Search Results for: senesc

The next phase of reversing aging and immunosenescent trends

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Dr. Greg Fahy earlier this week provided an update on the November 2020 TRIIM-X follow-on to the September 2019 TRIIM curated in Reversal of aging and immunosenescent trends. Emphasis was on reproducibility: 23:45 Dr. Steve Horvath reanalyzed TRIIM for the plasma portion of Levine’s PhenoAge epigenetic clock. Results were congruent with four other epigenetic clocks … Continue reading The next phase of reversing aging and immunosenescent trends

Part 2 of Reversal of aging and immunosenescent trends with sulforaphane

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Reversal of aging and immunosenescent trends with sulforaphane covered only the first 13 minutes of a super informative presentation by the lead researcher of clinical trial Reversal of aging and immunosenescent trends.  Commonalities with sulforaphane research were found by PubMed searches of sulforaphane and each presentation topic, and used a 1/1/2015 publication date cutoff. Continuing … Continue reading Part 2 of Reversal of aging and immunosenescent trends with sulforaphane

Reversal of aging and immunosenescent trends with sulforaphane

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Sulforaphane research findings have commonalities with a super informative presentation by the lead researcher of clinical trial Reversal of aging and immunosenescent trends. I did a PubMed search of sulforaphane and each presentation topic, and used a 1/1/2015 publication date cutoff. Presentation topics through the first 13 minutes were: Thymus – no recent sulforaphane studies … Continue reading Reversal of aging and immunosenescent trends with sulforaphane

Organismal aging and cellular senescence

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I’ll curate this 2019 German review through its figures: “With the discovery of beneficial aspects of cellular senescence and evidence of senescence being not limited to replicative cellular states, a redefinition of our comprehension of aging and senescence appears scientifically overdue. Figure 1. Current determinants and relevant open questions, marking the processes of aging and … Continue reading Organismal aging and cellular senescence

Reversal of aging and immunosenescent trends

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The title of this post is essentially the same as the 2019 human clinical trial: “Epigenetic aging can be reversed in humans. Using a protocol intended to regenerate the thymus, we observed protective immunological changes, improved risk indices for many age‐related diseases, and a mean epigenetic age approximately 1.5 years less than baseline after 1 … Continue reading Reversal of aging and immunosenescent trends

Cell senescence and DNA methylation

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This 2018 Baltimore cell study found: “Based on similarities in overall methylation patterns in replicative senescence and cancers, it is hypothesized that tumor-promoting DNA methylation in cancers derives from cells escaping senescence. We show that the tumor-associated methylation changes evolve independently of senescence and are pro-survival events with functional implications contrasting that in senescence. In … Continue reading Cell senescence and DNA methylation

Using an epigenetic clock to distinguish cellular aging from senescence

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The 2016 UK/UCLA human study found: “Induction of replicative senescence (RS) and oncogene-induced senescence (OIS) are accompanied by ageing of the cell. However, senescence induced by DNA damage is not, even though RS and OIS activate the cellular DNA damage response pathway, highlighting the independence of senescence from cellular ageing. We used primary endothelial cells … Continue reading Using an epigenetic clock to distinguish cellular aging from senescence

Ancient parasite DNA within us

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Two 2023 papers on endogenous retroviruses (ERVs) and aging relationships, starting with the Introduction section of a comprehensive study: “Several causal determinants of aging-related molecular changes have been identified, such as epigenetic alterations and stimulation of senescence-associated secretory phenotype (SASP) factors. Although the majority of these studies describe aging determinants originating primarily from protein-coding genes, … Continue reading Ancient parasite DNA within us

What do we know about human aging from mouse models?

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Here is a 2021 rodent study and relevant parts from 3 of its 26 citing papers: “A long line of evidence has established the laboratory mouse as the prime model of human aging. However, relatively little is known about detailed behavioral and functional changes that occur across their lifespan, and how this maps onto the … Continue reading What do we know about human aging from mouse models?

Measuring epigenetic DNA causes

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This 2022 human cell study investigated DNA methylation and aging: “Models based on DNA methylation can be used to predict the age of biological samples, but their interpretability is limited due to the lack of causal inferences. Neither existing epigenetic clocks nor DNA methylation changes are enriched in causal CpG sites. Causal CpGs include similar … Continue reading Measuring epigenetic DNA causes

How to measure biological age?

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As mentioned in Week 127, I had biological age measured earlier this month, and received five reports two days ago on Sunday. Part of the company’s process is to follow up their reports (intrinsic aging, immune aging, pace of aging, telomere length, weight loss) with a consulting session to review and interpret, which lasted an … Continue reading How to measure biological age?

Epigenetic clocks so far in 2022

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2022’s busiest researcher took time out this month to update progress on epigenetic clocks. If I curated every study he’s contributed to, it would require at least three blog posts a week. I’ll link to a few he’s posted in August 2022 that are more appreciated in the researcher community. “In my lab, we are … Continue reading Epigenetic clocks so far in 2022

Broccoli sprouts and your brain

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A 2022 review of Nrf2 signaling hilariously avoided mentioning sulforaphane, although of ~4,000 sulforaphane published articles, two were cited. I’ll curate it anyway to highlight referenced brain effects. “A good stability of NRF2 activity is crucial to maintain redox balance and therefore brain homeostasis. In this review, we have gathered recent data about the contribution … Continue reading Broccoli sprouts and your brain

Variable aging measurements

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Two papers on aging measurements, starting with a 2022 human study: “We collected longitudinally across the adult age range a comprehensive list of phenotypes within four domains (body composition, energetics, homeostatic mechanisms and neurodegeneration / neuroplasticity) and functional outcomes. We integrated individual deviations from population trajectories into a global longitudinal phenotypic metric of aging. We … Continue reading Variable aging measurements

CD38 and balance

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I’ll highlight this 2022 review’s relationships between inflammation and cluster of differentiation 38: “We review the nicotinamide adenine dinucleotide (NAD) catabolizing enzyme CD38, which plays critical roles in pathogenesis of diseases related to infection, inflammation, fibrosis, metabolism, and aging. NAD is a cofactor of paramount importance for an array of cellular processes related to mitochondrial … Continue reading CD38 and balance