ArticleBritish journal of cancer2024
Temporal dynamics of immune cell patterns in bladder cancer patients receiving Bacillus Calmette-Guérin therapy.
Article in British journal of cancer, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed.
- Overcoming barriers to bladder preservation: Emerging intravesical therapies for high-risk non-muscle-invasive bladder cancer.Chinese journal of cancer research = Chung-kuo yen cheng yen chiu · 2026Article
- MAIT cells promote cancer progression and regulatory T cell accumulation in bladder tumor microenvironment.Journal for immunotherapy of cancer · 2025Article
- Tumor-treating fields in cancer therapy: advances of cellular and molecular mechanisms.Clinical & translational oncology : official publication of the Federation of Spanish Oncology Societies and of the National Cancer Institute of Mexico · 2025Review
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Authors and funding
17 authors.
Funding
Abstract
backgroundBacillus Calmette-Guérin (BCG) is capable of enhancing the infiltration of immune cells into the tumour. However the temporal dynamics of immune cell patterns in patients receiving BCG instillation remains unclear.
methodsNinety-six patients who underwent intravesical BCG therapy, comprising 46 responders and 50 non-responders, were retrospectively enroled to explore the evolving immune landscape. This study involved a detailed examination of sequential samples collected before, during, and after BCG treatment to assess BCG's influence on the immune microenvironment, employing techniques such as immunohistochemistry, fluorescent multiplex immunohistochemistry, and mass spectrometry techniques.
resultsOur study found that initial BCG instillation leads to enhanced immune cell infiltration, correlating with treatment efficacy, with responders exhibiting more pronounced increases. Non-responders experience a rise in immune cell infiltration and PD-L1 expression during the first instillation, which returns to baseline after treatment. In non-responders, BCG re-challenge fail to further increase immune cell infiltration into the tumour or improve patient outcomes. Strikingly, proteomics data revealed that GBP1 expression was induced by BCG treatment in non-responders.
conclusionsOur findings demonstrated the induction of tumour PD-L1 expression by BCG in non-responders, and therefore provide insights for the combination of BCG and anti-PD1/anti-PD-L1 therapy.
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