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Using Magnetometry to Monitor Cellular Incorporation and Subsequent Biodegradation of Chemically Synthetized Iron Oxide Nanoparticles
Published on: February 27, 2021
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Oxidation-Induced Degradable Nanogels for Iron Chelation
Zhi Liu1, Yan Wang1, Max Purro1
1Pharmaceutical Sciences Division, School of Pharmacy, University of Wisconsin-Madison 777 Highland Avenue, Madison, WI 53705-2222, USA.
Scientific Reports
|February 13, 2016
Summary
New nanogels designed for iron overload effectively chelate iron and degrade in response to oxidative stress. This targeted approach reduces cellular damage and helps regulate essential iron levels in overloaded cells.
Area of Science:
- Biomaterials Science
- Nanotechnology
- Toxicology
Background:
- Iron overload elevates cellular oxidative stress via reactive oxygen species (ROS), leading to organ damage and potentially fatal outcomes.
- Elevated oxidative stress is a hallmark of iron overload conditions, necessitating targeted therapeutic strategies.
Purpose of the Study:
- To design and synthesize oxidation-induced degradable nanogels for effective iron chelation in iron overload conditions.
- To create a nanogel system that degrades proportionally to oxidative stress levels and reduces chelator cytotoxicity.
Main Methods:
- Nanogels were synthesized using reverse emulsion polymerization, incorporating oxidation-sensitive host-guest crosslinkers (β-cyclodextrin and ferrocene) and deferoxamine (DFO) for iron chelation.
- UV-Vis absorption and atomic absorption spectroscopy (AAS) were employed to confirm the iron-chelating capacity of the nanogels.
- Cytotoxicity was assessed in macrophage cells, and cellular ferritin expression and intracellular iron levels were measured in iron-overloaded cells.
Main Results:
- The synthesized nanogels demonstrated effective iron chelation capabilities.
- Nanogel degradation rates correlated with the level of oxidative stress present.
- Conjugation of DFO to the nanogel reduced its inherent cytotoxicity in macrophage cells.
- The nanogels successfully reduced cellular ferritin expression and regulated intracellular iron levels in iron-overloaded cells.
Conclusions:
- Oxidation-induced degradable nanogels offer a promising strategy for managing iron overload by providing targeted iron chelation.
- These nanogels can mitigate oxidative stress-induced damage and help restore iron homeostasis in cells.
- The developed system demonstrates potential for improved therapeutic outcomes in patients with iron overload disorders.
