Oral Administration of Oat Beta-Glucan Preparations of Different Molecular Weight Results in Regulation of Genes Connected with Immune Response in Peripheral Blood of Rats with LPS-Induced Enteritis
Katarzyna Błaszczyk , Małgorzata Gajewska , Jacek Wilczak , Dariusz Kamola , Alicja Majewska , Joanna Harasym , Joanna Gromadzka-Ostrowska
AbstractPurpose Beta-glucans are biologically active polysaccharides having antioxidant, immunomodulatory, and antiinflammatory properties. This study investigated the transcriptomic profile in peripheral blood of rats with LPS-induced enteritis, which were fed a diet supplemented with high- (G1) and low- (G2) molecular-weight oat beta-glucans. Methods Two-color rat gene expression microarrays were applied and the analysis was performed using a common reference design to provide easy means of comparing samples from various experimental conditions against one another. Common reference sample was labeled with cyanine 3 (Cy3) and investigated samples from each experimental group: C-G0 (control group fed semi-synthetic diet), LPS-G0 (LPS-challenged group fed semi-synthetic diet), LPS-G1 (LPS-challenged group fed G1 beta-glucan enriched diet), and LPS-G2 (LPS-challenged group fed G2 beta-glucan enriched diet) were labeled with cyanine 5 (Cy5). Each microarray was performed in quadruplicate. Statistical analysis was performed using one-way ANOVA and Tukey’s HSD post-hoc test (p<0.05). A multiple testing correction was performed using Benjamini and Hochberg False Discovery Rate<5%. A quantitative real-time RT-PCR was performed to verify the expression of chosen transcripts. Results The microarray analyses revealed differentially expressed transcripts between: the LPS-G0 and the control groups: C-G0 (138 genes), the LPS-G1 and LPS-G0 groups (533 genes), and the LPS-G2 and LPS-G0 groups (97 genes). Several differentially expressed genes in the beta-glucan-supplemented groups encoded proteins belonging to TLR and NLR signaling pathways, as well as prostaglandin synthesis and regulation pathways. Both beta-glucans up-regulated the expression of Atg10, which belongs to the family of autophagy-related genes, suggesting a possible link between autophagy induction and beta-glucan supplementation. Conclusion The changes in gene expression observed in the peripheral blood indicate that oat beta-glucans exerted a protective effect in rats with an induced inflammatory state caused by LPS challenge. The greater number of differentially expressed genes was observed in group supplemented with G1 beta-glucan, pointing at the differences in the mode of action of highand low-molecular-weight beta-glucans in the organism.
|Journal series||European Journal of Nutrition, ISSN 1436-6207, e-ISSN 1436-6215, (N/A 100 pkt)|
|Publication size in sheets||0.7|
|Keywords in English||Autophagy, Beta-glucans, Enteritis, Immunomodulation, Transcriptomic Profile|
|Publication indicators||= 1; : 2018 = 1.195; : 2018 = 4.449 (2) - 2018=4.076 (5)|
|Citation count*||3 (2019-12-05)|
|Uwagi:||This project was funded by a grant no.: N N312 427440 from the National Science Centre, Poland. We would like to thank Futurum Ltd., Częstochowa, Poland, for support in beta-glucan manufacturing. We also thank KONTEKST Translations company for their language editing service.|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.