Overview
Pinealon is a short synthetic tripeptide composed of three amino acids — glutamic acid, aspartic acid, and arginine — giving it the sequence Glu-Asp-Arg (also written as EDR). It belongs to a class of small regulatory peptides and is closely related to a family of short-chain peptides that have been investigated for their potential roles in cellular signaling and gene expression. Pinealon has drawn particular interest in neuroscience research, where laboratory studies have explored its possible influence on neuronal activity and protein synthesis at the cellular level. Like other peptides in this category, it is thought to interact with gene regulatory mechanisms, though the precise pathways involved are still an active area of scientific investigation. Pinealon is intended strictly for laboratory and research purposes and is not approved for human use or consumption.
Research & Bioactivity
Pinealon (Glu-Asp-Arg, or EDR) is a short tripeptide that researchers have studied primarily in the context of neuroprotection and neuronal function. Studies have examined its ability to interact directly with DNA, with spectral and molecular dynamics analyses suggesting the peptide can partially penetrate the major groove of the DNA double helix and influence key base atoms, a property thought to be relevant to its potential role in gene expression regulation. In vitro and in vivo research has investigated Pinealon's effects on neuronal cultures, including its observed influence on protein synthesis associated with neuronal activity and its apparent reduction of apoptotic processes in cell models. Researchers have also explored the peptide in relation to the pathogenesis of neurodegenerative conditions, with studies noting its interaction with mechanisms relevant to dendritic spine integrity in mouse-derived neuronal cultures. Additionally, comparative monitoring studies have examined Pinealon alongside other compounds in age-related research contexts, assessing various biomarkers across different age groups. Broader peptide research has also situated EDR-related compounds within signaling pathways such as PI3K/Akt and MAPK, which are of interest to investigators studying tissue and cellular regulation.
Published Research
Therapeutic Peptides in Orthopaedics: Applications, Challenges, and Future Directions.
Rahman OF, Lee SJ, Seeds WA — 2026
Therapeutic peptides are emerging as promising adjuncts in the management of orthopaedic injuries, grounded in their ability to modulate molecular signaling networks central to cellular medicine. By acting on key pathways such as PI3K/Akt, mTOR, MAPK, TGF-β, and AMPK, peptides exert influence over tissue regeneration, inflammation resolution, and neuromuscular recovery. Wound-healing peptides such as BPC-157, TB-500, and GHK-Cu promote angiogenesis, integrin-mediated extracellular matrix remodeling, and fibroblast activation, whereas growth hormone secretagogues like ipamorelin, CJC-1295, tesamorelin, sermorelin, and AOD-9604 activate IGF-1 signaling and satellite cell repair. Recovery-enhancing agents such as epithalon, delta sleep-inducing peptide, and pinealon target circadian and mitochondrial regulators, and neuroactive peptides like selank, semax, and dihexa enhance brain-derived neurotrophic factor and HGF/c-Met pathways critical to neuroplasticity. Although preclinical studies are promising, there is a current lack of clinical trials. This review integrates current mechanistic insights with orthopaedic relevance, emphasizing safety, efficacy, and future directions for responsible integration into musculoskeletal care.
Optimization of protein hydrolysis conditions and antioxidant activity of tetrapeptide Asp-Arg-Glu-Leu by elevating the Nrf2/Keap1-p38/PI3K-MafK signaling pathway.
Jiang Y, Wang R, Yin Z, Sun J, Wang B, et al. — 2021
Tetrapeptide Asp-Arg-Glu-Leu (DREL) was isolated from Jiuzao protein hydrolysates (JPHs) by alkaline proteinase (AP) and exhibited antioxidant activity in the HepG2 cell model in the previous study. In this study, the hydrolysis method of Jiuzao protein (JP) was further optimized by using different proteinases under different conditions (i.e., temperature, time, ratio between proteinase and substrate, and pH). Considering the limitation of in vitro assays, the AAPH-induced oxidative stress Sprague-Dawley (SD) rat model was selected to measure the antioxidant capacity of DREL in vivo. Pepsin exhibited the highest hydrolysis degree under the optimum conditions after single factor analysis (SFA) among seven proteinases. The total yield of DREL in Jiuzao was 158.24 mg kg-1Jiuzao under the pepsin's optimum hydrolysis conditions determined by response surface methodology analysis (RSMA). In addition, DREL could activate the Nrf2/Keap1-p38/PI3K-MafK signaling pathway and downstream antioxidant enzymes to improve the antioxidant ability in vivo. DREL also preliminarily exhibited anti-inflammatory activity by inhibiting the secretion of inflammatory cytokines and the mediator through the activation of Nrf2. Of note, the addition of DREL in baijiu brought an inconspicuous change in the taste after sensory evaluation. This study finds out the better proteinase used for JP hydrolysis and verifies the antioxidant capacity of DREL in vivo, which provides a potential approach to apply functional components from Jiuzao for by-product utilization. Meanwhile the antioxidant function of baijiu or other foods can be increased through adding these functional peptides without affecting the original flavor and taste in the future.
EDR Peptide: Possible Mechanism of Gene Expression and Protein Synthesis Regulation Involved in the Pathogenesis of Alzheimer's Disease.
Khavinson V, Linkova N, Kozhevnikova E, Trofimova S — 2020
The EDR peptide (Glu-Asp-Arg) has been previously established to possess neuroprotective properties. It activates gene expression and synthesis of proteins, involved in maintaining the neuronal functional activity, and reduces the intensity of their apoptosis in in vitro and in vivo studies. The EDR peptide interferes with the elimination of dendritic spines in neuronal cultures obtained from mice with Alzheimer's (AD) and Huntington's diseases. The tripeptide promotes the activation of the antioxidant enzyme synthesis in the culture of cerebellum neurons in rats. The EDR peptide normalizes behavioral responses in animal studies and improves memory issues in elderly patients. The purpose of this review is to analyze the molecular and genetics aspects of the EDR peptide effect on gene expression and synthesis of proteins involved in the pathogenesis of AD. The EDR peptide is assumed to enter cells and bind to histone proteins and/or ribonucleic acids. Thus, the EDR peptide can change the activity of the MAPK/ERK signaling pathway, the synthesis of proapoptotic proteins (caspase-3, p53), proteins of the antioxidant system (SOD2, GPX1), transcription factors PPARA, PPARG, serotonin, calmodulin. The abovementioned signaling pathway and proteins are the components of pathogenesis in AD. The EDR peptide can be AD.
Role of Mono- and Divalent Ions in Peptide Glu-Asp-Arg-DNA Interaction.
Silanteva IA, Komolkin AV, Morozova EA, Vorontsov-Velyaminov PN, Kasyanenko NA — 2019
The interaction of the regulatory biologically active peptide Glu-Asp-Arg (EDR) with DNA is considered by spectral, NMR, viscosimetry, and molecular dynamics methods. It was shown that EDR can partly penetrate into the major groove of DNA and affect the base atoms, mainly the N7 and O6 of guanine. It was observed that Mg ions can promote DNA-EDR interaction due to their effective screening of the negatively charged phosphate groups of DNA. This action of Mg remains in salted solution as well.
[Comparative analysis of different methods of geroprotective].
Myakotnykh VS, Torgashov MN, Egorin KV, Meshchaninov VN, Gavrilov VI, et al. — 2016
In the monitoring process 110 representatives of different age groups held a comparative analysis of the efficacy and safety of several geroprotective techniques, including the use of dry carbon dioxide baths, hyperbaric oxygen therapy, therapeutic massage and receiving Oligopeptide preparations containing complexes lysyl-glutamyl-asparagin and glutamyl-asparagin-arginine (Vezugen and Pinealon). The most pronounced positive impact on indicators of biological age were detected during the combined use of these two Oligopeptide complexes. The most safe from the point of view of influence on a number of biochemical, immunological parameters, clinical condition of the patients were therapeutic massage and Oligopeptide drugs. The use of dry carbon dioxide baths and hyperbaric oxygenation with an undoubtedly positive influence on the indices of biological age has a number of limitations and contraindications regarding its security.