Neuropeptides in the antennal lobe of the yellow fever mosquito, Aedes aegypti.
Bottom Line: The most diverse and versatile neurochemicals in the insect nervous system are found in the neuropeptides.Allatostatin A, allatotropin, SIFamide, FMRFamide-related peptides, short neuropeptide F, myoinhibitory peptide, and tachykinin-related peptides were found to be expressed in local interneurons and extrinsic neurons of the antennal lobe.Building on these results, we discuss the possible role of neuropeptide signaling in the antennal lobe of Ae. aegypti.
Affiliation: Unit of Chemical Ecology, Department of Plant Protection Biology, Swedish University of Agricultural Sciences, 230 53, Alnarp, Sweden.Show MeSH
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Mentions: Immunolabeling with AST-A antiserum was observed in 12–16 local interneurons (LNs), with cell bodies located lateral to the AL (Fig. 2B). The LNs innervated the ventral (V1 and V3; nomenclature according to Ignell et al., 2005) and anteromedial glomeruli (AM1–AM5) with thin branches, whereas other glomeruli appeared to receive little or no innervation (Fig. 2B–G). Moreover, we observed an extrinsic neuron innervating each AL. The cell bodies of these neurons were located ipsilaterally in the anterior part of the subesophageal ganglion (SOG) (Fig. 2A, arrow). These neurons innervated the ALs with sparse arborization of fibers with large varicosities (Fig. 2) restricted to the Johnston’s organ center (Fig. 2A), and the mediodorsal glomeruli innervated by maxillary palp OSNs (data not shown). We observed a process of this neuron extending outside the AL but were not able to trace the projection of it.
Affiliation: Unit of Chemical Ecology, Department of Plant Protection Biology, Swedish University of Agricultural Sciences, 230 53, Alnarp, Sweden.