Abstract
In dog thyroid glands there are C cell follicles which are lined solely by C cells and which accumulate a colloidlike substance in the luminal cavities. In order to clarify the properties of the colloidlike substance secreted by C cells, the C cell follicles were stained with PAS reaction and immunoperoxidase method using anticalcitonin, anti‐C‐thyroglobulin, and anti‐19S‐thyroglobulin antisera, respectively. The colloidlike substance was PAS positive and revealed the strong immunoreaction for C‐thyroglobulin but a faint reaction for calcitonin. It was nonreactive with anti‐19‐thyroglobulin antiserum. These results confirm that C cells synthesize the glycoprotein immunoreactive to anti‐C‐thyroglobulin antiserum in addition to calcitonin and can store it in the follicular lumens.

This publication has 14 references indexed in Scilit: