Research explores the mechanisms of AAV (adeno-associated virus) gene therapy in Huntington’s disease. It demonstrates that AAV vector-mediated therapy reduces levels of mutant huntingtin protein in disease models, leading to functional improvements and molecular benefits such as transcriptional correction and activation of metabolic pathways. The study reviews preclinical research showing varying effects on motor coordination and cognitive performance, with sustained molecular benefits lasting up to 12 months. Additionally, it outlines the criteria used to screen and analyze relevant studies, focusing on those specifically investigating AAV-based interventions for Huntington’s disease.