Prevention of Severe Intestinal Barrier Dysfunction Through a Single-Species Probiotics is Associated With the Activation of Microbiome-Mediated Glutamate–Glutamine Biosynthesis

Introduction: Intra-abdominal hypertension (IAH), the leading complication in the intensive care unit, significantly disturbs the gut microbial composition by decreasing the relative abundance of Lactobacillus and increasing the relative abundance of opportunistic infectious bacteria. Methods: To evaluate the preventative effect of Lactobacillus-based probiotics on IAH-induced intestinal barrier damages, a single-species probiotics (L92) and a multispecies probiotics (VSL#3) were introduced orally to Sprague-Dawley rats for 7 days before inducing IAH. The intestinal histology and permeability to macromolecules (fluoresceine isothiocyanate, FITC-dextran, N = 8 for each group), the parameters of immunomodulatory and oxidative responses [monocyte chemotactic protein 1 (MCP-1), interleukin-1β (IL-1β), interleukin-4 (IL-4), interleukin-10 (IL-10), malonaldehyde, glutathione peroxidase (GSH- Px), catalase (CAT), and superoxide dismutase; N = 4 for each group], and the microbiome profiling (N = 4 for each group) were analyzed. Results: Seven-day pretreatments of L92 significantly alleviated the IAH-induced increase in intestinal permeability to FITC-dextran and histological damage (P 
Source: Shock - Category: Emergency Medicine Tags: Basic Science Aspects Source Type: research