Digital PNG artwork · delivered by email | Secure checkout · no physical shipping
Hedi Raizer

Journal 4 min read

What markers track telomere length?

Telomere length is a recognized biomarker of cellular aging. This page outlines the markers and pathways studied in research models, including telomerase activity, hTERT expression, and alternative lengthening of telomer

peptides-pro Editorial

What markers track telomere length?

Telomere length (TL) is a recognized biomarker of aging, reflecting the replicative history of a cell. In research settings, TL is often assessed alongside other markers such as telomerase enzyme activity, human telomerase reverse transcriptase (hTERT) mRNA expression, and indicators of the alternative lengthening of telomeres (ALT) pathway [4][5]. These markers are used to evaluate interventions that may influence cellular aging in model systems.

The work centres on telomerase, a ribonucleoprotein enzyme that adds repetitive sequences to chromosome ends, and on ALT, a recombination-based mechanism for telomere maintenance [4][5].

Research Studies

Epitalon and telomere elongation in human cell lines

Epitalon, a naturally occurring tetrapeptide, has been studied for its effects on telomere length in human cell lines. Research indicates that Epitalon increases telomere length through telomerase upregulation or ALT activity [4][5]. Quantitative data on the biomolecular pathway leading to telomere length increase, hTERT mRNA expression, telomerase enzyme activity, and ALT activation have been reported [4][5]. A correction to one of these studies has been published [3].

Collagen peptides and telomere length in adults aged 50-70

A clinical trial is investigating whether daily collagen peptide supplementation can stabilize or lengthen telomeres and improve related markers of cellular aging in adults aged 50-70 years with overweight and low-to-moderate physical activity [2]. The study aims to determine if six months of collagen peptides stabilize or extend telomere length and increase telomerase activity compared with placebo, and whether any telomere-related changes are associated with lower inflammation, healthier body composition, and better functional health [2].

Nicotinamide mononucleotide (NMN) and immunosenescence in middle-aged and elderly individuals

A placebo-controlled clinical trial is investigating the effect of nicotinamide mononucleotide (NMN) supplementation on immunosenescence in middle-aged and elderly people with metabolic disorders [6]. The study aims to provide a new method to improve immunosenescence and examines effects on glucose and lipid metabolism [6]. Telomere length is not specified as an outcome in the available description.

Metformin and molecular aging in prediabetes

Metformin has been shown to improve lifespan in animal models through an anti-ageing pathway driven by mTOR and to protect endothelial cells [7]. A clinical trial is investigating metformin's effects on molecular aging in individuals with prediabetes, a population with high incidence rates of prediabetes and type 2 diabetes mellitus [7]. Telomere length is not explicitly mentioned as a marker in the available summary.

Transient reprogramming and endothelial cell aging

Non-genetic overexpression of Yamanaka factors has been reported to induce partial functional rejuvenation and attenuation of senescence-associated features in endothelial cells [1]. Methods included quantification of gene expression and measurements of cellular functions in vitro, with in vivo experiments in a hind-limb model [1]. Telomere length was not a specified marker in the available abstract.

Telomere length and mitochondrial DNA copy number in porcine embryos

In parthenogenetically activated porcine embryos, mitochondrial DNA copy number (mt-cn) and telomere length (TL) are considered secondary markers of embryonic quality [8]. The study investigated the relationship between mt-cn and TL in this model [8].

Telomere length in patients with non-functional adrenal incidentalomas

Telomere length is affected by environmental factors such as oxidative stress and inflammation, which also contribute to metabolic syndrome components linked to cellular aging [9]. A study examined telomere length in patients with non-functional adrenal incidentalomas [9].

Breast DNA methylation-based measures of biological ageing and obesity-related breast cancer risk markers

Epigenetic ageing, a measure of biological ageing, has been linked to breast cancer risk, with prior studies mainly focusing on blood-based measures [10]. A study aimed to examine well-established epigenetic age estimates in normal breast tissue in relation to obesity-related breast cancer risk markers [10]. Telomere length was not a specified marker in the available summary.

Kisspeptin-54 and chondrocyte senescence in osteoarthritis

Kisspeptin-54, a neuropeptide with pleiotropic protective effects, was investigated for its role in chondrocyte senescence in osteoarthritis [11]. The study explored mechanisms involving SIRT3-mediated telomere protection and p53 acetylation inhibition [11].

Markers and Models

Marker Description Example Model/Study
Telomere length (TL) Repetitive DNA sequences at chromosome ends; shortens with cell division Human cell lines [4][5]; porcine embryos [8]; clinical trials [2][9]
Telomerase activity Enzyme activity that elongates telomeres Epitalon studies [4][5]; collagen peptide trial [2]
hTERT mRNA expression Expression of the catalytic subunit of telomerase Epitalon studies [4][5]
ALT activity Alternative lengthening of telomeres, a recombination-based mechanism Epitalon studies [4][5]
Mitochondrial DNA copy number (mt-cn) Marker of mitochondrial content, sometimes assessed with TL Porcine embryos [8]

If you are reading this for personal health reasons

The compounds and materials discussed here are sold for laboratory research use only. We do not provide dosing, medical guidance, or health advice. Anyone considering a compound for themselves should speak to a licensed clinician.

Sources

WhatsApp