The Association of Integrins β3, β4, and αVβ5 on Exosomes, CTCs and Tumor Cells with Localization of Distant Metastasis in Breast Cancer Patients

Integrins are cell adhesion receptors, which play a role in breast cancer invasion, angiogenesis, and metastasis. Moreover, it has been shown that exosomal integrins provide organotropic metastasis in a mouse model. In our study, we aimed to investigate the expression of integrins β3, β4, and αVβ5 o...

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Published in:	International journal of molecular sciences Vol. 24; no. 3; p. 2929
Main Authors:	Grigoryeva, Evgeniya S, Tashireva, Luibov A, Savelieva, Olga E, Zavyalova, Marina V, Popova, Nataliya O, Kuznetsov, Gleb A, Andryuhova, Elena S, Perelmuter, Vladimir M
Format:	Journal Article
Language:	English
Published:	Switzerland MDPI AG 02-02-2023 MDPI
Subjects:	Angiogenesis Animals Breast cancer Breast Neoplasms - metabolism CD44 antigen Cell adhesion Cell Line, Tumor circulating tumor cells E-cadherin Exosomes Exosomes - metabolism integrin Integrin beta3 Integrin beta4 - metabolism Integrins Integrins - metabolism Liver Liver Neoplasms - pathology Localization Lung cancer Lung Neoplasms - pathology Lungs Lymphatic system Melanoma Metastases Metastasis Mice Neoplasm Metastasis - pathology Neoplastic Cells, Circulating Patients Tumor cells Tumors breast cancer circulating tumor cells integrin metastasis exosomes
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Summary:	Integrins are cell adhesion receptors, which play a role in breast cancer invasion, angiogenesis, and metastasis. Moreover, it has been shown that exosomal integrins provide organotropic metastasis in a mouse model. In our study, we aimed to investigate the expression of integrins β3, β4, and αVβ5 on exosomes and tumor cells (circulating tumor cells and primary tumor) and their association with the localization of distant metastasis. We confirmed the association of exosomal integrin β4 with lung metastasis in breast cancer patients. However, we were unable to evaluate the role of integrin β3 in brain metastasis due to the rarity of this localization. We established no association of exosomal integrin αVβ5 with liver metastasis in our cohort of breast cancer patients. The further evaluation of β3, β4, and αVβ5 integrin expression on CTCs revealed an association of integrin β4 and αVβ5 with liver, but not the lung metastases. Integrin β4 in the primary tumor was associated with liver metastasis. Furthermore, an in-depth analysis of phenotypic characteristics of β4+ tumor cells revealed a significantly increased proportion of E-cadherin+ and CD44+CD24- cells in patients with liver metastases compared to patients with lung or no distant metastases.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	1422-0067 1661-6596 1422-0067
DOI:	10.3390/ijms24032929