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Breakthrough In Understanding Tumor Immune Therapy: Induction Of Tumor Dormancy Instead Of Killing

Date:
June 15, 2008
Source:
Tuebingen University
Summary:
Researchers have uncovered an entirely new understanding on how the immune system may control tumor development. Until now it is strongly believed that the immune system controls growth of tumors by killing tumor cells. The researchers now show that immune responses can prevent tumor growth without killing tumor cells.

Researchers from the Tubingen University, Department of Dermatology, uncovered an entirely new understanding on how the immune system may control tumor development. Until now it is strongly believed that the immune system controls growth of tumors by killing tumor cells.

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The Tubingen researchers, members of the Comprehensive Cancer Center, now show that immune responses can prevent tumor growth without killing tumor cells.

They used a model of endogenously growing tumors that develop, like many human tumors, because of a defect in normal cell death. The researchers show that the immune system can prevent tumor growth without destroying tumor cells. They show that early treatment of developing tumors arrests tumor development at very early stages through a strictly cytokine mediated mechanism. One of the important players that prevents the outgrowth of malignant tumors is interferon.

The researchers show further a second important aspect: Immune responses can both - either induce tumor dormancy or, unexpectedly, tumor growth. In the absence of either interferon or tumor necrosis factor the immune response converts the from a protective into a tumor promoting immune response.

In conclusion, the paper (published in Cancer Cell, 10.6.2008) gives a great hope and new aspects for the development of new tumor vaccines. They show that tumor immune responses can induce tumor dormancy, which means that the immune response arrests tumors at early stages.

Yet, these immune responses have to occur early in tumor development and have to provide the correct pattern of cytokines. In the case of an inappropriate cyto-kine pattern, i.e. missing interferon or missing tumor necrosis factor, the same response may dramatically enhance tumor growth.


Story Source:

The above story is based on materials provided by Tuebingen University. Note: Materials may be edited for content and length.


Cite This Page:

Tuebingen University. "Breakthrough In Understanding Tumor Immune Therapy: Induction Of Tumor Dormancy Instead Of Killing." ScienceDaily. ScienceDaily, 15 June 2008. <www.sciencedaily.com/releases/2008/06/080611183015.htm>.
Tuebingen University. (2008, June 15). Breakthrough In Understanding Tumor Immune Therapy: Induction Of Tumor Dormancy Instead Of Killing. ScienceDaily. Retrieved November 1, 2014 from www.sciencedaily.com/releases/2008/06/080611183015.htm
Tuebingen University. "Breakthrough In Understanding Tumor Immune Therapy: Induction Of Tumor Dormancy Instead Of Killing." ScienceDaily. www.sciencedaily.com/releases/2008/06/080611183015.htm (accessed November 1, 2014).

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