Colon Cancer Biomarkers Appear Within Weeks of Diet Change

Share this content:
Westernization of the diet induces changes in biomarkers of colon cancer risk within two weeks.
Westernization of the diet induces changes in biomarkers of colon cancer risk within two weeks.

Westernization of the diet induces changes in biomarkers of colon cancer risk within two weeks, according to research published in Nature Communications.

The new study involved a group of 20 black American volunteers and 20 more participants from rural South Africa. Under close supervision, the participants swapped diets for two weeks. Before the switch, however, all of the participants underwent colonoscopies.

A second procedure was performed at the end of the study period. The researchers also assessed certain risk factors for colon cancer, including biological markers for the disease. And they examined bacteria samples taken from the participants' colons.

When the study began, nearly 50 percent of those in the American group had polyps, or abnormal growths, in the lining of their colon. Although these growths are not harmful, they could eventually lead to cancer, the researchers noted.

In contrast, none of the volunteers from South Africa had polyps upon entry to the study. After two weeks of eating the African diet, the American volunteers showed dramatic reductions in colon inflammation. They also showed declines in certain other signals tied to colon cancer risk.

On the other hand, colon cancer risk factors rose significantly among the Africans who made the switch to a high-fat, high-protein, low-fiber American-style diet, the team said.

RELATED: Decreased Muscle Mass Linked with Higher Toxicity, Poorer Prognosis Risk in Colon Cancer

"We can't definitively tell from these measurements that the change in their diet would have led to more cancer in the African group or less in the American group, but there is good evidence from other studies that the changes we observed are signs of cancer risk," study coauthor Jeremy Nicholson, Ph.D., of Imperial College London, said in a college news release.

The good news, he said, is that "people can substantially lower their risk of colon cancer by eating more fiber. This is not new in itself but what is really surprising is how quickly and dramatically the risk markers can switch in both groups following diet change."

Reference

  1. O'Keefe, Stephen J. D., et al. "Fat, fibre and cancer risk in African Americans and rural Africans." Nature Communications. doi:10.1038/ncomms7342. [epub ahead of print]. April 28, 2015.

Related Resources

You must be a registered member of Cancer Therapy Advisor to post a comment.

Regimen and Drug Listings

GET FULL LISTINGS OF TREATMENT Regimens and Drug INFORMATION

Bone Cancer Regimens Drugs
Brain Cancer Regimens Drugs
Breast Cancer Regimens Drugs
Endocrine Cancer Regimens Drugs
Gastrointestinal Cancer Regimens Drugs
Gynecologic Cancer Regimens Drugs
Head and Neck Cancer Regimens Drugs
Hematologic Cancer Regimens Drugs
Lung Cancer Regimens Drugs
Other Cancers Regimens
Prostate Cancer Regimens Drugs
Rare Cancers Regimens
Renal Cell Carcinoma Regimens Drugs
Skin Cancer Regimens Drugs
Urologic Cancers Regimens Drugs

Sign Up for Free e-newsletters