B7-H3 Immune Checkpoint Protein in Human Cancer

Author(s): Karine Flem-Karlsen, Øystein Fodstad, Caroline E. Nunes-Xavier*

Journal Name: Current Medicinal Chemistry

Volume 27 , Issue 24 , 2020

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B7-H3 belongs to the B7 family of immune checkpoint proteins, which are important regulators of the adaptive immune response and emerging key players in human cancer. B7-H3 is a transmembrane protein expressed on the surface of tumor cells, antigen presenting cells, natural killer cells, tumor endothelial cells, but can also be present in intra- and extracellular vesicles. Additionally, B7-H3 may be present as a circulating soluble isoform in serum and other body fluids. B7-H3 is overexpressed in a variety of tumor types, in correlation with poor prognosis. B7-H3 is a promising new immunotherapy target for anti-cancer immune response, as well as a potential biomarker. Besides its immunoregulatory role, B7-H3 has intrinsic pro-tumorigenic activities related to enhanced cell proliferation, migration, invasion, angiogenesis, metastatic capacity and anti-cancer drug resistance. B7-H3 has also been found to regulate key metabolic enzymes, promoting the high glycolytic capacity of cancer cells. B7-H3 receptors are still not identified, and little is known about the molecular mechanisms underlying B7-H3 functions. Here, we review the current knowledge on the involvement of B7-H3 in human cancer.

Keywords: B7-H3 Immune, regulators, body fluids, isoform, anti-cancer immune response, pro-tumorigenic activities.

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Article Details

Year: 2020
Page: [4062 - 4086]
Pages: 25
DOI: 10.2174/0929867326666190517115515
Price: $65

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