ArticleRadiotherapy and oncology : journal of the European Society for Therapeutic Radiology and Oncology2024
The radiopharmaceutical radium-223 has immunomodulatory effects in patients and facilitates anti-programmed death receptor-1 therapy in murine models of bone metastatic prostate cancer.
Article in Radiotherapy and oncology : journal of the European Society for Therapeutic Radiology and Oncology, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers, 1 of them a synthesis that pooled it.
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7 citing papers in PubMed, 1 synthesis or guideline pooled it, 6 citations in OpenAlex.
- Combinations of treatments based on radiotherapy or radionuclides to enhance immunotherapy efficacy in advanced prostate cancer: a systematic review.Journal of cancer research and clinical oncology · 2025Pooled it
- Tumor‑immune spatiotemporal co‑evolution: A new paradigm for understanding and overcoming therapy resistance in metastatic castration‑resistant prostate cancer (Review).International journal of molecular medicine · 2026Review
- Activation of tumor-specific CD8+ T cells prior to radiopharmaceutical therapy improves antitumor response.Journal for immunotherapy of cancer · 2026Article
- T cell fate regulation in EBV‑associated nasopharyngeal carcinoma (Review).Oncology reports · 2026Review
- T Cell Exhaustion in Cancer Immunotherapy: Heterogeneity, Mechanisms, and Therapeutic Opportunities.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2026Review
- Decoding the Role of MDSCs in Bone Metastasis: Multicellular Interactions and Clinical Implications.Pharmaceuticals (Basel, Switzerland) · 2026Review
- Preclinical Evaluation of Radium-223 and Immune Checkpoint Inhibitors Using an Immune-Competent Model of Prostate Cancer Bone Metastases.Precision oncology · 2026Article
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Authors and funding
11 authors at 2 institutions in 1 country.
Funding
Abstract
BACKGROUND & PURPOSE: Radium-223 (Ra223) improves survival in metastatic prostate cancer (mPC), but its impact on systemic immunity is unclear, and biomarkers of response are lacking. We examined markers of immunomodulatory activity during standard clinical Ra223 and studied the impact of Ra223 on response to immune checkpoint inhibition (ICI) in preclinical models. MATERIALS &
methodsWe conducted a single-arm biomarker study of Ra223 in 22 bone mPC patients. We measured circulating immune cell subsets and a panel of cytokines before and during Ra223 therapy and correlated them with overall survival (OS). Using two murine mPC models-orthotopic PtenSmad4-null and TRAMP-C1 grafts in syngeneic immunocompetent mice-we tested the efficacy of combining Ra223 with ICI.
resultsAbove-median level of IL-6 at baseline was associated with a median OS of 358 versus 947 days for below levels; p = 0.044, from the log-rank test. Baseline PlGF and PSA inversely correlated with OS (p = 0.018 and p = 0.037, respectively, from the Cox model). Ra223 treatment was associated with a mild decrease in some peripheral immune cell populations and a shift in the proportion of MDSCs from granulocytic to myeloid. In mice, Ra223 increased the proliferation of CD8
conclusionThe inflammatory cytokine IL-6 and the angiogenic biomarker PlGF at baseline were promising outcome biomarkers after standard Ra223 treatment. In mouse models, Ra223 increased intratumoral CD8
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