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Angiotensin II promotes primary tumor growth and metastasis formation of murine TNBC 4T1 cells through the fibroblasts around cancer cells.
- Source :
-
European journal of pharmacology [Eur J Pharmacol] 2021 Oct 15; Vol. 909, pp. 174415. Date of Electronic Publication: 2021 Aug 08. - Publication Year :
- 2021
-
Abstract
- Angiotensin II (Ang II) reportedly facilitates primary tumor growth and distal hematogenous metastasis formation in various murine intravenous metastasis models. However, it is unclear whether Ang II accelerates the initial processes of metastasis formation that begins in primary tumors surrounded by tumor microenvironment. We examined the effects of Ang II on primary tumors and lung metastasis lesions using a murine spontaneous metastasis model, in which triple negative breast cancer 4T1 cells constitutively expressing luciferase (4T1-Luc cells) were injected into the mammary fat pad of BALB/c mice. Subcutaneous injection of Ang II significantly accelerated primary tumor growth and lung metastasis formation. Ang II increased the protein expression levels of c-Myc, cyclin D1, fibronectin, vimentin, αSMA and Snail, and the treatment with the Ang II type 1 receptor blocker valsartan significantly suppressed the Ang II-induced increases of fibronectin and vimentin. Valsartan also significantly reduced lung metastatic lesions. However, Ang II did not have significant effects on 4T1-Luc cells including the proliferation, migration, invasion, or the expressions of proteins related to cell proliferation and epithelial-to-mesenchymal transition. In contrast, when 4T1-Luc cells were co-cultured with dermal fibroblasts, Ang II significantly accelerated cell migration and increased the expressions of fibronectin, vimentin, αSMA and Snail in 4T1-Luc cells. And moreover, Ang II significantly increased the mRNA expression of IL-6 in fibroblasts co-cultured with 4T1-Luc cells. These results suggested that Ang II accelerates surrounding fibroblasts by soluble factors such as IL-6 to promote epithelial-to-mesenchymal transition, which result in the initiation of cancer metastasis.<br /> (Copyright © 2021 Elsevier B.V. All rights reserved.)
- Subjects :
- Animals
Cancer-Associated Fibroblasts metabolism
Cell Line, Tumor
Disease Models, Animal
Epithelial-Mesenchymal Transition
Female
Humans
Lung pathology
Mammary Glands, Animal pathology
Mice
Tumor Microenvironment
Angiotensin II metabolism
Cancer-Associated Fibroblasts pathology
Lung Neoplasms secondary
Triple Negative Breast Neoplasms pathology
Subjects
Details
- Language :
- English
- ISSN :
- 1879-0712
- Volume :
- 909
- Database :
- MEDLINE
- Journal :
- European journal of pharmacology
- Publication Type :
- Academic Journal
- Accession number :
- 34375673
- Full Text :
- https://doi.org/10.1016/j.ejphar.2021.174415