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Abstract Title:

The anti-inflammatory effects of asiatic acid in lipopolysaccharide-stimulated human corneal epithelial cells.

Abstract Source:

Int J Ophthalmol. 2017 ;10(2):179-185. Epub 2017 Feb 18. PMID: 28251074

Abstract Author(s):

Hao Chen, Xiao-Min Hua, Bai-Chen Ze, Bin Wang, Li Wei

Article Affiliation:

Hao Chen

Abstract:

AIM: To investigate the anti-inflammatory effects of asiatic acid (AA) on lipopolysaccharide (LPS)-induced inflammatory response in human corneal epithelial cells (HCECs).

METHODS: Cell viability was measured using a cell counting kit-8 (CCK-8) assay. Quantitative real-time polymerase chain reaction (qRT-PCR) was used to determine the mRNA expression of interleukin-8 (IL-8), interleukin-6 (IL-6), interleukin-1β (IL-1β), tumor necrosis factor-alpha (TNF-α), and transforming growth factor-β (TGF-β) in HCECs. Intracellular reactive oxygen species (ROS) was measured using the ROS assay kit. Glutathione (GSH) concentration was measured using the total GSH assay kit. Akt1 and Akt phosphorylation (p-Akt1)levels were measured by Western blotting and immunofluorescence.

RESULTS: AA induced toxicity at high concentrations and significantly stimulated the proliferation of HCECs at concentrations of 20µmol/L for 1h. LPS at concentrations of 300 ng/mL for 1h significantly stimulated the mRNA expression of IL-8, IL-6, IL-1β, TNF-α, and TGF-β in HCECs, while the stimulation effects were significantly inhibited by AA (20 µmol/L). In addition, AA was found to decrease the content of ROS, increaseGSH generation, and also inhibit LPS-induced p-Akt in HCECs.

CONCLUSION: AA decreases the generation of inflammatory factors IL-8, IL-6, IL-1β, TNF-α, and TGF-β in LPS-stimulated HCECs. AA significantly inhibites the intracellular concentrations of ROS and increases GSH generation. AA also inhibites LPS-induced p-Akt in HCECs. These findings reveal that AA has anti-inflammation effects in LPS-stimulated HCECs.

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