TRANSDISCIPLINARY APPROACH IN FREE RADICAL THEORY OF AGING. CONTRIBUTION OF NIKOLAY M. EMANUEL AND HIS SCIENTIFIC SCHOOL TO GERONTOLOGY

Author(s):  
В.Б. Мамаев ◽  
Р.И. Жданов

Работа представляет собой обзор научных исследований влияния антиоксидантов-геропротекторов на старение экспериментальных животных и репликативное старение диплоидных клеток человека, выполненных в отделе кинетики химических и биологических процессов «ХИМБИО» Института химической физики АН СССР под руководством академика Николая Марковича Эмануэля в 1960- 1980- е гг. В работах Н.М. Эмануэля и сотрудников было установлено неизвестное ранее явление взаимодействия ингибиторов свободнорадикальных реакций в процессах окисления органических веществ, заключающееся в регенерации более эффективного ингибитора вследствие переноса атома водорода к его радикалу от молекулы менее эффективного ингибитора. Антиоксиданты поливалентны и могут влиять одновременно на многие процессы старения. Данные научной школы Н.М. Эмануэля по увеличению средней продолжительности жизни на 25,3 % и максимальной продолжительности мышей на 55,8 % под действием антиоксидантов, полученные в результате хорошо обоснованных экспериментальных и теоретических исследований, явились весомым аргументом в пользу свободнорадикальной теории старения. The work is aimed to review the results of scientific studies of the effect of antioxidants-geroprotectors on the aging of experimental animals and the replicative aging of human diploid cells, carried out in the Department of Kinetics of Chemical and Biological Processes «KHIMBIO» of the Institute of Chemical Physics of the USSR Academy of Sciences under the leadership of academician Nikolay Markovich Emanuel in the 1960-1980s after pioneer work by D. Harman. By N.M. Emanuel and colleagues, it was established a previously unknown phenomenon of radical interaction of inhibitors in the oxidation of organic substances, which consists in the regeneration of a more effective inhibitor due to the transfer of a hydrogen atom to its free radical from a molecule of a less effective inhibitor. Antioxidants are polyvalent and can simultaneously affect many stages of aging processes. Data from the N.M. Emanuel scientific school on the increase of the average lifespan of mice by 25,3 % and their maximum lifespan by 55,8 % using antioxidants, discovered at the Institute of Chemical Physics of the USSR Academy of Sciences as a result of well-founded experimental and theoretical studies, became a powerful argument in favor of the free radical theory of aging in 1970-ties. This was further promoted by approaches based on the theory of reliability, the damage theory, and as well as an approach based on oxidative activation of the Nrf2 signaling pathway, which maintains the «nucleophilic tone» of protective oxidoreductases.

2014 ◽  
Vol 3 (1) ◽  
Author(s):  
Jeffrey A Stuart ◽  
Lucas A Maddalena ◽  
Max Merilovich ◽  
Ellen L Robb

2000 ◽  
Vol 10 (3) ◽  
pp. 207-222 ◽  
Author(s):  
Hae Young Chung ◽  
Hyon Jeen Kim ◽  
Kyung Jin Jung ◽  
Ji Sung Yoon ◽  
Mi Ae Yoo ◽  
...  

Aging processes are time-dependent, deteriorative functional changes. These functional changes lead to a progressive loss of the organism’s ability to withstand both internal and environmental stresses, causing the failure of cellular homeostasis. Among the modern hypotheses, the ‘Oxidative Stress Hypothesis’ offers the best mechanistic elucidation of aging phenomena. Based on the ‘Free Radical Theory of Aging’, this hypothesis has gained popularity among researchers in the field of gerontology as well as other biomedical fields. Its primary premise proposes that aging and its related disease processes are the net result of free radical-induced damage, asserting further that an organism’s inability to produce counterbalancing antioxidative defences, i.e. defences that offset disturbances in the redox state, underlies its cause.


2010 ◽  
Vol 2010 ◽  
pp. 1-10 ◽  
Author(s):  
Makoto Suzuki ◽  
D. Craig Willcox ◽  
Matthew W. Rosenbaum ◽  
Bradley J. Willcox

Background. The Free Radical Theory of Aging mechanistically links oxidative stress to aging. Okinawa has among the world's longest-lived populations but oxidative stress in this population has not been well characterized.Methods. We compared plasma lipid peroxide (LPO) and vitamin E—plasma and intracellular tocopherol levels (total α, β, and γ), in centenarians with younger controls.Results. Both LPO and vitamin E tocopherols were lower in centenarians, with the exception of intracellular β-tocopherol, which was significantly higher in centenarians versus younger controls. There were no significant differences between age groups for tocopherol: cholesterol and tocopherol: LPO ratios. Correlations were found between α-Tocopherol and LPO in septuagenarians but not in centenarians.Conclusions. The low plasma level of LPO in Okinawan centenarians, compared to younger controls, argues for protection against oxidative stress in the centenarian population and is consistent with the predictions of the Free Radical Theory of Aging. However, the present work does not strongly support a role for vitamin E in this phenomenon. The role of intracellular β-tocopherol deserves additional study. More research is needed on the contribution of oxidative stress and antioxidants to human longevity.


Author(s):  
Lindy Clemson ◽  
J. Rick Turner ◽  
J. Rick Turner ◽  
Farrah Jacquez ◽  
Whitney Raglin ◽  
...  

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