A novel
Lactobacillus rhamnosus KBL2290 strain exhibits various activities such as improving intestinal
flora, anti-inflammatory, and strengthening intestinal tight junctions. The strain may increase intestinal
flora of
Akkermansia genus,
Lactobacillus genus, Ruminococcus
genus or
Prevotella genus, suppress an expression of
interleukin 1-beta (IL-1B),
interleukin 2 (IL-2),
interleukin 4 (IL-4), interleukin 12p40 (IL-12p40), interleukin 13 (IL-13), or interleukin 17A (IL-17A), suppresses an expression of
chemokine ligand 2 (CCL2) or
chemokine ligand 1 (CXCL1), suppress an expression of
cyclooxygenase 2 (Cox-2) or
nitric oxide synthase (iNOS), promote an expression of interleukin 10 (IL-10) or
transforming growth factor-β (TGF-β), and increase an expression of Zo-1 or
Occludin. A pharmaceutical composition including the strain may prevent or treat
inflammatory bowel disease.