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Oxidative stress and transferrin receptor recycling
W Malorni1, F Iosi, M T Santini
1Department of Ultrastructures, Istituto Superiore di Sanità, Rome, Italy.
Cytotechnology
|January 1, 1993
Summary
Oxidative stress from menadione rapidly down-modulates the transferrin receptor by blocking its recycling to the cell surface. This occurs without impacting the receptor's binding affinity, offering new insights into cellular oxidative balance.
Area of Science:
- Cell biology
- Biochemistry
- Oxidative stress research
Background:
- Oxidative balance perturbation is crucial in pathology and physiology, affecting receptor activity.
- Menadione is a known inducer of oxidative stress.
- The transferrin receptor plays a key role in cellular iron uptake.
Purpose of the Study:
- To investigate the influence of menadione-induced oxidative stress on membrane receptor processes.
- Specifically, to examine the effects on the transferrin receptor.
Main Methods:
- Biochemical assays
- Biophysical techniques
- Ultrastructural analysis
- Studies conducted on various cell lines
Main Results:
- Oxidative stress induced by menadione caused a rapid and specific down-modulation of the membrane transferrin receptor.
- The mechanism involves a block in receptor recycling to the cell surface.
- Transferrin receptor binding affinity remained unaffected.
Conclusions:
- Oxidative stress can rapidly alter membrane receptor function.
- The transferrin receptor is susceptible to oxidative stress-induced modulation.
- Blocking receptor recycling is a key mechanism in this process.