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Lactobacillus delivery of bioactive interleukin-22.
Microbial Cell Factories 2017 August 24
BACKGROUND: Interleukin-22 (IL-22) plays a prominent role in epithelial regeneration and dampening of chronic inflammatory responses by protecting intestinal stem cells from immune-mediated tissue damage. IL-22 has a considerable therapeutic potential in graft-versus-host disease (GVHD), which is a frequent and challenging complication following allogeneic stem cell transplantation. The aim of our study was to engineer Lactobacillus for delivery of IL-22 directly to the intestinal mucosa as a new therapeutic strategy for GVHD.
RESULTS: The secretion and surface anchoring of mouse IL-22 by Lactobacillus paracasei BL23 was demonstrated by Western blot and flow cytometry. Both secreted and anchored mouse IL-22 produced by Lactobacillus was biologically active, as determined by its ability to induce IL-10 secretion in the Colo 205 human colon cancer cell line.
CONCLUSIONS: We have demonstrated the secretion and surface anchoring of bioactive IL-22 by Lactobacillus. Our results suggest that IL-22 expressing lactobacilli may potentially be a useful mucosal therapeutic agent for the treatment of GVHD, provided that chromosomal integration of the IL-22 expression cassettes can be achieved.
RESULTS: The secretion and surface anchoring of mouse IL-22 by Lactobacillus paracasei BL23 was demonstrated by Western blot and flow cytometry. Both secreted and anchored mouse IL-22 produced by Lactobacillus was biologically active, as determined by its ability to induce IL-10 secretion in the Colo 205 human colon cancer cell line.
CONCLUSIONS: We have demonstrated the secretion and surface anchoring of bioactive IL-22 by Lactobacillus. Our results suggest that IL-22 expressing lactobacilli may potentially be a useful mucosal therapeutic agent for the treatment of GVHD, provided that chromosomal integration of the IL-22 expression cassettes can be achieved.
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