CXCR3 (C-X-C Motif Chemokine Receptor 3)

Our finding that the antitumor activity of locally induced PF4 contrasts with its reported protumor effects when expressed systemically clarifies the context-dependent duality of PF4 in cancer. These results position TLR8 agonists as promising candidates for combination immunotherapy.

Combining CTX with the next generation MERTK-selective inhibitor UNC2371 (MRX-2843) drives complete remissions in both models, but durable long-term responses occurred selectively in the basal-like subtype model. Suppressive myeloid programing limits effective adaptive immune engagement in TNBC usually resulting in ICB treatment resistance and tumor recurrence. This study identifies a therapeutically actionable myeloid interferon checkpoint in which MERTK inhibition stabilizes CXCL9⁺ monocyte-macrophage programming to promote CD4⁺ T cell dependent immune memory and durable tumor control in basal-like TNBC.

Furthermore, exercise-induced butyrate accumulation in Kupffer cells inhibits histone deacetylase 3 activity, promoting CXCL9 expression. These findings suggest that PEx may serve as a non-invasive strategy to reduce recurrence and provide potential targets for exercise-mimetic therapies.

Notably, the CXCL10-driven T cell response is associated with simultaneous upregulation of both activation and exhaustion markers, indicating a robust but transient effector state within the tumor microenvironment. Collectively, these findings uncover a neuro-immune axis that reverses immune escape in p53-deficient HNSCC and suggest novel therapeutic strategies targeting adrenergic signaling to convert immune "cold" tumors into "hot" ones more amenable to immunotherapy.

Furthermore, NK cell functional heterogeneity was driven by the transition from HD/Adenomas to CRC. These immunophenotypic shifts collectively highlight the potential of CyTOF as a diagnostic platform for early CRC detection and monitoring through peripheral blood analysis.

In contrast, M1-like macrophages could produce CXCL9 and CXCL10, activating effector CD8+ T cells, thereby enhancing anti-tumor immunity. Finally, the promising therapeutic potential of targeting specific chemokine signaling axes, such as CCL2/CCR2 and CXCL10/CXCR3, was discussed as a strategy to improve the efficacy of cancer immunotherapy.

Our findings highlight RRBP1 as an inflammation-immune-associated gene that inhibits tumor progression and improves immunotherapy efficacy by regulating the CXCL10-CXCR3 axis in the tumor microenvironment.

These findings provide valuable insights regarding T-cell kinetics and biomarkers in atezolizumab therapy and may offer promising directions for future research. Trial Registration: UMIN Clinical Trials Registry: UMIN000033133 and UMIN000035567; ClinicalTrials.gov: NCT03645330.

Spatial and coculture analyses of these tumors demonstrated that the CD8+ T cell-associated chemokine CXCL11 drove estrogen-independent tumor growth. These findings identify an immune-mediated mechanism of endocrine resistance in breast cancer and identify CXCL11 as a potential biomarker and therapeutic vulnerability.

Leveraging these findings, we identified a CXCL10-mediated dormancy signature that predicts improved overall survival in TNBC patients. Our findings have identified a new mechanism modulating breast cancer dormancy with two important clinical implications: the CXCL10/CXCR3 axis as a potential therapeutic target for improving survival of patients with TNBC, and the CXCL10-dependent dormancy signature as a tool for identifying these patients.

Therapeutically, agents targeting chemokine pathways, most notably the CCR4 monoclonal antibody Mogamulizumab, have demonstrated clinical efficacy, while emerging inhibitors of CCR6, CCR5, and CXCR4 offer promising avenues for intervention. We further highlight how recent single-cell and other high-dimensional omics studies refine cell-type-specific chemokine sources and receptor expression, enabling more precise mapping of chemokine-driven intercellular communication programs in CTCL TME remodeling and better prioritization of therapeutic targets and biomarkers.

SDHA deficiency leads to succinate accumulation, which promotes M2 macrophage polarization through the GPR91/STAT3 pathway, thereby facilitating HCC progression. Based on these findings, serum succinate could be a promising diagnostic biomarker for HCC.