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Browsing Articles by Subject "aging"

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    THE EVALUATION OF CHROMOSOME TELOMERE LENGTH CHANGE AS A CRITERION OF LIFE EXPECTANCY IN BARIATRIC PRACTICE
    (Ожирение и метаболизм / Obesity and metabolism, 2020) Bekmurzinova, Farida K.; Ospanov, Oral B.; Akilzhanova, Ainur R.; Kozhamkulov, Ulan A.; . Rakhimova, Saule E
    In recent decades, the prevalence of obesity has been steadily increasing in most countries of the world. Overweight is a risk factor for a wide range of endocrine, cardiovascular, gastrointestinal, metabolic, neoplastic and musculoskeletal disorders and diseases. As you know, obesity is a state of chronic inflammation and severe oxidative stress, which will certainly affect the length of the chromosome telomeres. The dynamics of telomere length changes plays a decisive role in the regulation of cellu lar processes and cellular changes. Damage to telomeres, chromatin structures that help maintain the stability of the genome, leads to cell death or aging. However, information on how telomere length changes after weight loss through bariatric surgery remains limited to date. There are several types of bariatric surgery, each of which has its advantages and disadvantages. Based on this, it is possible that the restoration of the telomere length will differ depending on the technique used. This review de scribes the mechanisms for shortening leukocyte telomeres, and how bariatric surgery can affect this. The review also includes an analysis of evidence linking obesity and accelerated aging processes, as they are regulated by telomeres
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    POLYPHENOLS AS CALORIC-RESTRICTION MIMETICS AND AUTOPHAGY INDUCERS IN AGING RESEARCH
    (MDPI, 2020-05-08) Yessenkyzy, Assylzhan; Saliev, Timur; Zhanaliyeva, Marina; Masoud, Abdul-Razak; Umbayev, Bauyrzhan; Sergazy, Shynggys; Krivykh, Elena; Gulyayev, Alexander; Nurgozhin, Talgat
    It has been thought that caloric restriction favors longevity and healthy aging where autophagy plays a vital role. However, autophagy decreases during aging and that can lead to the development of aging-associated diseases such as cancer, diabetes, neurodegeneration, etc. It was shown that autophagy can be induced by mechanical or chemical stress. In this regard, various pharmacological compounds were proposed, including natural polyphenols. Apart from the ability to induce autophagy, polyphenols, such as resveratrol, are capable of modulating the expression of pro- and anti-apoptotic factors, neutralizing free radical species, affecting mitochondrial functions, chelating redox-active transition metal ions, and preventing protein aggregation. Moreover, polyphenols have advantages compared to chemical inducers of autophagy due to their intrinsic natural bio-compatibility and safety. In this context, polyphenols can be considered as a potential therapeutic tool for healthy aging either as a part of a diet or as separate compounds (supplements). This review discusses the epigenetic aspect and the underlying molecular mechanism of polyphenols as an anti-aging remedy. In addition, the recent advances of studies on NAD-dependent deacetylase sirtuin-1 (SIRT1) regulation of autophagy, the role of senescence-associated secretory phenotype (SASP) in cells senescence and their regulation by polyphenols have been highlighted as well. Apart from that, the review also revised the latest information on how polyphenols can help to improve mitochondrial function and modulate apoptosis (programmed cell death).