The Optimization of Faecalibacterium prausnitzii Extracellular Vesicle Concentrations on PPARγ and FIAF Expression in the Caco-2 Cell Culture Model

extracellular (EVs) a novel communication between microbiota the are capable of imposing positive effects on the host. Recently, EV-based treatments have been evaluated in different studies, and using EVs derived from microbiota has been recommended in recent studies as post-vaccination adjuvants. Accordingly, in the present study, the effects of various EV concentrations on the mRNA expression of peroxisome proliferator-activated receptor γ ( PPARγ ) and fasting-induced adipose factor (FIAF) genes were evaluated and optimized in the human epithelial colorectal adenocarcinoma (Caco-2) cell line. Methods: The effects of the extracted EVs from F. prausnitzii on the PPARγ and FIAF gene expression were investigated in the Caco-2 cell line via cell culture and quantitative real-time PCR. The obtained outcomes were then compared with those of our previous study (concentrations of 50 and 100 µg/ml). Results: It was shown that F. prausnitzii EVs (150 µg/ml) significantly increased PPARγ and FIAF gene expression in the Caco-2 cell line, relative to previous studies conducted by our team. Conclusion: Considering the positive impact of F. Prausnitzii EVs on the studied genes’ expression in the present study, the EVs of the bacterium will be proposed as new post-vaccination adjuvants in people suffering from intestinal barrier disorders such as inflammatory bowel disease patients. However, more studies should be performed in this respect.