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Thyroidectomy and thyroxine administration alter serum calcium levels in rat
K O Adeniyi1, O O Ogunkeye, C O Isichei
1Department of Human Physiology, Faculty of Medical Sciences, University of Jos, Nigeria.
Acta Physiologica Hungarica
|January 1, 1993
Summary
Thyroidectomy lowered serum calcium in rats, while thyroxine administration increased it. These findings indicate that both procedures significantly impact calcium metabolism.
Area of Science:
- Endocrinology
- Calcium Metabolism
- Thyroid Hormone Regulation
Background:
- Serum calcium homeostasis is crucial for physiological functions.
- The thyroid gland and its hormones play a role in regulating calcium levels.
- Understanding these regulatory mechanisms is vital for metabolic research.
Purpose of the Study:
- To investigate the impact of thyroidectomy on serum calcium concentration.
- To determine the effect of exogenous thyroxine administration on serum calcium levels.
- To elucidate the relationship between thyroid function and calcium metabolism in rats.
Main Methods:
- Adult albino Wistar rats were subjected to thyroidectomy.
- Serum calcium concentrations were measured using a specific assay.
- Rats received chronic administration of thyroxine at a dose of 6-8 micrograms/100 g body weight/day for 35 days.
Main Results:
- Thyroidectomy resulted in a significant decrease in serum calcium from 2.28 +/- 0.02 mmol/l to 1.61 +/- 0.01 mmol/l.
- Chronic thyroxine administration led to a significant increase in serum calcium from 2.28 +/- 0.02 mmol/l to 2.98 +/- 0.05 mmol/l.
- The observed changes highlight the influence of thyroid status on serum calcium.
Conclusions:
- Thyroidectomy adversely affects serum calcium levels in rats.
- Exogenous thyroxine administration effectively increases serum calcium concentrations.
- These results confirm that thyroidectomy and thyroxine significantly influence calcium metabolism in rats.
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