Abstract：
:To date only peptidergic innervation has been described in the alimentary tract of barnacles. In the present work the presence and distribution of choline acetyltransferase (ChAT), the acetylcholine (ACh) synthesizing enzyme, was investigated by immunohistochemistry in the alimentary tract of the adult barnacle Balanus amphitrite. Numerous ChAT-immunoreactive (IR) cells and a net of ChAT-IR cytoplasmic processes were localized inside the epithelium of the posterior midgut, close to the basement membrane; no IR nerve endings were detected in the midgut longitudinal and circular muscle bundles. Epithelial neurons or endocrine cells in the gut epithelium have been described in some invertebrate species belonging to different taxa and their peptidergic features are reported in the literature. Our results point out the presence of neuroepithelial cells also in the gut epithelium of barnacles; moreover, for the first time, a cholinergic feature is suggested for this cell type. These data seem to indicate the involvement of ACh in the gut functions of barnacle and suggest that the barnacle alimentary tract is more complex than previously thought and requires further study.
journal_name
Neurosci Lettjournal_title
Neuroscience lettersauthors
Gallus L,Ferrando S,Bottaro M,Girosi L,Ramoino P,Diaspro A,Aluigi MG,Tagliafierro Gdoi
10.1016/j.neulet.2006.09.050subject
Has Abstractpub_date
2006-12-06 00:00:00pages
230-3issue
3eissn
0304-3940issn
1872-7972pii
S0304-3940(06)01013-5journal_volume
409pub_type
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