Abstract
Purpose
Metastatic bladder cancer (BC) has the highest somatic mutation frequency and recurrence rate of all tumors. However, the cellular and molecular characteristics of BC remain unclear.
Methods
We performed single-cell RNA sequencing (scRNA-seq) on the samples of paracancerous normal tissue (PNT), primary tumor (PT) and lymph node metastasis (LNM). The proportions and gene expression profiles of different cell types in the tumor microenvironment (TME) were investigated.
Results
In total, 50,158 cells were classified into six populations. Malignant cells of PT and LNM exhibited large mutant DNA fragments, while the cell phenotypes and gene expression profiles differed during differentiation. Metastasis was associated with a poorer prognosis than PT. Tumor-associated stromal cells and inhibitory immune cells were the main cell populations in PT and LNM. Cell-cell communication analysis revealed the roles of signaling pathways of inflammatory cancer-associated fibroblast (iCAF) and tumor-associated macrophage (TAM) in exhaustion of T cells. In addition, iCAF may recruit TAM to promote formation of the TME earlier than the differentiation of tumor cells.
Conclusion
This study through scRNA-seq enhanced our understanding of new features about the cellular and molecular similarities and differences of high-grade and metastatic bladder cancer, which might provide potential therapeutic targets in future treatment.
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Data availability
All data generated or analyzed during this study are included in this published article.
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Acknowledgements
We acknowledge the OE Biotech Co. Ltd (Shanghai, China) for providing single-cell RNA sequencing technology. And the support Funding: including the Central Guidance on Local Science and Technology Development Fund of Shanxi Province (No. YDZJSX2021C010); Nature Science Foundation of Shanxi Province (No.202103021224412); Fund Program for the Scientific Activities of Selected Returned Overseas Professionals in Shanxi Province (No.20210005); Shanxi Provincial Basic Applied Research Project (No.20210302124611).
Funding
Nature Science Foundation of Shanxi Province (No.202,103,021,224,412). The Central Guidance on Local Science and Technology Development Fund of Shanxi Province (No.YDZJSX2021C010). Fund Program for the Scientific Activities of Selected Returned Overseas Professionals in Shanxi Province (No.20,210,005). Shanxi Provincial Basic Applied Research Project (No.20,210,302,124,611).
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Material preparation, data collection and analysis were performed by Yue Zheng. The first draft of the manuscript was written by Yue Zheng and Xin Wang. Yue Zheng was the major contributor in designing and writing this manuscript. Xin Wang was responsible for writing the experimental part. Funding acquisition, reviewing and editing were performed by Xiaofeng Yang. All authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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The research involving human samples have been performed in accordance with the Declaration of Helsinki. This study was approved by the Ethics Committee of the First Hospital of Shanxi Medical University (K093). Informed consent was obtained from the patients.
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Zheng, Y., Wang, X., Yang, X. et al. Single-cell RNA sequencing reveals the cellular and molecular characteristics of high-grade and metastatic bladder cancer. Cell Oncol. 46, 1415–1427 (2023). https://doi.org/10.1007/s13402-023-00820-x
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DOI: https://doi.org/10.1007/s13402-023-00820-x