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Tumor cells can weaken immune response

05.09.2005


Tumor cells can grow without control by weakening specific cells of the immune system, the T-cells, which normally detect and destroy tumor cells. The findings of Dr. Gerald Willimsky and Prof. Thomas Blankenstein (Max Delbrück Center for Molecular Medicine, MDC, Berlin-Buch and Charité) were generated in transgenic mice over a period of seven years and have now been published in the scientific journal Nature* (doi:10.1038/nature03954). Until now, the notion was that tumor cells escape recognition and subsequent destruction by T-cells by hiding.



Furthermore, Dr. Willimsky and Prof. Blankenstein could show that the immune system recognizes tumors derived from single cells and strongly reacts, for example by the increase in T-cells. However, these T-cells do not function. The findings of the two immunologists refer to sporadic tumors which develop without influence from the outside. T-cells on the other hand can control cancers caused by viral infection (e.g., B cell lymphomas triggered by Epstein Barr viruses). Even though tumor cells weaken the immune system, the two researchers are convinced that there is still hope for an immune therapy because tumor cells do not lose their structures which are targets for immune cells, making them still vulnerable for detection and destruction.

Barbara Bachtler | alfa
Further information:
http://www.mdc-berlin.de/englisch/about_the_mdc/public_relations/e_index.htm

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