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Cancer treatment 2.5 times more effective in tumors with defective "energy factories" - Video

Published On 2024-01-30T09:00:31+05:30  |  Updated On 30 Jan 2024 9:00 AM IST
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Overview

Cancer Research UK-funded scientists have made an unusual discovery that could help to identify patients who are up to two and a half times more likely to respond to currently available cancer drugs.

Scientists at the Cancer Research UK Scotland Institute and Memorial Sloan Kettering Cancer Centre in the USA have “rewired” the DNA of mitochondria – energy factories found in every living cell. They found that creating mutations in parts of this DNA determines how well cancer will respond to immunotherapy – treatments which harness the body’s natural defences to attack cancer cells.

This discovery opens up new ways to identify patients who could benefit most from immunotherapy by testing for mitochondrial DNA mutations. Half of all cancers have mitochondrial DNA (mtDNA) mutations and this discovery shows for the first time that they could be exploited to improve cancer treatment.

In the future, combining treatments that mimic the effect of these mutations with immunotherapy could increase the chances of successful treatment for multiple types of cancer.

In a paper published in the journal Nature Cancer, the scientists demonstrate for the first time a direct link between mitochondrial DNA (mtDNA) mutations and response to cancer treatment. Surprisingly, they found that tumours with high levels of mtDNA mutations are up to two and a half times more likely to respond to treatment with an immunotherapy drug called nivolumab.

Nivolumab works by releasing a “brake” on the immune system to attack cancer cells. It is currently used to treat several different cancers, including melanoma, lung cancer, liver cancer and bowel cancer. The scientists believe that they could routinely test for mitochondrial DNA mutations in the future – enabling doctors to figure out which patients will benefit most from immunotherapy before starting treatment.

They also believe that mimicking the effects of the mitochondrial DNA mutations could make treatment-resistant cancers sensitive to immunotherapy – enabling thousands more cancer patients to benefit from this pioneering treatment.

The technology behind the discovery is now the subject of patents filed by Cancer Research Horizons, Cancer Research UK’s innovation arm. It will help bring the technology to market to allow new treatments to be developed which disrupt the energy sources cancer uses to spread and grow. To date, Cancer Research Horizons has brought 11 new cancer drugs to market, which have been used in over six million courses of cancer treatment worldwide.

Reference: Cancer treatment two and a half times more effective when tumours have defective "energy factories"; Nature Cancer; DOI: 10.1038/s43018-023-00721-w

Speakers

Anshika Mishra

Anshika Mishra is a dedicated scholar pursuing a Masters in Biotechnology, driven by a profound passion for exploring the intersection of science and healthcare. Having embarked on this academic journey with a passion to make meaningful contributions to the medical field, Anshika joined Medical Dialogues in 2023 to further delve into the realms of healthcare journalism.

Dr. Kamal Kant Kohli

Dr Kamal Kant Kohli-MBBS, DTCD- a chest specialist with more than 30 years of practice and a flair for writing clinical articles, Dr Kamal Kant Kohli joined Medical Dialogues as a Chief Editor of Medical News. Besides writing articles, as an editor, he proofreads and verifies all the medical content published on Medical Dialogues including those coming from journals, studies,medical conferences,guidelines etc. Email: drkohli@medicaldialogues.in. Contact no. 011-43720751
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