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Some Lacticaseibacillus rhamnosus strains have beneficial effects on their host and are considered probiotics. Lacticaseibacillus rhamnosus GG (LGG) was originally isolated in 1983 from the intestinal tract of a healthy adult, and was initially used for the treatment of relapsing Clostridioides difficile colitis [Gorbach87]. The use of the strain was patented in 1985 by Sherwood Gorbach and Barry Goldin (hence the GG in its name) [Gorbach96]. Since then LGG has been used for various health effects including the prevention and treatment of gastro-intestinal infections and diarrhea and stimulation of immune responses, and is currently one of the most widely studied probiotic strains.
LGG produces exopolysaccharides rich in galactose residues and specific adhesive pili that enable it to adhere exceptionally well to the gastrointestinal mucosa [Kankainen09, Lebeer09]. It is able to withstand gastric acidity and bile salts effectively by producing anti-stress proteins [Conway87, Goldin92].
In addition to its antibacterial activity, LGG has several anti-inflammatory effects on its host [Khailova17]. The effect on the host's immune system is explained by the stimulation of different host cytokines such as TNF-α, IL-1β, IL-6, IL-10, IL-12, IFN-γ. LGG produces and secretes proteins (Msp1 and Msp2) that reduce the inflammatory state and apoptosis of intestinal epithelial cells [Yan07, Claes12]. Other apoptotic inhibition mechanisms are related to the modulation of cyclooxygenase-2 (COX-2) [Korhonen04, Ciorba12, Uribe18], leading to preclinical trials related to use of LGG against cancer [Banna17].
This Pathway/Genome Database (PGDB) was generated on 12-Jul-2016 by the PathoLogic [Karp10, Dale10, Caspi14] component of Pathway Tools software version 20.5 and MetaCyc version 20.0.
The PGDB, which integrates the biochemical reaction network and metabolic pathways of the organism with its genome, was improved by limited manual curation.