Calbindin D28k-like immunoreactivity in the gustatory epithelium in the rat.
The distribution of calbindin D28k (CB)-like immunoreactivity (-LI) in the gustatory epithelium was examined in the adult rat. In the circumvallate and foliate papillae, CB-like immunoreactive (-IR) nerve fibers were observed in the subgemmal region, and some of these penetrated the taste buds. Two or three spindle-shaped gustatory cells displayed CB-LI in each taste bud of these lingual papillae; the immunoreactivity was restricted to the cytoplasm. In the fungiform papilla, CB-IR nerve fibers were detected in the subgemmal region, but no CB-IR cells were observed in the taste buds of the fungiform papillae. In the taste buds of the incisive papillae, many CB-IR intragemmal nerve fibers were observed, but no apparent CB-IR cells were detected. In the soft palate, CB-IR nerve fibers associated with the taste buds were also observed, but no CB-IR cells were detected in the taste buds. The present findings indicate that CB-IR gustatory cells were only localized in the taste buds in the posterior lingual papillae (circumvallate and foliate papillae), but not in the taste buds in other gustatory epithelium.
Miyawaki
Y
Y
Department of Oral Anatomy and Developmental Biology, Osaka University Faculty of Dentistry, Japan.
Morisaki
I
I
Tabata
M J
MJ
Kurisu
K
K
Wakisaka
S
S
D000818:Animals; D064092:Calbindin 1; D064026:Calbindins; D004847:Epithelial Cells; D004848:Epithelium / Q000294:innervation / Q000378:metabolism; D007150:Immunohistochemistry; D008297:Male; D009412:Nerve Fibers / Q000378:metabolism; D010160:Palate, Soft / Q000294:innervation; D051381:Rats; D017207:Rats, Sprague-Dawley; D064030:S100 Calcium Binding Protein G / Q000378:metabolism*; D013650:Taste Buds / Q000378:metabolism; D014018:Tissue Distribution; D014059:Tongue / Q000166:cytology / Q000294:innervation / Q000378:metabolism*
C576500:Calb1 protein, rat; D064092:Calbindin 1; D064026:Calbindins; D064030:S100 Calcium Binding Protein G