Aging and Neurodegeneration

Neurodegenerative diseases mainly develop from aging processes since they represent the primary risk factor and these conditions progress through large-scale cell and molecular damage which triggers decreasing mental and motor function ability. Neural damage becomes worse because oxidative stress produces excessive reactive oxygen species (ROS) that break lipid structures and harm DNA while triggering protein misfolding. Patients with mitochondrial disorders experience negative consequences in neurodegeneration because their condition reduces cellular energy and generates elevated oxidative imbalances. Microglia and astrocytes activate their muscle cells to transmit prolonged inflammatory signals until they produce destructive pro-inflammatory cytokines that accelerate brain cell death. The disease indicators of both Alzheimer’s and Parkinson’s develop from amyloid-β and tau, and α-synuclein protein malformation that produces damaging protein clumps, which disrupt brain cell homeostasis and synaptic connections. Multiple disease occurrences initiate neuron apoptotic cell death by destroying vital brain cell connections to cause progressive cognitive decrease. Research into medical treatments explores combined therapy through antioxidants for better oxidative damage reduction together with medications for mitochondria recovery and anti-inflammatory drugs to regulate microglial activation and protein clearance systems. Recombinant empty virus vectors used as delivery vehicles for vaccines contain protective envelope genes that show lower immunological side effects. Studying molecular interactions between pathways will facilitate the creation of appropriate treatments for age-related neurodegenerative diseases.