PMID- 33126251 OWN - NLM STAT- MEDLINE DCOM- 20210503 LR - 20230216 IS - 2156-5376 (Electronic) IS - 2161-8313 (Print) IS - 2161-8313 (Linking) VI - 12 IP - 2 DP - 2021 Mar 31 TI - Perspective: Prospects for Nutraceutical Support of Intestinal Barrier Function. PG - 316-324 LID - 10.1093/advances/nmaa139 [doi] AB - Impairment of intestinal barrier function is linked to certain pathologies and to aging, and can be a cause of bacterial infections, systemic and hepatic inflammation, food allergies, and autoimmune disorders. The formation and maintenance of intestinal tight junctions is supported by glucagon-like peptide-2 (GLP-2), which via insulin-like growth factor I activity boosts phosphoinositide 3-kinase/Akt/mammalian target of rapamycin complex 1 (PI3K/Akt/mTORC1) signaling in enterocytes. 5'-AMP-activated protein kinase (AMPK) activity as well as estrogen receptor-beta (ERbeta) activity are also protective in this regard. Conversely, activation of mitogen-activated protein kinases (MAPKs) and cellular Src (c-Src) under inflammatory conditions can induce dissociation of tight junctions. Hence, nutraceuticals that promote GLP-2 secretion from L cells-effective pre/probiotics, glycine, and glutamine-as well as diets rich in soluble fiber or resistant starch, can support intestinal barrier function. AMPK activators-notably berberine and the butyric acid produced by health-promoting microflora-are also beneficial in this regard, as are soy isoflavones, which function as selective agonists for ERbeta. The adverse impact of MAPK and c-Src overactivation on the intestinal barrier can be combatted with various antioxidant measures, including phycocyanobilin, phase 2-inducer nutraceuticals, and N-acetylcysteine. These considerations suggest that rationally designed functional foods or complex supplementation programs could have clinical potential for supporting and restoring healthful intestinal barrier function. CI - (c) The Author(s) 2020. Published by Oxford University Press on behalf of the American Society for Nutrition. FAU - McCarty, Mark F AU - McCarty MF AD - Catalytic Longevity, San Diego, CA, USA. FAU - Lerner, Aaron AU - Lerner A AD - Chaim Sheba Medical Center, Zabludowicz Center for Autoimmune Diseases, Tel-Hashomer, Israel. LA - eng PT - Journal Article PL - United States TA - Adv Nutr JT - Advances in nutrition (Bethesda, Md.) JID - 101540874 SB - IM MH - Dietary Supplements MH - Humans MH - *Intestinal Mucosa MH - *Phosphatidylinositol 3-Kinases MH - Signal Transduction MH - Tight Junctions PMC - PMC8243597 OTO - NOTNLM OT - N-acetylcysteine OT - AMPK OT - berberine OT - butyric acid OT - glucagon-like peptide 2 OT - intestinal barrier OT - intestinal permeability OT - nutraceuticals OT - phycocyanobilin OT - tight junction EDAT- 2020/10/31 06:00 MHDA- 2021/05/04 06:00 PMCR- 2021/10/30 CRDT- 2020/10/30 20:16 PHST- 2020/07/23 00:00 [received] PHST- 2020/08/28 00:00 [revised] PHST- 2020/09/24 00:00 [accepted] PHST- 2020/10/31 06:00 [pubmed] PHST- 2021/05/04 06:00 [medline] PHST- 2020/10/30 20:16 [entrez] PHST- 2021/10/30 00:00 [pmc-release] AID - S2161-8313(22)00186-7 [pii] AID - nmaa139 [pii] AID - 10.1093/advances/nmaa139 [doi] PST - ppublish SO - Adv Nutr. 2021 Mar 31;12(2):316-324. doi: 10.1093/advances/nmaa139.