NDLI: Oxidative Stress and Dermal Toxicity of Iron Oxide Nanoparticles In Vitro

Content Provider	Springer Nature Link
Author	Murray, Ashley R. Kisin, Elena Inman, Alfred Young, Shih Houng Muhammed, Mamoun Burks, Terrance Uheida, Abdusalam Tkach, Alexey Waltz, Micah Castrava, Vincent Fadeel, Bengt Kagan, Valerian E. Riviere, Jim E. Monteiro Riviere, Nancy Shvedova, Anna A.
Copyright Year	2012
Abstract	A number of commercially available metal/metal oxide nanoparticles (NPs) such as superparamagnetic iron oxide (SPION) are utilized by the medical field for a wide variety of applications. These NPs may able to induce dermal toxicity via their physical nature and reactive surface properties. We hypothesize that SPION may be toxic to skin via the ability of particles to be internalized and thereby initiate oxidative stress, inducing redox-sensitive transcription factors affecting/leading to inflammation. Due to the skin’s susceptibility to UV radiation, it is also of importance to address the combined effect of UVB and NPs co-exposure. To test this hypothesis, the effects of dextran-coated SPION of different sizes (15–50 nm) and manufacturers (MicroMod, Rostock-Warnemunde, Germany and KTH-Royal Institute of Technology, Stockholm, Sweden) were evaluated in two cell lines: normal human epidermal keratinocytes (HEK) and murine epidermal cells (JB6 P$^{+}$). HEK cells exposed to 20 nm (KTH and MicroMod) had a decrease in viability, while the 15 and 50 nm particles were not cytotoxic. HEK cells were also capable of internalizing the KTH particles (15 and 20 nm) but not the MicroMod SPION (20 and 50 nm). IL-8 and IL-6 were also elevated in HEK cells following exposure to SPION. Exposure of JB6 P$^{+}$ cells to all SPIONs evaluated resulted in activation of AP-1. Exposure to SPION alone was not sufficient to induce NF-κB activation; however, co-exposure with UVB resulted in significant NF-κB induction in cells exposed to 15 and 20 nm KTH SPION and 50 nm MicroMod particles. Pre-exposure of JB6 P$^{+}$ cells to UVB followed by NPs induced a significant depletion of glutathione, release of cytokines, and cell damage as assessed by release of lactate dehydrogenase. Altogether, these data indicate that co-exposure to UVB and SPIONs was associated with induction of oxidative stress and release of inflammatory mediators. These results verify the need to thoroughly evaluate the adverse effects of UVB when evaluating dermal toxicity of engineered NPs on skin.
Starting Page	461
Ending Page	476
Page Count	16
File Format	PDF
ISSN	10859195
Journal	Cell Biochemistry and Biophysics
Volume Number	67
Issue Number	2
e-ISSN	15590283
Language	English
Publisher	Springer US
Publisher Date	2012-06-05
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Nanoparticles Skin exposure Ultraviolet radiation Iron oxide Biochemistry Pharmacology/Toxicology Biotechnology Cell Biology Biophysics and Biological Physics
Content Type	Text
Resource Type	Article
Subject	Cell Biology Medicine Biochemistry Biophysics

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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