1. Proteomic analysis of TGFβ-induced A549 secretome identifies putative regulators of epithelial-mesenchymal transition.
- Author
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Sharma A, Upadhyay V, Sarkar M, Mishra M, Thacker G, and Trivedi AK
- Subjects
- A549 Cells, Humans, Secretome, Transforming Growth Factor beta metabolism, Transforming Growth Factor beta pharmacology, Epithelial-Mesenchymal Transition, Proteomics
- Abstract
Imparting epithelial to mesenchymal transition (EMT) during cellular transformation, a major driving force behind tumor progression, is one of the notorious oncogenic activities of transforming growth factor β (TGFβ); however, the secretary factors released during TGFβ-induced EMT that may have role in potentiating EMT and tumor progression are poorly known. This study was undertaken to identify such secreted protein factors from TGFβ-induced A549 cells cultured in serum-free chemically defined medium (Freestyle
TM ) using Matrix Assisted Laser Desorption Ionization-Time of flight/Time of flight (MALDI-TOF/TOF) mass spectrometry. We identified some of the potential factors such as ESR, ANXA2, ALDH1A, TGFβ-induced protein ig-h3, and PAI-1 that were not only secreted but some were also elevated in TGFβ-induced A549 cells. Interestingly, these factors are widely reported to play crucial role in EMT induction and progression, which not only validates our findings but also opens avenues for further investigation, if upon secretion they act exogenously through certain receptors to potentiate cellular signaling involved in EMT induction and tumor progression., (© 2021 International Union of Biochemistry and Molecular Biology, Inc.)- Published
- 2022
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