PMID- 37375559 OWN - NLM STAT- MEDLINE DCOM- 20230629 LR - 20230701 IS - 2072-6643 (Electronic) IS - 2072-6643 (Linking) VI - 15 IP - 12 DP - 2023 Jun 7 TI - Lactiplantibacillus plantarum OLL2712 Induces Autophagy via MYD88 and Strengthens Tight Junction Integrity to Promote the Barrier Function in Intestinal Epithelial Cells. LID - 10.3390/nu15122655 [doi] LID - 2655 AB - Autophagy is an important system conserved in eukaryotes that maintains homeostasis by degrading abnormal proteins. Autophagy incompetence in intestinal epithelial cells causes the abnormal function of intestinal stem cells and other cells and damages intestinal barrier function. The disruption of the intestinal barrier causes chronic inflammation throughout the body, followed by impaired glucose and lipid metabolism. Lactiplantibacillus plantarum OLL2712 (OLL2712) is a lactic acid bacterium that induces interleukin-10 production from immune cells, alleviates chronic inflammation, and improves glucose and lipid metabolism. In this study, we hypothesized that OLL2712 exerts anti-inflammatory effects by inducing autophagy and ameliorating intestinal barrier dysfunction, and we investigated its autophagy-inducing activities and functions. Caco-2 cells stimulated with OLL2712 for 24 h showed an increased number of autolysosomes per cell, compared with unstimulated cells. Therefore, the permeability of fluorescein isothiocyanate dextran 4000 (FD-4) was suppressed by inducing autophagy. In contrast, mucin secretion in HT-29-MTX-E12 cells was also increased by OLL2712 but not via autophagy induction. Finally, the signaling pathway involved in autophagy induction by OLL2712 was found to be mediated by myeloid differentiation factor 88 (MYD88). In conclusion, our findings suggest that OLL2712 induces autophagy in intestinal epithelial cells via MYD88, and that mucosal barrier function is strengthened by inducing autophagy. FAU - Watanabe-Yasuoka, Yumiko AU - Watanabe-Yasuoka Y AD - Food Microbiology and Function Research Laboratories, Division of Research and Development, Meiji Co., Ltd., Hachiouji, Tokyo 192-0919, Japan. FAU - Gotou, Ayako AU - Gotou A AD - Food Microbiology and Function Research Laboratories, Division of Research and Development, Meiji Co., Ltd., Hachiouji, Tokyo 192-0919, Japan. FAU - Shimizu, Shigeomi AU - Shimizu S AD - Department of Pathological Cell Biology, Medical Research Institute, Tokyo Medical and Dental University, Tokyo 113-8510, Japan. FAU - Sashihara, Toshihiro AU - Sashihara T AUID- ORCID: 0000-0001-7617-0987 AD - Food Microbiology and Function Research Laboratories, Division of Research and Development, Meiji Co., Ltd., Hachiouji, Tokyo 192-0919, Japan. LA - eng PT - Journal Article DEP - 20230607 PL - Switzerland TA - Nutrients JT - Nutrients JID - 101521595 RN - 0 (Myeloid Differentiation Factor 88) RN - IY9XDZ35W2 (Glucose) SB - IM MH - Humans MH - *Myeloid Differentiation Factor 88/metabolism MH - *Tight Junctions/metabolism MH - Caco-2 Cells MH - Epithelial Cells/metabolism MH - Inflammation/metabolism MH - Autophagy MH - Glucose/metabolism MH - Intestinal Mucosa/metabolism MH - Permeability PMC - PMC10300898 OTO - NOTNLM OT - autophagy OT - intestinal barrier OT - lactic acid bacteria OT - mucin 2 OT - myeloid differentiation factor 88 COIS- Y.W.-Y., A.G., and T.S. are employees of Meiji Co., Ltd. Y.W.-Y., T.S., and S.S. are the inventors of the pending patent WO2023/28754 A1. EDAT- 2023/06/28 06:42 MHDA- 2023/06/29 06:42 PMCR- 2023/06/07 CRDT- 2023/06/28 01:34 PHST- 2023/05/24 00:00 [received] PHST- 2023/06/03 00:00 [revised] PHST- 2023/06/05 00:00 [accepted] PHST- 2023/06/29 06:42 [medline] PHST- 2023/06/28 06:42 [pubmed] PHST- 2023/06/28 01:34 [entrez] PHST- 2023/06/07 00:00 [pmc-release] AID - nu15122655 [pii] AID - nutrients-15-02655 [pii] AID - 10.3390/nu15122655 [doi] PST - epublish SO - Nutrients. 2023 Jun 7;15(12):2655. doi: 10.3390/nu15122655.