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Plasma (carotenoids, retinol, alpha-tocopherol) and tissue (carotenoids) levels after supplementation with beta-carotene in subjects with precancerous and cancerous lesions of sigmoid colon. 1997

G Pappalardo, and G Maiani, and S Mobarhan, and A Guadalaxara, and E Azzini, and A Raguzzini, and M Salucci, and M Serafini, and M Trifero, and G Illomei, and A Ferro-Luzzi
Institute of II Clinica Chirurgica University of Rome La Sapienza, Italy.

OBJECTIVE (1) To compare tissue and plasma carotenoids status of healthy subjects and subjects with pre-cancer and cancer lesions; (2) to evaluate the effect of beta-carotene supplementation on the concentrations of other carotenoids in tissue (luteine + zeaxanthin, cryptoxanthin, lycopene, alpha-carotene) and in plasma and also retinol and alpha-tocopherol levels. METHODS Eighteen subjects were divided into three groups on the basis of colonoscopy and histological analytical findings: four healthy subjects (control group A); seven subjects affected by adenomatous polyps (group B with pre-cancer lesions); seven subjects suffering from colonic cancer (group C). Blood and colonic biopsy samples were taken (of colon and rectal mucosa) before and after beta-carotene supplementation in all subjects. Groups A and B received a daily dose of beta-carotene (30 mg/die) for 43 d. Group C's supplementation was terminated at the time which was performed, usually within 15 d. The tissue and plasma concentration of carotenoids, retinol and alpha-tocopherol were determined by high-performance liquid chromatography. RESULTS The tissue concentrations of each carotenoid were similar in all the intestinal sites examined as regards groups A and B, although there was a high degree of intra individual variability within each group. Only beta-carotene made significant increases (P < 0.001) after supplementation. The subjects with cancer show tissue levels for each carotenoid lower than those of healthy subjects or subjects with polypous. The plasma levels of alpha-tocopherol did not change after supplementation while significant increases were noted of retinol, alpha-carotene (P < 0.01) and of beta-carotene (P < 0.001). CONCLUSIONS The patients with colonic cancer seemed to undergo a significant reduction in their antioxidant reserves with respect to the normal subjects and or polyps. We can confirm that oral B-carotene supplementation induces also an increase in plasma alpha-carotene in all groups.

UI MeSH Term Description Entries
D007413 Intestinal Mucosa Lining of the INTESTINES, consisting of an inner EPITHELIUM, a middle LAMINA PROPRIA, and an outer MUSCULARIS MUCOSAE. In the SMALL INTESTINE, the mucosa is characterized by a series of folds and abundance of absorptive cells (ENTEROCYTES) with MICROVILLI. Intestinal Epithelium,Intestinal Glands,Epithelium, Intestinal,Gland, Intestinal,Glands, Intestinal,Intestinal Gland,Mucosa, Intestinal
D008297 Male Males
D008875 Middle Aged An adult aged 45 - 64 years. Middle Age
D011125 Adenomatous Polyposis Coli A polyposis syndrome due to an autosomal dominant mutation of the APC genes (GENES, APC) on CHROMOSOME 5. The syndrome is characterized by the development of hundreds of ADENOMATOUS POLYPS in the COLON and RECTUM of affected individuals by early adulthood. Polyposis Coli, Familial,Polyposis Syndrome, Familial,Adenomatous Polyposis Coli, Familial,Adenomatous Polyposis of the Colon,Familial Adenomatous Polyposis,Familial Adenomatous Polyposis Coli,Familial Adenomatous Polyposis of the Colon,Familial Intestinal Polyposis,Familial Multiple Polyposi,Familial Multiple Polyposis,Familial Multiple Polyposis Syndrome,Familial Polyposis Coli,Familial Polyposis Syndrome,Familial Polyposis of the Colon,Hereditary Polyposis Coli,Myh-Associated Polyposis,Polyposis Coli,Polyposis, Adenomatous Intestinal,Adenomatous Intestinal Polyposes,Adenomatous Intestinal Polyposis,Adenomatous Polyposes, Familial,Adenomatous Polyposis Colus,Adenomatous Polyposis, Familial,Coli, Adenomatous Polyposis,Coli, Familial Polyposis,Coli, Hereditary Polyposis,Coli, Polyposis,Colus, Adenomatous Polyposis,Colus, Familial Polyposis,Colus, Hereditary Polyposis,Colus, Polyposis,Familial Adenomatous Polyposes,Familial Intestinal Polyposes,Familial Multiple Polyposes,Familial Multiple Polyposus,Familial Polyposis Colus,Familial Polyposis Syndromes,Hereditary Polyposis Colus,Intestinal Polyposes, Familial,Intestinal Polyposis, Adenomatous,Intestinal Polyposis, Familial,Multiple Polyposes, Familial,Multiple Polyposi, Familial,Multiple Polyposis, Familial,Multiple Polyposus, Familial,Myh Associated Polyposis,Myh-Associated Polyposes,Polyposes, Familial Adenomatous,Polyposes, Familial Multiple,Polyposes, Myh-Associated,Polyposi, Familial Multiple,Polyposis Coli, Adenomatous,Polyposis Coli, Hereditary,Polyposis Colus,Polyposis Colus, Adenomatous,Polyposis Colus, Familial,Polyposis Colus, Hereditary,Polyposis, Familial Adenomatous,Polyposis, Familial Multiple,Polyposis, Myh-Associated,Polyposus, Familial Multiple
D011230 Precancerous Conditions Pathological conditions that tend eventually to become malignant. Preneoplastic Conditions,Condition, Preneoplastic,Conditions, Preneoplastic,Preneoplastic Condition,Condition, Precancerous,Conditions, Precancerous,Precancerous Condition
D002338 Carotenoids The general name for a group of fat-soluble pigments found in green, yellow, and leafy vegetables, and yellow fruits. They are aliphatic hydrocarbons containing 4 terpene subunits. Carotenes,Carotenoid,Tetraterpene Derivatives,Tetraterpenes,Carotene,Derivatives, Tetraterpene
D003110 Colonic Neoplasms Tumors or cancer of the COLON. Cancer of Colon,Colon Adenocarcinoma,Colon Cancer,Cancer of the Colon,Colon Neoplasms,Colonic Cancer,Neoplasms, Colonic,Adenocarcinoma, Colon,Adenocarcinomas, Colon,Cancer, Colon,Cancer, Colonic,Cancers, Colon,Cancers, Colonic,Colon Adenocarcinomas,Colon Cancers,Colon Neoplasm,Colonic Cancers,Colonic Neoplasm,Neoplasm, Colon,Neoplasm, Colonic,Neoplasms, Colon
D005260 Female Females
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000328 Adult A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available. Adults

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