Background: Iron uptake through the transferrin-dependent pathway is essential for osteoclast differentiation. Results: Knocking down the expression of Steap4, an endosomal ferrireductase, inhibits osteoclast formation and decreases cellular iron and ROS production. Conclusion: Steap4 regulates cellular iron metabolism during osteoclast differentiation. Significance: This work provides new insights into the molecular mechanisms regulating cellular iron metabolism in osteoclast lineage cells.
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