RT Journal Article T1 A pan-cancer analysis of tumor-infiltrating B cell repertoires A1 Yu, Katharine A1 Ravoor, Akshay A1 Malats, Núria A1 Pineda Sanjuan, Silvia A1 Sirota, Marina A2 Hojjat-Farsangi, Mohammad AB Tumor-infiltrating B cells can play an important role in anti-tumor responses but their presence is not well understood. In this study, we extracted the B cell receptor repertoires from 9522 tumor and adjacent non-tumor samples across 28 tumor types in the Cancer Genome Atlas project and performed diversity and network analysis. We identified differences in diversity and network statistics across tumor types and subtypes and observed a trend towards increased clonality in primary tumors compared to adjacent non-tumor tissues. We also found significant associations between the repertoire features and mutation load, tumor stage, and age. Our V-gene usage analysis identified similar V-gene usage patterns in colorectal and endometrial cancers. Lastly, we evaluated the prognostic value of the repertoire features and identified significant associations with survival in seven tumor types. This study warrants further research into better understanding the role of tumor-infiltrating B cells across a wide range of tumor types. SN 1664-3224 YR 2022 FD 2022-01-05 LK https://hdl.handle.net/20.500.14352/102399 UL https://hdl.handle.net/20.500.14352/102399 LA eng NO Yu, K., Ravoor, A., Malats, N., Pineda, S., & Sirota, M. (2021). A pan-cancer analysis of tumor-infiltrating b cell repertoires. Frontiers in Immunology, 12, 790119–790119. NO The supplementary material for this article can be found online at: https://www.frontiersin.org/articles/10.3389/fimmu.2021.790119/full#supplementary-material NO 2019 AACR-AstraZeneca Immuno-oncology Research Fellowship DS Docta Complutense RD 30 jul 2025