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New treatment shows chances of improved survival rates for rare and aggressive cancer Cancer
Photo Courtesy Pixabay

New treatment shows chances of improved survival rates for rare and aggressive cancer

India Blooms News Service | @indiablooms | 16 Feb 2024, 03:03 pm

The phase 3 clinical trial, published recently in JAMA Oncology and sponsored by Polaris Pharmaceuticals, has unveiled a breakthrough in the treatment of malignant pleural mesothelioma (MPM), a rare and often rapidly fatal form of cancer associated with asbestos exposure and which has limited therapeutic options.

The trial found that a combination treatment of traditional chemotherapy with a new drug, ADI-PEG20, increased the median survival of participants by 1.6 months, and quadrupled the survival at 36 months, compared to placebo-chemotherapy, read the Queen Mary’s Barts Cancer Institute website .

The findings are significant, as MPM has one of the lowest 5-year survival rates of any solid cancer of around 5-10%. This innovative approach marks the first successful combination of chemotherapy with a drug that targets cancer's metabolism developed for this disease in 20 years.

The ATOMIC-meso trial is the culmination of 20 years of research at Queen Mary’s Barts Cancer Institute that began with Professor Szlosarek’s discovery that malignant mesothelioma cells lack a protein called ASS1, which enables cells to manufacture their own arginine.

He and his team have since dedicated their efforts to using this knowledge to create an effective treatment for patients with MPM.

Professor Szlosarek said:  “It's truly wonderful to see the research into the arginine starvation of cancer cells come to fruition. This discovery is something I have been driving from its earliest stages in the lab, with a new treatment, ADI-PEG20, now improving patient lives affected by mesothelioma. I thank all the patients and families, investigators and their teams, and Polaris Pharmaceuticals for their commitment to defining a new cancer therapy.”

There are ongoing studies assessing ADI-PEG20 in patients who have sarcoma or glioblastoma multiforme (a type of brain tumour) and other cancers dependent on arginine. The success of this novel chemotherapy in MPM also suggests that the drug may be of benefit in the treatment of multiple other types of cancer. 

Mick’s journey with mesothelioma 

Mick worked in a factory boiler room in the 1970s, where he was exposed to asbestos.

In 2018, he visited his doctor after he began to feel unwell and had lost three stone in weight. He became anaemic and was eventually diagnosed with mesothelioma.

“It was a bit of a shock: I was given four months to live,” Mick explains. His doctor referred him to Professor Szlosarek, who enrolled him in the ATOMIC-meso trial. “I always believed in Peter. I said: ‘I’m in it to win it – you’re not getting rid of me.’ And here I am five years later.”

For two years, Mick visited St Bartholomew’s Hospital every week, accompanied by his wife, Jackie, or one of his children or grandchildren. “I’d have two injections of the new treatment – one in each arm. I didn’t have any serious side effects,” Mick explains. “I met many of the other people on the trial. Over time, some of them disappeared. But I kept going.” 

Two and a half years after Mick enrolled on the ATOMIC-meso trial, his mesothelioma returned and he received a second course of treatment, this time immunotherapy.

He experienced more side effects with this therapy, including encephalitis.

But his cancer remains under control, and recently he was able to celebrate his 80th birthday.

Professor Szlosarek and his team plan to study why certain patients, such as Mick, benefit so greatly from ADI-PEG20, in the hope of discovering how to extend this benefit to more people. 

Mick says: “This trial has changed the lives of people with mesothelioma, allowing us to live longer. I have five grandchildren and two great-grandchildren now – I wouldn’t want to miss all that.”

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