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DIGITAL.CSIC
Article . 2013 . Peer-reviewed
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Papel de la caveolina-1 en la regeneración hepática tras hepatectomía parcial. Mecanismos de señalización y función en la regulación de la proliferación hepática

Authors: Mayoral, Rafael; Fernández-Martínez, Amalia; Roy, Rosa; Boscá, Lisardo; Martín-Sanz, Paloma;

Papel de la caveolina-1 en la regeneración hepática tras hepatectomía parcial. Mecanismos de señalización y función en la regulación de la proliferación hepática

Abstract

[ES]: Las caveolas participan en múltiples procesos celulares tales como el transporte vesicular, homeostasis del colesterol, regulación de la señalización intracelular, por integrinas y proliferación celular. Sin embargo, su función en el hígado no está bien establecida. La expresión de caveolina 1 (Cav), la proteína más abundante en las caveolas, está bien descrita en el hígado y en varias líneas de hepatocitos y en hígado cirrótico humano y en carcinoma hepatocelular. Sin embargo, el papel de Cav-1 en la fisiopatología hepática es controvertido, ya que se ha propuesto un papel crítico en el proceso de regeneración tras hepatectomía parcial (HP). Contrariamente a esta observación, nuestros datos sugieren que Cav-1 aumenta en el hígado regenerante, con una re-distribución de la proteína desde las caveolas hacia dominios no caveolares. Además, la Cav-1 localizada en estas fracciones está fosforilada en la tirosina 14. A pesar de ello, el gen de la Cav-1 es dispensable para la regeneración hepática tras HP, tal como se deduce de animales que carecen de este gen. En conjunto, estos datos muestran un papel dinámico de la Cav-1 en la proliferación hepática tras HP y en líneas hepáticas en cultivo, pero con mínimas implicaciones en el proceso regenerativo.

[EN]: Although caveolae participate in many cellular processes such as vesicular transport, cholesterol homeostasis, regulation of signal transduction, integrin signaling and cell growth, their role in liver remains elusive. Expression of caveolin 1 (Cav), the most abundant protein of caveolae, has been reported in liver and in different hepatocyte cell lines, in human cirrhotic liver and in hepatocellular carcinomas. However, the role of Cav-1 in liver pathophysiology remains controversial and a critical role in regeneration after partial hepatectomy (PH) has been reported. Opposite to this observation, our data support the view that Cav-1 increases in liver after PH with a redistribution of the protein from the caveolae enriched domain to the noncaveolar fraction. Moreover, the Cav-1 located in the noncaveolar fraction is phosphorylated in tyrosine 14 (Tyr14). Even though, the Cav-1 gene is dispensable for liver regeneration after PH as deduced from data obtained with commercially available animals lacking this gene. Taken together these results support a dynamic role for Cav-1 in liver proliferation both in vivo after PH, and in vitro in cultured hepatic cell lines, but with minimal implications in the liver regeneration process.

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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