Distribution of neuropeptides in the antennal lobes of male Spodoptera littoralis

Olfaction is an important sensory modality that regulates a plethora of behavioural expressions in insects. Processing of olfactory information takes place in the primary olfactory centres of the brain, namely the antennal lobes (ALs). Neuropeptides have been shown to be present in the olfactory sys...

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Bibliographic Details
Published in:Cell and tissue research 2013-11, Vol.354 (2), p.431-440
Main Authors: Kromann, Sophie H, Hansson, Bill S, Ignell, Rickard
Format: Article
Language:English
Subjects:
allatostatin
allatotropin
Analysis
Animals
Antennal lobe
Arthropod Antennae - chemistry
Arthropod Antennae - ultrastructure
Biomedical and Life Sciences
Biomedicine
Brain
Cytochemistry
FMRFamide - analysis
Human Genetics
Immunohistochemistry
Insect Hormones - analysis
insects
interneurons
Male
Molecular Medicine
Moths
Neurons
Neuropeptides
Neuropeptides - analysis
Proteomics
Regular Article
Signal transduction
smell
Spodoptera - chemistry
Spodoptera - ultrastructure
Spodoptera littoralis
Structural Biology
Strukturbiologi
Tachykinins - analysis
Zoologi
Zoology
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Summary:Olfaction is an important sensory modality that regulates a plethora of behavioural expressions in insects. Processing of olfactory information takes place in the primary olfactory centres of the brain, namely the antennal lobes (ALs). Neuropeptides have been shown to be present in the olfactory system of various insect species. In the present study, we analyse the distribution of tachykinin, FMRFamide-related peptides, allatotropin, allatostatin, myoinhibitory peptides and SIFamide in the AL of the male Egyptian cotton leafworm, Spodoptera littoralis. Immunocytochemical analyses revealed that most neuropeptides were expressed in different subpopulations of AL neurons. Their arborisation patterns within the AL suggest a significant role of neuropeptide signalling in the modulation of AL processing. In addition to local interneurons, our analysis also revealed a diversity of extrinsic peptidergic neurons that connected the antennal lobe with other brain centres. Their distributions suggest that extrinsic neurons perform various types of context-related modulation.
ISSN:0302-766X
1432-0878
1432-0878
DOI:10.1007/s00441-013-1703-x