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The qRT-PCR analysis of L. casei and its EVs regarding TLR9 gene expression. A) The cells were serum-deprived and treated with L. casei (MOI ∼ 100:1) or PBS overnight. B) Under similar conditions, the other group of cells was treated with L. casei-derived EVs (100 and 150 μg/mL) or sucrose overnight. *P < 0.05 was statistically significant
