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Iron induces death in tumor cells

Rapid growth of cancer cells and their frequent divisions have their price: Cancer cells need considerably more energy than healthy cells. Their metabolism runs at full speed and requires large amounts of micronutrients, particularly iron. However, high levels of iron in the cell lead to the production of extremely harmful free radicals. To protect itself from these, the cell inactivates free iron by binding it to what are called iron storage proteins.

Collaborating with physicians of the Dermatology Department of Mannheim University Hospitals, Dr. Karsten Glow and Professor Dr. Peter Krammer, head of the Division of Immunogenetics at DKFZ, investigated Szary's disease (also called Szary syndrome), an extremely aggressive type of cutaneous T cell lymphoma. The majority of currently available treatments are not really effective against this fatal type of cancer.

Using a molecular-biological trick, Glow and colleagues succeeded in blocking the production of one of the iron storage proteins in lymphoma cells. This leads to a rise in the level of free, non-bound iron in these cells. The iron boosts the production of free oxygen radicals which cause oxidative stress and, thus, cause damage to the cancer cells and induce their death. Healthy cells with their low iron level, however, survive the treatment unharmed.

The DKFZ researchers have already found evidence that this iron effect also works in other lymphomas. They are now investigating whether selective release of iron may be a suitable approach for developing a novel cancer treatment.


Contact: Dr. Sibylle Kohlstdt
Helmholtz Association of German Research Centres

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