Epitalon · research summary

The Antioxidant Tetrapeptide Epitalon Enhances Delayed Wound Healing in an in Vitro Model of Diabetic Retinopathy.

Stem cell reviews and reports · 2025. Summary drawn from the study's full text. Each statement is followed by the exact sentence it comes from. This is a research summary, not medical advice.

Study type

In vitro study using a human retinal pigment epithelial cell line
“This study aims to test the hypothesis that the antioxidant effect of the synthetic tetrapeptide AEDG (Ala-Glu-Asp-Gly, Epitalon) improves the delayed healing process associated with hyperglycemia in DR, using a high glucose (HG)-injured human retinal pigment epithelial cell line (ARPE-19).”

Subjects

Human retinal pigment epithelial cell line (ARPE-19)
“The human retinal pigment epithelium cell line, ARPE-19 (ATCC, Manassas, USA), was cultured in Dulbecco’s modified Eagle’s medium Nutrient Mixture F-12 (1:1 mixture of Dulbecco’s modified Eagle’s medium and Ham’s F12; (DMEM/F12, Gibco, Gaithersburg, USA) supplemented with 10% heat-inactivated fetal bovine serum (FBS, Gibco, Gaithersburg, USA) and 1% penicillin/streptomycin (Invitrogen, Life Technologies, USA) in a humidified incubator with 5% CO2 at 37 °C.”

Sample size

At least three independent experiments
“Data are reported as means ± the standard error of the mean (SEM), representing at least three independent experiments.”

Duration

Expositions ranging from 24 to 72 hours
“After cell adhesion, the medium was replaced, and cells were incubated with SG (CTR) or HG 35 mM for 24, 48, and 72 h.”

Reported findings

High glucose exposure delayed wound healing and increased reactive oxygen species levels in ARPE-19 cells.
“We found that HG exposure delayed wound healing in ARPE-19 cells and increased intracellular levels of reactive oxygen species (ROS), while decreasing antioxidant gene expression.”
Epitalon treatment restored impaired wound healing by inhibiting hyperglycemia-induced epithelial-mesenchymal transition and fibrosis.
“The antioxidant Epitalon restored impaired wound healing in HG-injured ARPE-19 cells by inhibiting hyperglycemia-induced EMT and fibrosis.”

Source: PubMed 40493162 · DOI 10.1007/s12015-025-10911-x · all study summaries

Study type

In vitro study using a human retinal pigment epithelial cell line

“This study aims to test the hypothesis that the antioxidant effect of the synthetic tetrapeptide AEDG (Ala-Glu-Asp-Gly, Epitalon) improves the delayed healing process associated with hyperglycemia in DR, using a high glucose (HG)-injured human retinal pigment epithelial cell line (ARPE-19).”

Subjects

Human retinal pigment epithelial cell line (ARPE-19)

“The human retinal pigment epithelium cell line, ARPE-19 (ATCC, Manassas, USA), was cultured in Dulbecco’s modified Eagle’s medium Nutrient Mixture F-12 (1:1 mixture of Dulbecco’s modified Eagle’s medium and Ham’s F12; (DMEM/F12, Gibco, Gaithersburg, USA) supplemented with 10% heat-inactivated fetal bovine serum (FBS, Gibco, Gaithersburg, USA) and 1% penicillin/streptomycin (Invitrogen, Life Technologies, USA) in a humidified incubator with 5% CO2 at 37 °C.”

Reported findings

High glucose exposure delayed wound healing and increased reactive oxygen species levels in ARPE-19 cells.

“We found that HG exposure delayed wound healing in ARPE-19 cells and increased intracellular levels of reactive oxygen species (ROS), while decreasing antioxidant gene expression.”

Epitalon treatment restored impaired wound healing by inhibiting hyperglycemia-induced epithelial-mesenchymal transition and fibrosis.

“The antioxidant Epitalon restored impaired wound healing in HG-injured ARPE-19 cells by inhibiting hyperglycemia-induced EMT and fibrosis.”