Iron Chelation
Iron Chelation - Related Videos
05:36
Quantifiable and Inexpensive Cell-Free Fluorescent Method to Confirm the Ability of Novel Compounds to Chelate Iron
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Cited by 1 •
2024
We describe a fluorescent assay that can quickly and inexpensively confirm the ability of novel compounds to chelate iron. The assay measures the ability of compounds to outcompete the iron binding activity of the weak iron chelating fluorescent probe Calcein, resulting in a quantifiable increase in fluorescence when chelation occurs.
08:45
Quantitating Iron Transport Across the Mouse Placenta In Vivo Using Nonradioactive Iron Isotopes
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Cited by 3 •
2022
This article demonstrates how to prepare and administer transferrin-bound nonradioactive isotopic iron for studies of iron transport in mouse pregnancy. The approach for quantifying isotopic iron in fetoplacental compartments is also described.
06:37
Staphylococcus aureus Growth using Human Hemoglobin as an Iron Source
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Cited by 31 •
2013
Here we describe a growth assay for Staphylococcus aureus using hemoglobin as the sole source of available nutrient iron. This assay establishes the role of bacterial factors involved in hemoglobin-derived iron acquisition.
01:19
Complexation Equilibria: The Chelate Effect
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2024
In complexation reactions, metal atoms or cations interact with ligands to form donor-acceptor adducts called metal complexes. Ligands that bind through one donor site are monodentate, ligands with two donor sites are bidentate, and those with more than two donor sites are polydentate ligands. For example, ethylene diamine is a bidentate ligand that binds through two nitrogen donor atoms, forming a five-membered ring. EDTA is a polydentate ligand that binds through four oxygen and two nitrogen...
03:06
Culturing Mycobacterium tuberculosis Under Iron-Limited Conditions
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2025
Source: Gupta, S., et al. Isolation and Characterization of Extracellular Vesicles Produced by Iron-limited Mycobacteria. J. Vis. Exp. (2019)This video demonstrates the procedure for culturing Mycobacterium tuberculosis under iron-limited conditions to induce iron stress and promote the secretion of siderophores that support bacterial survival.
FAQs
Donor atoms are the ligand atoms that coordinate directly with iron. When several donor atoms bind the same iron center, they can form a stable complex and reduce the amount of iron available for other interactions. This coordination chemistry allows researchers to influence iron transport, storage, and reactivity without treating all cellular iron as an identical pool.
Chelation changes iron availability, not simply the total amount of iron present. Removing free or loosely bound iron can limit its participation in reactions, alter movement into storage or transport pathways, and change the activity of iron-dependent systems. Consequently, cellular responses may reflect redistribution of usable iron as well as overall iron depletion.
Free or loosely bound iron is more accessible to chemical and biological interactions than iron held within stable cellular complexes. Chelators can preferentially sequester this accessible fraction, making it useful for examining iron-dependent reactivity and stress responses. This distinction helps experiments separate effects of changing reactive iron availability from effects on tightly retained iron.
Researchers can apply chelation to change the availability of iron during studies of oxidative stress or enzyme activity. Observing cellular or biochemical responses under altered iron conditions helps reveal whether iron contributes to a reaction, supports an enzyme, or influences stress signaling. The approach therefore links iron handling with functional outcomes rather than measuring iron alone.
A study should consider how altered iron availability affects transport, storage, reactivity, and the cell's response to nutrient conditions. These outcomes provide complementary information about iron metabolism: transport reflects movement, storage reflects sequestration, and reactivity reflects chemically accessible iron. Examining these relationships can clarify how cells maintain or respond to changing iron supply.
Chelation can create conditions in which accessible iron becomes limited, allowing investigators to examine how microorganisms or mammalian cells respond. Researchers can then study iron acquisition strategies and cellular adaptations under changing nutrient availability. This is relevant to host-pathogen research because it helps connect iron competition and acquisition with biological interactions and disease mechanisms.
Medical research uses chelation to investigate and manage situations involving excess iron. By binding accessible iron, chelators can help reduce its availability and provide a framework for studying iron overload. The same principles support research into disease mechanisms and potential therapeutic strategies in which abnormal iron handling contributes to biological dysfunction.