liu.seSearch for publications in DiVA
Change search
ReferencesLink to record
Permanent link

Direct link
Lysosomal iron, iron chelation, and cell death
Department of Clinical Pathology and Cytology, Karolinska University Hospital in Huddinge, Stockholm, Sweden .
Linköping University, Department of Medical and Health Sciences, Pharmacology. Linköping University, Faculty of Health Sciences.
2013 (English)In: Antioxidants and Redox Signaling, ISSN 1523-0864, E-ISSN 1557-7716, Vol. 18, no 8, 888-898 p.Article, review/survey (Refereed) Published
Abstract [en]

Significance: Lysosomes are acidic organelles containing more than fifty hydrolases that provide for the degradation of intracellular and endocytosed materials by autophagy and heterophagy, respectively. They digest a variety of macromolecules, as well as all organelles, and their integrity is crucial. As a result of the degradation of iron-containing macromolecules (e.g., ferritin and mitochondrial components) or endocytosed erythrocytes (by macrophages), lysosomes can accumulate large amounts of iron. This iron occurs often as Fe(II) due to the acidic and reducing lysosomal environment. Fe(II) is known to catalyze Fenton reactions, yielding extremely reactive hydroxyl radicals that may jeopardize lysosomal membrane integrity during oxidative stress. This results in the release of hydrolases and redox-active iron into the cytosol with ensuing damage or cell death. Lysosomes play key roles not only in apoptosis and necrosis but also in neurodegeneration, aging, and atherosclerosis. Recent Advances: The damaging effect of intralysosomal iron can be hampered by endogenous or exogenous iron chelators that enter the lysosomal compartment by membrane permeation, endocytosis, or autophagy. Critical Issues: Cellular sensitivity to oxidative stress is enhanced by lysosomal redox-active iron or by lysosomal-targeted copper chelators binding copper (from degradation of copper-containing macromolecules) in redox-active complexes. Probably due to higher copper levels, lysosomes of malignant cells may be specifically sensitized by such chelators. Future Directions: By increasing lysosomal redox-active iron or exposing cells to lysosomal-targeted copper chelators, it should be possible to enhance the sensitivity of cancer cells to radiation-induced oxidative stress or treatment with cytostatics that induce such stress.

Place, publisher, year, edition, pages
Mary Ann Liebert, 2013. Vol. 18, no 8, 888-898 p.
National Category
Medical and Health Sciences
URN: urn:nbn:se:liu:diva-89142DOI: 10.1089/ars.2012.4885ISI: 000314180300003PubMedID: 22909065OAI: diva2:607252
Available from: 2013-02-22 Created: 2013-02-22 Last updated: 2013-03-21

Open Access in DiVA

No full text

Other links

Publisher's full textPubMed

Search in DiVA

By author/editor
Kurz, Tino
By organisation
PharmacologyFaculty of Health Sciences
In the same journal
Antioxidants and Redox Signaling
Medical and Health Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 36 hits
ReferencesLink to record
Permanent link

Direct link