Ingredient or product comparison
Primary Mechanisms: Telomere vs Matrix Biology
Epitalon’s core dermal anti-ageing mechanism is telomerase (hTERT) activation: TRAP assay (telomere repeat amplification protocol) — a PCR-based measurement of telomerase activity in cell extracts — shows dose-dependent telomerase activation in human dermal fi
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- Epitalon’s core dermal anti-ageing mechanism is telomerase (hTERT) activation: TRAP assay (telomere repeat amplification protocol) — a PCR-based measurement of telomerase activity in cell extracts — shows dose-dependent telomerase activation in human dermal fibroblasts (HDFs) after Epitalon treatment (0.1–10 nM, 24h). Downstream TERT activation elongates critically short telomeres (measured by Southern blot TRF analysis, or by qPCR telomere length ratio T/S), delays the p16-p21-Rb senescence programme (SA-β-gal pH 6.0 reduction, p16 Ink4a western blot decrease), and reduces the senescence-associated secretory phenotype (SASP: IL-6, IL-8, MMP-1, MMP-3, GDF15 multiplex Luminex panel in conditioned media from late-passage HDFs). The biological logic is that telomere shortening in dermal fibroblasts — occurring over decades of UV exposure, oxidative stress, and replication — is a primary driver of fibroblast functional decline and senescence-driven dermal thinning. Epitalon targets the ups
- GHK-Cu’s dermal anti-ageing mechanism operates entirely at the matrix and oxidative stress level — downstream of telomere biology. TGF-β1 signalling augmentation (GHK-Cu increases TGF-β1 secretion and enhances Smad2/3 pS465/467 → COL1A1 mRNA and Sircol collagen output in HDFs); MMP-1/AP-1 suppression (AP-1-luciferase reporter assay, MMP-1 ELISA in UVB-stimulated HDFs showing NF-κB p65 and JNK-AP-1 pathway inhibition); NRF2-HO-1-NQO1 antioxidant upregulation (nuclear western, mRNA qPCR); and PDGFR-β transactivation (Ras-ERK1/2 fibroblast proliferation). GHK-Cu targets the consequence of telomere shortening — the dysfunctional matrix secretory profile of senescent fibroblasts — rather than the telomere length underlying it.