Role of a tachykinin-related peptide and its receptor in modulating the olfactory sensitivity in the oriental fruit fly, Bactrocera dorsalis (Hendel). (January 2017)

• Record Type: Journal Article
• Authors: Gui, Shun-Hua; Jiang, Hong-Bo; Xu, Li; Pei, Yu-Xia; Liu, Xiao-Qiang; Smagghe, Guy; Wang, Jin-Jun
• Is Part Of: Insect biochemistry and molecular biology. Volume 80(2017:Jan.)
• Page Start: 71
• Page End: 78
• Publication Date: 2017-01
• Subjects: Oriental fruit fly -- Bactrocera dorsalis -- Neuropeptide -- Tachykinin-related peptide -- G-protein coupled-receptor -- Olfaction; Insect biochemistry -- Periodicals; Insects -- Physiology -- Periodicals; Insects -- Molecular aspects -- Periodicals; Biochemistry -- Periodicals; Insectes -- Biochimie -- Périodiques; Insectes -- Composition -- Périodiques; Insectes -- Physiologie -- Périodiques; Insectes -- Aspect moléculaire -- Périodiques; Biochimie -- Périodiques; Biochemistry; Insect biochemistry; Insects -- Molecular aspects; Insects -- Physiology; Periodicals; 572.8157
• DOI: 10.1016/j.ibmb.2016.12.002
• Languages: English
• ISSNs: 0965-1748

Abstract

Abstract: Insect tachykinin-related peptide (TRP), an ortholog of tachykinin in vertebrates, has been linked with regulation of diverse physiological processes, such as olfactory perception, locomotion, aggression, lipid metabolism and myotropic activity. In this study, we investigated the function of TRP (BdTRP) and its receptor (BdTRPR) in an important agricultural pest, the oriental fruit fly Bactrocera dorsalis . BdTRPR is a typical G-protein coupled-receptor (GPCR), and it could be activated by the putative BdTRP mature peptides with the effective concentrations (EC50 ) at the nanomolar range when expressed in Chinese hamster ovary cells. Consistent with its role as a neuromodulator, expression of BdTRP was detected in the central nervous system (CNS) of B. dorsalis, specifically in the local interneurons with cell bodies lateral to the antennal lobe. BdTRPR was found in the CNS, midgut and hindgut, but interestingly also in the antennae. To investigate the role of BdTRP and BdTRPR in olfaction behavior, adult flies were subjected to RNA interference, which led to a reduction in the antennal electrophysiological response and sensitivity to ethyl acetate in the Y-tube assay. Taken together, we demonstrate the impact of TRP/TRPR signaling on the modulation of the olfactory sensitivity in B. dorsalis . The result improve our understanding of olfactory processing in this agriculturally important pest insect. Abstract graphical: Highlights: A tachykinin-related peptide precursor (TRP) and its receptor (TRPR) were molecularly characterized in Bactrocera dorsalis. Functionality of BdTRPR was confirmed through heterologous expression and an in vitro assay. BdTRP and BdTRPR expression and BdTRP localization suggest that TRP plays a neuromodulatory role. The TRP/TRPR signaling modulates the olfactory sensitivity to avoid aversive odors in B. dorsalis.