Lower body impedance for the evaluation of venovenous bypass flow

E Ejlersen, P Sode, C Skak, A Rasmussen, K Espersen, P Kirkegaard, N H Secher – 30 December 2003 – Inferior vena cava (IVC) clamping during liver transplantation causes venous congestion in the splanchnic and IVC beds. A venovenous bypass relieves congestion and improves cardiac output (CO), but the bypass flow required for adequate drainage of the vascular beds is controversial. In this study we evaluated the bypass flow necessary to compensate for the IVC clamping. Lower body impedance (BI) is inversely related to tissue fluid content and was used to reflect congestion.

Methemoglobinemia associated with dapsone treatment in solid organ transplant recipients: A two‐case report and review

J S Plotkin, J F Buell, M J Njoku, S Wilson, P C Kuo, S T Bartlett, C Howell, L B Johnson – 30 December 2003 – Dapsone, a sulfone antibiotic, has been increasingly used in solid‐organ transplant recipients for the primary prevention of Pneumocystis carinii pneumonia, especially in patients with documented sulfa allergy. A known side effect of dapsone therapy, however, is methemoglobinemia, a condition leading to impaired tissue oxygen delivery.

Liver transplantation from non–heart beating donors in rats: Influence of viscosity and temperature of initial flushing solutions on graft function

T Tojimbara, W N Wicomb, R Garcia‐Kennedy, W Burns, M Hayashi, G Collins, C O Esquivel – 30 December 2003 – Background: We evaluated the effect of warm (37 degrees C) versus cold (4 degrees C) solutions as the initial flush for liver preservation from non‐heart beating donors in rats. Methods: An initial flush was performed just before donor hepatectomy with cold or warm University of Wisconsin solution (UW), UW without hydroxyethyl starch, sodium lactobionate sucrose solution, or lactated Ringer's solution as the control group.

Long‐term incidence of hepatitis B virus resistance to lamivudine in human immunodeficiency virus–infected patients

Yves Benhamou, Marie Bochet, Vincent Thibault, Vincent Di Martino, Eric Caumes, François Bricaire, Pierre Opolon, Christine Katlama, Thierry Poynard – 30 December 2003 – Hepatitis B virus (HBV) resistance to lamivudine has not been extensively documented in human immunodeficiency virus (HIV)‐infected patients. We studied the long‐term incidence of HBV resistance to lamivudine in HIV‐positive patients. Sixty‐six HIV‐HBV–coinfected patients were studied while receiving lamivudine (150 mg twice daily) as a part of antiretroviral therapy.

Characterization of the reactivity pattern of murine monoclonal antibodies against wild‐type hepatitis B surface antigen to g145r and other naturally occurring “a” loop escape mutations

Michel P. Cooreman, Mark H. van Roosmalen, René te Morsche, Cécile M. G. Sünnen, Esther M. E. Schoondermark‐van de Ven, Jan B. M. J. Jansen, Guido N. J. Tytgat, Pauline L. M. de Wit, Wilma P. Paulij – 30 December 2003 – The hepatitis B surface antigen (HBsAg) “a” domain harbors major B‐cell epitopes. Viruses with mutations in this region emerge after vaccination or during hepatitis B immune globulin (HBIg) prophylaxis. A strain with G145R replacement has been almost invariably isolated as a major escape mutant.

CYP2E1‐mediated oxidative stress induces collagen type I expression in rat hepatic stellate cells

Natalia Nieto, Scott L. Friedman, Patricia Greenwel, Arthur I. Cederbaum – 30 December 2003 – Hepatic stellate cells (HSCs) are a major source of extracellular matrix, which, during fibrogenesis, undergo a process of “activation” characterized by increased proliferation and collagen synthesis. Oxidative stress can stimulate HSC proliferation and collagen synthesisin vitro. Cytochrome P4502E1 (CYP2E1) is an effective producer of reactive oxygen species.

Extracellular signal‐regulated kinase activation differentially regulates platelet‐derived growth factor's actions in hepatic stellate cells, and is induced by In Vivo liver injury in the rat

Fabio Marra, Maria Cristina Arrighi, Marilena Fazi, Alessandra Caligiuri, Massimo Pinzani, Roberto G. Romanelli, Eva Efsen, Giacomo Laffi, Paolo Gentilini – 30 December 2003 – Upon liver injury, hepatic stellate cells (HSC) show increased proliferation, motility, and extracellular matrix (ECM) production. The extracellular signal‐regulated kinases (ERK) control different functions in a cell‐specific manner. In this study, we evaluated the role of ERK activation in cultured HSC stimulated with platelet‐derived growth factor (PDGF) and after induction of liver injuryin vivo.

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