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CTC clusters induced by heparanase enhance breast cancer metastasis.


ABSTRACT: Aggregated metastatic cancer cells, referred to as circulating tumor cell (CTC) clusters, are present in the blood of cancer patients and contribute to cancer metastasis. However, the origin of CTC clusters, especially intravascular aggregates, remains unknown. Here, we employ suspension culture methods to mimic CTC cluster formation in the circulation of breast cancer patients. CTC clusters generated using these methods exhibited an increased metastatic potential that was defined by the overexpression of heparanase (HPSE). Heparanase induced FAK- and ICAM-1-dependent cell adhesion, which promoted intravascular cell aggregation. Moreover, knockdown of heparanase or inhibition of its activity with JG6, a heparanase inhibitor, was sufficient to block the formation of cell clusters and suppress breast cancer metastasis. Our data reveal that heparanase-mediated cell adhesion is critical for metastasis mediated by intravascular CTC clusters. We also suggest that targeting the function of heparanase in cancer cell dissemination might limit metastatic progression.

SUBMITTER: Wei RR 

PROVIDER: S-EPMC6289387 | biostudies-literature | 2018 Aug

REPOSITORIES: biostudies-literature

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CTC clusters induced by heparanase enhance breast cancer metastasis.

Wei Rong-Rui RR   Sun Dan-Ni DN   Yang Hong H   Yan Juan J   Zhang Xiong X   Zheng Xing-Ling XL   Fu Xu-Hong XH   Geng Mei-Yu MY   Huang Xun X   Ding Jian J  

Acta pharmacologica Sinica 20180208 8


Aggregated metastatic cancer cells, referred to as circulating tumor cell (CTC) clusters, are present in the blood of cancer patients and contribute to cancer metastasis. However, the origin of CTC clusters, especially intravascular aggregates, remains unknown. Here, we employ suspension culture methods to mimic CTC cluster formation in the circulation of breast cancer patients. CTC clusters generated using these methods exhibited an increased metastatic potential that was defined by the overexp  ...[more]

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