This time on LE 101, Veera discusses another primary hallmark of aging, epigenetic alterations, which affect the switches that turn genes on and off – and may be surprisingly easy to reverse.

DNA damage, which results in genomic instability, is one of the primary hallmarks of aging. Today, we want to highlight an recent open access review that explores the DNA damage response during aging. The role of DNA damage Some researchers have long suggested that damage to our DNA is a major reason why we age…

A team of researchers, including Drs. Vadim Gladyshev and Steve Horvath, recently published a review of DNA methylation aging clocks, which use biomarkers to determine the biological age of a person. Aging causes epigenetic alterations to occur, including changes to DNA methylation, histone modification, transcriptional alterations (variance in gene expression), and remodeling of chromatin (a…

A recent open-access study published in Cell Stem Cell has shown that excluding Oct4 from the OSKM cocktail reduces epigenetic aberrations and off-target gene activation. Induced pluripotency and Yamanaka factors Pluripotent stem cells are cells that can become other cell types in the body; during natural development, they create differentiated stem cells and ultimately somatic…

A team of researchers, including Dr. David Sinclair, has recently made a new study available as a preprint prior to peer review and publication in the journal Cell. DNA damage and the double-strand break Two of the primary hallmarks of aging are genomic instability, which consists of damage to our DNA, and epigenetic alterations, which…

Today, we want to draw attention to a new study that shows how partial cellular reprogramming was able to reverse cellular aging and address age- and injury-induced blindness in mice. Epigenetic alterations One of the proposed reasons we age is the changes to gene expression that our cells experience as we get older; these are…

Researchers have shown that many interventions known to increase lifespan also share similar gene expression profiles, and this knowledge may help pave the way for identifying new interventions to increase healthy lifespan and delay the diseases of aging. Identifying longevity signatures A team of researchers, including Professor Vadim Gladyshev from Harvard Medical School, has just…

One of the biggest breakthroughs in biology in the last few decades has been the discovery of epigenetics. Rather than changing the genes themselves, epigenetics change how genes are expressed, allowing our cells to differentiate between their various types. However, the epigenetics of our cells change over time. There is some debate over how much…

A new publication highlights how the complex interaction of NAD+ and cellular senescence pathways may complicate proposed anti-aging therapies that boost NAD+ using precursors. What are epigenetic alterations? One of the proposed reasons we age is the changes to gene expression that our cells experience as we get older; these are commonly called epigenetic alterations….

The researchers of a new publication take a look at the effects of obesity on aging and consider its impact in the context of the Hallmarks of Aging, a popular theory that breaks down aging into nine distinct processes. The case for obesity accelerating aging Being overweight and carrying excessive amounts of visceral fat, a…

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