Key result
Hypophysectomy-induced cardiac atrophy in rats was associated with reduced protein synthesis due to lower RNA content, which was restored by treatment with growth hormone and thyroxine.
Why the study?
Does hypophysectomy and subsequent treatment with growth hormone and thyroxine alter protein turnover in the rat heart?
Population
Normal and hypophysectomized rats
Comparison
Hypophysectomy, followed by treatment with… vs Normal rats
Design
Preclinical
Authors
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Hypothesis-generating in rats; leaves open whether similar RNA-protein mechanisms apply to human cardiac atrophy or GH therapy.
Does hypophysectomy and subsequent treatment with growth hormone and thyroxine alter protein turnover in the rat heart?
This preclinical study demonstrates that cardiac atrophy following hypophysectomy is driven by reduced protein synthesis due to lower RNA content, a process that can be reversed by growth hormone and thyroxine replacement.
Hjalmarson et al. (1975) studied Cardiac atrophy. Hypophysectomy, growth hormone, and thyroxine vs. Normal rats was evaluated on Protein synthesis and degradation rates in heart. Hypophysectomy-induced cardiac atrophy in rats was associated with reduced protein synthesis due to lower RNA content, which was restored by treatment with growth hormone and thyroxine.
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