Caecal parameters of rats fed diets supplemented with inulin in exchange for sucrose.
The effects of different modes of inulin supplementation on caecal fermentation were evaluated in rats. Groups S and IN were fed diets containing 5% of sucrose or inulin, respectively, for the whole experimental period of 40 days. Group IN/S was fed IN and S diets, whereas group S/IN was fed S and IN diets, in the first and the second 20-day period, respectively. Groups IN(up) and IN(down) were fed diets in which the content of inulin increased from 1-5% and decreased from 5-1%, every 8 days, respectively. The common effects of inulin on caecal fermentation, i.e. enlargement of tissue, acidification of digesta, a decrease in activities of potentially harmful bacterial enzymes (beta-glucuronidase and beta-glucosidase), and an increase in the total volatile fatty acids concentration and pool, were especially observed in the IN, S/IN and IN(up) groups. The results suggested that the intensity of caecal fermentation is increased when inulin is present at a relatively high dietary level and that these changes are easily reversible after inulin withdrawal from feed.
Juśkiewicz
Jerzy
J
Institute of Animal Reproduction and Food Research of the Polish Academy of Sciences, Division of Food Science, Olsztyn, Poland. glebczo@pan.olsztyn.pl
Zduńczyk
Zenon
Z
Frejnagel
Sławomir
S
D000821:Animal Feed; D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D001419:Bacteria / Q000201:enzymology / Q000378:metabolism; D002432:Cecum / Q000378:metabolism* / Q000382:microbiology; D019422:Dietary Sucrose / Q000008:administration & dosage* / Q000494:pharmacology; D019587:Dietary Supplements; D004305:Dose-Response Relationship, Drug; D005232:Fatty Acids, Volatile / Q000096:biosynthesis; D005285:Fermentation / Q000187:drug effects*; D007328:Insulin / Q000008:administration & dosage* / Q000494:pharmacology; D008297:Male; D009929:Organ Size; D011897:Random Allocation; D051381:Rats; D017208:Rats, Wistar
D019422:Dietary Sucrose; D005232:Fatty Acids, Volatile; D007328:Insulin