Formation Archives - Telomere Science https://www.telomehealth.com/category/formation/ Interesting things about telomere Fri, 18 Jul 2025 12:47:28 +0000 en-US hourly 1 https://wordpress.org/?v=6.0.1 https://www.telomehealth.com/wp-content/uploads/2022/07/cropped-logo-32x32.png Formation Archives - Telomere Science https://www.telomehealth.com/category/formation/ 32 32 Friendship and Family: How Strong Social Bonds Protect Your Very DNA https://www.telomehealth.com/friendship-and-family-how-strong-social-bonds-protect-your-very-dna/ Fri, 18 Jul 2025 12:47:25 +0000 https://www.telomehealth.com/?p=209 We have always known, on an intuitive level, that our relationships are vital to our well-being. A call with a close friend can lift our…

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We have always known, on an intuitive level, that our relationships are vital to our well-being. A call with a close friend can lift our spirits after a difficult day; a hug from a family member can make us feel safe and secure. For centuries, we’ve treated this as a purely emotional or psychological phenomenon. But groundbreaking research at the intersection of genetics, sociology, and endocrinology is revealing a stunning truth: the quality of our social connections is written directly into our biological code. Strong, supportive relationships don’t just make us feel good; they actively protect our DNA from the ravages of stress and time, directly influencing the pace at which we age.

The story of how this happens is not one of magic, but of intricate biology. It revolves around the constant battle being waged inside our cells between damaging forces and protective mechanisms. At the heart of this battle are our telomeres—the protective caps at the ends of our chromosomes. Think of them as the plastic tips on a shoelace that prevent it from fraying. Every time a cell divides, these telomeres get a little shorter. When they become too short, the cell can no longer divide safely, leading it to enter a state of senescence or “zombie” status, which contributes to aging and disease. The length of our telomeres, therefore, is a powerful biomarker of our biological age, as opposed to our chronological one. And the single most potent environmental factor influencing the speed of their shortening is chronic stress.

The Biology of Loneliness vs. The Chemistry of Connection

When we experience loneliness, social isolation, or conflict-ridden relationships, our body perceives it as a threat. This triggers the classic “fight-or-flight” response, flooding our system with stress hormones like cortisol. While useful in short bursts, chronic elevation of cortisol is profoundly damaging at a cellular level. It generates a state of oxidative stress, where unstable molecules called free radicals roam our system, damaging DNA, proteins, and cell membranes. Furthermore, it promotes systemic inflammation, another key driver of cellular aging and telomere attrition. In essence, a life of social disconnection puts your cells in a constant state of high alert, accelerating the fraying of your genetic shoelaces.

Conversely, strong social bonds do more than just prevent this negative cascade; they initiate a powerful, protective chemical response. When we engage in positive social interactions—a deep conversation, a shared laugh, physical touch—our brain releases oxytocin. Often called the “bonding hormone” or “cuddle hormone,” oxytocin is a direct antagonist to cortisol. It lowers blood pressure, reduces anxiety, and actively suppresses inflammation. It fosters feelings of trust, empathy, and security, effectively signaling to your body that it is safe. This chemical shift from a threat response to a safety response provides the ideal environment for cellular preservation. Your cells exit their defensive crouch, allowing resources to be allocated toward maintenance and repair rather than emergency preparedness. This hormonal shield created by connection is one of nature’s most elegant anti-aging strategies.

Building Your Biological Safety Net

Understanding this science moves the concept of “spending time with loved ones” from a pleasant pastime to a non-negotiable act of biological self-care. It’s a form of preventative medicine with no negative side effects. The key, however, is not just the quantity of social interactions, but their quality. A large network of superficial acquaintances will not provide the same DNA-protecting benefits as a small circle of trusted confidants. The body knows the difference between a genuine connection and a performative one.

So, how can you consciously cultivate the kinds of relationships that shield your cells? It involves intentional effort focused on creating authentic bonds.

  • Prioritize Quality Over Quantity: Focus on nurturing a few deep, reciprocal relationships where you feel seen, heard, and valued. It’s the depth of the connection, not the size of your social network, that releases protective neurochemicals.
  • Practice Presence and Active Listening: When you are with someone, be fully there. Put away distractions and listen to understand, not just to respond. This practice builds the trust and intimacy that are foundational to a strong bond.
  • Embrace Shared Vulnerability: True connection is forged not just in shared joy, but in shared struggles. Being able to be vulnerable with someone—and having them be vulnerable with you—is one of the most powerful signals of psychological safety, which translates directly to cellular safety.
  • Schedule Connection: In our busy lives, what isn’t scheduled often doesn’t happen. Treat your key relationships with the same importance as a work meeting or a gym session. Make regular, dedicated time for the people who matter most.

Your relationships are far more than a source of emotional comfort. They are a dynamic, living system that communicates directly with your cells. Every act of kindness, every moment of shared laughter, and every deep conversation is a deposit into your biological bank account, fortifying your DNA against the inevitable stresses of life. By consciously investing in your social bonds, you are engaging in one of the most powerful health interventions available—one that ensures your journey through time is not just longer, but healthier, right down to your very chromosomes.

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Can Mindful Gamblers Protect Their Telomeres? The Power of Stress Management in High-Pressure Situations https://www.telomehealth.com/can-mindful-gamblers-protect-their-telomeres-the-power-of-stress-management-in-high-pressure-situations/ Fri, 18 Jul 2025 12:46:26 +0000 https://www.telomehealth.com/?p=205 At the very ends of our chromosomes are structures known as telomeres, which function as guardians for our genetic code, much like how a book’s…

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At the very ends of our chromosomes are structures known as telomeres, which function as guardians for our genetic code, much like how a book’s cover protects its pages. Their role is to prevent the vital DNA within from unraveling during the continuous process of cell division. The length of these telomeres serves as a key measure of our cellular age; when they become too short, our vulnerability to degenerative conditions and a reduced lifespan increases. Persistent stress is a primary catalyst for accelerating this shortening process, and the high-stakes environment of gambling is a textbook example of such a potent stressor. This poses a vital query: can one participate in such an intense activity without incurring a severe biological cost? The solution appears to be not in the evasion of stress, but in a fundamental recalibration of our response to it via mindful awareness.

The Cellular Price of the Poker Face

Whether you are winning or losing, the act of gambling triggers a powerful physiological stress response. Your brain doesn’t distinguish between the “good” stress of a potential win and the “bad” stress of a potential loss. It simply perceives a high-stakes, uncertain situation and prepares the body for “fight or flight.” This initiates a cascade of biochemical events, flooding your system with hormones like adrenaline and cortisol.

While this response is useful for escaping immediate danger, its repeated activation during prolonged gambling sessions creates a state of chronic inflammation and oxidative stress. Cortisol, in particular, is toxic to cells in high doses. It generates free radicals that can directly damage DNA and accelerates the rate at which telomeres shorten. This process happens silently, beneath the surface of the conscious excitement. The poker face may project an image of calm, but inside, a biological storm may be raging, chipping away at the very structures that protect your genetic integrity. This cellular cost is incurred regardless of financial outcome; your biology is paying a tax on the thrill itself.

Mindfulness as a Biological Shield

Here, mindfulness emerges not as a philosophical abstraction, but as a tangible neurobiological tool. At its core, mindfulness is the cultivated skill of maintaining present-moment awareness, deliberately and without passing judgment on the experience. Rather than being pulled into the vortex of reactive emotions that gambling inevitably provokes, a person practicing mindfulness develops the capacity to witness these internal states from a distance. This disciplined observation forges a crucial cognitive buffer—a space for conscious choice that sits between the external trigger (like a high-stakes wager) and the body’s knee-jerk physiological alarm.

By cultivating this awareness, a mindful gambler can interrupt the hormonal cascade before it gains momentum. Instead of allowing the amygdala—the brain’s primal fear center—to hijack their physiology, they engage the prefrontal cortex, the seat of rational thought and emotional regulation. Consider the intense sensory input of a modern online slot game. The flashing lights, the rapid succession of symbols, the escalating sounds—it’s an environment engineered for high arousal. In a game like Hot Target, for instance, the difference between a player caught in a reactive, stressful loop and a mindful player is profound. The reactive player is on a cortisol rollercoaster, while the mindful player observes the excitement without letting it take over their internal state, thereby protecting their cells from the collateral damage.

This deliberate pivot from panicked reactivity to composed observation triggers a cascade of positive physiological changes. It effectively dials down the body’s alarm system, leading to a stabilized heart rate, decreased output of the stress hormone cortisol, and a dampened inflammatory reaction. In effect, mindfulness functions as a form of cellular armor, enabling you to navigate a stressful event without your cells absorbing the full corrosive impact of the experience.

From High-Stakes to High Awareness: Putting Mindfulness into Play

Applying mindfulness within a high-tension environment like gambling is a competency that can be developed through intentional and consistent training. This approach reframes the activity from being a mere external game of chance to an internal discipline of self-mastery. The objective isn’t to dampen the thrill, but to neurologically separate the feeling of excitement from the harmful physiological reaction that typically accompanies it. Below are several actionable methods that can be deployed:

  • Anchoring with the Breath: This is the most direct and accessible method. In the pauses between plays, consciously take three unhurried breaths, focusing on the physical sensation. This simple, focused action can effectively interrupt the fight-or-flight cascade and return you to a state of present-moment awareness, calming your physiology.
  • Conducting a Physical Check-in: Regularly bring your attention to your physical self. Notice areas of tightness—a rigid jaw, raised shoulders, a rapid pulse. The simple act of acknowledging this tension without criticism often prompts its subconscious release, relaxing your body’s defensive posture.
  • Implementing Strategic Resets: Pre-commit to deliberate downtime by using a timer or a predetermined limit on plays. Physically move away from the game, stretch your body, and rehydrate. This brief, intentional disengagement gives your neurochemistry a crucial chance to return to its natural baseline.

Ultimately, while no strategy can eliminate the inherent risks of gambling, mindfulness offers a powerful tool for mitigating the invisible biological harm. It empowers the individual to take control of their internal environment, even when the external one is chaotic. By choosing to play with awareness, a mindful gambler makes the most important bet of all: a long-term investment in their own cellular health and longevity. The greatest jackpot isn’t financial—it’s emerging from the game with your health, right down to your telomeres, fully intact.

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Influence of Epigenetic Factors on Telomere Shortening https://www.telomehealth.com/influence-of-epigenetic-factors-on-telomere-shortening/ Fri, 13 Jan 2023 12:47:11 +0000 https://www.telomehealth.com/?p=169 Until now, the main marker of aging has been the length of the terminal sections of chromosomes – telomeres. To date, it is clear that…

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Until now, the main marker of aging has been the length of the terminal sections of chromosomes – telomeres. To date, it is clear that short telomeres are a reflection of the low level of the ability of cell systems to repair DNA damage, including telomeres, which corresponds to an increased risk of developing cancer and diseases of the cardiovascular system. According to scientists, this is one of the reasons for body aging.

Causes of Human Aging

Types of aging in the human body are diverse. One such type of aging at the molecular level is telomere shortening. Telomeres are complexes of proteins with RNA that protect the ends of chromosomes. With each cycle of cell division, telomeres are shortened, which leads to “replicative aging” of the cell. Since telomeres shorten during aging in various organs and tissues, their length can be a biomarker of aging. Telomeres are the ends of chromosomes that are thought to have a protective function in chromosomes. Starting from infancy, their sizes are gradually reduced: on average, up to two times by adulthood and up to four by the elderly. According to scientists, this is one of the causes of aging in the body.

Telomeres shorten due to the following factors:

  • unhealthy diet (overabundance of sugar and omega-6 in the diet, the use of processed foods);
  • overeating and excess weight;
  • environmental pollution (chemical, electromagnetic, sound);
  • poor emotional and social relationships with other people;
  • sedentary lifestyle;
  • lack of sleep;
  • constant stress;
  • chronic pain;
  • smoking;
  • insulin resistance;
  • chronic inflammation;
  • vitamin D deficiency.

Another factor that causes the shortening of telomeres, as studies have shown, is infection. In Petteri Ilmonen’s lab, scientists experimentally tested whether Salmonella enterica is the cause of telomere shortening in domesticated wild mice. Mice were challenged several times with five strains of S.enterica over several months. The control group included related mice. A real-time test determined telomere length in white blood cells after infection. The results showed that repeated Salmonella infection causes telomere shortening, especially in males compared to females. Scientists also found that faster telomere shortening increased mortality risk, but these results were not statistically significant.

In people under prolonged stress, telomeres shorten much faster than their peers in a normal situation. The length of telomeres in women experiencing long-term chronic stress is equivalent to that of those who are 10 years older but lead a normal life. Therefore, to prevent cell aging, it is important to keep the body in good shape with the help of physical exercise, learn to manage stress, and lead a healthy lifestyle. Positive emotions and endorphins will also be a good addition to this lifestyle. And even more fun will bring the game to play-fortune.pl/kasyno/wyplacalne-kasyna where bonuses and gameplay will help everyone improve their health and financial condition.

New POI

Now the interests of gerontologists are gradually shifting from telomerase and life extension as such to other biological mechanisms and indicators. If it is impossible to guarantee a person’s lifespan to 100, 120, or 150 years, perhaps there are ways to improve the quality of life in recent years – even if a person lives “only” 80 years. It’s no secret that the last years of life often become a real torment. Many metabolic, autoimmune, malignant, and degenerative diseases develop with age. Of course, many researchers have tried to find a way to prevent this. However, for a long time, the reason for the development of this complex remained unclear.

The main cause of the development of a group of senile pathologies is chronic systemic inflammation that develops with age. Among the many candidates for the role of the causative agent of chronic inflammation, the theory of senescent cells has received the greatest scientific support. In 2011, a breakthrough came in this area when a team led by James Kirkland and Jan van Deursen at the Mayo Clinic showed that deleting cells that carry one of the markers in mice. The so-called p16 protein, involved in cell life cycle control, leads to partial rejuvenation of individuals.

Final Thoughts

Until recently, telomeres were considered the main way to prolong human life. Today, it seems, the “first telomeric winter” is coming: everything that could be done with the help of the “immortality enzyme” has already been done. Telomerase does not point the way to a long life; it only helps us know our limits to understand that the lifespan is between early aging and uncontrolled tumor formation. The attention of scientists is gradually shifting to other ways to combat aging and prolong life. Senescent cells, various diets, and medications – may not fully understand ways to add years to a person. What will happen to the telomere? Perhaps, from hope for humanity, it will turn into a toy for scientists for some time: strange, but in a sense, it is not bad. But for now, recipes for old age should be looked for elsewhere – it could be like climate change, ecology, play-fortune.pl/metody-platnosci/ezeewallet or completely new drugs.Thus, after studying telomeres, scientists can conclude what is necessary for life expectancy: eat right and lead a healthy lifestyle; avoid stressful situations, infections, and obesity; the diet requires a certain amount of vitamins B12, folic acid, B6, E, D and the mineral elements magnesium and zinc. All these factors affect genetics in general and the cell’s lifespan. As mentioned above, a healthy lifestyle is enough to feel young and healthy.

Less speculation would allow it to be again “just” an important element for biological, biochemical, and genetic research. Of course, it is a pity if this road to immortality ends as a dead end. But what can you do: many useful lessons can be learned from the experience with telomerase. In a year or ten, a discovery in the field of chromosomal genetics will explode the scientific world and raise a new wave of interest in telomeres and their features.

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What technologies, other than telomeres, can lead to the abolition of human aging, the real rejuvenation of the body? https://www.telomehealth.com/what-technologies-other-than-telomeres/ Tue, 01 Mar 2022 15:07:00 +0000 https://www.telomehealth.com/?p=102 In simple terms, cryonics is the "preservation" of the human body indefinitely. In simple terms, cryonics is the "preservation of the human body indefinitely,"

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Cryonics
In simple terms, cryonics is the “preservation” of the human body indefinitely. In simple terms, cryonics is the “preservation of the human body indefinitely,” in order to unfreeze and revive it in the future. In the light of our topic, cryonics is interesting because it will allow us to pause diseases that modern medicine is not yet able to fight, but will probably find a solution in the future.

How does the “freezing” process work? Through perfusion – the process of replacing blood in the body with a non-freezing solution – a cryoprotectant that prevents cellular damage when frozen. The substance is injected into the person immediately after death is fixed, after which the body is frozen to liquid nitrogen temperature – minus 196˚C – and stored in Dewar vessels.

In the strict sense, cryonics is not a science, but a field of practice. It arose out of the ideas of cryobiology, which studies the effect of low temperatures on living organisms. Experiments with freezing and thawing certain types of tissues, cells, organs and embryos led to the idea and later to the cryopreservation of the human brain and human beings.

According to the law of accelerated returns (referring to the exponential acceleration of technological progress), medical technologies that can improve biological systems, prevent disease and even reverse aging may appear in the next 30-40 years.

Optimists are confident that these predictions will come true and those who have been frozen in our time will be able to meet people they know, such as their adult grandchildren, and enjoy a healthy life in the distant future.

Biohacking
Biohacking originated in Silicon Valley; literally, the term means hacking the body and implies reaching new levels of physiological and psychological processes in the body.
Adherents of biohacking plan to live as long as possible, refining the mind and body while maintaining and multiplying physical and mental health, youthfulness, awareness and productivity.

In their attempts to break the body, biohackers practice different kinds of fasting, different dietary trends, spiritual practices, regularly submit to all kinds of tests and research, take handfuls of biological supplements and serious medications, undergo experimental and questionable procedures, implant electronic chips and implants, wear especially sensitive hearing aids. And what else is being done… The most desperate do it all at once.

Biohacking is usually not cheap. One of the most famous biohackers, Sergei Fage published an article in which he painted his way to become superhuman. In order to become a perfect version of himself and live longer, he had already spent 200 thousand dollars.
Biohackers practice self-improvement at the genetic level as well. A former NASA employee and head of the startup Odin, Jos Zeiner, injected himself with an injection that should insert the superpower genes into his DNA. The biohacker claimed that in six months or a little more he would gain incredible muscle mass.

At the end of March 2017, the public was excited by the news about the new brainchild of inventor and businessman Ilon Musk: he announced the creation of the company Neuralink, which will deal with the technology of direct connection of the human brain with the computer.
The “electronic lace” technology (neural lace), according to the founder of Tesla and SpaceX, will allow a person to receive any information from the Internet and transmit messages to a computer without any physical interaction with it. Work on such an interface began in 2016.

Avatar
Can a person become immortal? In 2013 in New York at the Global Future conference, this question was stated in the international Avatar project.

The authors of the project of unlimited extension of human life offered not a new remedy Macropoulos, not the secrets of immortality worms-planarium and not even a super diet, but very real achievements of neurotechnology and computer technology.

Tens of millions of people already live among us with artificial artificial hips and knees, implanted pacemakers, and brain-implanted electrodes for epilepsy and Parkinson’s disease treatment. The gradual replacement of failing human organs with their artificial counterparts is quite realistic in the coming decades.

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Basic principles of telomere biology https://www.telomehealth.com/basic-principles-of-telomere-biology/ Mon, 14 Feb 2022 15:01:00 +0000 https://www.telomehealth.com/?p=99 Telomeres play a vital role in many cellular processes because they protect chromosomes from end-to-end fusions and chromosomal instability ( Aksenova and Mirkin, 2019 ).

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Telomeres play a vital role in many cellular processes because they protect chromosomes from end-to-end fusions and chromosomal instability ( Aksenova and Mirkin, 2019 ). The repetitive TTAGGG sequences that make up telomeric DNA are bound by a protective protein complex called Shelterin. This complex, together with proteins involved in chromatin remodeling, forms the structure of telomeres, thereby protecting the ends of chromosomes ( Tomita, 2018 ). Two key features of telomeres are the formation of DNA loops at the ends of chromosomes (T-loops) and transcription of telomeres to form G-rich RNA (TERRA). In the t-loop structure, the 3′-end of the G-rich strand protrudes as a single-stranded protrusion known as the G-loop ( Turner et al., 2019). This protruding end of the G strand curls backward, forming a T-loop, and intrudes into the 5′-duplex of the double-stranded telomere duplex, thereby forming the so-called D-loop. This structure ensures the placement of free DNA ends within the nucleoprotein structure ( Turner et al., 2019 ). The formation of such loop structures is an important mechanism that protects telomeres from premature degradation. Despite their heterochromatin state, telomeres are able to be actively transcribed, resulting in the production of long noncoding RNAs called TERRA (telomere repeats containing RNA). TERRA molecules play crucial roles in telomere biology, including regulation of telomerase activity and heterochromatin formation at the ends of chromosomes ( Bettin et al., 2019 ; Lalonde and Chartrand, 2020 ).

In each division cycle of a somatic cell, telomeres are shortened by 50-200 bp due to incomplete synthesis of the lagging strand during DNA replication ( Srinivas et al., 2020 ). This is due to the inability of DNA polymerase to completely replicate the 3′-end of the DNA chain (a phenomenon commonly referred to as the “end replication problem”) ( Watson, 1972 ; Olovnikov, 1973 ). Moreover, since the G-rich telomere repeat sequence is known to be very susceptible to oxidative damage ( Oikawa and Kawanishi, 1999 ), telomeres can be directly damaged by oxidative stress, leading to cell aging ( Barnes et al., 2019.). Given this, it has recently been suggested that telomere-induced aging of postmitotic cells may be a key factor in aging ( von Zglinicki et al., 2020 ).

In culture, somatic cells have a limited replication potential, reaching a point in time when cell division ceases. This point in time is characterized by the shortening (“depletion”) of certain telomeres to a critical size incompatible with their function, leading to cell cycle arrest and cell aging. Therefore, TL is thought to limit the number of cell divisions and act as a “mitotic clock” in the cell ( Olovnikov, 1996 ), and telomere shortening may cause a decrease in proliferative potential and be a marker of cellular aging ( Liu et al., 2019a). In multicellular organisms, TLs are very heterogeneous in different tissues and cell types, depending at least in part on the rate of tissue-specific proliferation, but they generally tend to decrease with age in all proliferating tissues ( Demanelis et al., 2020 ).

The size of critically short (“unclosed”) telomeres can be stabilized by telomerase, a reverse transcriptase enzyme that can lengthen the ends of chromosomes de novo . The two major components of human telomerase are telomerase reverse transcriptase (TERT) and telomerase RNA-component (TERC), which serve as the matrix for telomere elongation (Rubtsova and Dontsova, 2020). In humans, this enzyme is known to be expressed early in intrauterine development, is inactivated in most adult cells except germline cells, embryonic stem cells, and immune cells, and is reactivated in most cancers ( Shay and Wright, 2019 ) .) Telomerase has been shown to be insufficient to maintain normal TL even in proliferating stem cells that can express it; consequently, these cells also experience gradual telomere shortening ( Lai et al., 2018 ; Celtikci et al., 2020 ) ( Figure 1 ) . Since most human somatic cells have low or no telomerase activity, this leads to age-related telomere erosion and related pathological processes. Thus, telomerase activation is considered by some authors as a promising therapeutic method for the treatment of degenerative aging disorders (Bernardes de Jesus and Blasco, 2011 ; Prieto-Oliveira, 2020). However, although telomerase does have potential in anti-aging medicine, the fact that it is overexpressed in approximately 90% of human cancers raises doubts about the applicability of telomerase activators in clinical practice (Smith-Sonneborn, 2020).

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History of telomere studies https://www.telomehealth.com/history-of-telomere-studies/ Sat, 14 Mar 2020 14:56:00 +0000 https://www.telomehealth.com/?p=96 German zoologist Friedrich Leopold August Weismann in 1889 in his work "Essays on Heredity and Relatedness of Biological Problems" for the first time tried to explain the problem of aging from a scientific point of view.

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German zoologist Friedrich Leopold August Weismann in 1889 in his work “Essays on Heredity and Relatedness of Biological Problems” for the first time tried to explain the problem of aging from a scientific point of view.

А. Weismann considered aging to be the result of evolution: “…non-aging organisms are not only not useful, but also harmful, since they take the place of young ones”, which is why, in his opinion, evolution leads living organisms to aging.

The idea of aging as a result of evolution was debunked by English biologist Sir Peter Brian Medawar in 1951 in a report to the Royal Society of London entitled An Unresolved Problem in Biology. He noted that animals in nature rarely live to old age, so the course of evolution has no effect on the aging process.

In 1960, Medawar, together with the Australian virologist Sir Frank Macfarlane Burnet, received the Nobel Prize in Physiology or Medicine “for the discovery of artificial immune tolerance”, but they could not explain anything specific about the causes of aging. The deciphering of DNA structure in 1953 did little to clarify either, only posing even more questions to scientists with many unknowns.

British biologist Francis Crick, American biologist James Dewey Watson and British-New Zealand scientist Maurice Hugh Frederick Wilkins were credited with deciphering the structure of DNA in 1962.

In those years, scientists were inclined to believe that the human cell was capable of proliferation in the body and could reproduce indefinitely in culture. If this were true, it would mean that people age and die not according to the program of cellular degradation, but due to extracellular processes occurring at a higher physiological level (Kvitko A.V., Koneva I.I. et al., 2000).

Only forty years later scientists began to approach more or less general views on the theory of aging. In 1961, the American scientist Leonard Hayflick, professor of anatomy at the University of California in San Francisco, discovered that even in ideal conditions the cell is capable of dividing only a limited number of times, and that as this limit is reached, the signs of aging appear. Hayflick L., Moorhead PS, 1961).

The division limit is established for cells of almost all multicellular organisms. The greatest number of divisions depends on the type of cell and on the organism. It was found that for most human cells this limit is 52 divisions. It was also found that as the age of the donor increases, the number of divisions decreases significantly.

That is, in the body of any living being there is something like a “biological clock”, a division counter that sets a limit on the total number of cells (Hayflick L., 1998). This limit is called the Hayflick limit.

How does this “counter” work? In 1971, the Soviet scientist Alexey Olovnikov, based on data on the principles of DNA synthesis in cells, proposed the theory of marginotomy (the theory of marginotomy), explaining the mechanism of such a “counter”. According to Olovnikov, during matrix synthesis of polynucleotides DNA polymerase is unable to fully reproduce the linear matrix; the replica comes out always shorter than its initial part. Thus, with each cell division the DNA is shortened, which limits the proliferative potential of the cells and seems to be the “counter” of the number of cell divisions (Olovnikov AM, 1971).

In the late 1980s, a series of discoveries by scientists Elizabeth H. Blackburn, Jack W. Szostak, and Carol W. Greider confirmed Olovnikov’s hypothesis. It was these three scientists who were awarded the Nobel Prize in Physiology or Medicine in 2009. They managed to figure out the mechanism by which chromosomes are copied completely during cell division, that is, somehow the chromosomes are protected from degradation.

The solution was found at the ends of the chromosomes: the telomere (from the Greek Telos – end and meros – part, a name suggested by Herman Joseph Meller in 1932) and the enzyme that forms the telomere, telomerase. The long spirals of DNA molecules carrying gene information are packed into chromosomes that have telomeres, protective caps, at their ends.

It has been found that the shorter the telomere, the older the cell, and vice versa, if telomerase activity is high, the same telomere length is constantly maintained – the cell does not age, but there is a danger of cancer cells developing, also striving for immortality. Certain hereditary diseases are characterized by the presence of defective telomerase, which leads to rapid aging of the cell. The mysterious telomere of a chromosome contains a genome, the carrier of which is a DNA molecule.

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