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resistant starch (RS) is not completely digested in the human intestine but is fermented in the colon; intestinal pH decreases as short-chain fatty acids are produced. This is beneficial for health, and for preventing and treating rectal colon cancer. Pyrodextrinization and enzymatic hydrolysis are modifications to native starch (NS) that may increase the amount of RS. Objective: the objective of this project was to evaluate the effects of M. cavendish AAA native and both chemically and enzymatically modified starches on tumor markers in rats. Methods: modifications (chemical and enzymatic) were made to M. cavendish AAA NS, and were evaluated in rats with 1,2-DMH. Male Sprague Dawley rats (25) were used, divided into five experimental groups: PC, NC, NS, PI, and ERM. During 4 weeks they received the experimental diet assigned to each group. The PC, NS, PI and ERM groups received 2 weekly s.c. (subcutaneous) injections of 1,2-DMH (40 mg/kg) (third and fourth week). In feces, pH, β-glucuronidase enzyme, and short-chain fatty acids were evaluated, and a histopathological study was performed of the intestine to detect microscopic lesions. Results: the activity of β-glucuronidase decreased (p &lt; 0.05) for NS, PI and ERM vs. PC. The highest proportion of butyric acid was observed in the NS (p &lt; 0.05) vs. NC group. Sixty percent of enteritides were severe in grade in the PC group, and 40 % in the experimental groups. Conclusions: native starch granules resisted pyrodextrinization, but treatment with α-amylase broke the structure of the pyrodextrin granule. According to the treatments given to the rats, as the amount of RS present in the diet increases (NS), the neoplastic cells do not advance beyond the basement membrane, suggesting a possible cell-protective or anticancer effect.

Anticancer effect of modified banana (Musa cavendish AAA) starch in rats with 1-2 dimethylhydrazine