UMMS Affiliation
Department of Biochemistry and Molecular Pharmacology
Publication Date
2019-09-24
Document Type
Article
Disciplines
Amino Acids, Peptides, and Proteins | Biochemistry | Cell Biology | Cells | Enzymes and Coenzymes
Abstract
Leptin is one of the main adipokines secreted in breast tissue. Leptin promotes epithelial-mesenchymal transition (EMT), cell migration and invasion in epithelial breast cells, leading to tumor progression. Although, the molecular mechanisms that underlie these events are not fully understood, the activation of different signaling pathways appears to be essential. In this sense, the effects of leptin on the activation of kinases like Src and FAK, which regulate signaling pathways that activate the EMT program, are not completely described. Therefore, we investigated the involvement of these kinases using an in vitro model for leptin-induced EMT process in the non-tumorigenic MCF10A cell line. To this end, MCF10A cells were stimulated with leptin, and Src and FAK activation was assessed. Specific events occurring during EMT were also evaluated in the presence or absence of the kinases' chemical inhibitors PP2 and PF-573228. For instance, we tested the expression and subcellular localization of the EMT-related transcription factors Twist and beta-catenin, by western blot and immunofluorescence. We also evaluated the secretion and activation of matrix metalloproteases (MMP-2 and MMP-9) by gelatin zymography. Invasiveness properties of leptin-stimulated cells were determined by invadopodia formation assays, and by the Transwell chamber method. Our results showed that leptin promotes EMT through Src and FAK activation, which leads to the secretion and activation of MMP-2 and MMP-9, invadopodia formation and cell invasion in MCF10A cells. In conclusion, our data suggest that leptin promotes an increase in the expression levels of Twist and beta-catenin, the secretion of MMP-2, MMP-9, the invadopodia formation and invasion in MCF10A cells in a Src and FAK-dependent manner.
Keywords
EMT, FAK, Src, invasion, leptin, transcription factors
Rights and Permissions
© 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
DOI of Published Version
10.3390/cells8101133
Source
Cells. 2019 Sep 24;8(10). pii: cells8101133. doi: 10.3390/cells8101133. Link to article on publisher's site
Journal/Book/Conference Title
Cells
Related Resources
PubMed ID
31554180
Repository Citation
Olea-Flores M, Zuniga-Eulogio M, Tacuba-Saavedra A, Bueno-Salgado M, Sanchez-Carvajal A, Vargas-Santiago Y, Mendoza-Catalan MA, Perez Salazar E, Garcia-Hernandez A, Padilla-Benavides T, Navarro-Tito N. (2019). Leptin Promotes Expression of EMT-Related Transcription Factors and Invasion in a Src and FAK-Dependent Pathway in MCF10A Mammary Epithelial Cells. Open Access Articles. https://doi.org/10.3390/cells8101133. Retrieved from https://escholarship.umassmed.edu/oapubs/3973
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.
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Amino Acids, Peptides, and Proteins Commons, Biochemistry Commons, Cell Biology Commons, Cells Commons, Enzymes and Coenzymes Commons