BUFFALO, NY—February 4, 2025 — A new #research paper was #published by Aging (Aging-US) on December 3, 2024, in Volume 17, Issue 1, titled “Topical ABT-263 treatment reduces aged skin senescence and improves subsequent wound healing.”

Researchers Maria Shvedova, Rex Jeya Rajkumar Samdavid Thanapaul,  Joy Ha, Jannat Dhillon, Grace H. Shin, Jack Crouch, Adam C. Gower, Sami Gritli, and Daniel S. Roh from Boston University Aram V. Chobanian and Edward Avedisian School of Medicine have discovered that a drug called ABT-263 can significantly improve wound healing in aging skin. When applied directly to the skin of older mice, ABT-263 helps clear out old, damaged cells, known as senescent cells, and speeds up the skin’s ability to heal after injury. This finding could lead to new treatments for slow-healing wounds in older adults, especially for post-surgical recovery and chronic wound care.

As people age, their bodies accumulate senescent cells—damaged cells that no longer function properly but refuse to die. The buildup of these cells in tissues like the skin slows down the body’s ability to heal after injuries. This study investigated whether ABT-263, a senolytic drug designed to target and remove senescent cells when applied topically, could enhance the skin’s natural healing process.

Researchers applied ABT-263 to the skin of aged mice for five days. The treated skin showed fewer signs of cellular aging, and when small wounds were created, they healed much faster compared to untreated mice. By day 24, 80% of the mice treated with ABT-263 had fully healed wounds, compared to just 56% of untreated mice.

Interestingly, ABT-263 triggered a brief spike of inflammation in the skin, which surprisingly helped the healing process. The inflammation seemed to “wake up” the skin’s repair systems, making them respond more quickly to wounds. Additionally, ABT-263 increased the activity of genes related to wound repair, such as those involved in collagen production and the growth of new blood vessels, both essential for skin strength and regeneration.

The study also found that ABT-263 selectively reduced senescent cells in aged mice without affecting young mice, suggesting the drug is particularly effective in older tissues where these damaged cells accumulate. Moreover, because ABT-263 was applied directly to the skin, it avoided the common side effects associated with oral senolytic drugs.

“Our study underscores the potential of topical senolytic treatments to enhance wound healing in aging skin, presenting a potentially promising strategy for preoperative care.”

While the results are promising, more research is needed to confirm whether this treatment is safe and effective for humans. However, this study represents an exciting step forward in regenerative medicine, opening new opportunities to improve wound healing in aging skin.

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

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

Video short - https://www.youtube.com/watch?v=AKS7sZyEChg

About Aging-US

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.

The journal aims to promote 1) treatment of age-related diseases by slowing down aging, 2) validation of anti-aging drugs by treating age-related diseases, and 3) prevention of cancer by inhibiting aging. (Cancer and COVID-19 are age-related diseases.)

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Aging (Aging-US)

ABT-263 Treatment Rejuvenates Aged Skin and Enhances Wound Healing

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

Video short - https://www.youtube.com/watch?v=AKS7sZyEChg

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

About Aging-US

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

In this installment of the Longevity & Aging Series, Dr. Julia Sidorova from the Department of Laboratory Medicine and Pathology at the University of Washington (Seattle, WA) joined host Dr. Evgeniy Galimov to discuss her co-authored research paper from Volume 16, Issue 20 of Aging (Aging-US), titled “Werner syndrome RECQ helicase participates in and directs maintenance of the protein complexes of constitutive heterochromatin in proliferating human cells.”

DOI - https://doi.org/10.18632/aging.206132

Corresponding Author - Julia M. Sidorova - julias@uw.edu

Video interview - https://www.youtube.com/watch?v=3yn8O-JA6GE

Abstract

Werner syndrome of premature aging is caused by mutations in the WRN RECQ helicase/exonuclease, which functions in DNA replication, repair, transcription, and telomere maintenance. How the loss of WRN accelerates aging is not understood in full. Here we show that WRN is necessary for optimal constitutive heterochromatin levels in proliferating human fibroblasts. Locally, WRN deficiency derepresses SATII pericentromeric satellite repeats but does not reduce replication fork progression on SATII repeats. Globally, WRN loss reduces a subset of protein-protein interactions responsible for the organization of constitutive heterochromatin in the nucleus, namely, the interactions involving Lamin B1 and Lamin B receptor, LBR. Both the mRNA level and subcellular distribution of LBR are affected by WRN deficiency, and unlike the former, the latter phenotype does not require WRN catalytic activities. The phenotypes of heterochromatin disruption seen in WRN-deficient proliferating fibroblasts are also observed in WRN-proficient fibroblasts undergoing replicative or oncogene-induced senescence. WRN interacts with histone deacetylase 2, HDAC2; WRN/HDAC2 association is mediated by heterochromatin protein alpha, HP1α, and WRN complexes with HP1α and HDAC2 are downregulated in senescing cells. The data suggest that the effect of WRN loss on heterochromatin is separable from senescence program, but mimics at least some of the heterochromatin changes associated with it.

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Keywords - aging, Werner progeria, heterochromatin, senescence, nuclear lamina, satellite repeats

About Aging-US

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.

The journal aims to promote 1) treatment of age-related diseases by slowing down aging, 2) validation of anti-aging drugs by treating age-related diseases, and 3) prevention of cancer by inhibiting aging. (Cancer and COVID-19 are age-related diseases.)

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Longevity & Aging Series (S3, E2): Dr. Julia Sidorova

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

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BUFFALO, NY — July 15, 2025 — A new #research paper was #published in Aging (Aging-US) Volume 17, Issue 6, on June 5, 2025, titled “Senescence caused by telomerase inactivation in myeloid, mesenchymal, and endothelial cells has distinct effects on cancer progression.”

In this study, first author Joseph Rupert, along with corresponding author Mikhail G. Kolonin and colleagues from The Brown Foundation Institute of Molecular Medicine for the Prevention of Human Diseases, McGovern Medical School, at The University of Texas Health Sciences Center at Houston, investigated how aging-related changes in different cell types affect cancer progression. By turning off telomerase in specific cell populations in mice, the researchers discovered that cell aging, or senescence, can slow primary tumor growth but also trigger unexpected effects. This work sheds light on the complex relationship between aging cells and cancer and may help guide future anti-cancer strategies.

The team used genetically modified mice to deactivate telomerase, the enzyme that maintains chromosome ends, specifically in immune, connective tissue, and blood vessel cells. This caused these cells to enter a state of senescence, where they stop dividing and release inflammatory signals. The researchers then implanted breast, prostate, and pancreatic cancer cells into the mice and tracked how tumors developed. They found that when telomerase was inactivated in immune cells or connective tissue cells, tumors grew more slowly. However, these tumors showed signs of increased tissue damage and potential aggressiveness.

Interestingly, when telomerase was turned off in endothelial cells, which cover blood vessels, tumors shrank and became poorly supplied with blood, leading to oxygen deprivation. In the case of pancreatic cancer cells, this low-oxygen environment made them more likely to spread to the liver, highlighting a potential risk of targeting these cells.

“[…] this study shows that senescence and metabolic dysfunction resulting from telomerase inactivation in distinct cells in the tumor microenvironment have different effects on tumor growth and metastasizing of carcinomas.”

This research provides important insights into how aging cells within the tumor microenvironment (TME) influence cancer behavior. While senescence in certain cell types can help suppress tumor growth, it may also create conditions that favor cancer metastasis. These findings highlight the need to consider cell type-specific effects when developing therapies that target senescent cells. By mapping how different cell populations contribute to cancer progression in aging tissues, this study opens the door for more precise approaches to prevent both tumor growth and spread.

DOI - https://doi.org/10.18632/aging.206268

Corresponding author - Mikhail G. Kolonin - mikhail.g.kolonin@uth.tmc.edu

Video short - https://www.youtube.com/watch?v=py8wFKj7enE

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Keywords - aging, senescence, telomerase, myeloid, mesenchymal, endothelial

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How Telomerase Inactivation in Aging Cells Influences Cancer Growth and Metastasis

BUFFALO, NY — August 27, 2025 — A new #research paper was #published in Volume 17, Issue 7 of Aging (Aging-US) on July 24, 2025, titled “RNA-binding protein AUF1 suppresses cellular senescence and glycolysis by targeting PDP2 and PGAM1 mRNAs.”

In this study, Hyejin Mun, Chang Hoon Shin, Mercy Kim, Jeong Ho Chang, and Je-Hyun Yoon from the University of Oklahoma and Kyungpook National University investigated how changes in cellular metabolism contribute to aging. Their findings offer potential targets for therapies aimed at slowing or reducing the effects of aging.

As cells age, they often lose their ability to divide and begin releasing harmful signals that damage nearby tissues. This process, called cellular senescence, is linked to many age-related diseases. A key feature of senescent cells is their altered metabolism, where they use more glucose and oxygen, even when oxygen levels are low. This leads to the production of inflammatory substances and fatty acids, which can accelerate tissue damage. The study examined how these metabolic changes are controlled at the molecular level.

Researchers found that AUF1, a protein that binds to RNA, normally helps prevent aging by breaking down two enzymes involved in glucose metabolism: PGAM1 and PDP2. When AUF1 is missing or inactive, these enzymes build up. This causes the cell to produce more energy and inflammatory molecules, which are common features of senescent cells.

“Our high throughput profiling of mRNAs and proteins from Human Diploid Fibroblasts (HDFs) revealed that the expression of pyruvate metabolic enzymes is inhibited by the anti-senescent RNA-binding protein (RBP) AUF1 (AU-binding Factor 1).”

The team also identified another protein, MST1, which becomes active during cellular stress and aging. MST1 modifies AUF1 in a way that stops it from doing its protective job. As a result, PGAM1 and PDP2 accumulate, leading to faster aging of the cell. Experiments using human fibroblast cells and mouse models confirmed that higher levels of these enzymes are linked to stronger signs of cellular aging.

These findings improve our understanding of how metabolism affects the aging process. They highlight the MST1-AUF1-PDP2/PGAM1 pathway as a key factor in the metabolic shift seen in aging cells. Since these enzymes and proteins are already known to be involved in other diseases, existing or future therapies might be used to block this pathway and reduce the effects of aging.

This study offers a new direction for senotherapy—a field focused on treating or removing aging cells. By adjusting glucose metabolism through AUF1 and its targets, scientists believe it may be possible to slow aging or limit its effects on tissue function. More research is needed, but these insights could lead to new strategies for managing age-related diseases and promoting healthier aging.

DOI - https://doi.org/10.18632/aging.206286

Corresponding authors - Jeong Ho Chang - jhcbio@knu.ac.kr, and Je-Hyun Yoon - jehyun-yoon@ouhsc.edu

Video short - https://www.youtube.com/watch?v=Gbu6USUSkgg

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Keywords - aging, AUF1, MST1, senescence, glycolysis

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AUF1 Protein Plays Anti-Aging Role by Regulating Cellular Metabolism

BUFFALO, NY — September 2, 2025 — A new #research paper featured on the #cover of Volume 17, Issue 8 of Aging (Aging-US) was #published on July 30, 2025, titled “Exosomes released from senescent cells and circulatory exosomes isolated from human plasma reveal aging-associated proteomic and lipid signatures.”

In this study, led by first authors Sandip Kumar Patel and Joanna Bons, along with corresponding author Birgit Schilling from The Buck Institute for Research on Aging, researchers found that exosomes—tiny particles released by cells—carry molecular signatures that indicate both biological aging and cellular senescence. These signatures include proteins, lipids, and microRNAs associated with inflammation, oxidative stress, and tissue remodeling. The findings could enhance our understanding of biological aging and help in developing future anti-aging therapies.

Senescence is a state in which cells stop dividing but remain metabolically active. These cells often release harmful substances, known collectively as the senescence-associated secretory phenotype (SASP), that can affect nearby tissues. This study shows that exosomes are an important component of this secretory profile.

The researchers analyzed exosomes from senescent human lung cells and from the blood plasma of both young and older adults. They identified over 1,300 proteins and 247 lipids within these particles. Many of these molecules were significantly altered with age.

“In parallel, a small human plasma cohort from young (20–26 years) and old (65–74 years) individuals revealed 1,350 exosome proteins and 171 plasma exosome proteins were altered in old individuals.”

Exosomes from older individuals contained more inflammation-related proteins and fewer antioxidants, while those from senescent cells showed lipid changes associated with membrane integrity and cellular stress. These changes suggest that exosomes may play a role in spreading senescence to nearby cells, a process known as secondary senescence.

The study also identified distinct patterns in microRNAs—small molecules that regulate gene expression—found in the blood of older adults. Some of these, including miR-27a and miR-874, have previously been associated with cognitive decline and chronic illnesses, highlighting their potential as biomarkers for biological aging.

Although the study involved a limited number of samples, it provides strong early evidence that exosomes reflect the molecular changes associated with aging. By showing how these particles carry and possibly spread aging-related signals throughout the body, the research opens new possibilities for diagnosing and treating age-related diseases.

DOI - https://doi.org/10.18632/aging.206292

Corresponding author - Birgit Schilling – bschilling@buckinstitute.org

Video short - https://www.youtube.com/watch?v=tcyAZahw-g8

Keywords - aging, proteomics, senescence, exosomes, data-independent acquisitions

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New Study Links Exosomes to Biological Aging

As the global population grows older, understanding what drives the aging process is becoming increasingly important. Diseases like Alzheimer’s, cardiovascular conditions, and cancer are more common with age, yet many current treatments only manage symptoms rather than addressing the underlying biological causes.

One contributor to aging is the buildup of “senescent” cells—cells that have stopped dividing but do not die. These cells can harm nearby tissues by releasing molecular signals, a process known as secondary senescence.

Scientists have found that senescent cells release tiny particles called exosomes. A research team from The Buck Institute for Research on Aging recently discovered that these exosomes carry aging-related messages through the bloodstream. Their study, titled “Exosomes released from senescent cells and circulatory exosomes isolated from human plasma reveal aging-associated proteomic and lipid signatures,” was featured as the cover article in Aging (Aging-US), Volume 17, Issue 8.

Full blog - https://aging-us.org/2025/09/how-exosomes-spread-aging-signals-and-could-support-anti-aging-research/

Paper DOI - https://doi.org/10.18632/aging.206292

Corresponding author - Birgit Schilling - bschilling@buckinstitute.org

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Keywords - aging, proteomics, senescence, exosomes, data-independent acquisitions

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How Exosomes Spread Aging Signals and Could Support Anti-Aging Research

Aging-US is dedicated to advancing our understanding of the biological mechanisms that drive aging and the development of age-related diseases. Our mission is to serve as a platform for high-quality research that uncovers the cellular, molecular, and systemic processes underlying aging, and translates these insights into strategies to extend healthspan and delay the onset of chronic disease.

Read about the Aging (Aging-US) Scientific Integrity Process: https://aging-us.com/scientific-integrity

New tracks tagged #senescence