Related Experiment Video
Updated: Sep 25, 2026

Generation of Hypoparathyroid Rats via Carbon-Nanoparticle-Assisted Parathyroidectomy
Published on: July 14, 2023
Sevelamer hydrochloride, a calcium-free phosphate binder, inhibits parathyroid cell proliferation in partially
Nobuo Nagano1, Sonoe Miyata, Sachiko Obana
1Pharmaceutical Development Laboratories, Kirin Brewery Co, Ltd, Takasaki, Japan. n-nagano@kirin.co.jp
Background:
Secondary hyperparathyroidism characterized by hyperplasia of the parathyroid gland (PTG) is a consequence of chronic renal insufficiency (CRI). Dietary phosphate restriction and sevelamer hydrochloride, a calcium-free phosphate binder, suppress parathyroid hormone (PTH) secretion and PTG hyperplasia in experimental animals with CRI, independently of serum calcium and 1,25(OH)(2)D(3) concentrations. In the present study, the effect of sevelamer on PTG cell proliferation in rats with CRI was investigated.
Methods:
Seven weeks after a 5/6 nephrectomy, rats were fed a diet containing 0, 1 or 3% sevelamer for 4 weeks, and sham-operated rats were fed a normal diet. Serum calcium, phosphorus, PTH and 1,25(OH)(2)D(3) concentrations were measured. The number of cells positive for proliferating cell nuclear antigen (PCNA) in the maximal two-dimensional PTG area was counted at the end of study.
Results:
Sevelamer inhibited increases in serum phosphorus, calcium-phosphorus product and PTH concentrations without affecting serum calcium or 1,25(OH)(2)D(3). Sevelamer also suppressed the maximal PTG area and PCNA-positive cells. There was also a strong correlation between the maximal PTG area and serum PTH concentration, and between PCNA-positive cells and the maximal PTG area, as well as between serum phosphorus concentration and PCNA-positive cells.
Conclusions:
These results indicate that sevelamer treatment reduces serum phosphorus concentration and could inhibit PTG cell proliferation and prevent PTG hyperplasia.
More Related Videos
Related Concept Videos
Hormones and Bone Tissue
Hormones That Influence Osteoblasts and/or Maintain the Matrix
Several hormones are necessary for controlling bone growth and maintaining the bone matrix. The pituitary gland secretes growth hormone (GH), which, as its name implies, controls bone growth. This happens in several ways: first, it triggers chondrocyte...
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...
Roles of Electrolytes: Calcium and Phosphate
The calcium concentration in blood plasma is primarily regulated...
Synthesis and Functions of Calcitonin
The exact mechanisms by which calcitonin operates in calcium homeostasis remain elusive, but its significance is evident in several vital...
Skeleton and Calcium Homeostasis
Drug Distribution: Tissue Binding
For...

