Mitigation of Neuroinflammation and Oxidative Stress in Rotenone-Induced Parkinson Mouse Model through Liposomal Coenzyme-Q10 Intervention: A Comprehensive In-vivo Study.

Abstract

Parkinson's disease (PD) stands as the sec most prevalent incapacitating neurodegenerative disorder characterized by deterioration of dopamine-producing neurons in the substantia nigra. Coenzyme Q10 (CoQ10) has garnered attention as a potential antioxidant, anti-inflammatory agent and enhancer of mitochondrial complex-I activity. This study aimed to examine and compare the effectiveness of liposomal and non-encapsulated CoQ10 in rotenone induced-PD mouse model over a 21-day treatment duration. 30 mice were divided into 5 equal groups: Group I (mice receiving normal saline), Group II (rotenone was administered to mice), Group III (standard CoQ10 was given to mice), Group IV (mice were treated with non-encapsulated CoQ10) and Group V (mice were treated with CoQ10 Liposomes). Motor performance, the preservation of dopaminergic neurons, levels of neuroinflammation, oxidative stress, neurotransmitter levels, RT-qPCR analysis of PD-linked genes and histopathology were evaluated. The Liposomal CoQ10 group exhibited superior outcomes in behavioral tests such as reduced anxiety in the open field test, enhanced balance and coordination in beam balance test and improved cognitive performance in Y-maze test. Liposomal Coenzyme Q10 displayed pronounced antioxidative effects, evidenced by a significant (p < 0.001) increase in superoxide dismutase (SOD), catalase (CAT), and glutathione (GSH) activities. In contrast, the non-encapsulated CoQ10 group showed a delayed response in mitigating the inflammation and oxidative stress. CoQ10 Liposomes demonstrated superior efficacy (p < 0.0001) in restoring dopamine and noradrenaline levels, reducing acetylcholinesterase activity, and downregulating Synuclein Alpha (SNCA) gene expression (0.722-fold change) compared to oral CoQ10, highlighting its potential in suppressing PD symptoms. The results of this study indicated that the liposomal CoQ10 effectively averted motor impairments, memory lapses, oxidative stress, as well as neuroinflammation triggered by rotenone.