on desiccation, starvation and cold stress tolerance of the pest, D. suzukii, and the closely related non-pest, D. melanogaster. Results demonstrated analogues of the superfamily (CAP2b and PK derived) significantly impacted survival of the target insect under conditions of desiccation stress. However, these peptides enhanced desiccation stress survival in relation to controls, suggesting that they may act as antagonists of the capa signalling pathway in the Malpighian tubules. Of particular note was the ability of analogues 1895 (2Abf-Suc-FGPRLa) and 1902 (2Abf-Suc-FKPRLa) to impact D. suzukii but not D. melanogaster. A focus on native Drosophila CAP2b/PK and kinin sequences in analogue development may yield pure agonists with diuretic action that may reduce desiccation stress survival in the pest flies. In highlighting the PRXamide neuropeptide superfamily more generally, and the structures of promising analogues more specifically, this research will feed the evolution of next-generation analogues and drive forward the development of neuropeptidomimetic-based agents.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Dow, Professor Julian and Marley, Dr Richard and Dornan, Dr Anthony and Alford, Dr Lucy and Davies, Professor Shireen
Authors: Alford, L., Marley, R., Dornan, A., Dow, J. A.T., Nachman, R. J., and Davies, S. A.
College/School:College of Medical Veterinary and Life Sciences > Institute of Molecular Cell and Systems Biology
Journal Name:Journal of Pest Science
ISSN (Online):1612-4766
Published Online:14 March 2019
Copyright Holders:Copyright © 2019 The Authors
First Published:First published in Journal of Pest Science 92:1123-1137
Publisher Policy:Reproduced under a Creative Commons License

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
664541nEUROSTRESSPEPShireen DaviesEuropean Commission (EC)634361RI MOLECULAR CELL & SYSTEMS BIOLOGY