FR58P1a; a new uncoupler of OXPHOS that inhibits migration in triple-negative breast cancer cells via Sirt1/AMPK/β1-integrin pathway.

Abstract:

:Highly malignant triple-negative breast cancer (TNBC) cells rely mostly on glycolysis to maintain cellular homeostasis; however, mitochondria are still required for migration and metastasis. Taking advantage of the metabolic flexibility of TNBC MDA-MB-231 cells to generate subpopulations with glycolytic or oxidative phenotypes, we screened phenolic compounds containing an ortho-carbonyl group with mitochondrial activity and identified a bromoalkyl-ester of hydroquinone named FR58P1a, as a mitochondrial metabolism-affecting compound that uncouples OXPHOS through a protonophoric mechanism. In contrast to well-known protonophore uncoupler FCCP, FR58P1a does not depolarize the plasma membrane and its effect on the mitochondrial membrane potential and bioenergetics is moderate suggesting a mild uncoupling of OXPHOS. FR58P1a activates AMPK in a Sirt1-dependent fashion. Although the activation of Sirt1/AMPK axis by FR58P1a has a cyto-protective role, selectively inhibits fibronectin-dependent adhesion and migration in TNBC cells but not in non-tumoral MCF10A cells by decreasing β1-integrin at the cell surface. Prolonged exposure to FR58P1a triggers a metabolic reprograming in TNBC cells characterized by down-regulation of OXPHOS-related genes that promote cell survival but comprise their ability to migrate. Taken together, our results show that TNBC cell migration is susceptible to mitochondrial alterations induced by small molecules as FR58P1a, which may have therapeutic implications.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Urra FA,Muñoz F,Córdova-Delgado M,Ramírez MP,Peña-Ahumada B,Rios M,Cruz P,Ahumada-Castro U,Bustos G,Silva-Pavez E,Pulgar R,Morales D,Varela D,Millas-Vargas JP,Retamal E,Ramírez-Rodríguez O,Pessoa-Mahana H,Pavani M,Fer

doi

10.1038/s41598-018-31367-9

subject

Has Abstract

pub_date

2018-09-04 00:00:00

pages

13190

issue

1

issn

2045-2322

pii

10.1038/s41598-018-31367-9

journal_volume

8

pub_type

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