What question did this study set out to answer?

To determine the mechanisms by which iron administration regulates the rate of synthesis, assembly, and degradation of ferritin in rat liver.

August 1, 1966Journal of Biological ChemistryOpen Access

Regulation of Synthesis and Turnover of Ferritin in Rat Liver

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Authors

JDJames W. DrysdaleUniversity of Oxford HMHamish N. MunroBoston University

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Implication

In vivo animal study reveals iron stimulates ferritin accumulation and slows degradation in rat liver, indicating post-transcriptional stabilization regulates ferritin turnover.

Key Points

To determine the mechanisms by which iron administration regulates the rate of synthesis, assembly, and degradation of ferritin in rat liver.
Injected rats intraperitoneally with iron and administered pulse doses of [14C]leucine at varied time points, evaluating the effect of actinomycin D on ferritin synthesis.
Tracked the clearance of radioactivity from liver ferritin over a 72-hour period following repeated iron injections to assess protein turnover.
Fractionated liver ferritin using sucrose density gradients to monitor label distribution across ferritin species with differing iron content.
Iron administration induced a rapid, dose-dependent, and transient uptake of [14C]leucine into ferritin without altering general liver protein synthesis, remaining insensitive to actinomycin D.
Newly synthesized ferritin fractions were initially iron-poor, with radiolabel progressively shifting into denser, iron-rich fractions over the 72-hour period.
Repeated iron injections raised the iron-to-protein ratio and slowed the loss of radioactivity, demonstrating that iron-rich ferritin resists intracellular degradation compared to iron-poor forms.

Cite This Study

Drysdale et al. (1966) studied this question.

synapsesocial.com/papers/6a702eb226a7f98052dcb073 https://doi.org/10.1016/s0021-9258(18)99877-7

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Implication

In vivo animal study reveals iron stimulates ferritin accumulation and slows degradation in rat liver, indicating post-transcriptional stabilization regulates ferritin turnover.

Regulation of Synthesis and Turnover of Ferritin in Rat Liver

Discussion

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Implication

Key Points

Cite This Study

Regulation of Synthesis and Turnover of Ferritin in Rat Liver

Discussion

Member takes

Implication

Key Points

Cite This Study

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