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  • Frequent peanut...

Frequent peanut consumption by cancer patients increases risk of cancer metastasis: Study

Written By : Hina Zahid |Medically Reviewed By : Dr. Kamal Kant Kohli Published On 2021-08-07T09:00:46+05:30  |  Updated On 7 Aug 2021 9:46 AM IST
Frequent peanut consumption by cancer patients increases risk of cancer metastasis: Study
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UK: A recent study, published in the journal Carcinogenesis, has identified new factors to pile on previous findings that showed frequent peanut consumption by cancer patients to be associated with increased risk of cancer spread.

Researchers from the University of Liverpool showed that peanut agglutinin (PNA) – a carbohydrate-binding protein rapidly enters into the blood circulation after peanuts consumption. It then interacts with blood vascular wall (endothelial) cells producing molecules called cytokines (IL-6 and MCP-1) -- promoters of cancer metastasis. The increased cytokine production causes other endothelial cells to express more cell surface adhesion molecules, making them more attractive to the circulating tumor cells and thus potentially promoting metastasis.

In an earlier study, Corresponding Author Professor Lu-Gang Yu and colleagues reported that circulating PNA binds to a special sugar chain, which occurs mainly on pre-cancerous and cancer cells, and interacts with a larger protein expressed on the surface of tumor cells in the bloodstream.

This interaction triggers changes in the larger protein, resulting in underlying adhesion molecules on the surface of the cancer cell to become exposed, making the cancer cells stickier and easier to attach themselves to the blood vessels. It also allows the cancer cells to form small clumps that prolong the survival of cancer cells in the body's circulation. Many epithelial cancers spread to the other organs through traveling through the bloodstream.

Professor Lugang Yu said: "Although further research and investigation are still needed, these studies suggest that very frequent consumption of peanuts by cancer patients might increase the risk of metastatic spread.

"Reassuringly though, a large US study reported no significant impact of peanut consumption on cancer mortality. In another study, peanut consumption was reported to have no significant effect on prognosis in men with established prostate cancer. In our previous healthy volunteer study, substantial blood concentrations of PNA were only seen transiently one hour or so after consumption of a large dose (250g) of peanuts, so it may be that 'normal' peanut consumption yielding lower PNA concentrations is harmless.

"Nevertheless, the possibility remains that circulating PNA, at least at the relatively high levels found shortly after a large "dose" of peanuts, could have a significant biological effect on tumour cells circulating at that time, with a potential for increased risk of metastasis. Heavy or very frequent peanut consumption therefore might be better avoided by cancer patients."

The possible impact of heavy peanut consumption by cancer patients on survival will need to be investigated in further population-based epidemiological studies.

Reference:

The study titled, "Appearance of peanut agglutinin in the blood circulation after peanut ingestion promotes endothelial secretion of metastasis-promoting cytokines," is published in the journal Carcinogenesis.

DOI: https://academic.oup.com/carcin/advance-article-abstract/doi/10.1093/carcin/bgab059/6315265

peanutscancerpeanut agglutininjournal Carcinogenesiscancer metastasis
Source : Carcinogenesis
Hina Zahid
Hina Zahid

    Hina Zahid Joined Medical Dialogue in 2017 with a passion to work as a Reporter. She coordinates with various national and international journals and association and covers all the stories related to Medical guidelines, Medical Journals, rare medical surgeries as well as all the updates in the medical field. Email: editorial@medicaldialogues.in. Contact no. 011-43720751

    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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