Section I: Cell and Metabolic Disorders -- Regulation of Liver Growth: Protooncogenes and Transforming Growth Factors -- Mechanism of Mineral Formation in Bone -- Contractile Cells in Normal and Fibrotic Lungs -- Role of Folate Binding Proteins in Folate Metabolism -- New Insights into โ{128}{156}The Riddle of the Mast Cellsโ{128}{157}: Microenvironmental Regulation of Mast Cell Development and Phenotypic Heterogeneity -- Section II: Inflammation and Immunity -- HLA Class II Polymorphism: Implications for Genetic Susceptibility to Autoimmune Disease -- Interleukin 6: A Multifunctional Cytokine Regulating Immune Reactions and the Acute Phase Protein Response -- IgA Nephropathy: Pathogenesis of the Most Common Form of Glomerulonephritis -- Goodpasture Syndrome: Molecular Architecture and Function of Basement Membrane Antigen -- Pathogenesis of Anti-Basement Membrane Glomerulopathy and Immune-Complex Glomerulonephritis: Dichotomy Dissolved -- Section III: Tumor Biology -- Molecular Mechanisms of Oncogenesis -- DNA Repair and Its Pathogenetic Implications -- Molecular Diagnosis of Human Cancer -- Role of Inhibition of Intercellular Communication in Carcinogenesis -- Comparative Study of Human and Rat Mammary Tumorigenesis