Immunobiotics Beneficially Modulate TLR4 Signaling Triggered by Lipopolysaccharide and Reduce Hepatic Steatosis In Vitro.
Paulraj KanmaniAbuZar AnsariJulio VillenaHojun KimPublished in: Journal of immunology research (2019)
Hepatic inflammation and injury may result from the translocation of pathological bacteria and their proinflammatory mediators. Probiotics attenuate hepatic diseases related to inflammation by exhibiting immunoregulatory effects. Therefore, this study was conducted to evaluate lipid reduction and immunoregulatory potentials of probiotic bacteria in vitro. HepG2 cells treated with total cellular fluid (TCF) of LABs reduced lipid accumulation. Moreover, cells responded to lipopolysaccharide (LPS) by producing higher levels of IL-6, IL-8, MCP-1, and TNF-α. TCF of LABs treatment showed remarkably diminished levels of the expression of these cytokines via modulation of the expression of TLR-negative regulators, as well as MAPK and NF-κB pathways. Moreover, heat-killed LABs were able to diminish TGF-β, IL-1β, and IL-6 and to increase IL-10 and TLR4 levels in THP-1 cells. LABs also decreased the protein level of TNF-α. These results demonstrated that immunobiotics exhibit potent immunoregulatory activity and may be used as effective therapeutic agents to alleviate inflammatory response.
Keyphrases
- inflammatory response
- lps induced
- toll like receptor
- oxidative stress
- induced apoptosis
- lipopolysaccharide induced
- poor prognosis
- immune response
- rheumatoid arthritis
- nuclear factor
- cell cycle arrest
- binding protein
- pi k akt
- fatty acid
- cell death
- amino acid
- anti inflammatory
- transcription factor
- long non coding rna
- epithelial mesenchymal transition
- drug induced