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Interaction Networks Converging on Immunosuppressive Roles of Granzyme B: Special Niches Within the Tumor Microenvironment

Journal

FRONTIERS IN IMMUNOLOGY
Volume 12, Issue -, Pages -

Publisher

FRONTIERS MEDIA SA
DOI: 10.3389/fimmu.2021.670324

Keywords

granzyme B; immunosuppression; tumor microenvironment; suppressor cells; regulation networks

Categories

Funding

  1. National Natural Science Foundation of China [81703643, 81973712]

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Granzyme B, primarily used by CTLs and NK cells against abnormal cells during immunosurveillance, has been established as a prognostic marker in tumor microenvironment. Recent findings have shown immunosuppressive effects of Granzyme B, sparking interest in further characterizing its role in immune responses. Research on the regulatory effects of Granzyme B and its interactions within the tumor microenvironment may provide insight for developing therapeutic strategies and diagnostic tools against cancer.
Granzyme B is a renowned effector molecule primarily utilized by CTLs and NK cells against ill-defined and/or transformed cells during immunosurveillance. The overall expression of granzyme B within tumor microenvironment has been well-established as a prognostic marker indicative of priming immunity for a long time. Until recent years, increasing immunosuppressive effects of granzyme B are unveiled in the setting of different immunological context. The accumulative evidence confounded the roles of granzyme B in immune responses, thereby arousing great interests in characterizing detailed feature of granzyme B-positive niche. In this paper, the granzyme B-related regulatory effects of major suppressor cells as well as the tumor microenvironment that defines such functionalities were longitudinally summarized and discussed. Multiplex networks were built upon the interactions among different transcriptional factors, cytokines, and chemokines that regarded to the initiation and regulation of granzyme B-mediated immunosuppression. The conclusions and prospect may facilitate better interpretations of the clinical significance of granzyme B, guiding the rational development of therapeutic regimen and diagnostic probes for anti-tumor purposes.

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