Portulaca oleracea Polysaccharides Modulate Intestinal Microflora in Aged Rats in vitro

Qiang Fu; Siyi Zhou; Mengting Yu; Yang Lu; Genhe He; Xiaoliu Huang; Yushan Huang

doi:10.3389/fmicb.2022.841397

Portulaca oleracea Polysaccharides Modulate Intestinal Microflora in Aged Rats in vitro

Front Microbiol. 2022 Mar 4:13:841397. doi: 10.3389/fmicb.2022.841397. eCollection 2022.

Authors

Qiang Fu^{1

2}, Siyi Zhou^{1

2}, Mengting Yu^{1

2}, Yang Lu^{1

2}, Genhe He³, Xiaoliu Huang^{1

2}, Yushan Huang⁴

Affiliations

¹ College of Medicine, Jinggangshan University, Ji'an, China.
² Ji'an Key Laboratory of Biomedicine, Ji'an, China.
³ School of Life Sciences, Jinggangshan University, Ji'an, China.
⁴ Center for Evidence Based Medical and Clinical Research, First Affiliated Hospital of Gannan Medical University, Ganzhou, China.

Abstract

To explore the effect of Portulaca oleracea polysaccharides (POP) in regulating intestinal microflora in aged rats in vitro, its intestinal microbial composition was analyzed by 16 S rDNA high-throughput sequencing, and the level of short-chain fatty acids in fermentation broth was determined by LC-MS. POP significantly upregulated the relative abundance of Lactobacillus, Eggerthella, and Paraprevotella and significantly downregulated Escherichia_Shigella, Bacteroides, and Eubacterium nodatum groups. The pH value and ammonia nitrogen level decreased significantly in the POP-treated group, resulting in a more short-chain fatty acid consumption which changed the acid-base environment of the fermentation broth. In conclusion, POP is beneficial to aged rats because it can regulate intestinal flora, promote the growth of probiotics, and inhibit the reproduction of pathogenic bacteria.

Keywords: Portulaca oleracea polysaccharides; aged rats; in vitro fermentation; intestinal microflora; probiotics.