The existence of Merkel cells in the lingual connective tissue of the Surinam caiman, Caiman crocodilus crocodilus (Order crocodilia)

Citation
S. Yoshie et al., The existence of Merkel cells in the lingual connective tissue of the Surinam caiman, Caiman crocodilus crocodilus (Order crocodilia), ARCH HIST C, 62(1), 1999, pp. 97-106
Citations number
48
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Medical Research Diagnosis & Treatment
Journal title
ARCHIVES OF HISTOLOGY AND CYTOLOGY
ISSN journal
0914-9465 → ACNP
Volume
62
Issue
1
Year of publication
1999
Pages
97 - 106
Database
ISI
SICI code
0914-9465(199903)62:1<97:TEOMCI>2.0.ZU;2-B
Abstract
The tongue of the Surinam caiman (a reptilian species) was studied by light microscopy including immunohistochemistry for protein gene product 9.5 (PG P 9.5), and transmission electron microscopy. The connective tissue immedia tely under taste buds housed a cluster of cells immunoreactive for PGP 9.5. These cells synapsed on nerves, and their cytoplasm contained characterist ic granules of 90 nm in the mean diameter, glycogen particles, and bundles of intermediate filaments. In light of these ultrastructural features, they were identified as Merkel cells. The Merkel cells were also surrounded by Schwann cells. These findings indicate that the present Merkel cell-neurite -Schwann cell complex is comparable to the avian Merkel corpuscle. On the b asis of the granule localization in the cytoplasm, the caiman Merkel cell w as presumed to be involved in not only mechanoreception but also endocrine or paracrine functions.