Self-antigen recognition by follicular lymphoma B-cell receptors

Blood - Tập 120 - Trang 4182-4190 - 2012
Kacey L. Sachen1, Michael J. Strohman2, Jonathan Singletary1, Ash A. Alizadeh1, Nicole H. Kattah3, Chen Lossos1, Elizabeth D. Mellins2, Shoshana Levy1, Ronald Levy1
1Department of Medicine, Division of Oncology, Stanford University School of Medicine, Stanford, CA
2Department of Pediatrics, Stanford University School of Medicine, Stanford, CA; and
3Department of Medicine, Division of Immunology and Rheumatology, Stanford University, Stanford, CA

Tóm tắt

Abstract Follicular lymphoma is a monoclonal B-cell malignancy with each patient's tumor expressing a unique cell surface immunoglobulin (Ig), or B-cell receptor (BCR), that can potentially recognize antigens and/or transduce signals into the tumor cell. Here we evaluated the reactivity of tumor derived Igs for human tissue antigens. Self-reactivity was observed in 26% of tumor Igs (25 of 98). For one follicular lymphoma patient, the recognized self-antigen was identified as myoferlin. This patient's tumor cells bound recombinant myoferlin in proportion to their level of BCR expression, and the binding to myoferlin was preserved despite ongoing somatic hypermutation of Ig variable regions. Furthermore, BCR-mediated signaling was induced after culture of tumor cells with myoferlin. These results suggest that antigen stimulation may provide survival signals to tumor cells and that there is a selective pressure to preserve antigen recognition as the tumor evolves.

Tài liệu tham khảo

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