Breaching B cell tolerance in the tumor microenvironment.

Cancer Cell

Deeley Research Centre, BC Cancer, Victoria, BC V8R 6V5, Canada; Department of Medical Genetics, University of British Columbia, Vancouver, BC V6T 1Z3, Canada; Department of Biochemistry and Microbiology, University of Victoria, Victoria, BC V8P 3E6, Canada. Electronic address:

Published: April 2022

The immune system employs complex tolerance mechanisms in order to avoid harmful autoimmunity, yet autoantibodies are frequently observed in cancer. In a paper in Cell, Mazor et al. report that autoantibodies produced by tumor-infiltrating B cells in human ovarian cancer frequently recognize the self-protein matrix metalloproteinase 14 (MMP14) through two distinct mechanisms of tolerance disruption.

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http://dx.doi.org/10.1016/j.ccell.2022.03.011DOI Listing

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