BUFFALO, NY—February 12, 2025 — A new #research paper was #published in Aging (Aging-US) on January 3, 2025, in Volume 17, Issue 1, titled “Characterization of DNA methylation clock algorithms applied to diverse tissue types.”

Researchers Mark Richardson, Courtney Brandt, Niyati Jain, James L. Li, Kathryn Demanelis, Farzana Jasmine, Muhammad G. Kibriya, Lin Tong, and Brandon L. Pierce from the University of Chicago and University of Pittsburgh, studied how biological aging is measured using DNA. Their study found that while commonly used “DNA methylation clocks” work well for blood samples, they may be less reliable for other tissues like the lungs, colon, and kidneys.

DNA methylation clocks are widely used in forensic science, epigenetics and longevity research to estimate a person’s biological age based on chemical changes in DNA. These epigenetic clocks help scientists predict age-related diseases and assess how lifestyle factors, such as smoking, impact aging. Most were originally developed using blood samples, and their effectiveness in other tissues remains unclear. This study tested eight different DNA methylation clocks across nine human tissue types, including the lungs, prostate, ovaries, skeletal muscle, and kidneys. The researchers analyzed data from 973 tissue samples collected through the Genotype-Tissue Expression (GTEx) project.

Their analysis revealed significant differences in biological age estimates across tissues. While blood samples provided the most reliable results, other tissues showed noticeable variations. For example, testis and ovary tissues appeared younger than expected, while lung and colon tissues appeared older. 

“These differences across tissue types were most apparent for clocks trained using DNAm from blood only (e.g., Hannum), but also present for clocks trained on multiple tissue types (e.g., Horvath, a clock designed for pan-tissue age prediction.”
 
These findings suggest that aging may not occur at the same rate in every organ, and that standard DNA methylation clocks may not always give accurate biological age estimates outside of blood samples. The authors suggest that new, organ-specific epigenetic clocks may be needed to improve biological age prediction. Creating tissue-specific aging clocks could also improve medical diagnostics, age-related disease prevention, and health monitoring.

The researchers emphasize that larger studies with more tissue-specific DNA methylation data are needed to refine these aging clocks. By improving these tools, scientists can better understand how aging affects different organs and develop more reliable methods for measuring biological age. These advancements could lead to better predictions of age-related diseases and new strategies for healthy aging.

DOI - https://doi.org/10.18632/aging.206182

Corresponding author - Brandon L. Pierce - brandonpierce@uchicago.edu

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The mission of the journal is to understand the mechanisms surrounding aging and age-related diseases, including cancer as the main cause of death in the modern aged population.

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Aging (Aging-US)

DNA Methylation Clocks May Require Tissue-Specific Adjustments for Accurate Aging Estimates

BUFFALO, NY — February 19, 2025 — A new #research paper was #published by Aging (Aging-US) on January 6, 2025, in Volume 17, Issue 1, titled “The profile of oxidative stress markers (arachidonic and linoleic acid derivatives) in patients with benign prostatic hyperplasia in relation to metabolic syndrome.”

A team of researchers, led by first author Weronika Ratajczak and corresponding author Olimpia Sipak from Pomeranian Medical University, examined how inflammation and metabolic health contribute to benign prostatic hyperplasia (BPH), a common condition that causes prostate enlargement in aging men, leading to urinary problems. Their findings suggest that inflammatory-related molecules in the blood may play a key role in BPH development, especially in men with metabolic syndrome—a group of conditions including obesity, high blood sugar, and high cholesterol.

BPH affects millions of men as they age, making urination more difficult and sometimes painful. While age and hormonal changes are known factors, the precise causes of prostate enlargement remain unclear. This study provides new evidence that inflammation, especially lipid-derived inflammatory markers, may be a driving factor behind BPH, particularly in those with poor metabolic health.

The research team analyzed blood samples from 219 men, including 144 with BPH and 75 without, measuring markers related to inflammation and oxidative stress. The results showed that men with BPH had significantly higher levels of pro-inflammatory molecules such as 12S-HETE and 5-HETE while having lower levels of anti-inflammatory substances like lipoxin A4. The imbalance was even more pronounced in men with both BPH and metabolic syndrome, indicating a possible link between poor metabolic health and worsening prostate conditions​.

“Furthermore, there is mounting evidence that links the onset of inflammation with the development of prostate diseases, including benign prostatic hyperplasia and prostate cancer.”

Metabolic dysfunction and chronic inflammation may not only contribute to BPH development but also exacerbate its severity. Monitoring metabolic health could play a role in reducing the risk of prostate enlargement.

Future research is needed and may focus on whether anti-inflammatory treatments or lifestyle changes—such as improved diet, weight management, and exercise—could help slow the progression of BPH or reduce its symptoms​.

DOI - https://doi.org/10.18632/aging.206187

Corresponding author - Olimpia Sipak - olimpiasipak-szmigiel@wp.pl

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Keywords - aging, benign prostatic hyperplasia (BPH), metabolic syndrome (MetS), lipid markers, inflammation, fatty acids derivatives

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Inflammation and Metabolic Syndrome Linked to Benign Prostatic Hyperplasia

Imagine a simple topical treatment that could help aging skin heal faster, reducing recovery time from wounds and even improving skin quality. Scientists may have found exactly that. A recent study, published in Aging, reveals that a compound called ABT-263 can eliminate aging cells in the skin, boosting its ability to regenerate. 

Understanding How Aging Affects Skin Healing

Aging affects the skin’s structure and function, leading to a reduced ability to heal from wounds. Scientists have long suspected that senescent cells, also known as “zombie cells,” play a major role in this decline. These cells stop dividing but refuse to die, accumulating in tissues and releasing inflammatory molecules that impair the body’s natural repair processes.

Various studies have explored senolytics, a class of drugs designed to eliminate these aging cells and restore tissue function. While these drugs have shown promise in treating diseases like osteoporosis and fibrosis, their impact on skin regeneration and wound healing has been less studied. A new study titled “Topical ABT-263 treatment reduces aged skin senescence and improves subsequent wound healing” now suggests that a topical application of the senolytic ABT-263 could significantly improve wound healing in older individuals.

Full blog - https://aging-us.org/2025/02/a-new-approach-to-healing-aging-skin-insights-from-senolytic-research/

Paper DOI - https://doi.org/10.18632/aging.206165

Corresponding author - Daniel S. Roh - droh@bu.edu

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Keywords - aging, senolytic, senescence, wound healing, ABT-263

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A New Approach to Healing Aging Skin: Insights from Senolytic Research

BUFFALO, NY — February 24, 2025 — A new #researchpaper was #published in Aging (Aging-US) on January 22, 2025, in Volume 17, Issue 1, titled “EpiAge: a next-generation sequencing-based ELOVL2 epigenetic clock for biological age assessment in saliva and blood across health and disease.”

The research team, experts from both industry (EpiMedTech Global, HKG Epitherapeutics Ltd) and academic institutions (McGill University, Oxford University, University of Catania, and the Research Institute-IRCCS), led by first author David Cheishvili and corresponding author Moshe Szyf, have developed EpiAgePublic, a new method to estimate biological age using only three key DNA sites in the ELOVL2 gene, a well-known marker of aging. Unlike traditional methods that require analyzing thousands of DNA regions, this approach simplifies the process while maintaining accuracy. Their findings show that EpiAgePublic performs as well as, or even better than, more complex models in predicting biological age in diverse populations.

Biological age measures how fast or slow a person’s body is aging. It can be different from chronological age and is influenced by genetics, lifestyle, and health conditions. Understanding biological aging can help researchers and clinicians identify age-related diseases like Alzheimer’s disease and develop anti-aging treatments. However, many existing biological age tests rely on expensive and complicated processes. The EpiAgePublic model overcomes these challenges with a simple yet powerful approach.

The study analyzed data from over 4,600 individuals across different health conditions, including Alzheimer’s disease and HIV. It confirmed that EpiAgePublic accurately tracks aging patterns and can identify factors such as chronic illness or stress that accelerate the aging process. Importantly, the researchers demonstrated that the test works well using saliva samples, offering a convenient and non-invasive alternative to blood-based tests. This makes it easier to conduct epigenetic age testing in both clinical and research settings.

“The simplicity and precision of epiAgePublic, designed for compatibility with next-generation sequencing (NGS) technologies, mark a significant step forward in the field of epigenetic research.”

The ability to measure epigenetic aging with a quick and cost-effective test has significant implications for healthcare, longevity research, and personalized medicine. This method could be used in hospitals, wellness clinics, and longevity studies to track aging and evaluate the effectiveness of anti-aging interventions. It may also help clinicians detect early signs of aging-related diseases, allowing for better preventive care.

Finally, the study’s findings highlight the advantages of next-generation sequencing in epigenetic research, leading the way for more precise and accessible aging diagnostics. Future research will explore how this model can be expanded to other health conditions and used in routine medical practice.

DOI - https://doi.org/10.18632/aging.206188

Corresponding author - Moshe Szyf - moshe.szyf@epimedtech.com

Author interview - https://www.youtube.com/watch?v=NA8Vctks0gY

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EpiAge: A New Test to Measure Biological Age Using Saliva or Blood

BUFFALO, NY — March 10, 2025 — A new #research paper was #published in Aging (Aging-US) on February 18, 2025, Volume 17, Issue 2, titled “Transcriptomic landscape of cumulus cells from patients <38 years old with a history of poor ovarian response (POR) treated with platelet-rich plasma (PRP).”

Researchers from IVIRMA New Jersey, Yale School of Medicine, Yale University, and Acibadem Mehmet Ali Aydinlar University studied how a treatment called platelet-rich plasma (PRP) might help women with poor ovarian response. Their results suggest that PRP may enhance ovarian rejuvenation and improve egg quality, potentially increasing pregnancy success rates for women undergoing in vitro fertilization (IVF).

Diminished ovarian reserve is a major challenge in fertility treatments, affecting many women undergoing IVF. It is associated with fewer collected eggs and lower pregnancy success rates. Some studies have explored PRP—a concentration of growth factors derived from a patient’s own blood—as a potential treatment to rejuvenate ovarian function. However, the biological effects of PRP treatment at the molecular level remain unclear.

In this study, the research team, led by first author Leah M. Roberts and corresponding author Emre Seli, analyzed cumulus cells, specialized cells that surround the egg, using RNA sequencing technology. Samples were collected from women aged 18 to 37 with poor ovarian response, who either received PRP therapy or standard treatment before IVF.

The results showed significant differences in gene expression between the two groups. PRP-treated samples exhibited increased activity in genes related to metabolism, cell survival, and communication between cells, all of which are crucial for egg development and fertility. One key finding was that PRP influenced carbohydrate metabolism in cumulus cells. This is essential, as cumulus cells provide energy to the developing egg, and previous research has linked metabolic health to embryo quality. PRP also appeared to regulate pathways related to cell proliferation and programmed cell death, suggesting it may help support egg survival.

“Our findings indicate that PRP treatment regulates certain pathways that could contribute to follicular activation and oocyte maturation.”

Although PRP has been used in medicine for wound healing and tissue repair, its role in fertility treatment is still under investigation. Some clinical trials have shown improved ovarian reserve markers after PRP treatment, while others have not found a direct benefit for pregnancy rates. This study sheds light on how PRP affects cumulus cells, offering valuable insights into its potential for improving fertility treatments.

The researchers hope that further studies will help refine PRP treatments, determine the best protocols, and identify which patients may benefit the most. By understanding the molecular effects of PRP on ovarian cells, scientists may develop targeted fertility therapies to support women facing infertility due to diminished ovarian reserve.

DOI - https://doi.org/10.18632/aging.206202

Corresponding author - Emre Seli - emre.seli@yale.edu

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Platelet-Rich Plasma May Support Ovarian Function in Women with Poor Ovarian Response

BUFFALO, NY — March 18, 2025 — A new #research paper was #published by Aging (Aging-US) on March 7, 2025, titled “Accelerated aging associated with cancer characteristics and treatments among breast cancer survivors.”

Led by first author Cong Wang and corresponding author Xiao-Ou Shu from Vanderbilt University, this study examines how breast cancer and its treatments contribute to accelerated aging in survivors. Their study revealed that breast cancer patients show signs of faster biological aging compared to cancer-free individuals, with long-term effects lasting up to ten years post-diagnosis. This finding raises concerns about the potential lasting impact of cancer therapies on aging and overall health.

Breast cancer is one of the most common cancers in women worldwide, with improved treatments leading to longer survival rates. However, emerging evidence suggests that these treatments may also accelerate aging. The study used Phenotypic Age Acceleration (PAA), a biological marker that estimates a person’s aging rate based on blood tests. Researchers compared data from 1,264 breast cancer patients and 429 cancer-free controls. The results indicated that breast cancer survivors had significantly higher PAA at diagnosis and continued to show signs of accelerated aging up to ten years later.

“This is the first large study with 10 years of follow-up to evaluate PAA among BC survivors.”

The study found that tumor severity played a role in aging acceleration. Women with advanced-stage (Stage III/IV) or high-grade tumors showed the highest levels of aging acceleration. Additionally, treatments such as chemotherapy and endocrine therapy were linked to increased biological aging. One year after diagnosis, chemotherapy was associated with the most significant rise in PAA, while endocrine therapy had long-term effects, increasing aging markers even ten years after treatment.

Interestingly, not all cancer treatments had the same effect. Surgery and radiation therapy were associated with lower aging acceleration over time. These findings suggest that systemic therapies, which affect the whole body, may contribute more to aging-related changes than localized treatments.

The findings highlight the need for ongoing monitoring of breast cancer survivors beyond their initial recovery. Understanding how cancer treatments influence aging can help improve post-treatment care and potentially lead to strategies that reduce these effects. Further research is needed to explore whether lifestyle changes, medications, or other interventions could slow down aging in cancer survivors.

As the number of breast cancer survivors continues to grow, addressing the long-term health consequences of cancer treatment is crucial. This study provides valuable insights into how different factors contribute to accelerated aging, helping to shape future research and healthcare approaches for breast cancer survivors.

DOI - https://doi.org/10.18632/aging.206218

Corresponding author - Xiao-Ou Shu - xiao-ou.shu@vumc.org

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Breast Cancer Treatments Linked to Accelerated Aging in Survivors

BUFFALO, NY — March 25, 2025 — A new #research paper was #published in Aging (Aging-US) on January 31, 2025, in Volume 17, Issue 2, titled “Cysteinyl leukotriene receptor 1 modulates retinal immune cells, vascularity and proteolytic activity in aged mice.”

The study, led by first author and corresponding author Andreas Koller from the University Hospital of the Paracelsus Medical University, found that blocking an inflammatory receptor called CysLTR1 in the retinas of aging mice improved retinal health. These findings suggest a new approach to slowing age-related vision loss and protecting eye health in older adults.

Age-related vision problems are a growing concern worldwide, and inflammation plays a key role in damaging the retina over time. The retina is the part of the eye that captures light and sends visual signals to the brain, making it vital for clear eyesight. In this study, scientists focused on the CysLTR1 receptor, which is known to promote inflammation and is found in high amounts in the retina. They explored whether blocking this receptor could reduce the harmful effects of aging in the eye.

To achieve this, researchers treated aged mice with montelukast (MTK), a drug commonly used for asthma, which specifically blocks CysLTR1. The oral treatment lasted eight weeks and results were compared with both untreated aged mice and healthy young mice. After treatment, the older mice showed major improvements in retinal health.

One key finding was a reduction in immune cells called microglia, which tend to increase with age and contribute to chronic inflammation in the retina. With CysLTR1 blocked, the number of these immune cells dropped significantly, suggesting reduced retinal inflammation. Lower inflammation is linked to a lower risk of age-related eye diseases like macular degeneration.

“The reduction in immune cells caused by Cysltr1 suppression may dampen neuroinflammation, a known promoter of tissue aging.”

Another important result was the restoration of blood vessel function. The tiny blood vessels in the retina had narrowed in aging mice, reducing blood flow and oxygen supply to the eye. MTK treatment increased the diameter of these vessels, improving circulation and possibly helping the retina work more efficiently.

The study also indicated that blocking CysLTR1 helped boost the retina’s natural ability to clear out waste proteins. As we age, this cleaning process slows down, allowing harmful material to build up in the eye. After treatment, the aged mice had stronger proteasome activity—the system responsible for breaking down cellular waste—and fewer signs of waste accumulation.

Importantly, the treatment did not harm retinal nerve cells, which are essential for vision. This evidence indicates that the therapy was not only effective but also safe.

While more research is needed to confirm these results in humans, this study highlights the potential of repurposing MTK to protect against age-related vision decline. Because it is already an approved drug, testing it for age-related eye diseases like macular degeneration or diabetic retinopathy could move forward more quickly. Blocking inflammation and supporting the eye’s natural cleaning systems may be a promising new way to preserve healthy vision in aging populations.

DOI - https://doi.org/10.18632/aging.206193

Corresponding author - Andreas Koller - a.koller@salk.at

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Montelukast Improves Retinal Health in Aging Mice

BUFFALO, NY — April 7, 2025 — A new #research paper was #published in Aging (Aging-US) on March 18, 2025, in Volume 17, Issue 3, titled “Mitochondrial oxidative stress or decreased autophagy in osteoblast lineage cells is not sufficient to mimic the deleterious effects of aging on bone mechanoresponsiveness.”

Researchers from the University of Arkansas for Medical Sciences, led by first author Ana Resende-Coelho and corresponding authors Melda Onal and Maria Almeida, investigated why bones become less responsive to exercise as people age. They studied two well-known aging-related cellular changes: oxidative stress (a buildup of harmful molecules inside cells) and reduced autophagy (a slowdown in the cell’s ability to clean out and recycle damaged parts) to determine whether these could explain the decline in bone strength. Their findings revealed that these changes alone are not enough to account for the reduced bone-building response seen with aging.

Physical activity is known to strengthen bones by creating mechanical stress, which activates bone cells like osteocytes to promote new bone formation. However, this process becomes less effective with age, increasing the risk of bone loss and fractures in older adults. The study aimed to uncover why this response weakens over time by focusing on specific age-related changes inside bone-forming cells.

“The bone response to loading is less effective with aging, but the cellular and molecular mechanisms responsible for the impaired mechanoresponsiveness remain unclear.”

The research team used a well-established mouse model in which pressure was applied to the tibia, simulating the effects of exercise. As expected, bones from older mice showed a weaker response compared to those of younger mice. However, when the researchers examined younger mice genetically modified to have either high oxidative stress or impaired autophagy, as seen in aging, their bones still responded normally to mechanical loading.

The researchers also found that damage to the bone’s osteocyte network, a system of cells that helps sense and respond to mechanical forces, did not prevent a healthy bone-building response in mice with autophagy deficiencies. This challenges the long-standing idea that deterioration of this cell network is a main cause of age-related bone decline.

These results are significant because they eliminate two widely suspected causes of the aging skeleton’s reduced responsiveness to exercise. While oxidative stress and autophagy dysfunction are common in older bone, they are not solely responsible for its reduced ability to grow stronger under physical stress. The authors suggest that future studies should explore other possible factors, such as changes in energy metabolism or how bone cells communicate.

Overall, this study shows that bone aging is more complex than previously thought. Protecting bone health in older adults may require new strategies that go beyond targeting oxidative stress or autophagy.

DOI - https://doi.org/10.18632/aging.206213

Corresponding authors - Melda Onal - MOnal@uams.edu, and Maria Almeida - schullermaria@uams.edu

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Keywords - aging, Atg7, tibia compressive loading, Sod2, Osx1-Cre, osteocytes

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Osteoblast Stress Alone Fails to Explain Bone’s Weaker Response to Exercise in Aging

Breast cancer survivors are living longer than ever, thanks to research and medical advances, but new studies suggest that some treatments may come with a hidden cost: accelerated aging. A recent study, titled “Accelerated aging associated with cancer characteristics and treatments among breast cancer survivors,” published in Aging (Aging-US), reveals that breast cancer and its treatments may speed up biological aging, with effects lasting up to a decade post-diagnosis.

Breast Cancer and Aging

Breast cancer is one of the most common cancers among women worldwide. Medical advancements have dramatically improved survival rates, making it one of the most treatable forms of cancer. Yet, many survivors report lasting symptoms like fatigue, memory issues, and reduced vitality that resemble accelerated aging. This pattern has led scientists to investigate whether treatments for breast cancer might be contributing to biological age acceleration.

Full blog - https://aging-us.org/2025/04/breast-cancer-treatments-hidden-impact-accelerated-aging-among-survivors/

Paper DOI - https://doi.org/10.18632/aging.206218

Corresponding author - Xiao-Ou Shu - xiao-ou.shu@vumc.org

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Keywords - aging, accelerated aging, PhenoAge, breast cancer, survivors

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Breast Cancer Treatment’s Hidden Impact: Accelerated Aging Among Survivors

BUFFALO, NY — April 29, 2025 — A new #research paper was #published in Aging (Aging-US) Volume 17, Issue 3, on March 20, 2025, titled “Inhibition of the metalloprotease ADAM19 as a novel senomorphic strategy to ameliorate gut permeability and senescence markers by modulating senescence-associated secretory phenotype (SASP).”

Researchers, led by first author Sudipta Bar and corresponding authors Amit Sharma and Pankaj Kapahi from the Buck Institute for Research on Aging, have found that the enzyme ADAM19 plays an important role in regulating aging in cells and inflammation in the gut. Their study shows that blocking ADAM19 reduced gut damage and inflammation in fruit flies, mice, and human cells. This discovery points to a new possible way to treat gut disorders related to aging by reducing the harmful signals from senescent (aging) cells.

As individuals age, DNA damage can lead to the accumulation of senescent cells, contributing to tissue damage. These are cells that stop dividing and release harmful inflammatory substances called the senescence-associated secretory phenotype (SASP). In this study, researchers used fruit flies to search for genes involved in radiation-related gut damage. They identified a gene called meltrin, which is similar to human ADAM19. When meltrin was turned off, the flies had less gut leakage, less inflammation, and fewer signs of cellular aging.

“Through an unbiased genome-wide association study (GWAS) utilizing 156 strains from the Drosophila Genetic Reference Panel (DGRP), we identified meltrin (the drosophila orthologue of mammalian ADAM19) as a potential modulator of the senescence-associated secretory phenotype (SASP).”

To test if these results applied beyond flies, the team inhibited ADAM19 in mice using a drug called batimastat. Mice treated with the drug after chemotherapy exposure had stronger gut barriers and lower levels of inflammatory markers. The findings extended to human cell cultures, where ADAM19 inhibition reduced signs of cellular aging, including the expression of SASP proteins and β-galactosidase, a classic aging marker. 

Importantly, this approach does not kill aging cells like many 'senolytic' therapies but instead reduces the harmful substances they release, making it a potential "senomorphic" strategy. The study also showed that ADAM19 helps release certain SASP proteins by cutting them at the cell surface, suggesting a direct role in regulating inflammatory signals.

Through proteomic analysis, the team identified 12 SASP proteins that were significantly reduced when ADAM19 was blocked. Many of these proteins are linked to inflammation, immune response, and tissue remodeling in diseases such as inflammatory bowel disease and Crohn’s disease. This connection underlines the relevance of the findings for treating chronic gut disorders in aging populations.

By targeting ADAM19, researchers may have found a new way to protect gut health and lower inflammation caused by aging cells. This study offers a promising path for creating treatments that maintain healthy tissues without having to destroy aging cells, which could benefit people with gut damage related to aging or medical treatments.

DOI - https://doi.org/10.18632/aging.206224

Corresponding authors - Amit Sharma - amit.sharma@sens.org, and Pankaj Kapahi - pkapahi@buckinstitute.org

Video short - https://www.youtube.com/watch?v=dRfxQ20O2fQ

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Inhibiting ADAM19 Reduces Gut Inflammation and Cell Aging Markers Across Species

Cancer and aging are two sides of age-related tumorigenesis.

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