Dihexa — Neurotrophic Peptide Research Article (Educational • Research Use Only)
Overview Dihexa (NhexanoicTyrIle(6) aminohexanoic amide) is a synthetic peptide derivative of Angiotensin IV, designed to study neurotrophic and cognitiveenhancing properties. Developed by researchers at Washington State University, Dihexa was engineered to overcome limitations in stability and blood–brainbarrier permeability associated with native neuropeptides. In research contexts, Dihexa has been shown to enhance synaptogenesis, neuronal connectivity, and cognitive performance in animal models, positioning it as a key compound of interest in neurodegenerative and regenerative neuroscience. Mechanism of Action (Research Context) Dihexa functions primarily through potentiation of the hepatocyte growth factor (HGF) and cMet receptor signaling pathway. This pathway is associated with neuronal survival, differentiation, and synaptic plasticity. By enhancing the binding affinity between HGF and its receptor cMet, Dihexa promotes downstream activation of key intracellular cascades, including PI3K/Akt and MAPK/ERK. These cascades are critical regulators of neurogenesis, dendritic arborization, and synaptic repair. In preclinical models, Dihexa has demonstrated robust synaptogenic activity, leading to the formation of new dendritic spines and restoration of synaptic density in hippocampal neurons. This distinguishes Dihexa from traditional cognitive enhancers that modulate neurotransmitter signaling without structural neural regeneration. Its lipidsoluble structure allows it to cross the blood–brain barrier efficiently, expanding its utility for central nervous system (CNS) research. Potential Research Benefits (Reported in Literature) • Promotes synaptogenesis and dendritic spine density in hippocampal neurons • Enhances cognitive performance and memory retention in preclinical models • Exhibits neuroprotective effects against oxidative and excitotoxic stress • Supports neuronal survival and synaptic maintenance in neurodegenerative conditions • Investigated for applications in Alzheimer’s disease, traumatic brain injury (TBI), and cognitive decline • Activates HGF/cMet signaling with low offtarget activity in vitro Selected Research Highlights • Synaptic Plasticity: In vitro studies show that Dihexa increases synapse formation and improves functional connectivity within hippocampal networks. • Cognitive Enhancement: Animal models demonstrate significant improvements in maze learning and objectrecognition tasks, indicating enhanced longterm potentiation (LTP). • Neuroprotection: Dihexatreated neurons exhibit resistance to glutamateinduced excitotoxicity and oxidative damage. • Regenerative Mechanism: Unlike acetylcholinesterase inhibitors or AMPA modulators, Dihexa repairs neuronal architecture rather than temporarily altering neurotransmission. Chemical / Physical Information • Chemical Name: NhexanoicTyrIle(6) aminohexanoic amide • Molecular Formula: C₃₉H₆₆N₆O₆ • Molecular Weight: 718.98 Da • Appearance: White crystalline powder • Solubility: Soluble in DMSO and ethanol; limited solubility in water • Storage: Lyophilized powder should be stored at −20 °C, protected from light and moisture; reconstituted solutions should be aliquoted and frozen to prevent repeated freeze–thaw cycles. Regulatory & Compliance Notes Dihexa is not approved for therapeutic or clinical use by major regulatory agencies. It is intended solely for research and laboratory applications. Proper handling requires adherence to institutional biosafety protocols and compliance with relevant chemicalstorage and documentation standards, including Certificates of Analysis (COA) and Material Safety Data Sheets (MSDS). References (Selection) 1. Benoist CC et al. (2014). The neurotrophic compound Dihexa enhances synaptogenesis and improves cognitive function. J Pharmacol Exp Ther. 2. Wright JW, Harding JW. (2015). The brain angiotensin system and Dihexa in neuroregeneration. Front Neurosci. 3. McCoy AT et al. (2013). HGF/cMetmediated synaptic plasticity and neuroprotection. Neuroscience. 4. Wright JW et al. (2016). Angiotensin IV analogs as cognitive enhancers and neuroregenerative agents. Curr Med Chem. 5. Chen Q et al. (2017). Peptidebased strategies targeting neurotrophic signaling for CNS repair. Brain Res Bull. Disclaimer This article is intended for educational and research purposes only. Dihexa is not approved for human or veterinary use. All experiments and studies must comply with institutional, ethical, and legal standards for peptide research and biosafety. ————————— Selected References PMID: 23995713 — Dihexainduced synaptogenesis and cognitive enhancement PMID: 18603278 — HGF/cMet pathway activation in neural repair PMID: 23727840 — Neurotrophic peptide mechanisms and synaptic plasticity PMID: 29224772 — Peptidebased strategies for CNS regeneration Frontiers in Neuroscience — Peptide modulation of memory and cognition Journal of Peptide Science — Neuroactive peptides and brain repair mechanisms FAQ : What is Dihexa? Dihexa is a small m
For research use only. Not for human consumption.