Torretta, S., Scagliola, A., Ricci, L., Mainini, F., Di Marco, S., Cuccovillo, I., Kajaste-Rudnitski, A., Sumpton, D., Ryan, K. M. and Cardaci, S. (2020) D-mannose suppresses macrophage IL-1β production. Nature Communications, 11, 6343. (doi: 10.1038/s41467-020-20164-6) (PMID:33311467) (PMCID:PMC7733482)
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Abstract
D-mannose is a monosaccharide approximately a hundred times less abundant than glucose in human blood. Previous studies demonstrated that supraphysiological levels of D-mannose inhibit tumour growth and stimulate regulatory T cell differentiation. It is not known whether D-mannose metabolism affects the function of non-proliferative cells, such as inflammatory macrophages. Here, we show that D-mannose suppresses LPS-induced macrophage activation by impairing IL-1β production. In vivo, mannose administration improves survival in a mouse model of LPS-induced endotoxemia as well as decreases progression in a mouse model of DSS-induced colitis. Phosphomannose isomerase controls response of LPS-activated macrophages to D-mannose, which impairs glucose metabolism by raising intracellular mannose-6-phosphate levels. Such alterations result in the suppression of succinate-mediated HIF-1α activation, imposing a consequent reduction of LPS-induced Il1b expression. Disclosing an unrecognized metabolic hijack of macrophage activation, our study points towards safe D-mannose utilization as an effective intervention against inflammatory conditions.
Item Type: | Articles |
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Additional Information: | The research leading to these results has received funding from AIRC under Start-Up 2017—ID. 20464 project—P.I. S.C. and by Bando della Ricerca Finalizzata 2018 GR-2018-12365954 to S.C. K.M.R. is supported by Cancer Research UK (A22903 and A17196). |
Status: | Published |
Refereed: | Yes |
Glasgow Author(s) Enlighten ID: | Sumpton, Mr David and Ryan, Professor Kevin and Cardaci, Dr Simone |
Authors: | Torretta, S., Scagliola, A., Ricci, L., Mainini, F., Di Marco, S., Cuccovillo, I., Kajaste-Rudnitski, A., Sumpton, D., Ryan, K. M., and Cardaci, S. |
College/School: | College of Medical Veterinary and Life Sciences > School of Cancer Sciences |
Journal Name: | Nature Communications |
Publisher: | Nature Research |
ISSN: | 2041-1723 |
ISSN (Online): | 2041-1723 |
Copyright Holders: | Copyright © 2020 The Authors |
First Published: | First published in Nature Communications 11: 6343 |
Publisher Policy: | Reproduced under a Creative Commons License |
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