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Effective pain treatment for cancer patients?
Date:6/25/2009

Cancer patients often suffer from severe pain that cannot be effectively treated with conventional medication. Researchers at the Pharmacology Institute of the University of Heidelberg have found the possible reasons for this tumors release two signal substances that make nerve cells especially sensitive and enhance tumor growth. In animal tests, when the researchers blocked the effect of the signal substances on the nerve cells, the sensitivity of the nerve cells and tumor growth were reduced.

The results of the research of the international working group headed by Professor Dr. Rohini Kuner indicate a new approach for the development of effective pain medication for cancer patients. The work has now been published online in the prestigious journal Nature Medicine.

Tumor pain: new therapies are urgently needed

For patients, severe pain is one of the worst and most feared symptoms of cancer. The causes of the frequently extreme pain are still largely unknown. Cancer pain is frequently difficult to handle with conventional pain medication such as opioids. High dosages are required to achieve any effect at all as a result, the side effects are immense for the patients and tolerance may quickly ensue. "There is a great need for special pain medication for cancer patients," says pharmacologist Professor Dr. Rohini Kuner, who is especially interested in explaining the mechanisms of chronic pain.

Tumor signals make nerve cells extremely sensitive to pressure

In this research project, she and her colleagues examined tissue from mice to determine what signal substances were released by tumors. They discovered two molecules that were previously known only as growth factors for blood-forming stem cells. Contact with these molecules made nerve cells in the vicinity of the cancer tissue considerably more sensitive to pressure, as the researchers demonstrated by testing nerve activity with electrod
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Contact: Dr. Rohini Kuner
rohini.kuner@pharma.uni-heidelberg.de
49-622-154-8289
University Hospital Heidelberg
Source:Eurekalert  

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