Flow Cytometry Analysis Reveals a Wide Cytologic and Immunophenotypic Spectrum of Peripheral B Lymphocytes in Angioimmunoblastic T-Cell Lymphoma

Hung Lin Liu, Chun-Kai Liao, Shao Wen Weng, Lee Yung Shih, Chih Chi Chou, Huey Ling You, Ming Chung Wang, Wan Ting Huang*

*此作品的通信作者

研究成果: 期刊稿件文章同行評審

2 引文 斯高帕斯(Scopus)

摘要

INTRODUCTION: Angioimmunoblastic T-cell lymphoma (AITL) is an aggressive T-cell lymphoma commonly associated with B-cell dysregulation. Correlations involving B-cell dysregulation and clinicopathological features remain unclear.

METHODS: We prospectively collected blood samples from 11 AITL patients and 17 healthy controls. The percentages of B-cell subpopulations and lymphocytes with IL-21 production were assessed using flow cytometry. Peripheral blood lymphocyte morphology was evaluated microscopically.

RESULTS: Six of 11 (54.5%) patients presented with polyclonal hypergammaglobulinemia. Three of 11 (27.3%) tumor biopsies showed monoclonal immunoglobulin gene rearrangement. The patients exhibited significantly lower levels of naive (p < 0.001) and class-switched (p < 0.001) B cells than controls. The percentages of IgD-CD27- B cells (p = 0.007) and antibody-secreting cells (ASCs) (p = 0.001) were increased. Blood smears revealed atypical lymphocytes and immature plasma cells with morphological diversity. In comparison to normal controls, IL-21 production significantly increased in CD4+ (p < 0.001) and CD8+ (p = 0.020) T cells. B-cell clonality, RHOA G17V mutation, and the presence of sheets of clear cells and immature/mature plasma cells in lymph nodes were significantly associated with percentages of class-switched B cells and ASCs. The patients with circulating EBV DNA had a lower percentage of naive B cells (p = 0.009).

CONCLUSIONS: Our results demonstrated a wide spectrum of peripheral B-cell morphologies and immunophenotypes of peripheral B cells in AITL. These findings correspond to dysregulated B-cell immunity and heterogeneous clinicopathological features.

原文英語
頁(從 - 到)187-198
頁數12
期刊Pathobiology
90
發行號3
DOIs
出版狀態已出版 - 01 06 2023

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© 2022 S. Karger AG, Basel.

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