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Effect of Proline-Containing Oligopeptides PGP and RGP on Proliferative and Protein-Synthesizing Activity of Cultured
I V Tolstenok1, M Yu Fleishman2, E N Sazonova1
1Central Research Laboratory, Far-Eastern State Medical University, Khabarovsk, Russia.
Insights
Gly-Pro peptides Pro-Gly-Pro (PGP) and Arg-Gly-Pro (RGP) did not affect normal pulmonary fibroblast cell division. However, these peptides protected cells against hydrogen peroxide-induced oxidative stress, improving DNA synthesis and reducing oxidative markers.
Area of Science:
- Cell Biology
- Biochemistry
- Toxicology
Background:
- Pulmonary fibroblasts are crucial for lung tissue maintenance.
- Oxidative stress can impair fibroblast function and contribute to lung disease.
- Gly-proline peptides are known for their potential biological activities.
Purpose of the Study:
- To investigate the effects of Pro-Gly-Pro (PGP) and Arg-Gly-Pro (RGP) on rat pulmonary fibroblasts.
- To determine the protective potential of PGP and RGP against oxidative stress induced by hydrogen peroxide.
- To assess the impact of these peptides on cell division, protein synthesis, and oxidative status.
Main Methods:
- Primary culture of pulmonary fibroblasts from newborn albino rats.
- Treatment with Pro-Gly-Pro (PGP) and Arg-Gly-Pro (RGP) under normal and oxidative stress conditions.
- Assessment of cell division parameters, protein-synthesizing function, and lucigenin-dependent chemiluminescence.
Main Results:
- PGP and RGP showed no effect on cell division under physiological conditions.
- Hydrogen peroxide induced significant oxidative stress, suppressing protein synthesis.
- Co-administration of PGP and RGP with hydrogen peroxide corrected oxidative status, activated DNA synthesis, and inhibited chemiluminescence.
Conclusions:
- Pro-Gly-Pro (PGP) and Arg-Gly-Pro (RGP) do not influence normal pulmonary fibroblast proliferation.
- These gly-proline peptides exhibit protective effects against hydrogen peroxide-induced oxidative stress in pulmonary fibroblasts.
- PGP and RGP demonstrate potential as therapeutic agents for mitigating oxidative damage in lung tissue.
Abstract:
We studied the effect of glyprolines Pro-Gly-Pro (PGP) and Arg-Gly-Pro (RGP) on the primary culture of pulmonary fibroblasts from newborn albino rats under normal conditions and during oxidative stress. Under physiological conditions, the peptides had no effect on parameters of cell division. Hydrogen peroxide induced intensive oxidative stress accompanied by suppression of protein-synthesizing function. When hydrogen peroxide was added to the culture containing the test peptides, correction of the oxidative status was observed accompanied by activation of DNA-synthesizing activity and inhibition of lucigenin-dependent chemiluminescence.
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