Microglial fructose metabolism is essential for glioblastoma growth

Billingham LK, DeLay SL, Eshac Y, Chia TY, Tripathi S, Olson IE, Zilinger K, Subbiah J, Wang Z, Sadagopan NS, Najem H, Cognet G, Katz JL, Du R, Nandoliya KR, Boland LK, Vázquez-Cervantes GI, Wang S, Wan H, Lipshutz AB, Murphy AR, Duffy J, Balyasnikova IV, Zhang P, Heiland DH, Ahmed AU, Lee-Chang C, Heimberger AB, Perry JS, Muir A, Chandel NS, Miska J (2026)

Publication Type: Journal article

Publication year: 2026

Journal

Proceedings of the National Academy of Sciences of the United States of America National Academy of Sciences

Book Volume: 123

Article Number: e2521256123

Journal Issue: 12

DOI: 10.1073/pnas.2521256123

Abstract

Glioblastoma (GBM) remains one of the most aggressive and treatment-resistant brain tumors in adults. Its immune microenvironment is dominated by tumor-associated macrophages, including both infiltrating monocytes and brain-resident microglia. While metabolic rewiring of infiltrating myeloid cells has been shown to support tumor progression, the role of microglial metabolism in GBM remains incompletely understood. Here, we demonstrate that microglia uniquely express the fructose transporter GLUT5 and are the only immune cells in the GBM microenvironment capable of metabolizing fructose. Using murine orthotopic glioma and Replication-Competent Avian sarcoma leuko virus Splice acceptor (RCAS)-derived tumor models, we show that global deletion of GLUT5 confers profound resistance to tumor growth. This effect is driven by loss of fructose metabolism in microglia and occurs independently of contributions from peripheral immune compartments. In GLUT5-deficient mice, tumors exhibit increased infiltration and activation of both innate and adaptive immunity, including enhanced antigen presentation, clonal expansion of CD8+ T cells, and increased cytokine production. Depletion of B-cells or CD8+ T cells abrogated survival phenotypes in knockout mice, demonstrating that GLUT5 suppresses adaptive immunity. These findings identify microglial fructose metabolism as a critical regulator of immune suppression in GBM and suggest that targeting this pathway may improve immunotherapeutic responses.

Authors with CRIS profile

Dieter Henrik Heiland

Involved external institutions

Northwestern University US United States (USA) (US) Weill Cornell Medicine US United States (USA) (US) Universitätsklinikum Freiburg DE Germany (DE) Memorial Sloan Kettering Cancer Center US United States (USA) (US) University of Chicago US United States (USA) (US)

How to cite

APA:

Billingham, L.K., DeLay, S.L., Eshac, Y., Chia, T.Y., Tripathi, S., Olson, I.E.,... Miska, J. (2026). Microglial fructose metabolism is essential for glioblastoma growth. Proceedings of the National Academy of Sciences of the United States of America, 123(12). https://doi.org/10.1073/pnas.2521256123

MLA:

Billingham, Leah K., et al. "Microglial fructose metabolism is essential for glioblastoma growth." Proceedings of the National Academy of Sciences of the United States of America 123.12 (2026).

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