Effects of lactic acid bacteria on inflammatory cytokines production by Arpe-19 cells

M.A. DIAZ; M. GRIET; A. DE MORENO DE LEBLANC; S.N. GONZALEZ; A.V. RODRIGUEZ

Congreso; 52 th Annual Meeting Argentine Society for Biochemistry and Molecular Biology L I I Reunión Anual Sociedad Argentina de Investigación en Bioquímica y Biología Molecular; 2016

SAIB

The anti-inflammatory capacity of probiotic lactic acid bacteria was extensively studied as therapy for inflammatory bowel diseases, but only two studies have been performed in ocular inflammatory disorders. The aim of this work was t oinvestigate the capacity of 4 strains of Lactobacillus plantarum (CRL 1081, CRL759, CRL 725, CRL 92) to modulate cytokines production of LPS-challenged ARPE-19 cells (human retinal pigment epithelial cell line). First, bacteria were grown in MRS medium, showing that exponential growth phase was the optimal for co-culture with cells. Arpe-19 cells were co-incubated with bacterial strains at 10 and 20 MOI in DMEM medium for 6 hours at 37ºC. Then, the cells were stimulated with different LPS concentration (10,50 and 100 µg/ml) for 24 hours. IL-6, IL-8, IL-1β, TNF-α,IL-10 and IL-12p70 were detected in culture supernatants using flow cytometric bead array technique. ARPE-19 cells treated with 10µg/ml LPS produced IL-6(141.4 pg/ml) and IL-8 (335 pg/ml). Two strains exerted an anti-inflammatory effect: L. plantarum CRL 725 at 20MOI reduced the production of IL-6 and IL-8 by 25% and L. plantarum CRL 759 at 10 MOI totally reverted the secretion of both cytokines induced by LPS in ARPE-19 cells. No IL-1β,IL-10, TNF-α and IL-12p70 secretion was detected.Experimental assays to determine the mechanisms responsible for this effect are under development.