When procuring specialized bioregulatory peptides for central nervous system investigation, selecting an accredited laboratory supplier is critical. Cortagen (Ala-Glu-Asp-Pro) is a synthetic tetrapeptide evaluated in preclinical models for its role in neuronal gene expression and neuroprotective signaling. PX1 Research provides analytical-grade Cortagen manufactured in the USA, backed by lot-specific third-party HPLC and mass spectrometry verification.
When procuring specialized bioregulatory peptides for central nervous system investigation, selecting an accredited laboratory supplier is critical. Cortagen (Ala-Glu-Asp-Pro) is a synthetic tetrapeptide evaluated in preclinical models for its role in neuronal gene expression and neuroprotective signaling. PX1 Research provides analytical-grade Cortagen manufactured in the USA, backed by lot-specific third-party HPLC and mass spectrometry verification.
To buy Cortagen for neuroscience research, qualified investigators should source directly from ISO 17025-accredited laboratory suppliers that provide lot-specific third-party Certificate of Analysis (COA) documents detailing liquid chromatography-mass spectrometry (LC-MS) and high-performance liquid chromatography (HPLC) purity verification. PX1 Research supplies high-purity Cortagen manufactured in cGMP-compliant US facilities, featuring documented endotoxin limits under 0.01 EU/μg and same-day dispatch from California and Arizona facilities for strict cold-chain integrity.
Neuroscience protocols demand high chemical reproducibility. Substandard peptide preparations containing sequence errors, residual trifluoroacetic acid (TFA), or bacterial endotoxins risk confounding gene expression assays and primary cell cultures. Sourcing analytical-grade peptides ensures experimental data reflect true biological interactions rather than artifactual cellular responses.
Cortagen is a short-chain bioregulatory tetrapeptide composed of four amino acid residues: L-alanyl-L-glutamyl-L-aspartyl-L-proline (sequence: H-Ala-Glu-Asp-Pro-OH). It was originally developed through structural optimization of cerebral cortex tissue hydrolysates, isolating the active sequence responsible for cellular signaling in central nervous tissue.
With a precise molecular weight of 444.44 g/mol, the small hydrodynamic radius of Cortagen allows it to cross cell membranes efficiently in in vitro assays. Unlike larger protein structures, short bioregulatory peptides like Cortagen interact directly with nuclear histone structures and chromatin strands in cell culture models, making them an active subject of investigation within epigenetic and genomic regulation research. You can explore broader biochemical literature in our neuroscience research library.
In vitro and animal model studies indicate that Cortagen exhibits selective activity within cortical neuronal networks. Preclinical research suggests that the tetrapeptide interacts with DNA promoter regions, modulating transcription factor binding and upregulating specific neurotrophic factors.
Primary neuronal culture assays demonstrate that Cortagen exposure influences expression markers associated with structural plasticity, anti-apoptotic signaling pathways, and inflammatory cytokine suppression. Rodent models of ischemic injury and mechanical nerve trauma suggest that pre- or post-treatment with Cortagen attenuates oxidative stress markers and accelerates functional electrophysiological recovery. Researchers studying brain tissue homeostasis often cross-reference these findings with broader datasets available in our neuroscience peptide research hub.
Within preclinical neurobiology, Cortagen is frequently evaluated alongside other synthetic short-chain peptides that target central tissue homeostasis. Understanding how Cortagen differs structurally and functionally from related research compounds assists investigators in selecting appropriate candidates for specific assays.
While Cortagen (Ala-Glu-Asp-Pro) targets cortical gene expression and neuroprotection, Epitalon (Ala-Glu-Asp-Gly) is a structurally similar bioregulatory tetrapeptide primarily evaluated for pineal gland interaction, telomerase expression, and cellular aging assays as detailed in our analysis of Epitalon research mechanisms. Similarly, Semax—a heptapeptide derived from ACTH(4-10)—operates through BDNF/TrkB signaling cascades and monoaminergic modulation rather than direct chromatin interaction, while Pinealon (Glu-Asp-Arg) targets selective cerebellar and hippocampal pathways. For broader central nervous system screening, researchers frequently analyze these distinct short-chain sequences in parallel to map tissue-specific regulatory responses.
Selecting a supplier when preparing to buy Cortagen for neuroscience studies requires rigorous verification of quality assurance protocols. Neuroscience assays, particularly primary neuronal cell cultures and microelectrode array (MEA) recordings, are sensitive to trace contaminants that disrupt baseline cellular resting potentials.
A qualified vendor must perform comprehensive analytical testing on every synthesis batch. Important quality benchmarks include verified purity exceeding 98.0% by RP-HPLC, exact molecular mass confirmation via ESI-MS or MALDI-TOF mass spectrometry, and strict verification of net peptide content via nitrogen analysis. For large-scale studies, investigators should establish a wholesale research account to ensure single-lot consistency across extended multi-phase trial blocks.
A reliable Certificate of Analysis must provide raw analytical data rather than summary statements. When reviewing COAs for Cortagen or related compounds, researchers should inspect the high-performance liquid chromatography chromatogram for symmetrical peak resolution without shoulder peaks that signal sequence truncated side-products.
Furthermore, mass spectrometry spectra must exhibit the dominant single-protonated species [M+H]+ at the expected mass-to-charge ratio (m/z 445.44), with zero unidentified high-mass adducts. PX1 Research publishes verifiable, independent third-party laboratory reports for every lot, adhering to our stringent protocol for HPLC and mass spectrometry verification.
Bacterial endotoxins (lipopolysaccharides or LPS) represent a significant threat to experimental validity in neurobiological research. Microglial cells express Toll-like receptor 4 (TLR4), which triggers robust pro-inflammatory cytokine cascades upon exposure to picogram quantities of endotoxin, obscuring the authentic neuroprotective or gene-regulatory effects of Cortagen.
PX1 Research enforces strict chromogenic LAL (Limulus Amebocyte Lysate) testing for all custom synthesis batches. Our neuroscience-grade peptides maintain documented endotoxin levels strictly below 0.01 EU/μg. To understand how controlled endotoxin limits prevent cell culture toxicity and false-positive immune activation, review our guide to endotoxin testing standards.
Cortagen is supplied as a lyophilized (freeze-dried) sterile powder to ensure maximum chemical stability during transport and storage. Upon receipt, unopened vials should be stored at -20°C or -80°C in a dry environment protected from light to prevent hygroscopic degradation.
For laboratory reconstitution, researchers should allow the vial to equilibrate to room temperature before adding solvent to prevent condensation inside the container. Cortagen is highly soluble in sterile phosphate-buffered saline (PBS, pH 7.4) or sterile water for injection. Reconstituted stock solutions should be divided into single-use aliquots and maintained at -80°C to minimize freeze-thaw degradation cycles.
PX1 Research supports university departments, pharmaceutical laboratories, and contract research organizations (CROs) with dependable delivery and continuous batch availability. All products are synthesized within state-of-the-art USA facilities operating under ISO 9001 and cGMP alignment.
Orders are dispatched same-day Monday through Friday from our centralized logistics facilities in California and Arizona. This dual-hub distribution network minimizes transit times and thermal exposure during transport, safeguarding peptide structural integrity from synthesis to your laboratory bench.
What is Cortagen used for in preclinical research?
Cortagen (Ala-Glu-Asp-Pro) is utilized in laboratory research to study gene expression modulation, neuroprotection, and cellular regeneration mechanisms in primary neuronal cultures and animal models.
How does PX1 Research verify the purity of Cortagen?
Every lot of Cortagen undergoes third-party verification using Reverse-Phase HPLC to establish chemical purity (>98%) and Mass Spectrometry (ESI-MS) to confirm sequence molecular weight.
What endotoxin controls are applied to PX1 Cortagen?
PX1 Research conducts chromogenic LAL testing on each lot, ensuring endotoxin levels remain below 0.01 EU/μg to prevent microglial activation in cell culture models.
Where is PX1 Research Cortagen manufactured and shipped from?
All PX1 Research peptides are manufactured in US-based cGMP-compliant facilities and shipped same-day (Monday through Friday) from logistics centers in California and Arizona.
How should lyophilized Cortagen be stored upon delivery?
Lyophilized Cortagen powder should be stored at -20°C or -80°C in a desiccated environment protected from direct light for long-term stability.
Which solvents are recommended for reconstituting Cortagen in a lab setting?
Cortagen dissolves readily in sterile phosphate-buffered saline (PBS, pH 7.4) or sterile laboratory-grade water. Reconstituted solutions should be aliquoted and frozen at -80°C.
Can institutions purchase bulk quantities of Cortagen for long-term projects?
Yes, university researchers and commercial laboratories can open wholesale accounts with PX1 Research to reserve dedicated single-synthesis lots for extended study pipelines.
Is Cortagen approved for clinical human use or therapeutic administration?
No. Cortagen is strictly a research chemical designated for in vitro, cellular, and animal laboratory experiments only. It is not intended for human consumption or therapeutic use.
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.