Your journey
1What's a trial
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More info
You can access this
clinical trial
if you have
Colon Cancer
and you are
between 40 and 70
years old
The phase for this study is not defined.
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The purpose

Alaska native people (AN) have the highest recorded incidence and death rate from colon cancer in the world (>90:100,000). We hypothesize that the AN, despite their high consumption of anti-inflammatory and antineoplastic n-3 fish oils, are at increased risk of colon cancer because of colonic butyrate deficiency resulting from their remarkably low consumption of fiber-containing foods. We hypothesize that fiber supplementation of their usual diet will result in a bloom of butyrate producing microbes in the colon, resulting in increased butyrate production, which will suppress their high microbial secondary bile acid production, antagonize the actions of other food (smoked fish) and environmental carcinogens (tobacco, alcohol), and interact with the high circulating levels of n-3 fish oils to suppress colonic inflammation and cancer risk. In order to investigate this, we will conduct a randomized double-blinded 4-week clinical trial in up to 100 randomizable healthy, middle-aged AN undergoing screening colonoscopy, with the objective of obtaining 60 completed interventions. The interventions will consist of either a high-dose soluble fiber supplement given as a drink, together with their usual diet which currently contains about 15g total fiber/d, or to a control digestible starch drink plus their usual diet. The primary endpoint will be a clinically significant reduction in Ki67 proliferative colonic mucosal biomarkers of cancer risk. Microbiome and metabolome mechanisms responsible for the anticipated changes in mucosal biomarkers will also be investigated. Our results in extreme risk AN will be further evaluated by comparison to similar measurements previously made in minimal risk rural Africans and intermediate risk African Americans. Our results will be used to provide the scientific basis for a definitive large-scale high-fiber supplementation study (to achieve >50g total fiber/d) to suppress adenomatous polyp recurrence following colonoscopy.

Provided treatments

  • : 70g of fully digestible starch amylopectin corn starch
  • : Resistant starch
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Locations near you

Unfortunately, there are no recruiting locations near you. Please check the list with all locations below.
Tris trial is registered with FDA with number: NCT03028831. The sponsor of the trial is University of Pittsburgh and it is looking for 60 volunteers for the current phase.
Official trial title:
Randomized Controlled Trial of Resistant Starch to Reduce Colon Cancer Risk in Alaska Native People.