Related Experiment Video
Updated: Jun 20, 2026

Investigating the Alleviating Effects of Bacillus cereus Administration on Colitis through Gut Microbiota Modulation
Published on: July 27, 2022
Oral administration of live Bifidobacterium substrains isolated from centenarians enhances intestinal function in
Haiying Yang1, Aiping Liu, Ming Zhang
1College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China.
Abstract:
We studied the effects of two bifidobacteria strains isolated from healthy centenarians on intestinal function in mice. Bifidobacterium adolescentis BBMN23 and Bifidobacterium longum BBMN68 were orally administrated to specific pathogen-free BALB/c mice at different doses (2 x 10(11), 2 x 10(9), or 2 x 10(7) CFU/kg body weight) each day for 4 weeks. Villus height, crypt depth, villus width, and villus/crypt ratio (V/C) were determined. The content of duodenal secreted immunoglobulin A (sIgA) was also evaluated. There were clear increases in height and width of duodenal villi in both treated groups. Crypt depths were deeper in animals treated with BBMN23 than in controls, while depths were reduced in animals receiving BBMN68. The V/C ratio was increased after feeding with BBMN68, while BBMN23 had no significant effect. Both strains improved the sIgA content of the duodenum. These results suggest that BBMN23 and BBMN68 may improve intestinal digestion and ability and enhance immune barrier function in the intestine.
Related Concept Videos
Development of Human Microbiota
Probiotics
Microbiota Modulation by Antibiotics
Microbiota of the Large Intestine

