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Title: Angiotensin Converting Enzyme Regulates Cell Proliferation and Migration
Authors: de Alvarenga, Erika Costa
Fonseca, Matheus de Castro
Carvalho, Clarissa Coelho
Florentino, Rodrigo Machado
Franca, Andressa
Matias, Eveline
Guimarães, Paola Bianchi [UNIFESP]
Batista, Carolina [UNIFESP]
Freire, Valder
Carmona, Adriana Karaoglanovic [UNIFESP]
Pesquero, João Bosco [UNIFESP]
de Paula, Ana Maria
Foureaux, Giselle
Leite, Maria de Fatima
Issue Date: 2016
Publisher: Public Library Science
Citation: Plos One. San Francisco, v. 11, n. 12, p. -, 2016.
Abstract: Background The angiotensin-I converting enzyme (ACE) plays a central role in the renin-angiotensin system, acting by converting the hormone angiotensin-I to the active peptide angiotensin-II (Ang-II). More recently, ACE was shown to act as a receptor for Ang-II, and its expression level was demonstrated to be higher in melanoma cells compared to their normal counterparts. However, the function that ACE plays as an Ang-II receptor in melanoma cells has not been defined yet. Aim Therefore, our aim was to examine the role of ACE in tumor cell proliferation and migration. Results We found that upon binding to ACE, Ang-II internalizes with a faster onset compared to the binding of Ang-II to its classical AT1 receptor. We also found that the complex Ang-II/ACE translocates to the nucleus, through a clathrin-mediated process, triggering a transient nuclear Ca2+ signal. In silico studies revealed a possible interaction site between ACE and phospholipase C (PLC), and experimental results in CHO cells, demonstrated that the beta 3 isoform of PLC is the one involved in the Ca2+ signals induced by Ang-II/ACE interaction. Further studies in melanoma cells (TM-5) showed that Ang-II induced cell proliferation through ACE activation, an event that could be inhibited either by ACE inhibitor (Lisinopril) or by the silencing of ACE. In addition, we found that stimulation of ACE by Ang-II caused the melanoma cells to migrate, at least in part due to decreased vinculin expression, a focal adhesion structural protein. Conclusion ACE activation regulates melanoma cell proliferation and migration.
ISSN: 1932-6203
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