A dietary trial with a short-term low-sucrose diet in an Italian population: effects on colorectal mucosal proliferation.
Colorectal mucosal proliferation is supposed to predict colon cancer risk. We investigated whether a low-sucrose diet might reduce colorectal mucosal proliferation in a group of patients at higher risk of colorectal cancer after at least two colon adenoma resections. In a pilot phase, 14 patients [12 men and 2 women, 60.3 +/- 5 (SD) yr] were instructed to adopt a low-sucrose diet for one month. Colorectal biopsies were taken twice in the same patients, at the start and the end of the intervention period, and mucosal proliferation was measured by [3H]thymidine uptake in vitro and autoradiography. Although compliance of study participants to dietary modification was high, only a few agreed to two consecutive endoscopies; thus we carried out a randomized study, and 107 patients were assigned to a low-sucrose diet (50 treated patients: 31 men and 19 women, 59.7 +/- 7.5 yr) or instructed to continue their usual diet for one month (55 control patients: 32 men and 23 women, 59.6 +/- 7.7 yr). At the end of this period, colorectal biopsies were obtained. The results of the pilot phase and the randomized study showed that a low-sucrose diet for one-month did not affect proliferation or the distribution of proliferation activity along the crypt. The food-frequency questionnaires indicated that treated patients consumed significantly less sucrose (and fewer total calories) during the dietary modification. Urinary fructose, a measure of dietary sucrose intake, was also reduced at the end of the intervention period. In conclusion, we found no evidence that a low-sucrose diet for one month influences colorectal mucosal proliferation.
Caderni
G
G
Department of Pharmacology, University of Florence, Italy. gioca@server1.pharm.unifi.it
Lancioni
L
L
Palli
D
D
Saieva
C
C
Trallori
G
G
Manneschi
L
L
Renai
F
F
Marcoccia
M
M
Russo
A
A
Dolara
P
P
D000328:Adult; D000368:Aged; D001706:Biopsy; D002455:Cell Division; D003111:Colonic Polyps / Q000150:complications / Q000601:surgery; D015179:Colorectal Neoplasms / Q000209:etiology / Q000517:prevention & control*; D019422:Dietary Sucrose / Q000008:administration & dosage*; D005260:Female; D005632:Fructose / Q000652:urine; D006801:Humans; D007413:Intestinal Mucosa / Q000473:pathology*; D007558:Italy; D008297:Male; D008875:Middle Aged; D010349:Patient Compliance; D010865:Pilot Projects; D012307:Risk Factors; D011795:Surveys and Questionnaires
D019422:Dietary Sucrose; D005632:Fructose