RT Generic T1 Immune-Mediated Mechanisms of Action of Probiotics and Synbiotics in Treating Pediatric Intestinal Diseases A1 Plaza-Diaz, Julio A1 Javier Ruiz-Ojeda, Francisco A1 Gil-Campos, Mercedes A1 Gil, Angel K1 probiotics K1 pediatric gastrointestinal infection K1 mechanism of action K1 intestinal microbiota K1 immune system K1 Lactobacillus-rhamnosus gg K1 Helicobacter-pylori infection K1 Respiratory-tract infections K1 Long-term safety K1 Day-care-centers K1 Double-blind K1 Necrotizing enterocolitis K1 Acute gastroenteritis K1 Prophylactic probiotics K1 Bacterial-colonization AB The pediatric population is continually at risk of developing infectious and inflammatory diseases. The treatment for infections, particularly gastrointestinal conditions, focuses on oral or intravenous rehydration, nutritional support and, in certain case, antibiotics. Over the past decade, the probiotics and synbiotics administration for the prevention and treatment of different acute and chronic infectious diseases has dramatically increased. Probiotic microorganisms are primarily used as treatments because they can stimulate changes in the intestinal microbial ecosystem and improve the immunological status of the host. The beneficial impact of probiotics is mediated by different mechanisms. These mechanisms include the probiotics' capacity to increase the intestinal barrier function, to prevent bacterial transferation and to modulate inflammation through immune receptor cascade signaling, as well as their ability to regulate the expression of selected host intestinal genes. Nevertheless, with respect to pediatric intestinal diseases, information pertaining to these key mechanisms of action is scarce, particularly for immune-mediated mechanisms of action. In the present work, we review the biochemical and molecular mechanisms of action of probiotics and synbiotics that affect the immune system. PB Mdpi SN 2072-6643 YR 2018 FD 2018-01-01 LK http://hdl.handle.net/10668/19319 UL http://hdl.handle.net/10668/19319 LA en DS RISalud RD May 11, 2025