TY - JOUR A2 - Korrapati, Sathyasaikumar V. AU - Villanueva, I. AU - Alva-Sánchez, C. AU - Pacheco-Rosado, J. PY - 2013 DA - 2013/12/09 TI - The Role of Thyroid Hormones as Inductors of Oxidative Stress and Neurodegeneration SP - 218145 VL - 2013 AB - Reactive oxygen species (ROS) are oxidizing agents amply implicated in tissue damage. ROS production is inevitably linked to ATP synthesis in most cells, and the rate of production is related to the rate of cell respiration. Multiple antioxidant mechanisms limit ROS dispersion and interaction with cell components, but, when the balance between ROS production and scavenging is lost, oxidative damage develops. Many traits of aging are related to oxidative damage by ROS, including neurodegenerative diseases. Thyroid hormones (THs) are a major factor controlling metabolic and respiratory rates in virtually all cell types in mammals. The general metabolic effect of THs is a relative acceleration of the basal metabolism that includes an increase of the rate of both catabolic and anabolic reactions. THs are related to oxidative stress not only by their stimulation of metabolism but also by their effects on antioxidant mechanisms. Thyroid dysfunction increases with age, so changes in THs levels in the elderly could be a factor affecting the development of neurodegenerative diseases. However, the relationship is not always clear. In this review, we analyze the participation of thyroid hormones on ROS production and oxidative stress, and the way the changes in thyroid status in aging are involved in neurodegenerative diseases. SN - 1942-0900 UR - https://doi.org/10.1155/2013/218145 DO - 10.1155/2013/218145 JF - Oxidative Medicine and Cellular Longevity PB - Hindawi Publishing Corporation KW - ER -