17/02/2026
The next generation of cancer therapy: how Deflexifol could replace a generations-old cancer drug to offer fresh hope to cancer patients
Australian biotech company FivepHusion has developed a breakthrough drug that brings two cancer-killing drugs together for improved tolerability, higher dosing potential and enhanced anti-cancer activity. With AusHealth’s support, a phase II trial could make Deflexifol the first drug therapy for paediatric ependymoma and redefine standard care for millions of other cancer patients. More amazing, it could be approved within just four years...
For more than 60 years, one of the most widely used cancer drugs in the world has remained fundamentally unchanged.
5-fluorouracil – known simply as 5-FU – was first launched in 1962, well before colour TV came to Australia. Today, it is still the standard treatment for a wide range of solid tumours, including colorectal, gastric, pancreatic, head and neck and some breast cancers.
In the 1990s, a second drug, leucovorin (LV), was added to clinical practice after oncologists discovered it dramatically boosted 5-FU’s cancer-killing power. Together, the drugs were synergistic and the science was clear: in the fight against cancer, one plus one could equal three.
There was a problem, however. When administered at the same time, 5-FU and leucovorin formed crystals that blocked the central venous catheters used to deliver chemotherapy. These catheters are surgically implanted and essential for patients receiving frequent treatment.
To this day, to overcome the risk of blockage of a patient’s catheter, oncologists are forced to give the drugs sequentially. This however is a poor compromise: when the drugs are no longer optimally co-exposed in the body, the synergy is largely lost.
“Instead of ‘one plus one equals three’, treatment has become closer to ‘one plus one equals only one’, with little benefit provided by the leucovorin,” says Dr Christian Toouli.
Dr Toouli is the CEO and Managing Director of FivepHusion, which was founded by oncologists to solve this decades-old conundrum in the treatment of cancer.
Working with researchers at the University of Wollongong, the team discovered a way these two drugs could finally be delivered together, safely, the way they were always intended to be.
Read the full article here: https://www.linkedin.com/pulse/next-generation-cancer-therapy-how-deflexifol-could-iwdoc/