The tumor microenvironment (TME) plays a critical role in cancer progression and therapeutic response, particularly in glioblastoma and colorectal cancer. Kloosterman et al. demonstrated that macrophages facilitate the transfer of myelin-derived lipids to glioblastoma cells, supporting their metabolic demands through an LXR/Abca1-dependent mechanism, thus highlighting a unique immune-metabolic interplay in the TME (ref: Kloosterman doi.org/10.1016/j.cell.2024.07.030/). In advanced melanoma, Cillo et al. found that the combination of anti-LAG-3 and anti-PD-1 therapies enhances CD8+ T cell functionality, suggesting that immune checkpoint blockade can reshape T cell responses in the TME (ref: Cillo doi.org/10.1016/j.cell.2024.06.036/). Tan et al. introduced metal-ion-chelating L-phenylalanine nanostructures that, when combined with short-term starvation, remodel the immunosuppressive microenvironment of breast tumors, enhancing the efficacy of immune checkpoint inhibitors (ref: Tan doi.org/10.1038/s41565-024-01758-3/). Furthermore, Jackson et al. identified Meteorin-like cytokine as a contributor to CD8+ T cell hypofunction in the TME, linking metabolic insufficiency to immune evasion (ref: Jackson doi.org/10.1016/j.immuni.2024.07.003/). Integrative single-cell analysis by Chu et al. revealed distinct immune evasion mechanisms in colorectal cancer, emphasizing the heterogeneity of the TME and its impact on patient stratification (ref: Chu doi.org/10.1038/s43018-024-00807-z/). Soll et al. highlighted the role of sodium chloride in enhancing T cell metabolic fitness and cytotoxicity, suggesting ionic signals as potential modulators of antitumor immunity (ref: Soll doi.org/10.1038/s41590-024-01918-6/). In HER2-positive gastric cancer, Chen et al. found that PD-L1 expression correlates with immune microenvironment variations, influencing treatment outcomes (ref: Chen doi.org/10.1186/s12943-024-02085-w/). Zhou et al. proposed targeting circ-0034880-enriched tumor extracellular vesicles to impede pre-metastatic niche formation, indicating a novel therapeutic strategy against metastasis (ref: Zhou doi.org/10.1186/s12943-024-02086-9/). Lastly, Qiu et al. demonstrated that breast cancer cells adapt to glutamine blockade through metabolic reprogramming, underscoring the importance of metabolic pathways in the TME (ref: Qiu doi.org/10.1038/s42255-024-01104-w/).