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    The B-cell system plays an important role in the melanoma immune response; however, consensus has yet to be reached in many facets. Here, we comprehensively review human studies only, due to fundamental differences in the humoral response with animal models. Tumour-infiltrating B-cells are associated with contradictory prognostic values, reflecting a lack of agreement between studies on cell subset classification and differences in the markers used, particularly the common use of a single marker not differentiating multiple subsets. Tertiary lymphoid structures (TLS) organise T-cells and B-cells within tumours to generate a local anti-tumour response and TLS presence associates with improved survival in response to immune checkpoint blockade, in late-stage disease. Autoantibody production is increased in melanoma patients and has been proposed as biomarkers for diagnosis, prognosis and treatment/toxicity response; however, no consistent targets are yet identified. The function of antibodies in an anti-tumour response is determined by its isotype and subclass; IgG4 is immune-suppressive and robustly correlate with poor patient survival in melanoma. We conclude that the current B-cell literature needs careful interpretation based on the methods used and that we need a consensus of markers to define B-cells and associated lymphoid organs. Furthermore, future studies need to not only examine antibody targets, but also isotypes when considering functional roles. © 2022 The Authors. Pigment Cell & Melanoma Research published by John Wiley & Sons Ltd.

    Citation

    Chloe B Rodgers, Colette J Mustard, Ryan T McLean, Sharon Hutchison, Antonia L Pritchard. A B-cell or a key player? The different roles of B-cells and antibodies in melanoma. Pigment cell & melanoma research. 2022 May;35(3):303-319

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    PMID: 35218154

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