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Starving cancer cells of sugar -- does it work?

February 8, 2018

It was long believed that sugar served as one of the main energy sources for cancer cells. However, the team discovered that in some cancer cells, tiny levels of sugar that were incapable of providing sufficient energy ensured the survival of the cancer cells. This meant that there is a previously undiscovered role of sugar for survival, besides providing energy. The team subsequently found that sugar has a novel signalling function in cancer cells whereby its deprivation would trigger voltage differences across cancer cell membrane, leading to a flowing of calcium ions into the cells and subsequently cell death. 

The team speculated that this unique property of sugar in cancer cells could be manipulated for a novel therapeutic approach. By combining the inhibition of sugar intake and the increase of calcium levels in cancer cells, they managed to kill cancer cells while leaving healthy cells intact. Itahana and colleagues also found that certain cancer cells lost the ability to sustain intracellular sugar levels after sugar deprivation and speculated this to be the primary reason why not all cancer cells are sensitive to sugar deprivation. By applying the combination treatment to the suitable cancer cell types, this could be a novel treatment combination against cancer. The team aims to extend their results to develop a new cancer treatment in the future.

The new combination therapy based on this finding are on international patent application no. PCT/SG2017/050208 for "A potential combination therapy using an inhibitor of glucose transport and an intracellular calcium inducer to target cancer metabolism." 

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