This 2023 human study investigated associations among sex hormones and epigenetic clocks: “We studied associations between sex steroid hormones and DNA methylation-based (DNAm) biomarkers of age and mortality risk including Pheno Age Acceleration (AA), Grim AA, and DNAm-based estimators of Plasminogen Activator Inhibitor 1 (PAI1), and leptin concentrations. Leptin is a peptide hormone and is … Continue reading Sex hormones and epigenetic clocks
A 2023 human study investigated exercise, klotho gene, and epigenetic clock relationships: “Named after the spinner of the thread of life, klotho (KL) is involved in the aging process and may act as an anti-aging hormone in mammals. We hypothesize that circulating KL is correlated with age-associated methylation of the KL gene promoter region, and … Continue reading The goddess of destiny
“We use data from a safety study (n = 18, mean age 74) to investigate whether human umbilical cord plasma concentrate (hereinafter Plasma Concentrate) injected weekly (1 ml intramuscular) into elderly human subjects over a 10-week period affects different biomarkers, including epigenetic age measures, standard clinical biomarkers of organ dysfunction, mitochondrial DNA copy number (mtDNA-CN), and … Continue reading Epigenetic effects of plasma concentrate
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
Two 2022 papers, starting with a review of irisin: “This article is an overview of irisin generation, secretion, and tissue distribution. Its targeting of tissues or organs for prevention and treatment of chronic diseases is systematically summarized, with discussion of underlying molecular mechanisms. Irisin is an exercise-induced myokine expressed as a bioactive peptide in multiple … Continue reading The goddess of rainbows
This 2022 human study investigated epigenetic clock associations: “We assessed the potential relationship of Vitamin D’s effects on pain intensity and disability through associations in epigenetic aging in individuals with and without knee osteoarthritis (KOA). We hypothesized that associations between Vitamin D levels with pain intensity and interference in persons with KOA would be significantly … Continue reading Vitamin D and pain
This 2022 human study incorporated DNA methylation measures of four physical fitness parameters into a new epigenetic clock: “Our work introduces new DNAm biomarkers for fitness parameters of gait speed (walking speed), hand grip strength, forced expiratory volume in one second (FEV1), and maximal oxygen uptake (VO2max). These DNAm biomarkers represent new tools for researchers … Continue reading Epigenetic components for evaluating a person’s physical fitness
Starting this blog’s eighth year with a 2022 epigenetic clock study that assessed young people’s common blood tests fifteen and twenty years later: “GrimAge acceleration (GAA), an epigenetic marker that represents physiologic aging, is associated with atherosclerotic cardiovascular disease. We used multivariable regression models to examine associations of Y15 and Y20 GAA estimates with plasma … Continue reading Predicting atherosclerosis
This 2021 human study evaluated associations among epigenetic clocks and socioeconomic status: “We conducted a comprehensive, comparative analysis of associations between various dimensions of socioeconomic status (SES) (education, income, wealth, occupation, neighbourhood environment, and childhood SES) and eight epigenetic clocks in two well-powered US ageing studies: The Multi-Ethnic Study of Atherosclerosis (MESA); and The Health … Continue reading If you aren’t where you want to be, change yourself
A 2021 human twin study investigated epigenetic clocks: “This study showed that accelerated epigenetic aging is associated with increased mortality, and smoking plays a role in explaining this association. Present findings suggest that DNAm GrimAge is a strong predictor of mortality independent of genetic influences among female twin pairs. An invitation to participate in the … Continue reading Smoke and die early, while your twin lives on
I’ve partially read these 39 studies and reviews, but haven’t taken time to curate them. Early Life Intergenerational Transmission of Cortical Sulcal Patterns from Mothers to their Children (not freely available) Differences in DNA Methylation Reprogramming Underlie the Sexual Dimorphism of Behavioral Disorder Caused by Prenatal Stress in Rats Maternal Diabetes Induces Immune Dysfunction in … Continue reading Clearing out the 2020 queue of interesting papers
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
Will you excuse a poorly-evidenced observation that’s a positive development I left out of Week 8 of Changing to a youthful phenotype with broccoli sprouts? I got a haircut last weekend after waiting for Governor Klan Robes Blackface to not arrest barbershop and hair salon owners for the crime of earning a living. A thirty-something … Continue reading A hair color anecdote
Starting the sixth year of this blog with a 2020 article authored by the founder of the PhenoAge epigenetic clock methodology: “The Ge[r]oscience paradigm suggests that targeting the aging process could delay or prevent the risk of multiple major age-related diseases. We need clinically valid measures of the underlying biological process and/or classification criteria for … Continue reading Do epigenetic clocks measure causes or effects?
This 2019 worldwide review of epigenetic clocks was a semi-anonymous mishmash of opinions, facts, hypotheses, unwarranted extrapolations, and beliefs. Diversity of viewpoints among the 21 coauthors wasn’t evident. 1. Citations of coauthors’ works seemed excessive, and they apologized for omissions. However: Challenge 5 was titled “Single-cell analysis of aging changes and disease” and Table 1 … Continue reading An epigenetic clock review by committee
Surface Your Real Self 