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Title

Intracellular proton pumps as targets in chemotherapy: V-ATPases and cancer

AuthorsHernández, Agustín ; Serrano-Bueno, Gloria ; Pérez-Castiñeira, J. R. ; Serrano, Aurelio
KeywordsSalicylihalamide
Concanamycin
Bafilomycin
Traffic.
Acidification
V-ATPase
Apoptosis
Proton gradients
Issue Date2012
PublisherBentham Science Publishers
CitationCurrent Pharmaceutical Design 18: 1383- 1394 (2012)
AbstractCancer cells show a metabolic shift that makes them overproduce protons; this has the potential to disturb the cellular acid-base homeostasis. However, these cells show cytoplasmic alkalinisation, increased acid extrusion and endosome-dependent drug resistance. Vacuolar type ATPases (V-ATPases), together with other transporters, are responsible to a great extent for these symptoms. These multi-subunit proton pumps are involved in the control of cytosolic pH and the generation of proton gradients (positive inside) across en-docellular membrane systems like Golgi, endosomes or lysosomes. In addition, in tumours, they have been shown to play an important role in the acidification of the intercellular medium. This importance makes them an attractive target to control tumour cell proliferation. In the present review we present the major characteristics of this kind of proton pumps and we provide some recent insights on their in vivo regulation. Also, we review some of the consequences that V-ATPase inhibition carries for the tumour cell, such as cell cycle arrest or cell death, and provide a brief summary of the studies related to cancer made recently with commercially available inhibitors. In the light of recent knowledge on the regulation of this proton pump, some new approaches to impair V-ATPase function are also suggested. © 2012 Bentham Science Publishers.
URIhttp://hdl.handle.net/10261/178713
Identifiersdoi: null
issn: 1381-6128
Appears in Collections:(IBVF) Artículos
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