APP (Amyloid Precursor Protein): APP is a measure that reflects the role of a key transmembrane protein involved in various cellular processes, particularly within the central nervous system. APP is crucial for neuronal development, synaptic plasticity, and cell signalling. Its processing generates amyloid-beta peptides, which are associated with the onset of Alzheimer's disease. Proper regulation of APP processing and amyloid-beta production is vital for maintaining neuronal health and cognitive function, whereas dysregulation may contribute to Alzheimer's pathology.