Tag Archives: aging

Studies Suggest Common Vitamin Supplements May Help Slow Aging

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Recent studies indicate that daily vitamin D intake can assist in managing the effects of aging.

Research has shown that supplementing with vitamin D for four years could potentially offset the aging process by about three years.

Prior studies have suggested that vitamin D supplements may help mitigate some prominent aging signs linked to various age-related diseases, such as cancer, heart disease, and dementia.

To explore this hypothesis, researchers from Mass General Brigham and Georgia Medical University examined the findings of previous trials. In this experiment, over 55 women and more than 50 men participated, taking either Vitamin D, Omega 3, or a placebo daily for five years.

The recent study assessed telomere length, concentrating on 1,054 participants who underwent specific tests at the beginning of the trial, as well as in their second and fourth years.

Telomeres are repetitive DNA sequences that protect chromosomes. Professor Morten Schiebye-Knudsen from the University of Copenhagen, who was not involved in the study, noted in BBC Science Focus Magazine.

Telomeres safeguard chromosome ends and prevent fusion or degradation – Credit: Getty Images/Knopprit

“Consider them like the plastic tips on shoelaces. They prevent chromosomes from fraying and sticking to each other, which helps maintain genetic stability during cell division,” he explained.

With each cell division, telomeres shorten slightly. If they become too short, the cell loses its ability to divide, leading to cell dysfunction.

The study found that participants taking vitamin D exhibited significantly reduced telomere shortening, effectively preventing nearly three years of aging.

This finding could offer valuable insights into promoting longer health spans, as telomere shortening is linked to various age-related diseases.

“I often refer to these cells as angry old men. They lose functionality, become inactive, and worsen over time, negatively impacting their environment,” Schiebye-Knudsen remarked.

“Telomere shortening may lead to older, more dysfunctional cells, resulting in increased inflammation in our bodies, particularly in rapidly dividing cells, like those in bone marrow, skin, and hair.”

About our experts

Morten Schiebye-Knudsen serves as an associate professor at the Faculty of Cellular Molecular Medicine at the University of Copenhagen.

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Source: www.sciencefocus.com

Study: Eating Methyladaptogen-Rich Foods May Lower Epigenetic Aging Indicators

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As we age, the likelihood of developing chronic non-infectious diseases increases, necessitating interventions that target the aging process. One of the measures used to assess biological aging in these interventions is an algorithm that analyzes DNA methylation patterns, referred to as epigenetic clocks. This new research focuses on identifying beneficial nutritional components such as green tea, oolong tea, turmeric, rosemary, garlic, and berries.

Villanueva et al. suggest that targeted food choices may help slow the aging process. Image credit: Sci.News.

“We have observed numerous individuals struggling with their health,” stated Dr. Jamie L. Villanueva, a researcher at Washington University and the National University of Natural Medicine.

“The DNA methylation pattern, which acts as a chemical marker in DNA, can reveal whether a person is aging faster or slower than anticipated.”

“This research employed Horvath’s epigenetic clock, a widely recognized method, to assess changes in epigenetic age.”

Researchers studied healthy men aged 50-72 who had previously undertaken an 8-week program featuring a plant-based, nutritious diet, complemented by guidance on exercise, sleep, and stress management.

The team investigated individual dietary variations to understand why some participants exhibited greater improvements in their epigenetic age compared to others.

The findings showed that participants consuming higher amounts of methyladaptogenic foods—like turmeric, rosemary, garlic, berries, green tea, and oolong tea—experienced a notable reduction in their epigenetic age.

These positive effects remained significant even after accounting for weight changes and initial epigenetic ages, indicating a direct impact of the foods on aging markers.

“In hierarchical linear regression analyses, foods assessed as polyphenol modulators of DNA methylation, previously categorized as methyladaptogens, demonstrated a significant linear association with changes in epigenetic age after controlling for baseline epigenetic age acceleration and alterations in body weight,” the researchers explained.

The natural compounds in methyladaptogenic foods are known to influence gene behavior through their effects on DNA methylation.

Prior research has indicated that these compounds may support healthy aging and lower the risk of conditions like heart disease and cognitive decline.

Though this study involved a relatively small cohort of middle-aged men, it contributes to the expanding body of global research suggesting that diets rich in polyphenols found in vegetables, fruits, and tea are linked to slower aging.

The results reinforce previous studies on Mediterranean and traditional Japanese diets, renowned for their health benefits.

“Future studies should involve a larger and more diverse population and explore these findings using updated tools for measuring epigenetic aging,” the author noted.

“Based on current findings, this study underscores practical, food-based strategies that can help mitigate epigenetic aging and promote long-term health.”

Study published in the journal aging.

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Jamie L. Villanueva et al. 2025. Dietary relationships with epigenetic age decline: secondary data analysis of methylated diet and lifestyle studies. aging 17(4):994-1010; doi:10.18632/aging.206240

Source: www.sci.news

Key Elements of Dark Chocolate Might Promote Healthy Aging

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                    <p class="ArticleImageCaption__Title">Dark chocolate is a notable source of theobromine, a beneficial chemical</p>
                    <p class="ArticleImageCaption__Credit">Studio-N/Shutterstock</p>
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    <p>While chocolate may be associated with anti-aging benefits, it’s wise to be cautious before indulging. The beneficial compounds are predominantly found in dark chocolate, and the overall health impact of chocolate consumption remains uncertain.</p>
    <p>"There are numerous aspects of dark chocolate, each with its pros and cons," says <a href="https://profiles.ucl.ac.uk/90100-ramy-saad/publications">Rumy Sars</a> from University College London.</p>

    <p>The substance in question, theobromine, is famously known to be toxic to dogs. However, that's just one aspect...</p>
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Feel free to modify any specific terms or phrases further!

Source: www.newscientist.com

She collaborated in Harvard’s laboratory on reversing the aging process.

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Petrova’s return flight from Paris landed in Boston on the evening of February 16th. As the plane sat on the tarmac, she exchanged messages with Dr. Peshkin regarding the handling of a package at customs. However, the passengers had already disembarked the plane, so Petrova cut the conversation short.

Initially, Petrova felt her re-entry was normal. At Passport Control, officials verified her J-1 visa sponsored by Harvard and recognized her as a biomedical researcher. Her passport was stamped, and she was acknowledged by the state.

As she made her way to retrieve her package, Border Patrol officers approached her and requested to search her suitcase. Her biggest concern was that the embryo sample inside would be compromised, as RNA is easily damaged. She admitted her lack of knowledge about the rules. The officer, in a polite manner, informed her that she was allowed to proceed.

Subsequently, another officer entered the room, and the tone of the conversation shifted, according to Petrova. This officer asked detailed questions about Petrova’s work and travel history in Europe. Petrova was then informed that her visa had been revoked and was questioned about her fear of being deported to Russia.

“Yes, I’m afraid to return to Russia,” she expressed, as per a Homeland Security Department transcript provided by her attorney. “I fear that the Russian Federation will harm me for protesting against them.”

Petrova’s lawyer, Greg Romanovsky, acknowledged her violation of customs regulations but argued that it was a minor offense punishable by forfeiture and fines.

Romanovsky emphasized the need for agents to establish a valid basis for revoking her visa and contended that violation of customs regulations was not sufficient justification. Lucas Gattentag, a professor at Stanford Law School, concurred and criticized the government for creating an improper immigration status that led to Petrova’s detention.

In February, customs officials detained Petrova at Logan International Airport in Boston for not declaring a sample of frog embryos.
credit…M. Scott Brauer of the New York Times

A DHS spokesperson questioned the cancellation of Petrova’s visa and cited the discovery of Petri dishes and vials of embryonic stem cells in the package without proper authorization during a dog inspection.

The spokesperson asserted that individuals were detained legally after lying to federal officers about bringing biological materials into the country. Petrova’s cell phone messages indicated intentions to smuggle materials through customs without declaration, demonstrating a deliberate violation of the law.

Following the cancellation of Petrova’s visa by Border Patrol agents, she became an undocumented immigrant amidst the immigration policies of the Trump administration. She was held at the Richwood Detention Center, awaiting a hearing to present her asylum case before an immigration judge.

Romanovsky filed a petition for her release in federal court, urging ICE to grant her parole. He pleaded for compassion, suggesting that under different circumstances, Petrova would have been released much earlier.

Petrova spent last month in a dormitory with bunk beds, coping with the cold and receiving limited outdoor time. She shared her observations on the diverse group of women around her, highlighting the harsh conditions they all experienced.

She challenged her preconceived notions of the US compared to her experiences in Russia, expressing disbelief at the treatment she and others received. Petrova emphasized the need for basic rights for all individuals, even immigrants under detention.

Source: www.nytimes.com

New Study Finds that Regularly Reading Articles Can Help Protect Your Brain from Aging

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Are you looking to keep your mind sharp as you age? One secret could be as simple as regularly exercising your brain with mathematics and reading comprehension, whether it’s at work, at home, or even while reading this article.

A groundbreaking new study led by Professor Eric Hanushek of Stanford University suggests that engaging in mathematics and reading can help prevent age-related cognitive decline. The research shows that individuals who regularly practice these skills do not experience significant declines in cognitive abilities over time, whether they are reading emails, doing calculations, or reading articles like this one. This challenges the notion that cognitive decline is inevitable with age.

The study reveals that cognitive skills typically peak in a person’s 40s before slowly declining. However, those who consistently engage in mathematics and reading, whether at work or in their daily activities, show no decline at all.

“Our findings indicate a significant increase in average skills in literacy and numeracy until the 40s. After this point, there is a slight decrease in literacy skills and a more noticeable decline in numeracy,” the study notes.

This study may inspire you to tackle your taxes – Credit: Skynesher

These findings challenge previous studies that suggested cognitive decline begins in early adulthood. Unlike past research that compared different age groups at one point in time, this study followed the same individuals over several years, providing a more accurate understanding of how cognitive abilities change with age.

Hanushek and his team propose that what was previously thought to be age-related cognitive decline might actually be due to differences in skill levels between generations rather than the natural effects of aging itself.

By analyzing data from language and mathematics assessments in the German population aged 16-65 and retesting the same group 3.5 years later, researchers found that women’s math skills declined significantly over time, indicating potential gender disparities. Further exploration of these differences is planned for future studies.

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Source: www.sciencefocus.com

Severe fever can accelerate biological aging in elderly individuals

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Woman drinks water during heat waves in French Hierrez

Magali Cohen/Hans Lucas/AFP Getty Images

Extreme fever appears to speed up biological aging in older adults, suggesting that it may increase the risk of age-related diseases.

“This is one of the first large-scale studies linking long-term heat exposure to biological aging in humans,” he says. Eun Young Choi At the University of Southern California. “Elderly people who live in areas with biologically extreme heat in cooler areas.”

Choi and her colleagues analyzed genetic data extracted from blood samples collected by other researchers from 3,600 people in the US in 2006-7. At the time, they were all over 56 years old.

They estimated the biological age of each participant using three so-called epigenetic clocks, including seeing patterns of chemical tags called methyl groups on DNA. These patterns change as we age, and such changes are associated with age-related diseases.

The researchers also looked at daily temperature measurements taken within a few kilometres of where participants lived for six years before blood samples were collected.

They found that every 200 days of six years when participants were exposed to daily maximum temperatures of at least 32.2°C (90°), biological age was on average up to 3.5 months old, and on average up to 3.5 months of age than those in cooler areas. That number depends on which watch was used.

“This refers to heat exposure increasing the rate of biological aging,” he says. Austin Argencheri At Harvard University, where he was not involved in the research.

Previous studies on the Taiwanese and German people have also found a link between extreme heat exposure and biological aging.

However, epigenetic watches do not fully capture the aging process or the risk of people's illnesses, says Argentieri. “More jobs that can link both extreme heat exposure, biological aging from these watches, age-related diseases, mortality and the effects on life expectancy itself will help us drive home what we need to take away from now on.”

Furthermore, the study did not consider access to air conditioners or the duration of time participants spent outdoors, so individual exposure changes to heat exposure, says Argentieri. The team controlled for other factors such as age, gender, race, wealth, ethnicity, smoking status, alcohol consumption, obesity, and physical activity.

Furthermore, research should investigate whether results will be translated to younger people or to people living in different countries where people may have different approaches to keeping people cool, says Argentieri.

Identifying the people who are at the lowest risk of aging fastest due to extreme heat could help policymakers develop and deploy measures to protect them, he says.

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Source: www.newscientist.com

Omega-3 Supplements may slow down the process of biological aging

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Omega-3 Supplements may be an easy way to slowden aging

EVGENIIA SIANKOVSKAIA/Getty Images

Omega 3 supplements every day, especially when combined with vitamin D and exercise, seems to slow the biological aging of the elderly.

We already knew that “good” fat, which is seen in seeds, nuts, and fish can enhance immunity, heart health, and brain function.

They are also linked to changes “Epigi Nete” markerDNA chemical tags that change the activity of the gene and the behavior of cells. This suggests that Omega 3 reduces pace Biological agingIn many cases, it is defined as a measure of how fast someone has deteriorated, compared to the body of the general group.

To explore this further Heike Bischoff-Ferrari The University of Zurich and her colleagues divided 777 Switzerland, 70 and 91, into eight groups. They also wanted to know how Omega-3 works along with vitamin D supplements and exercise.

“Omega-3 plays on multiple routes of aging, such as anti-inflammatoryness. Similarly, vitamin D and exercise have multiple advantages,” says Bischoff-Ferrari. “Did we think that there are additional advantages if you play in each of these differential routes?”

Some participants had already taken these supplements at the start of the research or doing strength training. According to Bischoff-Ferrari, it was not ethical to stop exercising or stop taking specific supplements, so it was allowed to continue.

In addition to the existing lifestyle habits, each group was told to have a variety of combinations of one grams of Omega-3, placebo tablets, and 2000 international unit vitamin D. Muscle training three times a week.

For example, some people have been asked to take 3 tablets of omega, take vitamin D supplements, and do additional strength training, or have been asked to take vitamin D with strength training. I didn't take Omega 3.

At the start of the research, researchers estimated the biological age of the participants using the “Epi Nete Watch”, which was previously developed by teams and other researchers. These analyzed a DNA marker called methyl group in a blood sample that generally decrease with age and impairs cell function.

Through the same three years later, the scientists have been told to take Omega 3, aging only about three months less than employees who are only given placebo pills. I discovered that there was no. They explained the factors that could affect the results, such as the actual age, gender, weight, and height of the participants.

“This is today's biggest test that suggests that simple supplements contribute to the slowdown of biological aging,” says Bischoff-Ferrari.

Furthermore, those who took Omega-3 with vitamin D and did less tension training compared to those who did not introduce any of these habits as part of the trial. “The effect was somewhat remarkable, and it was almost four months of rejuvenation,” says Bischoff-Ferrari.

These effects may seem small, but it may be important for some people. Richard Siou At King Scarage Rondon. “This is more important for the elderly, because it may be more likely to decrease in age in about three months,” he says.

However, epigenetic watches are not a complete scale of biological aging. “Just because DNA's biomarker indicates that you resemble a young person does not necessarily mean that you are healthy in some way,” says SIOW.

Further research says that it is necessary to evaluate what changes in measures such as cognitive, motor skills, and heart health mean. The Bischoff-Ferrari team analyzes participants' data on these results.

Another restriction of this study was that the participants were relatively healthy and active, and there was almost no lack of vitamin D. Bischoff-Ferrari says that there is a need for a further research in which people who live in other countries without these characteristics and young people in other countries are involved.

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Source: www.newscientist.com

Traveling through space accelerates muscle aging greatly

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The muscle cells briefly stayed with astronauts on the International Space Station

Shutterstock / Artsiom P

After a week in the microgravity of space, muscle cells age and their gene activity becomes similar to that of cells that have aged for years on Earth, a finding that may explain why muscle function is impaired during space travel.

We know that astronauts are at risk of losing bone density and muscle mass due to the extremely low gravity of space. Gun Fan Researchers from Stanford University in California and their colleagues analyzed the effects of microgravity on the genetics of muscle cells.

Source: www.newscientist.com

You may not be consuming enough fiber, which could be accelerating the aging process

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It has been suggested by expert nutritionists Dr. Emily Leeming and Nutritional Psychologist Kimberly Wilson that many individuals are experiencing accelerated brain aging due to a lack of dietary fiber. This deficiency in fiber may be a contributing factor to the prevalence of Alzheimer’s disease and dementia. Dementia, a neurodegenerative disease resulting in memory loss, is considered a model of accelerated brain aging, according to Wilson. This emphasizes the importance of dietary fiber for maintaining brain health and activity.

Leeming and Wilson point out that most adults in the UK do not consume an adequate amount of fiber, with the recommended daily intake being at least 30g. However, data shows that British adults only consume around 19g per day, while U.S. adults consume even less at 15g per day. The high cost of fiber-rich foods compared to less healthy options is one reason why individuals may not be meeting their fiber requirements.

Why is Fiber Important for Brain Health?

Wilson describes fiber as an underappreciated protector of the brain. When gut bacteria metabolize fiber, they produce short-chain fatty acids which play a crucial role in protecting the brain. These fatty acids can cross the blood-brain barrier and prevent toxic substances from passing through, highlighting the importance of fiber in maintaining brain health.

Tips for Increasing Fiber Intake

Leeming emphasizes the importance of including fiber-rich foods in the diet to improve gut health and overall well-being. Some tips for increasing fiber intake include focusing on fiber-rich foods like rye bread and beans, snacking on nuts, adding vegetables to meals, and consuming dark chocolate and root vegetables with the skin on.

Increasing fiber intake can also lower the risk of various health conditions, including colon cancer, type 2 diabetes, and heart disease. It can also support a healthy gut microbiome, which is essential for overall health.

Learn More About Our Experts

Kimberly Wilson is a licensed psychologist with a Masters in Nutrition and is a published author of books on healthy brain development and the impact of food on mental health.

Dr. Emily Leeming is a Registered Dietitian and Research Fellow with expertise in the impact of diet on the gut microbiome. She has published a book on the science of diet for gut health.

Source: www.sciencefocus.com

Is an aging NASA probe redefining the limits of our solar system?

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NASA’s New Horizons spacecraft is hurtling out of our solar system at incredible speed. It’s currently about 8 billion kilometers from the Sun, and by the time you finish reading this article, it will be thousands of kilometers further into the frigid darkness. Space is lonely; even the giant planet Jupiter is just a tiny speck.

New Horizons is best known for getting the first proper glimpses of the dwarf planet Pluto in 2015, which it had previously only seen as a faint smudge. It also taught us a lot about the outer solar system and the tiny frozen worlds that float there. “It’s really been an Alice in Wonderland kind of story,” says Alan Stern, the mission’s principal investigator. “It’s been a magical experience, and we’ve made some amazing discoveries.”

But the dream isn’t over yet, because New Horizons may make a surprise final move. In early 2024, one of New Horizons’ detectors recorded an unexpected increase in the amount of dust it encountered. That material could have been created by collisions between rocky fragments, and astronomers now suspect that there may be many objects beyond the rubble-strewn Kuiper Belt, often considered the edge of the solar system. If so, the boundaries of the solar system would need to be redrawn, calling into question models of the formation of the solar system.

Stern and his colleagues are clearly hoping to take advantage of the rover’s unique location to learn more about this unexplored wilderness while they still can. “This is…

Source: www.newscientist.com

You may be lacking in fiber intake, which could accelerate aging

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Research indicates that a lack of dietary fiber may result in accelerated brain aging, potentially contributing to the prevalence of Alzheimer’s disease and dementia. Expert nutritionists, such as Dr. Emily Leeming and Nutritional Psychologist Kimberly Wilson, presented this theory at the Cheltenham Science Festival.

In fact, dementia, a condition characterized by memory loss, is described as a model of accelerated brain aging by Wilson. This highlights the importance of dietary fiber for brain health and overall well-being.

Most adults in the UK are not consuming enough fiber, falling short of the recommended intake of 30g per day for optimal health. This deficiency poses a risk factor for various health conditions, including cognitive decline and neurodegenerative diseases.

According to Leeming and Wilson, consuming fiber-rich foods is essential for brain protection. Fiber is metabolized by gut bacteria, producing short-chain fatty acids that play a crucial role in maintaining the integrity of the blood-brain barrier. These fatty acids help prevent the passage of harmful substances into the brain.

If you are not getting enough fiber in your diet, Leeming suggests incorporating fiber-rich foods like rye bread, beans, nuts, and vegetables. Additionally, consuming dark chocolate and root vegetables with the skin on can help boost your fiber intake.

By increasing fiber consumption, individuals can support their gut health, manage blood sugar levels, and reduce the risk of chronic diseases. Leeming and Wilson emphasize the importance of fiber for overall health and well-being.

Our experts, Kimberly Wilson and Dr. Emily Leeming, have extensive experience in nutrition and psychology, respectively. Wilson is a licensed psychologist and author, while Leeming is a Registered Dietitian and Research Fellow with a focus on the gut microbiome.

Source: www.sciencefocus.com

A unique mutation linked to short stature may hold clues to understanding the aging process

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Two of the researchers and several study participants with Laron syndrome

Jaime Guevara-Aguirre and Bartel Longo

People with rare genetic mutations that cause short stature and may even live longer are helping to understand the causes of aging.

People with unusual genetic mutations have some characteristics that protect them from heart disease, one of the most common causes of death, and this explains why their life expectancy exceeds that of the general population. You may have.

A signaling molecule called insulin-like growth factor-1 (IGF-1) has long been suspected to be involved in longevity. Several animals, including worms and mice, have been shown to live longer when their levels of this compound are artificially lowered, such as through genetic modification. Centenarians also have slightly lower IGF-1 levels,on average.

In most species, IGF-1 promotes growth when the animal is young and influences how cells use energy later in life. One idea is that there is a trade-off between animals investing energy in further growth and maintaining health.

“As you get older and your body starts to break down, you want to spend your energy on preventing your body from breaking down instead of spending it on growth,” he says. Nir Barzilai from the Albert Einstein College of Medicine in New York was not involved in the new study.

The question of whether this trade-off also occurs in humans is through a rare genetic disease called Laron syndrome, first identified in a group of Ecuadorians whose ancestors left Spain during the Inquisition centuries ago. can be researched.

This mutation causes people to have defective growth hormone receptors, leading to short stature. People with Laron syndrome also have low levels of IGF-1 because the release of IGF-1 is usually triggered by growth hormone.

Because so few people carry the mutation, it is unclear whether it truly extends lifespan. Suggestive evidence comes from a 2011 study of 90 Ecuadorians with Lalon syndromean estimated 400 to 500 people are affected worldwide.

The researchers found that more people with the disease were surviving longer than expected compared to the general Ecuadorian population. 'We know they are more common in older people' walter longo at the University of Southern California in Los Angeles.

In the latest study, Longo and his colleagues compared 24 people with Laron syndrome from Ecuador or the United States to 27 relatives who did not have the mutation. People with Laron syndrome appeared to be healthier on several heart-related measures, including blood pressure, blood sugar levels, and sensitivity to insulin, a hormone involved in controlling blood sugar levels.

People with this mutation also had higher levels of a compound called low-density lipoprotein. Low-density lipoproteins are also known as “bad cholesterol” because they are thought to make arteries more susceptible to plaque, which can lead to heart attacks. However, only 7 percent of Laron syndrome patients had such plaques, compared with 36 percent of their relatives.

The small number of people in the study means this difference may have arisen by chance, but it does suggest that their arteries appear less unhealthy than those of people without the mutation. suggests, Longo said.

It has also previously been shown that people with Laron syndrome are less likely to develop cancer and may have a lower incidence of cancer. Decline in cognitive function that usually occurs with older age.

This new finding supports the idea that somehow weakening the IGF-1 signaling pathway in later life can slow the aging process. Alexey Maklakov at the University of East Anglia, Norwich, UK. “It's a matter of timing,” he says. “At critical stages of growth and development, you definitely don't want to do that. But later in life, it can interfere with the function of these pathways.”

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Source: www.newscientist.com

The “Aging Atlas”: A Tool to Help Maintain Youthful Muscles

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Do you notice your muscles becoming more rigid and harder to manage as you age? A new ‘Atlas of Aging’ has been developed to explain why this happens and to provide potential treatments to prevent it. Additionally, it may lead to legal action.

Focusing on the effects of natural aging, this atlas delves into the intricate changes that occur in muscle tissue at the cellular and molecular levels as we grow older. It also highlights how our muscles actively combat the aging process, potentially aiding in the development of new treatments to enhance the aging body.

As we age, our muscles can weaken, making everyday activities like standing and walking more challenging. However, the underlying causes of this decline are not fully understood. Frailty can lead to an increased risk of falls, reduced mobility, and loss of independence.

Lead author, Dr. Sarah Teichman from the Wellcome Sanger Institute, states that these insights into healthy skeletal muscle aging are empowering researchers worldwide to explore various strategies to combat inflammation, promote muscle regeneration, maintain neural connections, and more.

Longevity expert Andrew Steele emphasizes the importance of understanding the cellular changes that contribute to the loss of physical strength as we age. He underscores the potential of this research to develop therapeutic interventions that support healthier aging in future generations.

The creation of the atlas of aging muscle involved utilizing advanced imaging and single-cell sequencing techniques to analyze skeletal muscle samples from 17 adult donors aged between 20 and 75. The findings shed light on gene activity related to protein production and revealed how muscle fibers age at different rates.

Age-related loss of primary fast-twitch muscle fibers is mitigated by the body’s ability to enhance the properties of remaining fibers and rebuild connections between weakened nerves and aging muscles. This understanding can potentially inform strategies to maintain strength and independence as we grow older.

To learn more about the experts involved in this research, Dr. Andrew Steele, a scientist, author, and presenter, has authored “Ageless: The new science of growing older without getting older.” Combining his background in physics with biology, Steele’s work focuses on deciphering human DNA at the Francis Crick Institute in London.

Read more:

  • What happens to my body as I get older?
  • 9 simple science-backed changes to reverse your biological age
  • Groundbreaking discovery of anti-aging cells could help people stay young for longer

Source: www.sciencefocus.com

Slowing Aging and Preventing Dementia Through Restoration of Brain Mitochondria

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Protein plaques in the brain may be caused by mitochondrial dysfunction

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If you own a car, you’ve probably noticed that your engine becomes less efficient over time. The farther you drive, the more fuel it takes to cover the same distance. Eventually, you’ll end up with so little power that you need a physical push to climb a gentle hill.

It is now becoming clear that much the same holds true for the human brain. Microscopic structures called mitochondria, found in all brain cells, are literally the engines of our thoughts and emotions. As we age, we find it increasingly difficult to generate enough energy to power mental activity. Worse, just like an old car leaves behind a cloud of smoke, the power source of our cells begins to produce unnecessary waste products that slowly pollute our brains. This means that mitochondrial dysfunction may underlie some of the most serious brain diseases, including Alzheimer’s disease, Parkinson’s disease, Huntington’s disease, and motor neuron disease.

According to this “grand unified theory” of neurodegeneration, recharging neurons through restoration of their power plants can prolong healthy brain function. This idea has already inspired some exciting new treatments for age-related brain diseases, with multiple drug candidates under investigation. Some researchers are exploring the possibility of transplanting healthy mitochondria into damaged, aging brains to reactivate them. “If you keep replacing the parts in your car, it can last forever,” he says. claudio soto, a neurologist at the University of Texas Health Science Center at Houston. “So what happens if we try to run this…

Source: www.newscientist.com

Decoding the key to aging well with medaka fish

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A study of killifish by the Max Planck Institute revealed that older fish enter a state of starvation due to changes in their adipose tissue. Activating a specific subunit of AMP kinase restores health and longevity in humans, suggesting a new way to promote healthier aging in humans.

Genetic switch rescues aging fish from starvation trap.

Fasting interventions that alternate between fasting and refeeding are generally thought to improve health. However, these interventions do not work well in older animals.

The question is, why?

By studying short-lived killifish, researchers at the Max Planck Institute for the Biology of Aging in Cologne found that older fish deviate from the fasting and refeeding cycles of their youth, and even when they consume food, they permanently It was shown that the body enters a state of fasting. However, the benefits of post-fasting refeeding in old medaka fish can be restored by genetically activating specific subunits of AMP kinase, an important sensor of cellular energy.

These mutant fish experience improved health and longevity and require both fasting and refeeding to provide health benefits, which have been shown to act through AMP kinase. I am.

Medaka ages rapidly. The bright colors of their youth fade in just a few months.Credit: K. Link / Max Planck Institute for the Biology of Aging

It has already been shown in many model organisms that reducing food intake through calorie restriction or periods of fasting has positive effects on health. However, it is difficult for humans to reduce the amount they eat throughout their lifetime. To find the optimal timing for fasting, researchers introduced fasting interventions at different ages, but found that these interventions in older adults did not provide the same benefits as in younger animals.

A research team in Cologne, Germany, now investigated the effects of age-related fasting on medaka fish. Medaka is a rapidly aging fish that grows from young to old in just a few months. The researchers either starved young and old fish for several days or fed them twice a day. They found that the visceral adipose (adipose) tissue of older fish became less responsive to feeding. “Adipose tissue is known to respond most strongly to changes in food intake and plays an important role in metabolism, which is why we looked at it more closely,” said lead author of the study. explains Roberto Ripa.

It is important to alternate between fasting and meals

The researchers found that, unable to respond to the feeding phase, the adipose tissue of old fish enters a permanent state of starvation, where energy metabolism ceases, protein production decreases, and tissue does not renew. “We thought that older fish would be unable to switch to fasting after feeding. Surprisingly, the opposite was true, and older fish would be unable to switch to fasting after feeding. , they were in a state of permanent starvation,” said study leader Adam Antebi, director of the Max Planck Institute for the Biology of Aging.

Permanently fasted adipose tissue

When the researchers looked more closely at how the fat tissue of old fish differs from that of young fish, they discovered a specific protein called AMP kinase. This kinase is a cellular energy sensor and is composed of various subunits, among which the activity of the γ1 subunit decreases with age. When scientists genetically engineered this subunit to increase its activity, the starvation-like state was overcome, and the old fish became healthier and lived longer.

human aging

Interestingly, an association was also found between the γ1 subunit and human aging. Significantly lower levels of certain subunits were measured in samples from older patients. Additionally, in human samples, we were able to show that people who are less frail at older ages have higher levels of the γ1 subunit.

“Of course, we still don’t know whether the human γ1 subunit is actually involved in healthy aging. The next step is to find a molecule that precisely activates this subunit and use it to “We investigate whether this can have a positive impact on aging,” explains Adam Antebi.

Reference: “Refeeding related AMPK”γ1 Complex activity is a hallmark of health and longevity.” Roberto Ripa, Eugen Barrissa, Joachim D. Steiner, Raymond Lavoie, Andrea Annibal, Nadine Hocher, Christian Razza, Luca Dolfi, Chiara Calabrese, By Anna M. Meyer, Maria Cristina Polidori, and Roman – Ulrich Müller and Adam Antebi, November 13, 2023, natural aging.
DOI: 10.1038/s43587-023-00521-y

Source: scitechdaily.com

The surprising evolutionary advantage of aging: Why do we age?

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Researchers used computer models to investigate the evolutionary role of aging. They challenge the notion that aging has no positive effects and suggest that aging may promote evolution in a changing environment, thereby benefiting subsequent generations. I am. Their findings indicate that aging may be an advantageous trait selected by natural evolution. Credit: SciTechDaily.com

The mysteries of aging have fascinated people for thousands of years. Because aging is usually associated with a gradual decline in most bodily functions, many people are willing to do anything to stop or reverse this process. Aging is a natural part of life, but biologists understand surprisingly little about the evolutionary emergence of this process. It’s not clear whether aging is inevitable. That’s because there are some organisms that never seem to age at all, and there is also a phenomenon known as negative aging or rejuvenation. In some turtles, vital functions improve with age.

Studying the evolutionary role of aging

Researchers at the Institute for Evolution, led by scholar Airs Zatmary, have sought to debunk previously proposed but unproven theories of aging. This theory suggests that, under the right circumstances, evolution can encourage the proliferation of genes that control aging.

To test their hypothesis, the researchers used a computer model they developed. This model is an algorithm that allows scientists to simulate long-term processes in populations of organisms and genes in a controlled environment. Essentially, such models allow you to run evolutionary scenarios and get results in hours instead of millions of years. Modern evolutionary research is unthinkable without computer modeling.

Exploring the purpose of aging

The basic research question was simple. The question was, “Is there any meaning to aging?” Does it serve some evolutionary function or is it truly a bitter and deadly byproduct of life? “If there is selection for aging, then aging may have an evolutionary function. Our study aimed to reveal this selection,” he says Eörs Szathmáry. “According to the classical explanation, aging occurs in a population even without selection. It is because individuals die sooner or later without aging (as a result of disease or accidents), This creates an opportunity for genes to accumulate that have a negative effect on older individuals (thus causing aging), meaning that aging is only a side effect of evolution. It means that there is no adaptive function.”

Challenging common sense

During the last century, several evolutionary theories have been formulated to explain inevitable aging without active functions using different biological mechanisms. Although some scientists accepted this assumption as fact, the discovery of organisms that do not age led more and more researchers to question the inevitability of aging and to suggest that perhaps aging has benefits as well. I suggested that it might be.

“The evolutionary biology community has accepted that classical non-adaptive theories of aging cannot explain all aging patterns in nature, meaning that the explanation of aging has once again become an open question. “I mean,” Zatomary said. “Alternative adaptation theories provide a solution to this problem by suggesting positive effects of aging. For example, aging and death may be more advantageous for individuals in a changing environment. This is because doing so reduces competition that prevents the survival and reproduction of more fit offspring with a better genetic makeup.

However, this scenario is only true if the individual is surrounded primarily by relatives. Otherwise, during sexual reproduction, non-senescent individuals would “steal” better (better adapted to environmental changes) genes from aging population members, thus erasing significant senescence.

Aging as a catalyst for evolution

Hungarian biologists ran a model and found that aging can actually accelerate evolution. This is an advantage in a changing world. Faster adaptation allows us to find suitable traits faster, which supports the survival and spread of offspring genes. This means that aging can become a highly advantageous trait and be favored by natural selection.

Reference: András Siraj, Tamash Charan, Mauro Santos, Airs Zatmary, “Directional selection combined with kin selection favors the establishment of senescence”, October 23, 2023. BMC biology.
DOI: 10.1186/s12915-023-01716-w

Funding: National Agency for Research, Development and Innovation (Hungary), Bolyai János Research Fellowship of the Hungarian Academy of Sciences, New National Excellence Program of the Ministry of Culture and Innovation, Ministry of Science and Innovation, Autonomous Region of Catalonia 2021 Special Guest Scientist Volkswagen Foundation, Hungary Fellowship Program of the Academy of Sciences (Initiative “Leben?

Source: scitechdaily.com