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  • Omega-3s may enhance ...

Omega-3s may enhance cancer- fighting power of immunotherapy

Written By : Dr Kartikeya Kohli |Medically Reviewed By : Dr. Kamal Kant Kohli Published On 2022-04-03T22:30:47+05:30  |  Updated On 3 April 2022 10:24 PM IST
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Philadelphia: Findings from a new study performed in mice suggest that omega-3 fatty acids could help immunotherapy and other treatments do a better job at fighting cancer. Immunotherapies, which stimulate the body's own immune system to attack cancer, have revolutionized cancer treatment, but they don't work for every patient.

"Dietary interventions can be powerful tools because they are relatively simple and inexpensive to implement," said Abigail Kelly, a research assistant at Harvard Medical School's Beth Israel Deaconess Medical Center in Boston. "Our findings show that omega-3 supplementation has the potential to broadly improve immunotherapy and other anti-cancer drugs in the clinical setting."

Kelly will present the new research at the American Society for Investigative Pathology annual meeting during the Experimental Biology (EB) 2022 meeting, to be held April 2–5 in Philadelphia.

Research from various laboratories has suggested that omega-3 fatty acids can help reduce cancer risk whereas consuming too much omega-6 fatty acids can stimulate cancer. Sources of omega-3s include fish, nuts and seeds while omegas-6s are found in meats, eggs and other foods.

In the new studies, Kelly and senior author Dipak Panigraphy wanted to find out how diets supplemented with these fatty acids affected the anti-tumor activity of immune checkpoint blockade immunotherapy and an anti-inflammatory therapy that inhibits the enzyme soluble epoxide hydrolase (sEH). The immunotherapy has regulatory approval and is being used clinically while the anti-inflammatory therapy is undergoing clinical development.

The researchers used state-of-the-art mouse models of primary and metastatic tumors for the new study. They began by feeding the mice either a standard diet or a diet high in omega-3 or 6 for 10 days prior to tumor injection and for the duration of the studies. One week after the tumors were injected, mice in each diet group were started on immunotherapy, anti-inflammatory therapy, both therapies together, or no treatment.

The researchers found that dietary omega-3 fatty acid supplementation blocked tumor growth in mice treated with immunotherapy, sEH inhibitor, or both treatments used together. In contrast, mice on the high-omega-6 diet and given immunotherapy experienced accelerated tumor growth in certain tumor types.

In mice receiving the high omega-3 diet and both cancer treatments, up to 67 percent of tumor growth was inhibited compared to mice receiving no treatment and a normal diet. This indicates possible synergistic anti-tumor activity, meaning that the combined effect may be greater than the sum of its parts.

"We demonstrated, for the first time, that the combination of immunotherapy and anti-inflammatory treatment (sEHi) was more effective when mice were fed diets enriched with omega-3 fatty acids," said Kelly. "This is very promising because dietary supplementation is easy to implement for cancer patients and can be added for patients already on immunotherapy."

The researchers are now performing additional studies to determine the mechanism of action of the potentially synergistic anti-tumor activity imparted by omega-3 supplementation. They are conducting these studies with human cancer tissues and cells, human immune cells and animal models to aid with translation to cancer patients. These new results from Kelly and colleagues may represent a new treatment approach that remains to be evaluated in humans.

immunotherapycancerimmune systemomega-3scancer patientscancer immunotherapynutritioncancer treatmentfatty acidsExperimental Biology
Source : American Society for Investigative Pathology annual meeting
Dr Kartikeya Kohli
Dr Kartikeya Kohli

    Dr Kartikeya Kohli is an Internal Medicine Consultant at Sitaram Bhartia Hospital in Delhi with super speciality training in Nephrology. He has worked with various eminent hospitals like Indraprastha Apollo Hospital, Sir Gangaram Hospital. He holds an MBBS from Kasturba Medical College Manipal, DNB Internal Medicine, Post Graduate Diploma in Clinical Research and Business Development, Fellow DNB Nephrology, MRCP and ECFMG Certification. He has been closely associated with India Medical Association South Delhi Branch and Delhi Medical Association and has been organising continuing medical education programs on their behalf from time to time. Further he has been contributing medical articles for their newsletters as well. He is also associated with electronic media and TV for conduction and presentation of health programs. He has been associated with Medical Dialogues for last 3 years and contributing articles on regular basis.

    Dr. Kamal Kant Kohli
    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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