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Researchers Successfully Rewind Epigenetic Age of Human Blood Cells into Neural Stem Cells

Researchers Successfully Rewind Epigenetic Age of Human Blood Cells into Neural Stem Cells

Researchers have successfully converted human blood cells into neural stem cells, effectively rewinding their epigenetic age. This process, known as direct conversion, bypasses the pluripotent state typically required for induced pluripotent stem cells (iPSCs). The study, published in Aging Cell, tracked the transformation of peripheral blood cells from donors ranging from newborns to a 101-year-old individual. The team, led by investigators at the University of Bonn, used a Sendai virus system to deliver two transcription factors, SOX2 and cMYC, into erythroid progenitor cells. While early neural markers appeared within days, the full transcriptional and epigenetic remodeling continued for weeks. The converted induced neural stem cells (iNSCs) at low passage carried a DNA methylation age averaging only about thirteen percent of the donor’s chronological age, and in established lines, less than five percent. This de-aging process was surprisingly slow, unfolding over approximately fifty days, in contrast t...

High-Intensity Interval Training Shows Significant Anti-Aging Benefits in Female Mice Study

High-Intensity Interval Training Shows Significant Anti-Aging Benefits in Female Mice Study

A new study published in the journal GeroScience indicates that high-intensity interval training (HIIT) can significantly counteract age-related decline in aged female mice. The research, led by Ted G. Graber of East Carolina University, along with colleagues Drew Theobald, Srinivas Sriramula, and Lisandra de Castro Braz, found that a 14-week HIIT program preserved strength and endurance, improved executive function, lowered blood pressure, and reversed fibrotic scarring in the heart of the mice. This study is notable for its focus on female animals, addressing a gap in preclinical exercise-aging literature, as males and females age differently. The experiment involved 21 virgin female C57BL/6J mice aged to 20 months, with 18 randomized into either a HIIT group or a sedentary control group. The training protocol was personalized and progressive, with interval speeds adjusted to each mouse's maximum treadmill speed. By the study's conclusion, trained mice showed a 71% increase in aerobic capacity and mainta...

Epigenetic Aging Markers Show Promise in Predicting Disease and Mortality

Epigenetic Aging Markers Show Promise in Predicting Disease and Mortality

Epigenetic measures, such as DunedinPACE, which estimate the pace of biological aging from DNA methylation patterns, are increasingly capable of predicting death and major diseases. These 'epigenetic clocks' integrate the effects of social, environmental, and behavioral exposures, capturing differences in both health and life history. Researchers are also developing new aging clocks, including one based on images of hematopoietic stem cell nuclei, which utilizes machine learning to identify age-related structural changes in nuclear DNA. These structural changes, regulated by epigenetic modifications, determine gene expression and are characteristic of aging. The functional decline of the hematopoietic system with age impacts overall organismal function and contributes to reduced healthspan, making the quantification of hematopoietic aging highly relevant for scientific and clinical applications. The ChromAgeNet framework, a deep learning approach, has been developed to model changes in chromatin organizati...

Researchers Identify Mechanism for Clearing 'Zombie Cells' to Combat Aging and Disease

Researchers Identify Mechanism for Clearing 'Zombie Cells' to Combat Aging and Disease

A new study led by researchers at Albert Einstein College of Medicine has identified a mechanism by which the body can clear harmful 'zombie cells,' formally known as senescent cells. These cells accumulate with age, contributing to chronic inflammation and age-related diseases. The research, published in Nature Aging, found that a decline in chaperone-mediated autophagy (CMA), a cellular recycling process, impairs both the zombie cells themselves and the immune cells responsible for their removal. By restoring CMA activity, the researchers observed a reduction in senescent-cell buildup and a decrease in the severity of lung fibrosis in mice. The study suggests that instead of solely focusing on senolytic drugs to kill these cells, restoring the body's natural clearance mechanisms through CMA activation could be a viable strategy. The team previously developed a small-molecule CMA activator, CA77.1, which showed promising results in aged mice by reducing zombie cell accumulation and signs of inflammation a...

Plant-Derived Growth Factors Offer Animal-Free Production for Biomedical and Cultivated Meat Industries

Plant-Derived Growth Factors Offer Animal-Free Production for Biomedical and Cultivated Meat Industries

Plant-Derived Growth Factors Offer Animal-Free Production for Biomedical and Cultivated Meat Industries

Smoking Cessation Linked to Reversal of Biological Aging, Study Finds

Smoking Cessation Linked to Reversal of Biological Aging, Study Finds

A new study published in the journal GeroScience indicates that quitting smoking can substantially reverse the biological aging caused by cigarettes. Researchers analyzed nationally representative data from 1,911 U.S. adults aged 50 to 84, participating in the National Health and Nutrition Examination Survey (NHANES) between 1999 and 2002. The study, led by Yeonju Kim and Habyeong Kang of Hanyang University in Seoul, focused on DNA methylation measurements, which are chemical modifications on DNA that serve as epigenetic aging clocks. These clocks estimate biological age based on methylation patterns. The findings consistently showed that current smokers had the highest epigenetic age acceleration. Crucially, former smokers exhibited a dose-response relationship: the longer they had abstained from smoking, the lower their epigenetic age acceleration. This pattern was observed across six different generations of aging clocks, with the strongest effects seen in GrimAge2 and DunedinPoAm, which are closely lin...

Bora Biologics and Protect Animal Health Partner for Antibody-Based Animal Health Products

Bora Biologics and Protect Animal Health Partner for Antibody-Based Animal Health Products

Bora Biologics and Protect Animal Health Partner for Antibody-Based Animal Health Products

Einstein Researchers Uncover Mechanism Behind 'Zombie Cell' Accumulation with Age, Proposing New Therapeutic Strategy

Einstein Researchers Uncover Mechanism Behind 'Zombie Cell' Accumulation with Age, Proposing New Therapeutic Strategy

Researchers at Albert Einstein College of Medicine have identified a key mechanism explaining why 'senescent cells,' often referred to as 'zombie cells,' accumulate in the body with age. These cells, which have ceased dividing but remain in tissues, contribute to chronic inflammation and age-related diseases. The study, published in Nature Aging, reveals that a decline in chaperone-mediated autophagy (CMA), a cellular recycling process, impairs both the senescent cells themselves and the immune cells (macrophages) responsible for clearing them. Experiments in mice demonstrated that restoring CMA activity reduced the buildup of these zombie cells and mitigated signs of inflammation and fibrosis. The research also found that senescent cells from older mice, unlike those from younger mice, failed to increase CMA activity, leading to the secretion of toxic substances that can 'zombify' healthy cells and hinder macrophage function. Human lung tissue analysis suggests these findings are relevant to conditions li...

Transplanted Hearts Assimilate Biological Age of Recipients, Potentially Expanding Organ Donor Pool

Transplanted Hearts Assimilate Biological Age of Recipients, Potentially Expanding Organ Donor Pool

A new preprint study led by molecular biologist Jesse Poganik of Harvard Medical School suggests that the biological age of a transplanted heart is strongly influenced by its new host body. The research, which involved both mouse experiments and the analysis of archived human heart tissue, found that older hearts transplanted into younger recipients showed signs of biological rejuvenation, while younger hearts placed in older bodies exhibited accelerated aging. The study utilized epigenetic clocks, which measure DNA methylation patterns, to estimate biological age. In mouse experiments, donor hearts began to assimilate the biological age of their new body within four to six months. Intriguingly, the recipient's original heart, liver, and blood were largely unaffected by the transplanted heart's age. Similar findings were observed in a small sample of 11 human heart transplant recipients, where the biological ages of the transplanted hearts were more closely associated with the recipients' ages than the don...

Epigenetic Clocks Validated in West Africa, Confirming Predictability of Biological Aging and Mortality Risk

Epigenetic Clocks Validated in West Africa, Confirming Predictability of Biological Aging and Mortality Risk

A new study conducted in Côte d’Ivoire, West Africa, has validated the effectiveness of epigenetic clocks in estimating biological age and predicting health decline in a diverse population. This research, published in Epigenetics Communications, is among the first to test these molecular timekeepers in a West African context, where populations are undergoing rapid epidemiological transitions. The study utilized DNA methylation patterns from 393 adults aged 18 to 79, computing four widely used epigenetic clocks: HorvathAge, HannumAge, PhenoAge, and GrimAge. The findings indicate strong correlations between epigenetic age and chronological age across all measures, with Pearson coefficients ranging from 0.83 to 0.93. HannumAge proved most accurate, deviating by less than two years on average, while HorvathAge overestimated by nearly six years. The study also revealed that these clocks capture distinct aspects of biological aging, with correlations between acceleration measures ranging from 0.24 to 0.66. Men s...

Dr. David Sinclair Advocates for Healthspan Over Lifespan Through Foundational Lifestyle Changes

Dr. David Sinclair Advocates for Healthspan Over Lifespan Through Foundational Lifestyle Changes

Dr. David Sinclair Advocates for Healthspan Over Lifespan Through Foundational Lifestyle Changes

Centenarian Offspring Exhibit Delayed Mortality and Reduced Age-Related Disease Risk, Study Finds

Centenarian Offspring Exhibit Delayed Mortality and Reduced Age-Related Disease Risk, Study Finds

A recent study published in the JAMA Network Open journal indicates that individuals with at least one parent who lived to be 100 years old are significantly more likely to experience delayed mortality and a reduced risk of age-related diseases. The research analyzed data from 4,030 participants across three independent longitudinal cohorts: LonGenity in the New York City area, the New England Centenarian Study throughout the U.S., and the UK Biobank. Researchers compared offspring whose parents reached 100 years of age with those whose parents died by age 73. The findings revealed that children of centenarians had a lower risk of developing cardiovascular disease, high blood pressure, and early death. This comprehensive study aimed to expand on previous research, which often focused on limited populations, to better understand the genetic and environmental mechanisms contributing to healthy aging. Only an estimated 101,000 centenarians, representing 0.03% of the U.S. population, reach their 100th birthday...