Related Experiment Video
Updated: Jul 12, 2026

Establishment of a Simple and Effective Rat Model for Intraoperative Parathyroid Gland Imaging
Published on: August 17, 2022
Activity of thyroid parafollicular (C) cells in rats with hyperthyroidism--immunohistochemical investigations
J Dadan1, R L Zbucki, B Sawicki
11st Department of General and Endocrinological Surgery, Medical University of Białystok, Poland. klchirog@amb.edu.pl
Abstract:
The aim of this study was an evaluation of the activity of parafollicular (C) cells in a rat experimental model of hyperthyroidism, evoked by an intraperitoneal application of L-thyroxine (40 mg/kg daily) over 15 days. For that reason, immunohistochemical investigations and evaluation of calcitonin (CT) plasma concentrations were performed. Differences in the quantity and distribution, together with enhanced CT-immunoreactivity of C cells, were observed in hyperthyroid rats, in comparison to respective values in the control group, accompanied by a significant diminution of plasma TSH and CT levels. Our preliminary study may point to a functional interaction between follicular and parafollicular cells in the thyroid gland.
Related Concept Videos
The Thyroid Gland
The follicles have a central cavity lined by simple cuboidal to squamous epithelial cells called follicular cells. These cells produce the glycoprotein...
Synthesis and Regulation of Thyroid Hormones
Upon reaching the thyroid gland, TSH stimulates the follicular cells' active uptake of iodide ions from the blood. The ions diffuse to the apical surface of the cells and are oxidized to iodine. The iodine is then...
The Parathyroid Glands
Oxyphil cells, whose functions remain elusive, emerge during late puberty, adding a layer of complexity to the parathyroid gland's intricacies. In contrast, principal parathyroid cells undertake a vital role by producing...
Hyperthyroidism I: Introduction
Hyperthyroidism II: Pathophysiology
Graves Disease II: Pathophysiology

