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A new indicator for breast cancer relapse identified
Date:6/19/2012

This press release is available in Spanish.

Researchers at the IMIM (Institut de Recerca Hospital del Mar) have proven that the absence of the 14-3-3 protein sigma in breast cancer cells is directly associated with these cells' capacity to activate the signalling of a protein complex called NF-kB, which is related to tumour progression. The activation of NF-kB in tumours was also identified as the best indicator for relapse in breast cancer patients, compared to other parameters currently used, such as the presence of affected ganglions or the tumour's size and degree. The investigators have also described a group of genes that are activated in breast cancer cells and that are also associated with a poor prognosis in other types of tumours.

Previous studies had detected that the 14-3-3 protein sigma was not present in the tumours of many breast cancer patients. They have now discovered that 'the lack of this protein does not in itself establish a prognosis factor for these types of cancer, although the NF-kB complex is an essential requirement for it to remain active chronically, as it is associated with tumour invasion and metastasis or, stated differently, the progression of the tumour', comments Llus Espinosa, study coordinator and researcher in the IMIM stem cells and cancer research group.

Breast cancer is most common among women in Western countries and relapse and metastasis are the fatal consequences of this disease. Identifying the mechanisms involved in the survival of breast cancer cells and their ability to colonise other tissues are crucial issues for improving treatment. With the participation of some 100 patients, this study analysed the possible usefulness of determining the lack of the 14-3-3 sigma and/or the activation of NF-kB in tumour cells as a factor in prognosis and diagnosis, as well as for future clinical and therapeutic a
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Contact: Marta Calsina
mcalsina@imim.es
34-933-160-680
IMIM (Hospital del Mar Research Institute)
Source:Eurekalert

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