Part I. Cancer.- Ubiquitin-Regulated Cell Proliferation and Cancer.- Ubiquitin, SUMO, and Nedd8 as Therapeutic Targets in Cancer.- The Proteasome System in Health and Disease.- Proteostasis Dysregulation in Pancreatic Cancer.- Divergent Modulation of Proteostasis in Prostate Cancer.- Resistance to the Proteasome Inhibitors: Lessons from Multiple Myeloma and Mantle Cell Lymphoma.- Part II. Neurodegeneration.- Altered Proteostasis in Neurodegenerative Tauopathies.- The Ubiquitin System in Alzheimer's Disease.- The Interplay Between Proteostasis Systems and Parkinson's Disease.- Machado-Joseph Disease: A Stress Combating Deubiquitylating Enzyme Changing Sides.- Part III. Infection, In¿ammation and Developmental Disorders.- SUMO and Cytoplasmic RNA Viruses: From Enemies to Best Friends.- The Role of Proteostasis in the Regulation of Cardiac Intercellular Communication.- By the Tips of Your Cilia: Ciliogenesis in the Retina and the Ubiquitin-Proteasome System.- TRIME3 Ubiquitin Ligases in Rare Genetic Disorders.- Part IV. Diet.- We Are What We Eat: Ubiquitin-Proteasome System (UPS) Modulation Through Dietary Products.