PX1 Research is a dedicated USA-based supplier providing laboratory-grade Cortagen for in vitro and preclinical research applications. Every batch undergoes rigorous HPLC and mass spectrometry verification to support precise investigations into peptide-driven gene expression modulation.
PX1 Research is a dedicated USA-based supplier providing laboratory-grade Cortagen for in vitro and preclinical research applications. Every batch undergoes rigorous HPLC and mass spectrometry verification to support precise investigations into peptide-driven gene expression modulation.
When purchasing compounds for epigenetic and transcriptomic investigations, principal investigators require analytical verification, lot traceability, and chemical purity. PX1 Research provides high-purity Cortagen (Ala-Glu-Asp-Pro) specifically synthesized for laboratory research use only. Every batch is manufactured in GMP-compliant, USA-based facilities and validated through an ISO 17025 accredited laboratory to guarantee sequence integrity and high batch-to-batch consistency.
Selecting a reliable research supplier for custom bioregulatory peptides ensures that experimental outcomes are not confounded by peptide synthesis impurities, residual TFA salts, or heavy metal contamination. Researchers looking to buy gene expression modulation Cortagen supplier materials receive full documentation with every order, including lot-specific Certificates of Analysis (COAs) containing high-performance liquid chromatography (HPLC) chromatograms, mass spectrometry (MS) reports, and quantitative bacterial endotoxin assays.
Cortagen is a synthetic bioregulatory tetrapeptide with the primary amino acid sequence L-Alanyl-L-alpha-glutamyl-L-alpha-aspartyl-L-proline (H-Ala-Glu-Asp-Pro-OH). It belongs to a distinct class of short-chain peptide bioregulators developed to study targeted gene expression modulation at the nuclear level. With a molecular formula of C17H26N4O9 and a molecular mass of approximately 430.41 g/mol, its low molecular weight facilitates rapid diffusion and nuclear permeability in cellular assays.
The molecular design of Cortagen centers on its structural side-chain charge distribution. The carboxyl groups provided by the aspartic and glutamic acid residues, combined with the conformational rigidity of proline, allow the peptide to interact selectively with double-stranded DNA grooves and histone complexes. In laboratory settings, this short sequence serves as a model compound for investigating how small regulatory peptides influence structural chromatin dynamics without requiring full-length protein machinery.
Preclinical research indicates that Cortagen regulates gene expression via direct and indirect epigenetic pathways. In vitro assays demonstrate that short peptides penetrate cellular and nuclear membranes to bind non-covalently within the major and minor grooves of genomic DNA. This binding event alters local chromatin conformation, transforming tightly packed heterochromatin into transcriptionally active euchromatin.
By modulating histone acetylation status and DNA methyltransferase activity, Cortagen influences transcript levels of key neurotrophic factors and structural proteins. Preclinical studies suggest that exposure to Cortagen upregulates the transcription of neurotrophic factor genes, such as brain-derived neurotrophic factor (BDNF) and nerve growth factor (NGF), while suppressing pro-inflammatory cytokine transcription cascades. Researchers exploring broader genomic controls can consult our comprehensive research hub for detailed data on transcriptomic profiling techniques.
In vitro and animal models evaluating cortical neuronal cultures have yielded critical insights into Cortagen's cytoprotective mechanisms. In preclinical models of oxidative stress, ischemic injury, and mechanical trauma, Cortagen exposure correlates with marked increases in cell viability and reduced apoptotic markers, such as caspase-3 activation. Researchers frequently utilize Cortagen to examine the signaling cascades involved in neuronal differentiation, axonal outgrowth, and synaptic plasticity under adverse culture conditions.
Furthermore, rodent models of nerve injury demonstrate that administration of research-grade Cortagen aids in evaluating functional nerve regeneration rates and inflammatory regulation. Studies suggest the peptide downregulates hyper-inflammatory gene signatures while stimulating extracellular matrix remodeling genes, making it a valuable target in neurorestorative and degenerative pathology assays.
Cortagen is part of a broader family of short-chain bioregulatory peptides evaluated for cellular signaling and transcriptomic modulation. Comparing Cortagen with structural or functional analogs clarifies its specific utility in controlled experimental models:
While Epitalon focuses primarily on telomerase activation and pineal gene expression, and Pinealon targets short-term cognitive and circadian pathways, Cortagen exhibits pronounced specificity toward cortical neuronal gene expression and neuroprotection. Additionally, researchers comparing systemic inflammatory controls often evaluate Vilon alongside Cortagen to differentiate immune-mediated transcriptomic responses from direct central nervous system gene activation. Understanding these distinctions allows research teams to select the precise sequence needed for their specific transcriptomic assays.
Assaying gene expression requires high chemical purity, as trace contaminants can induce off-target transcriptomic changes or immune responses in cell cultures. PX1 Research enforces strict quality assurance criteria for every lot of Cortagen distributed to academic, clinical, and institutional laboratories.
Chemical verification includes Reverse-Phase High-Performance Liquid Chromatography (RP-HPLC) to confirm sequence purity exceeding 98.0%, alongside Electrospray Ionization Mass Spectrometry (ESI-MS) to verify exact molecular weight. To protect delicate in vitro cultures, every lot undergoes Chromogenic Recombinant Factor C (rFC) or LAL testing to confirm bacterial endotoxin levels remain strictly under 0.01 EU/mg. Review our technical overview on HPLC purity verification to understand our quality control parameters.
Cortagen is supplied as a sterile, lyophilized white powder to maximize stability during transport and storage. Proper reconstitution protocols are critical to maintain structural integrity and avoid enzymatic degradation prior to experimental application.
For reconstituting Cortagen in a laboratory environment, researchers should use sterile Bacteriostatic Water (0.9% benzyl alcohol) or sterile phosphate-buffered saline (PBS, pH 7.4), depending on the requirements of the biological assay. The vial stopper should be sanitized with 70% isopropyl alcohol before solvent addition. Gently direct the diluent down the glass wall of the vial rather than spraying directly onto the cake, then swirl gently until fully dissolved. Avoid vortexing or vigorous shaking, as mechanical shear stress can disrupt peptide structural conformity. For exact dilution mathematics, researchers can utilize our peptide reconstitution calculator guide.
Lyophilized Cortagen remains chemically stable when stored under cold, dark conditions. For long-term preservation prior to reconstitution, store unopened vials at -20°C or -80°C, where the peptide maintains integrity for up to 24 months. Protect product containers from light exposure and humidity fluctuations.
Once reconstituted into aqueous solution, aliquots should be used immediately or stored at -20°C to prevent hydrolysis and micro-precipitation. Avoid repeated freeze-thaw cycles, as phase transitions can cause physical aggregation and concentration drift. Reconstituted solutions intended for short-term use (less than 7 days) can be maintained at 2°C to 8°C in sterile, tightly sealed containers.
Institutional procurement officers and principal investigators must verify chemical provenance before introducing novel research compounds into active study protocols. PX1 Research provides transparent, lot-matched documentation directly downloadable for every shipment. Each COA provides empirical data rather than theoretical specifications.
When auditing supplier credentials, verify that the Certificate of Analysis includes clear, high-resolution HPLC traces showing single-peak resolution, accurate MS mass identification confirming the expected 430.41 g/mol mass, and explicit endotoxin measurement metrics. PX1 Research maintains full batch traceability from initial liquid-phase or solid-phase peptide synthesis through final aseptic vial filling.
PX1 Research streamlines scientific supply chains by offering direct fulfillment for high-purity peptides across North America. Orders placed before 12:00 PM PST (Monday through Friday) ship same-day from our dual distribution centers in California and Arizona, minimizing transit times and ensuring thermal stability upon arrival.
Whether purchasing individual analytical units or bulk quantities for high-throughput screening, laboratories receive consistent quality and complete documentation. Institutional buyers seeking custom quantities, recurring delivery schedules, or formal quote generation can submit requests through our dedicated wholesale procurement portal. Explore our complete catalog of research peptides to support your laboratory's ongoing experimental needs.
What is Cortagen used for in laboratory research?
Cortagen is a synthetic tetrapeptide (Ala-Glu-Asp-Pro) evaluated in preclinical research for its role in gene expression modulation, histone interaction, and cytoprotective mechanisms within cortical neuronal cell models.
What purity level does PX1 Research guarantee for Cortagen?
PX1 Research guarantees a minimum analytical purity of 98.0% for Cortagen, verified by lot-specific Reverse-Phase HPLC and Mass Spectrometry analytical testing.
How is Cortagen verified for low endotoxin levels?
Every lot of Cortagen undergoes quantitative endotoxin testing to ensure levels remain below 0.01 EU/mg, preventing endotoxin-induced background artifact in delicate cellular assays.
What solvent should be used to reconstitute lyophilized Cortagen?
For standard in vitro and analytical assays, Cortagen is typically reconstituted using sterile phosphate-buffered saline (PBS, pH 7.4) or sterile Bacteriostatic Water, depending on protocol parameters.
How should reconstituted Cortagen be stored in the lab?
Reconstituted Cortagen solutions should be stored at 2°C to 8°C for short-term use (up to 7 days) or divided into single-use aliquots and frozen at -20°C to -80°C to prevent freeze-thaw degradation.
Where does PX1 Research ship Cortagen orders from?
All PX1 Research orders are fulfilled directly from our USA facility hubs located in California and Arizona, with same-day shipping available for orders processed before 12:00 PM PST Monday through Friday.
Is Cortagen approved for human administration or clinical use?
No. Cortagen is strictly a research chemical supplied exclusively for in vitro and laboratory research applications. It is not intended for medical, therapeutic, diagnostic, or human consumption.
How does Cortagen differ structurally from Pinealon?
Cortagen is a tetrapeptide with the sequence Ala-Glu-Asp-Pro, whereas Pinealon is a tripeptide with the sequence Glu-Asp-Arg. While both target neurological pathways, their specific binding affinities and gene expression targets differ.
All products are sold strictly for laboratory and research use only. Not for human or veterinary use, diagnosis, treatment or consumption. Statements have not been evaluated by the FDA.