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Published in: Journal of Ovarian Research 1/2016

Open Access 01-12-2016 | Research

Prognostic impact of tumour-associated B cells and plasma cells in epithelial ovarian cancer

Authors: Sebastian Lundgren, Jonna Berntsson, Björn Nodin, Patrick Micke, Karin Jirström

Published in: Journal of Ovarian Research | Issue 1/2016

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Abstract

Background

The critical role of the immune system in controlling cancer progression has become evident and immune modulatory therapy is now approved for clinical use. However, while the majority of studies on the inflammatory tumour microenvironment have focused on the cellular immune response, in particular the prognostic and predictive role of various T cell infiltrates, the role of the humoral immune response in this context has long been overlooked. This study aimed to investigate the clinicopathological correlates and prognostic impact of B cell and plasma cell infiltration in epithelial ovarian cancer (EOC).

Methods

Immunohistochemical expression of immunoglobulin kappa C (IGKC), CD20 and CD138 was analysed in tissue microarrays with tumours from 154 incident cases of EOC from two pooled prospective population-based cohorts. Subsets of corresponding benign-appearing fallopian tubes (n = 38) and omental metastases (n = 33) were also analysed. Kaplan-Meier analysis and Cox regression analysis were used to determine the impact of immune-cell specific IGKC, CD20 and CD138 expression on overall survival and ovarian cancer-specific survival.

Results

High IGKC expression correlated significantly with expression of CD20 (p = 0.001) and CD138 (p = 0.035). Expression of IGKC as well as CD138 was significantly higher in primary tumours than in fallopian tubes (p = 0.004 and p = 0.001, respectively). High CD20 and CD138 expression correlated significantly with high tumour grade (p = 0.032 and p = 0.030, respectively). CD20 and IGKC expression was not prognostic but univariable Cox regression analysis revealed high CD138 expression to correlate with a significantly reduced overall survival (HR = 2.20; 95 % CI 1.34–3.55; p–0.001) as well as ovarian cancer-specific survival (HR = 1.95; 95 % CI 1.28–2.98; p = 0.002). The prognostic impact was independent of established clinical parameters (age, grade, clinical stage) as shown in multivariable analysis (HR = 2.28; 95 % CI 1.39–3.75; p = 0.001).

Conclusions

In conclusion, our results demonstrate that plasma cell infiltration in epithelial ovarian cancer has a significant impact on tumour progression and prognosis. The important role of the humoral immune system merits further study and may be harnessed as immune modulatory strategies in cancer therapy.
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Metadata
Title
Prognostic impact of tumour-associated B cells and plasma cells in epithelial ovarian cancer
Authors
Sebastian Lundgren
Jonna Berntsson
Björn Nodin
Patrick Micke
Karin Jirström
Publication date
01-12-2016
Publisher
BioMed Central
Published in
Journal of Ovarian Research / Issue 1/2016
Electronic ISSN: 1757-2215
DOI
https://doi.org/10.1186/s13048-016-0232-0

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