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Scientists develop potential new approach to stop cancer metastasis

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Posted May 24, 2018

Researchers have identified a compound that blocks the spread of pancreatic and other cancers in various animal models. When cancer spreads from one part of the body to another in a process called metastasis, it can eventually grow beyond the reach of effective therapies. Now, there is a new plan of attack against this deadly process, thanks to scientists at the National Institutes of Health, Northwestern University and their collaborative research partners.

A compound breaks down a component of cancer cells.

The team collaborated to identify a compound, which they named metarrestin, that stopped tumor metastasis in multiple animal models. Mice treated with metarrestin also had fewer tumors and lived longer than mice that did not receive treatment. These results were published inScience Translational Medicine(link is external).

“Many drugs are aimed at stopping cancer growth and killing cancer cells,” said co-author Juan Marugan, Ph.D., group leader of the NIH’s National Center for Advancing Translational Sciences (NCATS) Chemical Genomics Center. “However, there is no single approved drug specifically aimed at treating metastasis. Our results show metarrestin is a very promising agent that we should continue to investigate against metastasis.”

In patients, metarrestin potentially could be effective as a therapy after cancer surgery. Because advanced cancers are difficult to completely remove with surgery, doctors typically give chemotherapy to try to kill undetected cancer cells left behind and prevent the cancer from coming back. Metarrestin could be added to such standard drug therapy.

Metarrestin breaks down an incompletely understood component of cancer cells called the perinucleolar compartment (PNC). PNCs are found only in cancer cells, and in a higher number of cells in advanced cancer, when it has spread to other sites in the body.

The compound metarrestin halts the spread of cancer in animal models. In this image, the liver of an untreated mouse (top) shows metastatic tumors (arrows). After treatment with metarrestin, the tumors are greatly reduced (bottom). Image credit: Frankowski et al., Sci. Transl. Med.

Co-author Sui Huang, M.D., Ph.D., and her colleagues at Northwestern University Feinberg School of Medicine, Chicago, showed early on that the more cancer cells with PNCs in a tumor, the more likely it would spread. Her findings suggested that reducing PNCs might translate to less cancer progression and possibly better outcomes in patients.

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