In:
Frontiers in Immunology, Frontiers Media SA, Vol. 12 ( 2021-12-16)
Abstract:
Intestinal inflammation is a major threat to the health and growth of young animals such as piglets. As a next-generation probiotics, limited studies have shown that Akkermansia muciniphila could alleviate inflammation of intestinal epithelial cells (IECs). In this study, a TNF-α-induced inflammatory model of IPEC-J2 cells, the intestinal porcine enterocytes, was built to evaluate the effects of active or inactive A. muciniphila on the inflammation of IECs. The viability of IPEC-J2 cells was the highest when treated with active (10 8 copies/mL) or inactive (10 9 copies/mL) A. muciniphila for 7.5 h ( P & lt; 0.01). Treated with 20 ng/mL of TNF-α and followed by a treatment of A. muciniphila , the mRNA level of proinflammatory cytokines ( IL-8, IL-1β , IL-6 and TNF-α ) was remarkably reduced ( P & lt; 0.05) along with the increased mRNA level of tight junction proteins ( ZO-1 and Occludin , P & lt; 0.05). Flow cytometry analysis showed that active or inactive A. muciniphila significantly suppressed the rate of the early and total apoptotic of the inflammatory IPEC-J2 cells ( P & lt; 0.05). According to results of transcriptome sequencing, active and inactive A. muciniphila may decline cell apoptosis by down-regulating the expression of key genes in calcium signaling pathway, or up-regulating the expression of key genes in cell cycle signaling pathway. And the bacterium may alleviate the inflammation of IECs by down-regulating the expression of PI3K upstream receptor genes. Our results indicate that A. muciniphila may be a promising NGP targeting intestinal inflammation.
Type of Medium:
Online Resource
ISSN:
1664-3224
DOI:
10.3389/fimmu.2021.788638
Language:
Unknown
Publisher:
Frontiers Media SA
Publication Date:
2021
detail.hit.zdb_id:
2606827-8
