Sabio lab

at the CNIC

Tag: cancer (page 1 of 2)

El tejido adiposo, mucho más que solo grasa (12 February 2012)

Guadalupe Sabio will impart the conference entitled El tejido adiposo, mucho más que solo grasa at the Spanish Royal Academy of Veterinary Sciences.

The conference will be on 12 February 2012 at 18:00.

Free entrance until seating capacity is reached. Click here to download the invitation.

Obesidad: una puerta abierta para el cáncer

«Las evidencias que muestran que el sobrepeso es un importante factor de riesgo para el desarrollo de distintos tumores no dejan de crecer», apunta Guadalupe Sabio, investigadora del Centro Nacional de Investigaciones Cardiovasculares (CNIC), cuyo grupo estudia las claves de distintas enfermedades asociadas a la obesidad, como el cáncer hepático.

[read more in El Mundo]

brown fat

H&E stainning of murine brown fat (Photo: Nuria Matesanz).

Pharmacological stimulation of p53 with low-dose doxorubicin ameliorates diet-induced nonalcoholic steatosis and steatohepatitis

Begoña Porteiro, Marcos F. Fondevila, Xabier Buque, Maria J. Gonzalez-Rellan, Uxia Fernandez, Alfonso Mora, Daniel Beiroa, Ana, Senra, Rosalia Gallego, Johan Fernø, Miguel López, Guadalupe Sabio, Carlos Dieguez, Patricia Aspichueta & Rubén Nogueiras.

Recent reports have implicated the p53 tumor suppressor in the regulation of lipid metabolism. We hypothesized that the pharmacological activation of p53 with low-dose doxorubicin, which is widely used to treat several types of cancer, may have beneficial effects on nonalcoholic fatty liver disease (NAFLD) and nonalcoholic steatohepatitis (NASH).

Hematoxylin&eosin and oil red O staining of liver sections.

We used long-term pharmacological activation of p53 by i.p. or oral administration of low-dose doxorubicin in different animal models of NAFLD (high fat diet containing 45% and 60% kcal fat) and NASH (methionine- and choline-deficient diet and choline deficiency combined with high fat diet). We also administered doxorubicin in mice lacking p53 in the liver and in two human hepatic cells lines (HepG2 and THLE2).

The attenuation of liver damage was accompanied by the stimulation of fatty acid oxidation and decrease of lipogenesis, inflammation, and ER stress. The effects of doxorubicin were abrogated in mice with liver-specific ablation of p53. Finally, the effects of doxorubicin on lipid metabolism found in animal models were also present in two human hepatic cells lines, in which the drug stimulated fatty acid oxidation and inhibited de novo lipogenesis at doses that did not cause changes in apoptosis or cell viability.

These data provide new evidence for targeting p53 as a strategy to treat liver disease


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