Research
New math discovery provides method for studying cell ageing

New mathematical tools revealing how quickly cell proteins break down are poised to uncover deeper insights into how we age, according to a recently published paper.
The paper, co-authored by researchers at Mississippi State, Harvard Medical School and the University of Cambridge, “Maximum entropy determination of mammalian proteome dynamics,” presents the new tools that quantify the degradation rates of cell proteins—how quickly they break down—helping us understand how cells grow and die and how we age.
Proteins—complex molecules made from various combinations of amino acids—carry the bulk of the workload within a cell, providing its structure, responding to messages from outside the cell and removing waste.
The results proved that not all proteins degrade at the same pace but instead fall into one of three categories, breaking down over the course of minutes, hours or days. While previous research has examined cell protein breakdown, this study was the first to quantify mathematically the degradation rates of all cell protein molecules, using a technique called maximum entropy.
Galen Collins, assistant professor in MSU’s Department of Biochemistry, Molecular Biology, Entomology and Plant Pathology, co-authored the paper published in the Proceedings of the National Academy of Sciences, or PNAS, in April.
“We already understand how quickly proteins are made, which can happen in a matter of minutes,” said Collins, who is also a scientist in the Mississippi Agricultural and Forestry Experiment Station.
“Until now, we’ve had a very poor understanding of how much time it takes them to break down.”
Lead author Alexander Dear, research fellow in applied mathematics at Harvard University, adds: “For certain kinds of scientific questions, experiments can often reveal infinitely many possible answers; however, they are not all equally plausible. The principle of maximum entropy is a mathematical law that shows us how to precisely calculate the plausibility of each answer—its ‘entropy’—so that we can choose the one that is the most likely.”
“This kind of math is sort of like a camera that zooms in on your license plate from far away and figures out what the numbers should be,” Collins said.
“Maximum entropy gives us a clear and precise picture of how protein degradation occurs in cells.”
In addition, the team used these tools to study some specific implications of protein degradation for humans and animals. For one, they examined how those rates change as muscles develop and adapt to starvation.
“We found that starvation had the greatest impact on the intermediate group of proteins in muscular cells, which have a half-life of a few hours, causing the breakdown to shift and accelerate,” Collins said.
“This discovery could have implications for cancer patients who experience cachexia, or muscle wasting due to the disease and its treatments.”
They also explored how a shift in the breakdown of certain cell proteins contributes to neurodegenerative disease.
“These diseases occur when waste proteins, which usually break down quickly, live longer than they should,” Collins said.
“The brain becomes like a teenager’s bedroom, accumulating trash, and when you don’t clean it up, it becomes uninhabitable.”
Dear affirmed the study’s value lies not only in what it revealed about cell protein degeneration, but also in giving scientists a new method to investigate cell activity with precision.
“Our work provides a powerful new experimental method for quantifying protein metabolism in cells,” he said. “Its simplicity and rapidity make it particularly well-suited for studying metabolic changes.”
Collins’s post-doctoral advisor at Harvard and a co-author of the article, the late Alfred Goldberg, was a pioneer in studying the life and death of proteins. Collins noted this study was built on nearly five decades of Goldberg’s research and his late-career collaboration with mathematicians from the University of Cambridge. After coming to MSU a year ago, Collins continued collaborating with his colleagues to complete the paper.
“It’s an incredible honour to be published in PNAS, but it was also a lot of fun being part of this team,” Collins said. “And it’s very meaningful to see my former mentor’s body of work wrapped up and published.”
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New Alzheimer’s treatments could slow memory loss
News
Agetech World research and innovation round-up

We round up the latest news in agetech research and innovation, from a human trial in ‘reverse ageing’ to the launch of a domestic longevity pod.
Approval has been secured in the United States for the first human trial targeting ‘reverse ageing’.
Boston-based company Life Biosciences will shortly commence trials of its ER-100 treatment which aims to treat eye disease through reprogramming cells.
It will initially treat around a dozen patients with glaucomas – a condition where high pressure inside the eye damages the optic nerve.
Each patient will receive injections of three powerful genes into an eye in an attempt to restore host cells to a healthier state by resetting their epigenetic controls.
It is over 20 years since Dr Shinya Yamanaka’s Nobel Prize work was first able to convert adult cells into pluripotent stem cells.
This reverse cell-editing process allows the regenerated cells – just like those found in an early embryo – to develop into the different, specialised cell types.
This trial has been approved by the Food And Drug Administration (FDA) after initial trials on animals proved a success.
Michael Ringel, chief operating officer at Life Biosciences, said: “It’s an incredibly big deal for us as an industry.
“It’ll be the first time in human history, in the millennia of human history, of looking for something that rejuvenates … So watch this space.”
Inherited longevity
New research claims that longevity-inheritability accounts for around 50 per cent of human lifespan.
For many decades, scientists had rated genetics as being a relatively low factor in human lifespan – compared to other inherited traits – at between 10 per cent and 25 per cent.
However, this new study from the Israeli-based Weizmann Institute of Science, presents an entirely different picture.
Led by Ben Shenhar, a PhD student, from the lab of Prof Uri Alon of Weizmann’s Molecular Cell Biology Department, it analysed three large twin databases from Sweden and Denmark – including a dataset of twins who were raised apart.
The researchers showed that earlier heritability estimates were masked by high levels of extrinsic mortality, such as deaths caused by accidents, infections and environmental hazards.
Their findings are consistent with the heritability of other complex human traits and with findings from animal models.
“For many years, human lifespan was thought to be shaped almost entirely by non-genetic factors, which led to considerable skepticism about the role of genetics in ageing and about the feasibility of identifying genetic determinants of longevity,” said Shenhar.
“By contrast, if heritability is high, as we have shown, this creates an incentive to search for gene variants that extend lifespan, in order to understand the biology of aging and, potentially, to address it therapeutically.”
Longevity blood test
In just a few years a simple blood test should be sufficient to gauge one’s anticipated longevity, claims Dr Tan Min-Han, chief executive and medical director of Singapore and Californian-based firm Lucence.
Dr Tan believes people will be able to go to a clinic near them to take a simple blood test that can detect early signs of ageing.
The results could guide lifestyle changes, such as sleep, diet and exercise, to improve key biomarkers and slow physical decline.
Lucence was founded in 2016 as a spin-off from Singapore’s Agency for Science, Technology and Research. While incorporated and headquartered in Singapore, the company also maintains a co-headquarters in Palo Alto, California.
Since then, it has secured more than US$80m in equity funding, including US$20m in a 2019 funding round led by IHH Healthcare.
He said: “Blood tests are more acceptable and accessible as opposed to uncomfortable procedures like mammograms and colonoscopies. I believe that technology could make a lot of this better.
“Five years ago, being able to detect cancers from blood tests was science fiction. But now, we have made that a reality.”
Longevity pod
A domestic longevity pod known as the E-Salt Cabin has been launched by Eleve Health, a California-based wellness technology company
Roughly the size of a compact car – at just over eight and a half feet long – the pod combines four core therapies: halotherapy, red light therapy, oxygen delivery, and aromatherapy.
Halotherapy disperses a fine, mineral-rich mist designed to support respiratory health. Red light therapy stimulates cellular repair and regeneration. Oxygen delivery aims to improve circulation and energy levels. And custom essential oil blends add a sensory layer
The company says it can be used as a tool to ‘support circulation, clarity, and recovery within a residential setting’.
Eleve said: “The pod reflects a broader shift among ultra-high-net-worth homeowners, with wearable technology, circadian lighting, biophilic interiors, and curated soundscapes becoming standard.”
Insights
Four in ten cancer cases could be prevented globally, report finds

Up to four in ten cancer cases worldwide could be prevented, a new global analysis has found.
The study examines 30 preventable causes, including tobacco, alcohol, high body mass index, physical inactivity, air pollution, ultraviolet radiation and, for the first time, nine infections that can cause the disease.
Released ahead of World Cancer Day on 4 February, the analysis from the World Health Organization (WHO) and its International Agency for Research on Cancer (IARC) estimates that 37 per cent of all new cancer cases in 2022, around 7.1 million cases, were linked to preventable causes.
Drawing on data from 185 countries and 36 cancer types, the study identifies tobacco as the leading preventable cause of cancer, globally responsible for 15 per cent of all new cancer cases, followed by infections (10 per cent) and alcohol consumption (3 per cent).
Three cancer types, lung, stomach and cervical cancer, accounted for nearly half of all preventable cancer cases in both men and women globally.
Lung cancer was primarily linked to smoking and air pollution, stomach cancer was largely attributable to Helicobacter pylori infection (a bacterial infection of the stomach lining), and cervical cancer was overwhelmingly caused by human papillomavirus (HPV).
Dr André Ilbawi, team lead for cancer control at WHO and author of the study, said: “This is the first global analysis to show how much cancer risk comes from causes we can prevent.
“By examining patterns across countries and population groups, we can provide governments and individuals with more specific information to help prevent many cancer cases before they start.”
The burden of preventable cancer was substantially higher in men than in women, with 45 per cent of new cancer cases in men compared with 30 per cent in women.
In men, smoking accounted for an estimated 23 per cent of all new cancer cases, followed by infections at 9 per cent and alcohol at 4 per cent.
Among women globally, infections accounted for 11 per cent of all new cancer cases, followed by smoking at 6 per cent and high body mass index at 3 per cent.
Dr Isabelle Soerjomataram, deputy head of the IARC Cancer Surveillance Unit and senior author of the study, said: “This landmark study is a comprehensive assessment of preventable cancer worldwide, incorporating for the first time infectious causes of cancer alongside behavioural, environmental and occupational risks.
“Addressing these preventable causes represents one of the most powerful opportunities to reduce the global cancer burden.”
Preventable cancer varied widely between regions.
Among women, preventable cancers ranged from 24 per cent in North Africa and West Asia to 38 per cent in sub-Saharan Africa.
Among men, the highest burden was observed in East Asia at 57 per cent, and the lowest in Latin America and the Caribbean at 28 per cent.
These differences reflect varying exposure to behavioural, environmental, occupational and infectious risk factors, as well as differences in socioeconomic development, national prevention policies and health system capacity.
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