T2 hyperintensity along the cortico‐spinal tract in cirrhosis relates to functional abnormalities

Juan Córdoba, Nuria Raguer, Montserrat Flavià, Víctor Vargas, Carlos Jacas, Juli Alonso, Alex Rovira – 7 March 2007 – Magnetic resonance has shown T2 hyperintensity along the cortico‐spinal tract in the brain of cirrhotic patients. This abnormality, which is reversible after liver transplantation, appears to correspond to mild edema. Because astrocytic edema present in hepatic encephalopathy may be responsible for neuronal dysfunction, we studied whether T2 hyperintensity along the cortico‐spinal tract may relate to functional abnormalities.

S‐adenosylhomocysteine sensitizes to TNF‐α hepatotoxicity in mice and liver cells: A possible etiological factor in alcoholic liver disease

Zhenyuan Song, Zhanxiang Zhou, Silvia Uriarte, Lipeng Wang, Y. James Kang, Theresa Chen, Shirish Barve, Craig J. McClain – 7 March 2007 – In alcoholic liver disease, tumor necrosis factor‐α (TNFα) is a critical effector molecule, and abnormal methionine metabolism is a fundamental acquired metabolic abnormality. Although hepatocytes are resistant to TNFα‐induced killing under normal circumstances, previous studies have shown that primary hepatocytes from rats chronically fed alcohol have increased TNFα cytotoxicity.

Aging does not reduce the hepatocyte proliferative response of mice to the primary mitogen TCPOBOP

Giovanna M. Ledda‐Columbano, Monica Pibiri, Costanza Cossu, Francesca Molotzu, Joseph Locker, Amedeo Columbano – 7 March 2007 – It has been shown that the magnitude of DNA synthesis and the time at which maximal DNA synthesis occurs after two‐thirds partial hepatectomy (PH) is greatly reduced in the liver of aged rodents compared to young animals. This reduction could represent an intrinsic defect in proliferation or a more specialized change in the response to PH.

Ex Vivo transduced liver progenitor cells as a platform for gene therapy in mice

Sihong Song, Rafal P. Witek, Yuanqing Lu, Young‐Kook Choi, Donghang Zheng, Marda Jorgensen, Chengwen Li, Terence R. Flotte, Byron E. Petersen – 7 March 2007 – Allogeneic stem cell‐based transplants may be limited by allograft rejection, as is seen with conventional organ transplantation. One way to avert such a response is to use autologous stem cells, but that may carry the risk of recurrence of the original disease, particularly in the context of a genetic defect.

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