30 December 2003

Dhiraj Tripathi, Peter C. Hayes – 30 December 2003

Ala I. Sharara, Don C. Rockey – 30 December 2003

Marielle Delnomdedieu, Laurence W. Hedlund, Robert R. Maronpot, G. Allan Johnson – 30 December 2003 – The development of magnetic resonance (MR) microscopy has provided new approaches to histology and histopathology. Recent work has shown the promise of increased sensitivity in animal models of chemically induced hepatotoxicity. However, the field is so new that there is little experience to relate changes seen in MR micrographs to the more traditional optical images stained with hematoxylin and eosin.

Hannu Raunio, Risto Juvonen, Markku Pasanen, Olavi Pelkonen, Paavo Pääkkö, Ylermi Soini – 30 December 2003 – The hepatic cytochrome P4502A6 (CYP2A6) enzyme mediates the oxidative metabolism of several procarcinogens that have liver as their primary target. Mouse models indicate that liver tumors invariably overexpress CYP2A forms, and that inflammation and cirrhosis may regulate the CYP2A expression pattern. In this study, the distribution of the CYP2A6 protein was investigated in a series of 24 human hepatocellular carcinoma (HCC) samples by immunohistochemical analysis.

Elisa M. Konieczko, Amy K. Ralston, Aleta R. Crawford, Saul J. Karpen, James M. Crawford – 30 December 2003 – Although bile salts are toxic to the liver at high plasma concentrations, the effects of physiological concentrations of bile salts on normal hepatic function are poorly understood. We examined the effect of taurocholate (TC) on the basolateral uptake of [3H]TC in WIF‐B cells, a hybrid cell line stably exhibiting in vitro the structural and functional polarity of hepatocytes.

Esteban Mezey, Lynda Rennie‐Tankersley, James J. Potter – 30 December 2003 – Dihydrotestosterone decreased alcohol dehydrogenase (ADH) activity and enzyme‐protein in rat hepatocytes in culture. This effect was observed after the hepatocytes had been exposed to dihydrotestosterone for 3 days at concentrations of 0.5 μmol/L or higher. Dihydrotestosterone did not decrease alcohol dehydrogenase messenger RNA (mRNA) but, rather, resulted in small increases in ADH mRNA after 3 days of exposure.

Kunio Okuda, Masahiro Arakawa, Yasuhiko Kubo, Kenji Sakata, Masayoshi Kage, Shozo Iwamoto, Shigeaki Takeda, Koshi Sonoda, Hayato Sanefuji – 30 December 2003 – Pedunculated hepatocellular carcinoma (HCC) or extrahepatic growth of HCC is an uncommon but not rare pathological form, but its genesis is unknown. Right‐sided adrenal metastases of HCC that were abutting on or about to fuse with the right hepatic lobe were resected in three patients. The masses seemed to have originated in the para‐adrenal tissue, leaving the adrenal gland intact.

Li Yin, Nader Ghebranious, Subhendu Chakraborty, Christine E. Sheehan, Zoran Ilic, Stewart Sell – 30 December 2003 – The effect of expression of the p53 gene, in the presence or absence of the p53ser246 mutation (p53*), on ploidization (image cytometry), proliferation (expression of proliferating cell nuclear antigen and radioactive thymidine histoautoradiography), and apoptosis (in situ detection of DNA fragments) is determined in hepatocytes of p53‐null and p53‐transgenic mice.

H J Alter, C Conry‐Cantilena, J Melpolder, D Tan, Mark Van Raden, D Herion, D Lau, J H Hoofnagle – 30 December 2003 – Among 248 asymptomatic blood donors positive for antibody to hepatitis C virus (anti‐HCV) enrolled in a long‐term prospective study, 86% had chronic HCV infection and 14% appeared to have recovered as assessed by serial determinations of serum alanine aminotransferase (ALT) levels and HCV RNA by polymerase chain reaction. Established parenteral risk factors for HCV transmission were identified in 75% of donors.