QUT.edu.au – Gamma-tocotrienol, a special form of vitamin E, may improve survival rates of the world’s most common cancer – prostate cancer – and significantly reduce tumor regrowth.

Queensland University of Technology (QUT) prostate cancer researchers are leading the fight against a disease which kills 3000 Australian men a year.

Dr Patrick Ling, whose research will be a centerpiece of the new $354 million Translational Research Institute (TRI) when it opens in Brisbane, is leading a team of researchers who have identified a particular constituent of vitamin E, known as tocotrienol (T3), which can inhibit the growth of prostate tumors.

Construction of TRI officially began October 19, 2010 at the Princess Alexandra Hospital. The world-class facility brings together some of Queensland’s best medical researchers from four leading Australian research facilities to turn their work into accessible and potentially life-saving health treatments.

Dr Ling’s research has been funded by Davos Life Science in Singapore, who recently awarded him a further $128,000 to undertake a one-year study of the long-term effectiveness of T3 to prevent the recurrence of treated prostate cancer tumors.

“Prostate cancer is the most common type of cancer in developed countries,” Dr Ling said.

“It is responsible for more male deaths than any other cancer, except lung cancer.”

Dr Ling said existing chemotherapy and hormonal therapy treatment of prostate cancer was insufficient because it failed to kill off the prostate cancer stem cells (CSCs) which were believed to be responsible for the regrowth of tumors.

However, the research team have discovered a particular form of T3, called gamma-tocotrienol (γ-T3), can successfully kill off the prostate cancer CSCs.

“Currently there is no effective treatment for metastatic prostate cancer, because it grows back after conventional therapies in more than 70 per cent of cases,” he said.

“But with γ-T3, QUT researchers have found a better way to treat prostate cancer, which has the potential to inhibit recurrence of the disease.”

Dr Ling said in animal trials, γ-T3 completely inhibited tumor formation in more than 70 per cent of the mice implanted with prostate cancer cells and fed the vitamin E constituent in water. In the remaining cases, tumor regrowth was considerably reduced, while tumors reformed in 100 per cent of the control group.

The findings on this natural treatment for prostate cancer were published recently in the International Journal of Cancer.

The next stage of Dr Ling’s study has begun and will determine the long-term effectiveness of the γ-T3 treatment, with plans to progress to clinical trials in the future.

“Previous clinical trials using another vitamin E constituent to inhibit prostate cancer development were unsuccessful, but these trials did not use the vitamin E constituent γ-T3,” he said.

“Other research has found γ-T3 is also effective in suppressing other types of cancer, including breast, colon, liver and gastric.”

Dr Ling said while not all vitamin E preparations had the active constituent, natural vitamin E obtained from palm oil was rich in gamma-tocotrienol (γ-T3).

Dr Ling is based at IHBI and the Australian Prostate Cancer Research Centre – Queensland, a comprehensive research centre to investigate new ways to treat prostate cancer established by QUT and the Princess Alexandra Hospital with funding from the federal government.

His research is funded by world-leading gamma-tocotrienol manufacturer Davos Life Science. The Singapore-based company produces γ-T3 from sustainable palm plantations.