Liver cirrhosis is a major clinical problem worldwide and is associated with significant morbidity and mortality from its complications, such as liver cell insufficiency with coagulopathy and hepatic encephalopathy, portal hypertension with ascites and gastrointestinal bleeding, hepatorenal syndrome, HCC development and others. This volume, the proceedings of Falk Symposium 115 held in Basel, Switzerland, October 22-24, 1999 (Part II of the Basel Liver Week 1999; XI International Congress of Liver Diseases) covers our present knowledge of the aetiologies and early stages of liver cirrhosis development. Based on this information, strategies are discussed that are aimed at the prevention, early diagnosis and therapy of chronic liver diseases, thus preventing their progression to cirrhosis and its complications, including HCC development. The main topics mentioned above are complemented by three state-of-the-art chapters on modern aspects of medicine in general and hepatology in particular as well as their perspectives beyond the year 2000: `Molecular Medicine', `New Hepatitis Viruses' and `Genetic Liver Diseases: Diagnosis and Therapy'. Introductory chapters focusing on the more basic aspects of the biology of live cells as well as on the mechanisms underlying fibrogenesis, cholestasis and inflammation will be followed by a detailed discussion of the clinically most important causes of liver cirrhosis worldwide: hepatitis viruses B, C and D; toxins (alcohol, drugs and others) as well as metabolic liver diseases (haemochromatosis, Wilson disease, alpha-1-antitrypsin deficiency, porphyria cutanea tarda and protoporphyria). This book, therefore, will interest clinically oriented basic scientists as well as those in clinical practice, givng an update on many aspects of modern hepatology and its perspectives in the next millennium.

In recent years, knowledge about the cell biology of the cholangiocytes and the function of the bile ducts has increased considerably. Their role in liver diseases is increasingly recognized. As a consequence, important progress has been made not only in the pathogenesis and pathophysiology but also in the diagnosis and treatment of biliary liver diseases. This book, the proceedings of the Falk Symposium 107 on Diseases of the Liver and the Bile Ducts - New Aspects and Clinical Implications', held in Prague, Czech Republic, on April 30-May 2, 1998, brings together scientists and clinicians to highlight the most recent advances in molecular biology, physiology, diagnosis and therapy of diseases of the biliary system. World experts cover a broad spectrum of topics from genetic tests to endoscopy and from medical treatment to liver transplantation.

There has been a tremendous amount of scientific progress in our understanding of the molecular mechanisms of transport processes in the liver within the last few years. Cloning of various members of organic anion and cation transporters has provided the necessary tools to study their regulation under physiological and pathophysiological conditions and has advanced our knowledge about bile formation. Mutations of various hepatic organic anion transporters have been identified in humans as hereditary defects leading to the heterogenous syndrome of progressive familial intrahepatic cholestasis (PFIC). Various mouse models including knockout animals have given us the opportunity to gain insight into lipid transport by the liver and the genetics of cholesterol gallstone formation. The physiology of bile duct cells and the molecular mechanisms leading to various cholangiopathies have been a main scientific focus in hepatology in recent years. Drug targeting to the liver by hepatic organic anion transporters represents an attractive way of selective delivery of pharmaceutical agents in humans. Ursodeoxycholic acid is successfully used in the treatment of patients with chronic cholestatic liver disease and major advances have been made in understanding its mode of action in liver and bile duct cells. This book, the proceedings of the Falk Workshop held in Aachen, Germany, on 25-26 January 2001, contains chapters on all important aspects of biliary transport by well-known experts in this field. It is an essential resource for new developments in the field of biliary transport, both in basic science and clinical medicine.

Recent advances in molecular biology have shown GTPases and phosphoproteins to be the paramount molecular switches uti- lized intracellularly in biological systems. The origins of the GTPase switch appear to be almost as ancient as life it- self, and through evolution nature has adapted this switch to a variety of purposes. In this two-volume work a broad survey of the major classes of GTPases is presented. The role of GTPases in ensuring ac- curacy during protein translation, a new look at the trimeric G-protein cycle, the molecular function of ARF in vesicle coating, the emerging role of the dynamin family in vesicle transfer, GTPases which activate GTPases during nascent protein translocation, and the many roles of ras-related proteins in growth, cytoskeletal polymerization, and vesicle transfer, are all described in 80 chapters by the leading authorities in their fields. Both detailed knowledge of specific systems or proteins and general principles of structure and function are offered. Much of this information has never been published before. At the rate the extended family of GTPases is growing it becomes increasingly unlikely that we will again get it to sit for a group portrait such as this. Therefore, the volume has the chance to become t h e reference work for GTPases.