Browsing by Author "Raj, Neethu"

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    Assessment of tRNAThr and tRNAGln Variants and Mitochondrial Functionality in Parkinson�s Disease (PD) Patients of Tamil Nadu Population
    (Springer, 2023-10-17T00:00:00) Venkatesan, Dhivya; Iyer, Mahalaxmi; Raj, Neethu; Gopalakrishnan, Abilash Valsala; Narayanasamy, Arul; Kumar, Nachimuthu Senthil; Vellingiri, Balachandar
    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. � 2023, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.
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    Role of Telomeres and Telomerase in Parkinson's Disease�A New Theranostics?
    (John Wiley and Sons Inc, 2023-08-21T00:00:00) Vellingiri, Balachandar; Balasubramani, Kiruthika; Iyer, Mahalaxmi; Raj, Neethu; Elangovan, Ajay; Song, Kwonwoo; Yeo, Han-Cheol; Jayakumar, Namitha; Kinoshita, Masako; Thangarasu, Ravimanickam; Narayanasamy, Arul; Dayem, Ahmed Abdal; Prajapati, Vijay Kumar; Gopalakrishnan, Abilash Valsala; Cho, Ssang-Goo
    Parkinson's disease (PD) is a complex condition that is significantly influenced by oxidative stress and inflammation. It is also suggested that telomere shortening (TS) is regulated by oxidative stress which leads to various diseases including age-related neurodegenerative diseases like PD. Thus, it is anticipated that PD would result in TS of peripheral blood mononuclear cells (PBMCs). Telomeres protect the ends of eukaryotic chromosomes preserving them against fusion and destruction. The TS is a normal process because DNA polymerase is unable to replicate the linear ends of the DNA due to end replication complications and telomerase activity in various cell types counteracts this process. PD is usually observed in the aged population and progresses over time therefore, disparities among telomere length in PBMCs of PD patients are recorded and it is still a question whether it has any useful role. Here, the likelihood of telomere attrition in PD and its implications concerning microglia activation, ageing, oxidative stress, and the significance of telomerase activators are addressed. Also, the possibility of telomeres and telomerase as a diagnostic and therapeutic biomarker in PD is discussed. � 2023 Wiley-VCH GmbH.