{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,28]],"date-time":"2026-07-28T08:03:33Z","timestamp":1785225813734,"version":"3.55.0"},"reference-count":161,"publisher":"MDPI AG","issue":"15","license":[{"start":{"date-parts":[[2026,7,23]],"date-time":"2026-07-23T00:00:00Z","timestamp":1784764800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Int. J. Mol. Sci.","IJMS"],"abstract":"<jats:p>Oxidative stress is a key player in the pathogenesis of aging and various neurodegenerative disorders, including Alzheimer\u2019s disease (AD), Parkinson\u2019s disease (PD), Huntington\u2019s disease (HD), and multiple sclerosis (MS), among others. Coupled molecules involved in chemical reduction-oxidation (redox) reactions regulate central signaling pathways and ensure the activation of cytoprotective mechanisms as needed. Such redox couples include oxidized and reduced forms of nicotinamide adenine dinucleotide (NAD+\/NADH), nicotinamide adenine dinucleotide phosphate (NADP+\/NADPH), and glutathione (GSSG\/GSH), respectively. Under pathological conditions, concentrations of NAD+, NADPH, and GSH decrease, and an imbalance between the oxidized and reduced forms of these molecules develops. The current review focuses on the mechanisms that underlie these changes and their potential consequences for neurodegenerative processes and aging. The review also evaluates experimental studies on metabolic and genetic abnormalities associated with alterations in NAD+, NADPH, and GSH concentrations and highlights current research on strategies to regulate these compounds for neuroprotective purposes. Special attention is paid to understanding the interconnection between disturbed redox homeostasis and mitochondrial dysfunction, as this crosstalk is increasingly recognized as a crucial step in neurodegeneration. Integration of biochemical, genetic, and therapeutic perspectives provides a comprehensive understanding of redox imbalance in the pathogenesis of aging and neurodegenerative disorders. Therefore, these insights may contribute to the development of innovative interventions that target redox homeostasis, with the potential of increasing the human lifespan.<\/jats:p>","DOI":"10.3390\/ijms27156567","type":"journal-article","created":{"date-parts":[[2026,7,23]],"date-time":"2026-07-23T17:13:17Z","timestamp":1784826797000},"page":"6567","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Redox Molecules in Aging and Neurodegenerative Disorders"],"prefix":"10.3390","volume":"27","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1207-6075","authenticated-orcid":false,"given":"Igor Y.","family":"Iskusnykh","sequence":"first","affiliation":[{"name":"Department of Anatomy and Neurobiology, University of Tennessee Health Science Center, Memphis, TN 38163, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8855-5515","authenticated-orcid":false,"given":"Evgenii D.","family":"Kryl\u2019skii","sequence":"additional","affiliation":[{"name":"Department of Medical Biochemistry, Molecular and Cell Biology, Voronezh State University, Universitetskaya Sq. 1, Voronezh 394018, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9660-3054","authenticated-orcid":false,"given":"Tatyana N.","family":"Popova","sequence":"additional","affiliation":[{"name":"Department of Medical Biochemistry, Molecular and Cell Biology, Voronezh State University, Universitetskaya Sq. 1, Voronezh 394018, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anastasia A.","family":"Zakharova","sequence":"additional","affiliation":[{"name":"Department of Medical Biochemistry, Faculty of Biomedicine, Pirogov Russian National Research Medical University, Ostrovitianov St. 1, Moscow 117997, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,7,23]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"734","DOI":"10.1089\/ars.2015.6247","article-title":"The Redox Code","volume":"23","author":"Jones","year":"2015","journal-title":"Antioxid. 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