tetano
Editor, Senior Moderator
Sci Rep. 2014 Apr 24;4:4777. doi: 10.1038/srep04777.
Stimulation with the Aureobasidium pullulans-produced β-glucan effectively induces interferon stimulated genes in macrophage-like cell lines.
Muramatsu D1, Kawata K2, Aoki S1, Uchiyama H3, Okabe M3, Miyazaki T4, Kida H5, Iwai A2.
Author information
Abstract
A β-(1,3),(1,6)-D-glucan produced by A. pullulans (AP-PG) is known to be an immune stimulating agent. In this study, we demonstrate that the stimulation with AP-PG effectively induces the interferon (IFN) stimulated genes (ISGs) in macrophage-like cell lines. The ISGs, Mx1, ISG15, and viperin mRNAs were significantly increased in RAW264.7 cells after stimulation with AP-PG. The stimulation with AP-PG transiently induced IFN-β mRNA. However, the expression of viperin mRNA was also increased after stimulation with AP-PG even when new protein synthesis was completely blocked by treatment with cycloheximide. Further, in IFN-α receptor knockdown RAW264.7 cells, AP-PG stimulation more effectively induced viperin mRNA compared with that of IFN-α stimulation. The phosphorylation of Ser 727 in STAT1 involved in the enhancement of STAT1 activation was immediately increased after stimulation with AP-PG. In addition, viperin mRNA expression induced after stimulation with IFN-α was significantly increased by combined stimulation with AP-PG. These results suggest that stimulation with AP-PG effectively induces the ISGs through the induction of IFN and the enhancement of STAT1-mediated transcriptional activation.
PMID:
24759061
[PubMed - in process]
http://www.ncbi.nlm.nih.gov/pubmed/24759061
Stimulation with the Aureobasidium pullulans-produced β-glucan effectively induces interferon stimulated genes in macrophage-like cell lines.
Muramatsu D1, Kawata K2, Aoki S1, Uchiyama H3, Okabe M3, Miyazaki T4, Kida H5, Iwai A2.
Author information
Abstract
A β-(1,3),(1,6)-D-glucan produced by A. pullulans (AP-PG) is known to be an immune stimulating agent. In this study, we demonstrate that the stimulation with AP-PG effectively induces the interferon (IFN) stimulated genes (ISGs) in macrophage-like cell lines. The ISGs, Mx1, ISG15, and viperin mRNAs were significantly increased in RAW264.7 cells after stimulation with AP-PG. The stimulation with AP-PG transiently induced IFN-β mRNA. However, the expression of viperin mRNA was also increased after stimulation with AP-PG even when new protein synthesis was completely blocked by treatment with cycloheximide. Further, in IFN-α receptor knockdown RAW264.7 cells, AP-PG stimulation more effectively induced viperin mRNA compared with that of IFN-α stimulation. The phosphorylation of Ser 727 in STAT1 involved in the enhancement of STAT1 activation was immediately increased after stimulation with AP-PG. In addition, viperin mRNA expression induced after stimulation with IFN-α was significantly increased by combined stimulation with AP-PG. These results suggest that stimulation with AP-PG effectively induces the ISGs through the induction of IFN and the enhancement of STAT1-mediated transcriptional activation.
PMID:
24759061
[PubMed - in process]
http://www.ncbi.nlm.nih.gov/pubmed/24759061