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Updated: May 13, 2026
09:18
Identification of Intracellular Signaling Events Induced in Viable Cells by Interaction with Neighboring Cells Undergoing Apoptotic Cell Death
Published on: December 27, 2016
The Glycine-Proline-Hydroxyproline Tripeptide Reduces Cell Death Caused by Glycative Stress
Shoko Yamamoto1, Yo Matsumoto1, Fumihiro Yanbe1
1Technical Center, Jellice Co., Ltd., 4-4-1 Sakae, Tagajo, Miyagi 985-0833, Japan.
Protein and Peptide Letters
|May 12, 2026
Summary
Collagen Tripeptide (CTP) component Gly-Pro-Hyp (GPHyp) effectively scavenges glyceraldehyde (GA) and inhibits toxic Advanced Glycation End-Products (TAGE). This anti-glycation action may improve blood vessel elasticity and support a healthy lifestyle.
Area of Science:
- Biochemistry
- Nutritional Science
- Vascular Biology
Background:
- Collagen Tripeptide (CTP) intake improves vascular elasticity and reduces Advanced Glycation End-Products (AGEs).
- The anti-glycation effect of CTP is hypothesized to contribute to its vascular benefits.
- Glycine-proline-hydroxyproline (GPHyp), a primary CTP component, is investigated for its anti-glycation properties.
Purpose of the Study:
- To investigate the in vitro anti-glycation effects of Gly-Pro-Hyp (GPHyp).
- To compare the anti-glycation efficacy of GPHyp against its metabolite sequences.
- To assess GPHyp's impact on cell viability and inflammatory markers in a glyceraldehyde (GA) glycation model.
Main Methods:
- Evaluated cell viability and IL-8 mRNA expression in GA-treated HepG2 cells with GPHyp.
- Determined the half-maximal inhibitory concentration (IC50) for TAGE formation and lysozyme glycation crosslinking.
- Measured GA consumption and concentration changes during the reaction with GPHyp.
Main Results:
- GPHyp significantly suppressed cell death and IL-8 mRNA expression in GA-treated cells.
- GPHyp demonstrated superior anti-glycation effects compared to its metabolites, with lower IC50 values for TAGE production and lysozyme crosslinking.
- GPHyp significantly increased GA consumption and reduced GA levels within the first hour of incubation.
Conclusions:
- GPHyp exhibits potent GA-scavenging activity and inhibits TAGE production.
- These findings support GPHyp's role in CTP-mediated reduction of serum TAGE levels and improved vascular elasticity.
- The anti-glycation effects of GPHyp suggest potential benefits for supporting a healthy lifestyle.
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