Most deadly cancer cells use large amounts of lipids as energy sources for their metastasis or spread. Cancer cells filled with lipids are more invasive and more likely to form metastases. Prof. Feron has discovered that cancer cells store lipids in small intracellular vesicles called 'lipid droplets'. He and his team sought to detect the relation between lipid storage and metastatisation. They identified a factor called TGF-beta2 as the switch responsible for both lipid storage and the aggressive nature of cancer cells. Moreover, it appeared that the two processes were mutually reinforcing. In fact, by accumulating lipids, more precisely fatty acids, cancer cells build up energy reserves, which they can then use as needed throughout their metastatic course.
‘TGF-beta2 is responsible for lipid storage and the aggressive nature of cancer cells. Targeting TGF-beta2 expression may help prevent their spread.’
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Already known was that the acidity found in tumours promotes cancer cells' invasion of healthy tissue. The process requires the detachment of the cancer cell from its original anchor site and the ability to survive under such conditions (which are fatal to healthy cells).Read More..
The new finding: UCLouvain researchers demonstrated that this acidity promotes, via the same TGF-beta2 'switch', the invasive potential and formation of lipid droplets. These provide the invasive cells with the energy they need to move around and withstand the harsh conditions encountered during the metastatisation process.
It's like a mountaineer who takes the food and equipment necessary to reach the summit in spite of complex weather conditions.
Concretely, this UCLouvain research opens up new therapeutic avenues thanks to the discovery of the different actors involved in metastasis. These actors can thus be targeted and combated. Prof. Feron and his team show that it is possible to reduce tumour invasiveness and prevent metastases using specific inhibitors of TGF-beta2 expression but also compounds capable of blocking the transport of fatty acids or the formation of triglycerides.
Among the latter are new drugs that are being evaluated to treat obesity. Their indications could therefore be rapidly extended to counter the development of metastases, which is the major cause of death among cancer patients.
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Source-Eurekalert