ArticleEuropean journal of nuclear medicine and molecular imaging2026
Whole-body TSPO-PET reveals stage-dependent disruption of systemic immune organ interactions in glioblastoma.
Article in European journal of nuclear medicine and molecular imaging, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
purposeStrong expression of the 18 kDa translocator protein (TSPO) is observed in glioma and tumor-associated myeloid cells within the tumor microenvironment. However, TSPO expression also extends beyond the tumor and may reflect systemic immune regulation. We therefore assessed inter-organ associations of TSPO expression in mice at different stages of glioblastoma using whole-body TSPO-PET imaging.
methodsWhole-body TSPO-PET images were acquired using [
resultsLate-stage glioblastoma mice showed increased TSPO expression in the tumor region, but no significant TSPO alterations in other organs. In contrast, organ-organ interactions, including lungs and non-tumor brain regions, were disrupted in early- and late-stage glioblastoma mice compared to sham mice. Late-stage glioblastoma mice had high correlation abnormality scores across several organ systems, as was also observed in data obtained with the second TSPO tracer. Longitudinal TSPO organ-organ interactions, but not TSPO-PET signals in single organs, were associated with tumor stage and survival.
conclusionsGlioblastoma induces stage-dependent systemic TSPO alterations and organ-organ interaction changes, suggesting that whole-body TSPO-PET network analysis may track tumor-associated immune dynamics.
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