The Warburg effect in mycobacterial granulomas is dependent on the recruitment and activation of macrophages by interferon-gamma

• Type: Article in International Scientific Journal
• Date: 2015

Authors

Appelberg, R (Author) Other; Moreira, D (Author) Other; Barreira Silva, P (Author) Other; Borges, M (Author) FFUP; Silva, L (Author) Other; Ricardo Jorge Dinis Oliveira (Author) FMUP; Resende, M (Author) Other; Correia Neves, M (Author) Other; Jordan, MB (Author) Other; Ferreira, NC (Author) Other; Abrunhosa, AJ (Author) Other; Silvestre, R (Author) Other

Journal

Title: Immunology

Vol. 145 No. 2

Pages: 498-507

ISSN: 0019-2805

Publisher: Wiley-Blackwell

Indexing

ISI Web of Knowledge - 35 Citations

Scopus - 37 Citations

Other information

Authenticus ID: P-00G-6ZD

DOI: 10.1111/imm.12464

Abstract (EN): Granulomas are the hallmark of mycobacterial disease. Here, we demonstrate that both the cell recruitment and the increased glucose consumption in granulomatous infiltrates during Mycobacterium avium infection are highly dependent on interferon-gamma (IFN-gamma). Mycobacterium avium-infected mice lacking IFN-gamma signalling failed to developed significant inflammatory infiltrations and lacked the characteristic uptake of the glucose analogue fluorine-18-fluorodeoxyglucose (FDG). To assess the role of macrophages in glucose uptake we infected mice with a selective impairment of IFN-gamma signalling in the macrophage lineage (MIIG mice). Although only a partial reduction of the granulomatous areas was observed in infected MIIG mice, the insensitivity of macrophages to IFN-gamma reduced the accumulation of FDG. In vivo, ex vivo and in vitro assays showed that macrophage activated by IFN-gamma displayed increased rates of glucose uptake and in vitro studies showed also that they had increased lactate production and increased expression of key glycolytic enzymes. Overall, our results show that the activation of macrophages by IFN-gamma is responsible for the Warburg effect observed in organs infected with M. avium.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 10