Scientists have discovered a compound that could be particularly effective against ovarian cancer

Scientists from the University of Sheffield have discovered a compound that could be more effective in treating certain cancers than standard chemotherapy.

Could it be better than chemo?

Chemotherapy is still the first line of defence for most cancer tumours and is often highly effective. However, many cancers are naturally resistant or develop resistance to commonly used first-line chemotherapy drugs like cisplatin.

“Many cancer cells – about 20 percent – become resistant to common treatments by learning to ignore the internal signals that tell them to undergo programmed cell death, known as apoptosis,” explains Professor Jim Thomas, from the University’s Department of Chemistry.

“We have identified a compound that kills cancer cells that avoids the need for apoptosis, and so the usual resistance mechanism doesn’t work against our compound.

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He says that the compound is as potent as common current chemotherapeutics, but crucially retains its potency against treatment-resistant cancers. “By looking at the cellular response from the cancers we found the new drug lead works by two different mechanisms simultaneously, making it much more difficult for cancers to develop resistance toward them during treatment.”

The researchers believe that this compound could be particularly effective against ovarian cancer.

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Compounds tested against treatment-resistant cancers

Scientists from the University of Sheffield’s Departments of Biomedical Science and Chemistry collaborated to identify new drug candidates that would work against types of treatment-resistant cancers.

They screened new compounds made in the lab against a “panel” of cancers that were sensitive and resistant to standard cancer therapy.

The researchers also tested the compounds with non-malignant cells to see how toxic they were to normal cells. They found two lead compounds that had low toxicity to non-malignant cells but were highly active against cancer cells sensitive or resistant to standard treatment.

The team used a technique called “proteomics” to determine how thousands of proteins in the cells responded to exposure to the drug lead.

“Proteomics is a remarkably powerful approach we have in Sheffield to identify how living things respond to new drug candidates. The multiple mechanisms of action of the new molecules was an unexpected and exciting result,” explains Professor Carl Smythe, from the University’s Department of Biomedical Science.

Researchers now want to carry out further studies to find out if the compound can be used in combination with current treatments to improve their performance.

Source: Press release – The University of Sheffield

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