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Microbial activity plays a pivotal role in the biogeochemical cycling of iron and manganese, especially at the redox gradients characteristic of stratified aquatic environments. These cycles are driven by microbial transformations between oxidized and reduced forms of the metals, allowing organisms to exploit them for metabolic energy and structural purposes.Iron Cycling Across Redox GradientsIn neutral, oxygen-rich surface waters, iron is predominantly found in its oxidized, insoluble ferric...
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A Colorimetric Method for Measuring Iron Content in Plants
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Iron is essential for living!

Sigismond Lasocki, Thomas Gaillard, Emmanuel Rineau

    Critical Care (London, England)
    |February 13, 2015
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    Summary
    This summary is machine-generated.

    Silencing hepcidin in lung cells worsened acute lung injury by releasing iron, boosting bacterial growth. This highlights hepcidin

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    Area of Science:

    • Cellular iron metabolism
    • Pulmonary immunology
    • Acute lung injury research

    Background:

    • Iron is vital but toxic, causing oxidative stress.
    • Hepcidin regulates systemic iron, but local roles are less understood.

    Purpose of the Study:

    • Investigate local hepcidin function in airway epithelial cells.
    • Determine hepcidin's role in acute lung injury and iron release.

    Main Methods:

    • Mouse model of acute lung injury.
    • Targeted silencing of hepcidin in airway epithelial cells.
    • Analysis of iron release from alveolar macrophages.

    Main Results:

    • Local hepcidin silencing aggravated lung injury.
    • Increased iron release from alveolar macrophages observed.
    • Enhanced pulmonary bacterial growth and reduced macrophage killing capacity.

    Conclusions:

    • Hepcidin has critical local functions in lung iron regulation.
    • Local and systemic iron regulation may be independent.
    • Potential therapeutic targets for sepsis and anemia.