Colorectal Cancer
Conditions
Keywords
Colorectal cancer, Processed meat, Calcium, Vitamin E, Preventive strategies
Brief summary
Colorectal cancer kills forty five people in France every day. Epidemiological studies suggest that two cases out of three could be prevented and show that processed meat intake is a consistent risk factor. The aim of this study is to understand how meat promotes cancer, to find protective strategies, and to make compelling dietary recommendations.
Detailed description
18 healthy volunteers will be randomized and will start the study. The study will last 4 weeks for each subject. The first week will be a week of adaptation (or run-in period) to the diet which they will have to follow for the duration of study. During this period, they will collect 2 samples of stools and urine. Then subjects will alternate 4 days of diet either with ham, or with ham and calcium, or with ham enriched with vitamin E. At least, 3 days will separate every period (wash-out) of nutritional intervention. Urines and stools will be collected last 3 days of every interventional period and also last day of every wash out period.
Interventions
OTHERHam
Ham : 180 g per day during 4 days
OTHERHam + calcium
Ham : 160g/d during 4 days calcium : 1000mg/d during 4 days
OTHERHam + vitamin E
Ham : 160g/d during 4 days Vitamin E : 80 mg/d during 4 days
Sponsors
Centre de Recherche en Nutrition Humaine d'Auvergne
Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement
Study design
Allocation
RANDOMIZED
Intervention model
CROSSOVER
Primary purpose
BASIC_SCIENCE
Masking
SINGLE (Subject)
Eligibility
Sex/Gender
MALE
Age
40 Years to 75 Years
Healthy volunteers
Yes
Inclusion criteria
* Male * Body mass index 20 \<= BMI \<= 30 kg/m2 * Affiliated to French National Health Insurance * Subject giving his written informed consent * Subject considered as normal after clinical examination and medical questionnaire
Exclusion criteria
* Positive serologies to HIV or HCV, determined on blood samples * Previous medical and/or surgery judged by the investigator as incompatible with this study * Previous familial of colon, ovarian or breast cancer * Chronic pathologies : cardiovascular diseases, cancer, chronic inflammation diseases, renal, intestinal impairments * Dislike ham * Heavy consumer of alcohol * Practising intensive physical exercise * Being under someone's supervision * Refusal to be registered on the National Volunteers Data file * Dietary habits unreliable to controlled food intake * Being in exclusion on the National Volunteers Data file
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Urinary biomarker (DHN-MA:dihydroxynonene mercapturic acid), will be measured before and after every interventional period | Twice a week, before and after every 4 days of interventional period |
Secondary
| Measure | Time frame |
|---|---|
| Fecal biomarkers | twice a week, before and after every 4 days of interventional period |
Countries
France
Outcome results
None listed