Abstract
Parkinson's disease (PD) is a neurodegenerative disease with severe movement problems. Current treatments mainly focus on symptom management by reducing dopaminergic pathways in the brain. Despite these therapies, ongoing disease progression undermines the effectiveness of prevalent approaches, necessitating exploring alternative methods anchored on genetic factors, notably the leucine-rich repeat kinase 2 (LRRK2) gene. Exploring LRRK2 gene pathogenesis has highlighted various mechanisms that may contribute to treating PD, including protein accumulation, altered cytoskeletal dynamics, neuro-inflammation, autophagy, and mitochondrial dysfunction. Based on the findings, there is an actual correlation between elevated levels of LRRK2 and the biomarkers and assays of PD. Furthermore, research results have suggested inhibiting LRRK2 as a therapeutic intervention targeting pathogenic mechanisms with varying degrees of efficacy. Our review wants to understand how LRRK2 works in the body and its relationship with the occurrence of PD by providing biochemical evidence, LRRK2 gene mutations and pathology, and the role of this gene in the immune system. We also discuss targeted therapies such as kinase inhibitors and Proteolysis targeting chimera and the application of using the LRRK2 protein to diagnose PD and develop bioassay designs. Finally, we mention the clinical trials conducted and the challenges and safety required.