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Scientists aim at slowing down the rapidly growing cancer cells

Updated: Oct 05, 2016 11:25 IST      
Scientists aim at slowing down the rapidly growing cancer cells

Washington D.C. [USA], Oct. 5 (ANI): A new study gives greater insight into the growth of cancer cells, bringing researchers one step closer to the fight against the fatal disease.

The study identifies a previously unknown "off-switch" for cancer, based on the protein TMX1, that can serve as a new strategy for personalized medicine.

Cancer tissue is known to alter its metabolic behaviour by repressing respiration.

This metabolic switch accelerates growth of tumour cells and promotes resistance to cell death mechanisms, making cancer difficult to treat.

The study found that the reduction of the protein TMX1 can single-handedly exacerbate these characteristics of cancer cells.

While healthy cells activate TMX1 upon oxidative stress, tumour cells with low amounts of TMX1 are unable to boost their respiration and are resistant to cell death mechanisms.

Such cells grow much faster and in turn lead to more aggressive types of cancer.

Senior author of the research Thomas Simmen said, "Tumour tissue that is poor in TMX1 is expected to lead to more aggressive types of tumours."

Adding, "Therefore, TMX1 is a biomarker for cancer progression: when it is high, more treatment options are available and the tumour is less aggressive. This allows chemotherapeutic drugs to activate the TMX1 switch and reduce tumour growth via oxidative stress. We will now investigate whether antioxidants could actually inactivate the TMX1

switch in cancer where this protein is still present, and would hence cause problems."

The team is continuing its work and is now investigating at which stage TMX1 gets increased or decreased in tumour tissue and why that occurs.

It's hoped the insight will in time help researchers use the TMX1 mechanism for new therapeutic approaches, blocking the protein's elimination in cases where it's low and making use of it to trigger tumour tissue death in cases where it is found to be high.

In patients where TMX1 is no longer present, strategies will need to be found to revive it.

The team also believes it can use its findings to give insight into the usefulness of adjuvant to chemotherapy, determining which ones can be used to make chemotherapy more efficient.

The study was published in the Journal of Cell Biology. (ANI)

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