Galanin (1-13)-Spantide I CAS NO.143868-20-6

Galanin (1-13)-Spantide I (CAS: 143868-20-6) is a synthetic chimeric peptide antagonist that combines the N-terminal 1-13 fragment of galanin with the potent neurokinin-1 (NK1) receptor antagonist Spantide I. This dual-targeting molecule is designed to simultaneously inhibit signaling through galanin receptors and substance P receptors (NK1), making it a unique pharmacological tool for studying neuropeptide interact…

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TECHNICAL SPECIFICATIONS

Item	Specification
Product Name	Galanin (1-13)-Spantide I
CAS NO.	143868-20-6
Appearance	White to off-white lyophilized powder
Molecular Formula	C138H199N35O30
Molecular Weight	2828.34 g/mol
Purity (RP-HPLC)	≥ 95.0%
Solubility	Soluble in water (≥5 mg/mL), dilute acetic acid, and DMSO
Endotoxin	< 1.0 EU/mg
Biological Activity	Potent galanin receptor antagonist; blocks galanin-mediated signaling at GALR1, GALR2, and GALR3 receptors.
Storage Conditions	Store at -20°C to -80°C; avoid repeated freeze-thaw cycles. Reconstituted solution can be stored at 4°C for up to 1 week or at -20°C for up to 3 months.
Stock Location	Stock in USA
MOQ	1g

1.MECHANISM OF ACTION

Galanin (1-13) Fragment: Competitively binds to galanin receptors (GalR1, GalR2, GalR3), particularly at the N-terminal recognition site, blocking endogenous galanin from activating G protein-coupled signaling pathways (Gi/o-mediated cAMP inhibition and Gq-mediated calcium mobilization).

Spantide I Component: Acts as a competitive antagonist at neurokinin-1 (NK1) receptors, preventing substance P binding and subsequent activation of phospholipase C, protein kinase C, and inflammatory/neuroexcitatory pathways.

2.PRODUCT INDICATIONS

Pain Pathway Studies: Investigating synergistic/opposing roles of galanin and substance P in nociceptive transmission in acute, inflammatory, and neuropathic pain models.

Neurogenic Inflammation Research: Studying peptide-mediated inflammation where galanin and substance P co-modulate vascular permeability and immune cell activation.

Co-transmission Analysis: Examining functional interactions between galaninergic and tachykininergic systems in central and peripheral neurons.

Spinal Cord & DRG Research: Mapping and modulating peptide interactions in spinal nociceptive processing and sensory ganglia.

Receptor Cross-talk Studies: Investigating signaling interactions between GalR and NK1 receptor systems in neural circuits.

Prototype Therapeutic Screening: Evaluating dual antagonism as a potential strategy for chronic pain or neuroinflammatory conditions.

3.CLINICAL EFFICACY OF PRODUCT

Preclinical studies in rodent models demonstrate that this chimera produces more potent antinociceptive effects in inflammatory and neuropathic pain tests compared to individual galanin or NK1 antagonists alone, suggesting synergistic benefits of dual receptor blockade.

No human trials have been conducted with Galanin (1-13)-Spantide I. Its clinical efficacy is unknown, and its pharmacokinetic profile (including stability, blood-brain barrier penetration, and potential side effects) has not been characterized in humans.

Indirect therapeutic relevance lies in validating the dual receptor blockade concept for conditions like chronic pain, migraine, or neuroinflammatory disorders. However, any future drug development would require optimization of selectivity, pharmacokinetics, and safety profile, which this unmodified chimera lacks.

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