Abstract
Parkinson’s disease (PD) is speculated with genetic and environmental factors. At molecular level, the mitochondrial impact is stated to be one of the causative reasons for PD. In this study, we investigated the mitochondrial membrane potential (MMP), reactive oxygen species (ROS) and adenosine triphosphate (ATP) levels along with mitochondrial tRNA alterations among three age categories of PD. By determining the genetic and organellar functionality using molecular techniques, the ROS levels were reported to be high with decreased MMP and ATP in the late-onset age group than in other two age categories. Likewise, the tRNA significancy in tRNAThr and tRNAGln was noticed with C4335T and G15927A mutations in late-onset and early-onset PD groups respectively. Therefore, from the findings, ageing has shown a disruption in tRNA metabolism leading to critical functioning of ATP synthesis and MMP, causing oxidative stress in PD patients. These physiological outcomes show that ageing has a keen role in the divergence of mitochondrial function, thereby proving a correlation with ageing and maintenance of mitochondrial homeostasis in PD.
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Acknowledgements
The authors would like to thank Indian Council of Medical Research (ICMR) [grant number: 45/2/2018-Hum/BMS], Government of India and Bharathiar University, Coimbatore to carry out this research work. Also, I would like to thank Karpagam Academy of Higher Education (Deemed to be University), Coimbatore 641021, India, for the revision of the manuscript.
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This work was supported by the Indian Council of Medical Research [grant number: 45/2/2018-Hum/BMS], Government of India.
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All authors contributed to the study conception and design. Material preparation, data collection, and analysis were performed by Dhivya Venkatesan, Mahalaxmi Iyer, and Neethu Raj. The first draft of the manuscript was written by Dhivya Venkatesan and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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This study was performed in line with the principles of the Declaration of Helsinki. Approval was granted by the Ethics Committee of Bharathiar University (BUHEC-0014/2018; dated: 10.08.2018)
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Venkatesan, D., Iyer, M., Raj, N. et al. Assessment of tRNAThr and tRNAGln Variants and Mitochondrial Functionality in Parkinson’s Disease (PD) Patients of Tamil Nadu Population. J Mol Neurosci 73, 912–920 (2023). https://doi.org/10.1007/s12031-023-02154-7
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DOI: https://doi.org/10.1007/s12031-023-02154-7