Immune-Activated B Cells Are Dominant in Prostate Cancer.

Saudi A, Banday V, Zirakzadeh AA, Selinger M, Forsberg J, Holmbom M, Henriksson J, Waldén M, Alamdari F, Aljabery F, Winqvist O, Sherif A

Cancers (Basel) 15 (3) - [2023-02-01; online 2023-02-01]

B cells are multifaceted immune cells responding robustly during immune surveillance against tumor antigens by presentation to T cells and switched immunoglobulin production. However, B cells are unstudied in prostate cancer (PCa). We used flow cytometry to analyze B-cell subpopulations in peripheral blood and lymph nodes from intermediate-high risk PCa patients. B-cell subpopulations were related to clinicopathological factors. B-cell-receptor single-cell sequencing and VDJ analysis identified clonal B-cell expansion in blood and lymph nodes. Pathological staging was pT2 in 16%, pT3a in 48%, and pT3b in 36%. Lymph node metastases occurred in 5/25 patients (20%). Compared to healthy donors, the peripheral blood CD19+ B-cell compartment was significantly decreased in PCa patients and dominated by naïve B cells. The nodal B-cell compartment had significantly increased fractions of CD19+ B cells and switched memory B cells. Plasmablasts were observed in tumor-draining sentinel lymph nodes (SNs). VDJ analysis revealed clonal expansion in lymph nodes. Thus, activated B cells are increased in SNs from PCa patients. The increased fraction of switched memory cells and plasmablasts together with the presence of clonally expanded B cells indicate tumor-specific T-cell-dependent responses from B cells, supporting an important role for B cells in the protection against tumors.

Bioinformatics Support for Computational Resources [Service]

Clinical Genomics Umeå [Service]

PubMed 36765877

DOI 10.3390/cancers15030920

Crossref 10.3390/cancers15030920

pmc: PMC9913271
pii: cancers15030920

Publications 9.5.0