Abstract
The current lack of a comprehensive understanding of brain metastasis mechanisms presents a significant gap in cancer research. This review outlines the role that Schwann cells (SCs) have in this process. SCs are already known for their role in myelination and nerve repair within the peripheral nervous system (PNS), but there is less information on their function in facilitating the transport and activation of neoplastic cells to aid in the invasion of the blood–brain barrier and brain. Detailed insights into SCs’ interactions with various cancers, including lung, breast, melanoma, colon, kidney, and pancreatic cancers, reveal how these cells are coerced into repair-like phenotypes to accelerate cancer spread and modulate immune responses. By outlining SCs’ involvement in perineural invasion and BBB modification, this review highlights their functions in facilitating brain metastasis.
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