β‐Catenin deletion in hepatoblasts disrupts hepatic morphogenesis and survival during mouse development

Xinping Tan, Youzhong Yuan, Gang Zeng, Udayan Apte, Michael D. Thompson, Benjamin Cieply, Donna B. Stolz, George K. Michalopoulos, Klaus H. Kaestner, Satdarshan P.S. Monga – 21 January 2008 – β‐Catenin, the central component of the canonical Wnt pathway, plays important roles in the processes of liver regeneration, growth, and cancer. Previously, we identified temporal expression of β‐catenin during liver development.

Cytochrome P450 2E1 contributes to ethanol‐induced fatty liver in mice

Yongke Lu, Jian Zhuge, Xiaodong Wang, Jingxiang Bai, Arthur I. Cederbaum – 21 January 2008 – Cytochrome P450 2E1 (CYP2E1) is suggested to play a role in alcoholic liver disease, which includes alcoholic fatty liver, alcoholic hepatitis, and alcoholic cirrhosis. In this study, we investigated whether CYP2E1 plays a role in experimental alcoholic fatty liver in an oral ethanol‐feeding model. After 4 weeks of ethanol feeding, macrovesicular fat accumulation and accumulation of triglyceride in liver were observed in wild‐type mice but not in CYP2E1‐knockout mice.

A prospective evaluation of computerized tomographic (CT) scanning as a screening modality for esophageal varices

Roman E. Perri, Michael V. Chiorean, Jeff L. Fidler, Joel G. Fletcher, Jayant A. Talwalkar, Linda Stadheim, Nilay D. Shah, Patrick S. Kamath – 21 January 2008 – Patients with cirrhosis require endoscopic screening for large esophageal varices. The aims of this study were to determine the cost‐effectiveness and patient preferences of a strategy employing abdominal computerized tomography (CT) as the initial screening test for identifying large esophageal varices. In a prospective evaluation,102 patients underwent both CT and endoscopic screening for gastroesophageal varices.

Hepatocytes can induce death of contacted cells via perforin‐dependent mechanism

Clifford S. Guy, Sherri L. Rankin, Jinguo Wang, Tomasz I. Michalak – 21 January 2008 – The liver displays unique immunological properties including the ability to remove aberrant cells and pathogens and to induce peripheral immunotolerance. We have previously demonstrated that hepatocytes can cause cell death by a CD95 ligand–mediated mechanism. Here, we provide evidence that hepatocytes can kill other cells via a perforin‐dependent pathway.

Lymphoid neogenesis and immune infiltration in aged liver

Pallavi Singh, Zeynep Z. Coskun, Catriona Goode, Adam Dean, LuAnn Thompson‐Snipes, Gretchen Darlington – 21 January 2008 – Immune dysregulation and inflammation play a major role in the pathology of age‐related disorders. In an earlier study, the microarray data from our laboratory indicated an increase in inflammation‐related gene expression in the liver with age. We further investigated immune‐related changes in the aged liver and found that the levels of inflammatory cytokines, chemokines, and inflammatory genes were higher in aged animals.

Esophageal capsule endoscopy for screening and surveillance of esophageal varices in patients with portal hypertension

Roberto de Franchis, Glenn M. Eisen, Loren Laine, Inaki Fernandez‐Urien, Juan Manuel Herrerias, Russell D. Brown, Laurel Fisher, Hugo E. Vargas, John Vargo, Julie Thompson, Rami Eliakim – 21 January 2008 – Bleeding from esophageal varices (EV) is a serious consequence of portal hypertension. Current guidelines recommend screening patients with cirrhosis with esophagogastroduodenoscopy (EGD) to detect varices. However, the unpleasantness and need for sedation of EGD may limit adherence to screening programs.

Mechanisms of hepatocyte growth factor–mediated and epidermal growth factor–mediated signaling in transdifferentiation of rat hepatocytes to biliary epithelium

Pallavi B. Limaye, William C. Bowen, Anne V. Orr, Jianhua Luo, George C. Tseng, George K. Michalopoulos – 21 January 2008 – Previous studies from our laboratory have demonstrated that hepatocytes can transdifferentiate into biliary epithelium (BE) both in vivo and in vitro; however, the mechanisms are unclear. The current study was designed to investigate the mechanisms of hepatocyte transdifferentiation in vitro.

Retracted: Outcome and immune reconstitution of HBV‐specific immunity in patients with reactivation of occult HBV infection after alemtuzumab‐containing chemotherapy regimen

Chee‐Kin Hui, Winnie W. Cheung, Kar‐Wai Leung, Vincent C. C. Cheng, Bone S. F. Tang, Iris W. S. Li, John M. Luk, Nikki P. Lee, Yok‐Lam Kwong, Wing‐Yan Au, Kwok‐Yung Yuen, George K. Lau, Raymond Liang – 14 January 2008 – Retraction: The following article from HEPATOLOGY, “Outcome and immune reconstitution of HBV‐specific immunity in patients with reactivation of occult HBV infection after alemtuzumab‐containing chemotherapy regiment” by Chee‐Kin Hui, Winnie W. Cheung, Kar‐Wai Leung, Vincent C. C. Cheng, Bone S. F. Tang, Iris W. S. Li, John M. Luk, Nikki P.

TIS21 negatively regulates hepatocarcinogenesis by disruption of cyclin B1–Forkhead box M1 regulation loop

Tae Jun Park, Ji Yeon Kim, S. Paul Oh, So Young Kang, Bong Wan Kim, Hee Jung Wang, Kye Yong Song, Hyoung Chin Kim, In Kyoung Lim – 14 January 2008 – A functional and biochemical interaction of TIS21/BTG2/PC3 with Forkhead box M1 (FoxM1), essential transcription factor for hepatocyte regeneration and a master regulator of mitotic gene expression, was explored.

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