Single-Cell Profiling Identifies SLC2A5-Mediated Fructose Metabolism as a Vulnerability in Primary CNS Lymphoma.

Area of Science:

• Oncology
• Immunology
• Metabolic Research

Background:

• Primary central nervous system lymphoma (PCNSL) features a distinct tumor microenvironment (TME) with hypoxia and low glucose.
• The impact of the PCNSL TME on cellular metabolism and function is not well understood.

Purpose of the Study:

• To investigate tumor-TME interactions in PCNSL using single-cell multi-omic approaches.
• To identify metabolic vulnerabilities within the PCNSL TME.

Main Methods:

• Single-cell multi-omic analysis of PCNSL.
• In vitro and in vivo functional assays.
• Investigation of SLC2A5 expression and fructose metabolism.

Main Results:

• Glucose deprivation in PCNSL TME enhances SLC2A5-mediated fructose metabolism in tumor cells, impairing T cells.
• Hypoxia induces SLC2A5 in tumor-supportive macrophages via HIF regulation.
• Inhibition of SLC2A5-mediated fructose uptake suppressed lymphoma growth.

Conclusions:

• SLC2A5 and fructose metabolism represent potential metabolic vulnerabilities in PCNSL tumor cells and macrophages.
• Targeting SLC2A5 offers a novel therapeutic strategy for PCNSL by disrupting tumor-TME metabolic interactions.