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  • Western-style diet...

Western-style diet linked to incident colorectal cancer through intestinal microbiota

Written By : Dr. Kamal Kant Kohli Published On 2022-06-29T20:00:35+05:30  |  Updated On 29 Jun 2022 8:00 PM IST
Western-style diet linked to incident colorectal cancer through intestinal microbiota
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New research builds the case that a Western-style diet-rich in red and processed meat, sugar and refined grains/carbohydrates-is tied to higher risk of colorectal cancer through the intestinal microbiota. Investigators from Brigham and Women's Hospital with collaborators looked at data from more than 134,000 participants from two U.S.-wide prospective cohort studies.

The team analyzed dietary patterns as well as DNA from Escherichia coli strains found in more than 1,000 colorectal tumors. The team looked for bacterial strains carrying a distinct genetic island known as polyketide synthase (pks). Pks encodes an enzyme that has been shown to cause mutations in human cells. Overall, the team found that Western diet was associated with colorectal tumors containing high amounts of pks+ E. coli but not with tumors containing little to no amount of pks+ E. coli.

"These findings support our hypothesis that Western-style diets increase colorectal cancer risk through its effect on pks+ E. coli," said corresponding author Shuji Ogino, MD, PhD, MS, of the Program in Molecular Pathological Epidemiology in the Department of Pathology at the Brigham. "This is the first study to link Western diet with specific pathogenic bacteria in cancer. Our next question is which component of western-style diet and lifestyle relates to colorectal cancer containing this bacterial species."

Reference:

Western-style Diet, pks Island-Carrying Escherichia coli, and Colorectal Cancer: Analyses from Two Large Prospective Cohort Studies Kota Arima, Rong Zhong, Tomotaka Ugai, Melissa Zhao, Koichiro Haruki, Naohiko Akimoto, Mai Chan Lau, Kazuo Okadome, Raaj S. Mehta, Juha P. Väyrynen, Junko Kishikawa, Tyler S. Twombly, Shanshan Shi, Kenji Fujiyoshi, Keisuke Kosumi, Yoko Ogata, Hideo Baba, Fenglei Wang,Kana Wu, Mingyang Song, Xuehong Zhang, Charles S. Fuchs, Cynthia L. Sears, Walter C. Willett, Edward L. Giovannucci, Jeffrey A. Meyerhardt, Wendy S. Garrett, Curtis Huttenhower, Andrew T. Chan, Jonathan A. Nowak, Marios Giannakis, Shuji Ogino, Published:June 24, 2022 DOI:https://doi.org/10.1053/j.gastro.2022.06.054

Gastroenterologycancercolorectal cancermicrobialbacteriaDNAwestern-style diettumorpolyketide synthasepks
Source : Gastroenterology
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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