Publication: Ultrastructure and lectin cytochemistry
of secretory cells in lingual glands of the
Japanese quail (Coturnix coturnix japonica)
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Date
2009
Authors
Capacchietti, M. ; Sabbieti, M.G. ; Agas, D. ; Materazzi, S. ; Menghi, Giovanna ; Marchetti, L.
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Publisher
Murcia : F. Hernández
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DOI
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info:eu-repo/semantics/article
Description
Abstract
In the present study, as continuation of our
previous research, Japanese quail (Coturnix coturnix
japonica) lingual glands were investigated by means of
transmission electron microscopy (TEM) to understand
the cytoarchitecture and the subcellular sugar
distribution within the different secretory structures.
Indeed, glycosidic residues were visualized by applying
an indirect technique of binding and the terminal
sialoglycoconjugate sequences were characterized by
employing sialidase digestion combined with lectin
affinity. The ultrastructural analysis revealed an unusual
cytoarchitecture of the caudal portion of anterior lingual
gland that was composed of both secretory cells, filled
with granules, and non-secretory cells, filled with
mitochondria. Conversely, the posterior lingual gland
was composed of secretory units of lingual glands only
containing mucous cells filled with secretory granules
with a variable morphology, including bipartite features
characterized by an electron-lucent matrix and one or
more electron-dense areas. Actual findings further
supported that the quail lingual glands produce
sialoglycoconjugates characterized by a heterogeneous
composition. In conclusion, the cytological
characteristics and the carbohydrate composition of quail
lingual glands suggest that, analogously to mammal
salivary glands, avian lingual glands could also be
involved in several functions that can be correlated with
the occurrence of sialic acids.
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