Proteomic Characterization of Serum Small Extracellular Vesicles in Human Breast Cancer
Xu, G.; Huang, W.; Du, S.; Huang, M.; Lyu, J.; Zhou, F.; Zhu, R.; Cao, Y.; Xv, J.; Li, N.; Yu, G.; Jiang, B.; Gires, O.; Zhou, L.; Zhang, H.; Ding, C.; Wang, H.
Show abstract
There is a lack of comprehensive understanding of breast cancer (BC) specific sEVs characteristics and composition on BC unique proteomic information from human samples. Here, we interrogated the proteomic landscape of sEVs in 167 serum samples from patients with BC, benign mammary disease (BD) and from healthy donors (HD). The analysis provides a comprehensive landscape of serum sEVs with totally 9,589 proteins identified, considerably expanding the panel of sEVs markers. Of note, serum BC-sEVs protein signatures were distinct from those of BD and HD, representing stage- and molecular subtype-specific patterns. We constructed specific sEVs protein identifiers that could serve as a liquid biopsy tool for diagnosis and classification of BC from benign mammary disease, molecular subtypes, as well as assessment of lymph node metastasis. We also identified 11 potential survival biomarkers for distant metastasis. This work may provide reference value for the accurate diagnosis and monitoring of BC progression using serum sEVs.
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