Connexins orchestrate progression of breast cancer metastasis to the brain by promoting FAK activation.

Details

Serval ID
serval:BIB_F3A5420A158C
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Connexins orchestrate progression of breast cancer metastasis to the brain by promoting FAK activation.
Journal
Science translational medicine
Author(s)
Lorusso G., Wyss C.B., Kuonen F., Vannini N., Billottet C., Duffey N., Pineau R., Lan Q., Wirapati P., Barras D., Tancredi A., Lyck R., Lehr H.A., Engelhardt B., Delorenzi M., Bikfalvi A., Rüegg C.
ISSN
1946-6242 (Electronic)
ISSN-L
1946-6234
Publication state
Published
Issued date
07/09/2022
Peer-reviewed
Oui
Volume
14
Number
661
Pages
eaax8933
Language
english
Notes
Publication types: Journal Article
Publication Status: ppublish
Abstract
Brain metastasis is a complication of increasing incidence in patients with breast cancer at advanced disease stage. It is a severe condition characterized by a rapid decline in quality of life and poor prognosis. There is a critical clinical need to develop effective therapies to prevent and treat brain metastases. Here, we describe a unique and robust spontaneous preclinical model of breast cancer metastasis to the brain (4T1-BM <sub>2</sub> ) in mice that has been instrumental in uncovering molecular mechanisms guiding metastatic dissemination and colonization of the brain. Key experimental findings were validated in the additional murine D2A1-BM <sub>2</sub> model and in human MDA231-BrM <sub>2</sub> model. Gene expression analyses and functional studies, coupled with clinical transcriptomic and histopathological investigations, identified connexins (Cxs) and focal adhesion kinase (FAK) as master molecules orchestrating breast cancer colonization of the brain. Cx31 promoted homotypic tumor cell adhesion, heterotypic tumor-astrocyte interaction, and FAK phosphorylation. FAK signaling prompted NF-κB activation inducing Lamc2 expression and laminin 332 (laminin 5) deposition, α6 integrin-mediated adhesion, and sustained survival and growth within brain parenchyma. In the MDA231-BrM <sub>2</sub> model, the human homologous molecules CX43, LAMA4, and α3 integrin were involved. Systemic treatment with FAK inhibitors reduced brain metastasis progression. In conclusion, we report a spontaneous model of breast cancer metastasis to the brain and identified Cx-mediated FAK-NF-κB signaling as a mechanism promoting cell-autonomous and microenvironmentally controlled cell survival for brain colonization. Considering the limited therapeutic options for brain metastatic disease in cancer patients, we propose FAK as a therapeutic candidate to further pursue in the clinic.
Keywords
Animals, Brain/metabolism, Brain Neoplasms, Breast Neoplasms/genetics, Connexins/metabolism, Female, Focal Adhesion Protein-Tyrosine Kinases/genetics, Focal Adhesion Protein-Tyrosine Kinases/metabolism, Humans, Melanoma, Mice, NF-kappa B/metabolism, Quality of Life, Skin Neoplasms
Pubmed
Create date
08/09/2022 15:00
Last modification date
21/09/2022 6:37
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