PMID-21978084 – Pinealon Increases Cell Viability via Free Radical Suppression
Khavinson VK, Linkova NS, Tarnovskaia SI, Umnov RS, Elashkina EV, Durnova AO. Pinealon increases cell viability by suppression of free radicals. Adv Gerontol. 2011;24(1):101-105.
Quick Reference
| Property | Value |
|---|---|
| PMID | 21978084 |
| Year | 2011 |
| Journal | Advances in Gerontology |
| Study Type | In vitro |
| Evidence Level | V |
| Sample | Cortical neuron cultures |
| Peptide(s) Studied | Pinealon |
Key Findings
- Pinealon (Glu-Asp-Arg) significantly increased neuron viability under oxidative stress conditions
- The protective effect was mediated by suppression of reactive oxygen species (ROS) production
- Pinealon reduced free radical levels in cortical neuron cultures exposed to oxidative stressors
- Dose-dependent cytoprotective effects were observed
- The tripeptide penetrated cell membranes and exerted intracellular antioxidant effects
- Consistent with the peptide bioregulation theory of short peptides modulating gene expression
Study Design
In vitro study using primary cultures of cortical neurons. Cells were exposed to oxidative stress (hydrogen peroxide or other ROS generators) with or without pre-treatment with pinealon. Cell viability assessed by MTT assay and ROS levels measured by fluorescent probes.
Limitations
- In vitro study; in vivo neuroprotection not demonstrated in this study
- Khavinson group (single research team; limited independent replication)
- Russian-language journal with limited international peer review
- Mechanism of ROS suppression not fully characterized at molecular level
- Doses used in vitro may not reflect achievable CNS concentrations in vivo
Clinical Relevance
Provides the mechanistic basis for pinealon's neuroprotective properties: direct suppression of oxidative stress in neurons. This is relevant for conditions involving neuronal oxidative damage (neurodegenerative diseases, stroke, TBI). However, the in vitro nature and single-group origin require caution in clinical extrapolation. Note: The majority of pinealon research originates from Khavinson's group at the St. Petersburg Institute of Bioregulation and Gerontology.
Related
#research #in-vitro #pinealon #evidence-level-V