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. 2021 Sep 13;20:117. doi: 10.1186/s12943-021-01411-w

Fig. 1.

Fig. 1

Tumor-derived exosomes promote cancer metastasis. Tumor-derived exosomes through multiple mechanisms participate in cancer metastasis by reshaping the tumor microenvironment; promoting cellular epithelial–mesenchymal transformation (EMT); promoting cell proliferation, inhabiting apoptosis; immunosuppression; promoting hematogenous metastasis and angiogenesis of metastasitic tumor to promote cancer metastasis