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Abstract Title:

Exosomes derived from breast cancer lung metastasis subpopulations promote tumor self-seeding.

Abstract Source:

Biochem Biophys Res Commun. 2018 Jun 11. Epub 2018 Jun 11. PMID: 29885840

Abstract Author(s):

Hehai Huang, Xianchong Zheng, Changqing Cai, Zhuocheng Yao, Sitong Lu, Xiaojing Meng, Yutian Miao, Zhanxin He, Chunqing Cai, Fei Zou

Article Affiliation:

Hehai Huang

Abstract:

Lung metastasis is a primary obstacle in the clinical treatment of metastatic breast cancer. Most patients with lung metastasis eventually die of recurrence. Recurrence may be related to self-seeding, which occurs when circulating tumor cells re-seed into the tumors they originated from (metastasis or carcinoma in situ). Tumor-derived exosomes have been intensively revealed to promote the progression of various cancers. However, whether tumor-derived exosomes play roles in tumor self-seeding has not yet been identified. By establishing a self-seeding nude mouse model, we found that exosomes derived from MDA231-LM2 cells (subpopulations of breast cancer lung metastasis) potentiate the growth of MDA-MB-231 xenografts. More importantly, laser confocal microscopy and flow cytometry results identified that MDA231-LM2-secreted exosomes promote the seeding of MDA231-LM2 cells into MDA-MB-231 xenografts. These findings suggest MDA231-LM2-secreted exosomes as a promising target to treat breast cancer lung metastasis.

Study Type : Animal Study

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Sayer Ji
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