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Can cancer be turned against itself?
Date:2/4/2013

ells, the T-cells are activated and begin to produce cytokines, which enhances their capacity to kill cancer cells.

As these melanoma cells pass along the mutated Ras, the immune cells become increasingly active. Eventually, enough oncogenic material is transferred across the immune cells' threshold, causing the T-cells to act on the melanoma cells from which the oncogenic Ras was derived. Ultimately, this transfer tips the scales in favor of the immune cells, the researchers say.

Exploiting the information transfer

The next step is to develop a therapy that can enhance the transfer in patients with cancers linked to oncogenic Ras, says Prof. Kloog. And although their research has so far focused on melanoma, which is known to elicit the response of the immune system, he believes that this finding could be applicable to other types of cancers.

There is a constant balancing act between cancer cells and the immune system, says Dr. Goldstein. Under normal circumstances, the immune system will kill some cancerous cells on a daily basis. The disease becomes critical when the immune system can no longer keep cancer cells in check. Although there are many theories as to how cancer cells break free of this cycle, scientists are still attempting to discover why this occurs.

Prof. Kloog and Dr. Goldstein hope that this research leads to a better understanding of how the immune system fights tumors. "It's a part of the interaction between cancer and the immune system that is not well known," says Dr. Goldstein. "We are trying to gather more comprehensive data on all the proteins that are being passed around, and how this information impacts the immune system's response to cancer."


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Contact: George Hunka
ghunka@aftau.org
212-742-9070
American Friends of Tel Aviv University
Source:Eurekalert

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