Groundbreaking study reveals how to naturally reduce the signs of aging – The Brighter Side of News
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The study highlights the discovery of a small molecule capable of restoring normal levels of telomerase reverse transcriptase. (CREDIT: CC BY-SA 4.0)
Researchers at The University of Texas MD Anderson Cancer Center have identified a potential breakthrough in the fight against aging. By restoring youthful levels of a key component of the telomerase enzyme, they have successfully reversed aging-related symptoms in laboratory models.
If these findings translate to humans, they could pave the way for treatments targeting age-related conditions such as Alzheimer’s, Parkinson’s, heart disease, and cancer.
The study, published in Cell, highlights the discovery of a small molecule capable of restoring normal levels of telomerase reverse transcriptase (TERT). Typically suppressed with age, TERT plays a crucial role in cellular function.
Maintaining TERT levels in older lab models reduced cellular aging, decreased tissue inflammation, stimulated neuron growth, and improved both memory and neuromuscular function. These improvements led to increased strength and coordination.
Beyond its role in extending telomeres—the protective caps at the ends of chromosomes—TERT also functions as a transcription factor. This means it influences the expression of numerous genes linked to neurogenesis, learning and memory, cellular aging, and inflammation. Its regulatory role extends far beyond telomere maintenance, affecting fundamental processes that decline with age.
“Epigenetic repression of TERT plays a major role in the cellular decline seen at the onset of aging by regulating genes involved in learning, memory, muscle performance, and inflammation,” said Ronald DePinho, M.D., professor of Cancer Biology and the study’s corresponding author. “By pharmacologically restoring youthful TERT levels, we reprogrammed the expression of those genes, resulting in improved cognition and muscle performance while eliminating hallmarks linked to many age-related diseases.”
Aging is associated with various epigenetic changes that contribute to physiological decline. One of the most well-known hallmarks of aging is the gradual shortening of telomeres, which are essential for maintaining chromosome stability. Over time, oxidative stress and free radicals can damage telomeres, accelerating cellular deterioration.
Once telomeres become critically short or damaged, cells enter a state of persistent DNA damage response, triggering senescence. Senescent cells then secrete inflammatory molecules that contribute to tissue degeneration, further driving the aging process and increasing the risk of diseases such as cancer.
Telomerase is the enzyme responsible for synthesizing and extending telomeres. However, its activity decreases over time due to the epigenetic silencing of TERT, especially as we naturally age or develop age-related diseases like Alzheimer’s.
DePinho’s lab previously showed that turning off the TERT gene led to premature aging, which could be reversed by reactivating TERT. They found that certain cells, like neurons and cardiac cells, were rejuvenated without needing to divide and synthesize telomeres. This led them to hypothesize that TERT had other roles beyond telomere synthesis and that overall telomerase levels were crucial in the aging process.
The researchers, led by DePinho and first author Hong Seok Shim, Ph.D., developed a drug to restore TERT levels. They screened over 650,000 compounds and found a small molecule TERT activating compound (TAC) that epigenetically de-represses the TERT gene, restoring its youthful levels.
In lab models equivalent to humans over 75 years old, six months of TAC treatment led to new neuron formation in the hippocampus, the brain’s memory center, and improved performance on cognitive tests. TAC also increased the expression of genes involved in learning, memory, and synaptic biology, consistent with TERT’s role in controlling the activity of transcription factor complexes that regulate diverse genes.
TAC treatment significantly reduced inflammaging, an age-related increase in inflammatory markers linked to multiple diseases, in both blood and tissue samples. It also eliminated senescent cells by repressing the p16 gene, a key factor in cellular aging.
The treatment improved neuromuscular function, coordination, grip strength, and speed in the models, effectively reversing sarcopenia, a condition where muscle mass and performance decline with age. TAC also increased telomere synthesis and reduced DNA damage at telomeres in human cell lines, extending the cells’ proliferative potential.
“These preclinical results are encouraging, as TAC is easily absorbed by all tissues, including the central nervous system. Yet further studies are needed to properly assess its safety and activity in long-term treatment strategies,” DePinho said. “However, our deeper understanding of the molecular mechanisms driving the aging process has uncovered viable drug targets, allowing us to explore opportunities to interc
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