Organismal aging and cellular senescence

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

Cell senescence and DNA methylation

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

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

Take responsibility for your one precious life – DHEA

This 2020 meta-analysis subject was DHEA: “Twenty-four qualified trials were included in this meta-analysis. Statistically significant increases in serum IGF-1 levels were found only in participants who were: Women; or Supplementing 50 mg/d; or Undergoing intervention for > 12 weeks; or Without an underlying comorbidity; or Over the age of 60 years. DHEA supplementation led … Continue reading Take responsibility for your one precious life – DHEA

Eat broccoli sprouts for your hair!

This 2017 review explored broccoli sprout compounds effects on head hair: “Skin appendages, notably hair follicles (HFs), can be exposed to high levels of reactive oxygen species (ROS), which are generated through metabolic reactions occurring mostly in the mitochondria, peroxisomes and the endoplasmic reticulum as well as in the plasma membrane. Despite their involvement in … Continue reading Eat broccoli sprouts for your hair!

A cherry-picked DNA methylation study

This 2020 US/Sweden/Denmark human study measured twins during their old age: “We evaluate individual differences in DNA methylation at individual CpG sites across the methylome across 10 years in two Scandinavian samples of same‐sex aging twins. We test two competing hypotheses about the longitudinal stability and change in DNA methylation: The contribution of genetic influences … Continue reading A cherry-picked DNA methylation study

Take responsibility for your one precious life – Vitamin D3

Where to start among 6,489 studies and reviews published during the past five years, results from a PubMed search of “dihydroxyvitamin D3.” How about: “Vitamin D plays a fundamental role in body calcium and phosphorous homeostasis, ensuring proper functioning of the skeletomuscular system. Pleiotropic activities include: Anti-inflammatory and immunomodulatory properties (predominantly downregulation of adaptive and … Continue reading Take responsibility for your one precious life – Vitamin D3

Day 70 results from Changing to a youthful phenotype with broccoli sprouts

Here are my Day 70 measurements* to follow up Our model clinical trial for Changing to a youthful phenotype with broccoli sprouts, which had these findings: Keep in mind that I’m not in the population represented by the clinical trial sample: My chronological age is above their inclusion range; My BMI is below their inclusion … Continue reading Day 70 results from Changing to a youthful phenotype with broccoli sprouts

Part 3 of Rejuvenation therapy and sulforaphane

Part 1 focused on the study’s clinical biomarkers. Part 2 highlighted its epigenetic clocks. Now we’ll look at rejuvenation of cognitive function. Charts for this study’s most relevant human aging applications – measured by the new human-rat relative biological age clock – were in supplementary data due to combining the study’s untreated tissue samples into … Continue reading Part 3 of Rejuvenation therapy and sulforaphane

An environmental signaling paradigm of aging

To follow up A rejuvenation therapy and sulforaphane, the study’s lead laboratory researcher – Dr. Harold Katcher – provided evidence for an environmental signaling paradigm of aging in this 2015 paper: “The age-phenotype of a cell or organ depends on its environment and not its history. Organ dysfunction is not the cause of aging, but … Continue reading An environmental signaling paradigm of aging

A rejuvenation therapy and sulforaphane

The founder of the epigenetic clock methodology with the coauthor of Aging as an unintended consequence released a 2020 rodent study “Reversing age: dual species measurement of epigenetic age with a single clock” at https://www.biorxiv.org/content/10.1101/2020.05.07.082917v1.full.pdf: “We employed six clocks to investigate the rejuvenation effects of a plasma fraction treatment in different rat tissues. Two of … Continue reading A rejuvenation therapy and sulforaphane

Work your voluntary muscles today

This 2020 review by the Aging as a disease research group highlighted their specialty: “A theory that fits both the aging and the rejuvenation data suggests that aging is caused primarily by the functional (and notably, experimentally reversible) inactivation of resident stem cells, which precipitates deteriorated tissue maintenance and repair and leads to the loss … Continue reading Work your voluntary muscles today

Aging as an unintended consequence

The coauthors of 2018’s The epigenetic clock theory of aging reviewed progress that’s been made todate in understanding epigenetic clock mechanisms. 1. Proven DNA methylation features of epigenetic clocks: “Methylation of cytosines is undoubtedly a binary event. The increase in epigenetic age is contributed by changes of methylation profiles in a very small percent of … Continue reading Aging as an unintended consequence

Reanalysis of findings from a senolytics clinical trial

To follow up Preliminary findings from a senolytics clinical trial: “The central hypothesis tested in our article is that a brief course of the senolytic drug combination, Dasatinib plus Quercetin (D+Q), can reduce senescent cell abundance in humans, specifically focusing on targeting adipose tissue in subjects with diabetes and kidney dysfunction, a condition in which … Continue reading Reanalysis of findings from a senolytics clinical trial

Aging as a disease

This 2020 interview was with UC Berkeley researchers: “Lack of cure goes hand in hand with inability to accept that this [aging] is disease. For example, there was some resistance to accept tuberculosis as the actual disease. When there was no antibiotics or cure against it, people tended to discard it and said, oh, it’s … Continue reading Aging as a disease