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Spiroxatrine

Alias: R 5188; Espiroxatrina; Spiroxatrine
Cat No.:V15152 Purity: ≥98%
Spiroxatrine (R 5188) is a selective 5-HT1α and α-adrenergic (α2-adrenergic) dual antagonist, with Kis of 3.94 and 224000 for 5-HT1α, 5-HT1 β and 5-HT2 respectively.
Spiroxatrine
Spiroxatrine Chemical Structure CAS No.: 1054-88-2
Product category: New1
This product is for research use only, not for human use. We do not sell to patients.
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Product Description
Spiroxatrine (R 5188) is a selective 5-HT1α and α-adrenergic (α2-adrenergic) dual antagonist, with Kis of 3.94 and 224000 for 5-HT1α, 5-HT1 β and 5-HT2 respectively. , 118.5 nM. Spiroxatrine (R 5188) has sedative effects.
Spiroxatrine (CAS# 1054-88-2), also known as R 5188, is a selective dual antagonist of 5-HT1A and α2-adrenergic receptors. It has Ki values of 3.94 nM for 5-HT1A, 224000 nM for 5-HT1B, and 118.5 nM for 5-HT2 receptors. Spiroxatrine exhibits sedative effects and has been studied for its anxiolytic properties in combination with buspirone.
Biological Activity I Assay Protocols (From Reference)
Targets
Spiroxatrine targets serotonin 5-HT1A receptors and α2-adrenergic receptors. It is a selective antagonist of 5-HT1A with a Ki of 3.94 nM, demonstrating high affinity and selectivity for 5-HT1A over 5-HT1B (Ki = 224000 nM) and 5-HT2 (Ki = 118.5 nM). Spiroxatrine is also a potent α2C adrenergic receptor antagonist.
ln Vitro
In α2A/D-initiin receptor knockout mice, Spirosatin (0.01-0.1 μM, 15 minutes) increases vas deferens tissue contraction [2].
Spiroxatrine is a selective, dual antagonist of 5-HT1A and α2-adrenergic receptors. It exhibits Ki values of 3.94 nM for 5-HT1A, 224000 nM for 5-HT1B, and 118.5 nM for 5-HT2 receptors. The compound's high affinity for 5-HT1A and α2-adrenergic receptors distinguishes it from other serotonergic compounds.
ln Vivo
In the hind paw, carrageenan-induced signal withdrawal latency and nerve damage are both increased by 1-to 25-ug intraperitoneal injection over a 5-day period of time [3]. The efficacy of fluoxetine in decreasing selective proliferative alcoholophilic P-lineage-dependent vitamin A recovery is enhanced by spiroxatrine (4 mg/kg/day, i.p., 5 minutes) [4].
Spiroxatrine exhibits sedative effects in vivo. It has demonstrated anxiolytic effects when used in combination with buspirone. As a 5-HT1A and α2-adrenergic receptor antagonist, it modulates serotonin and noradrenaline signaling in the central nervous system. Specific animal model data are not extensively detailed.
Enzyme Assay
Spiroxatrine's binding affinity to 5-HT1A, 5-HT1B, 5-HT2, and α2-adrenergic receptors can be assessed using radioligand binding assays with membrane preparations from cells expressing recombinant receptors. Competition binding experiments are performed with increasing concentrations of spiroxatrine against a fixed concentration of a radiolabeled receptor-specific ligand. Ki values are calculated from competition curves.
Cell Assay
The functional activity of spiroxatrine at 5-HT1A and α2-adrenergic receptors is evaluated in cell-based assays. Cells expressing recombinant 5-HT1A or α2-adrenergic receptors are treated with increasing concentrations of spiroxatrine. Receptor-mediated signaling pathways (e.g., cAMP modulation or calcium mobilization) are measured. Antagonist activity is assessed by the compound's ability to block agonist-induced signaling.
Animal Protocol
Animal/Disease Models: nerve injury rat model and carrageenan-induced rat inflammation model [3] Usage and
Doses: 1, 10, 25 ug, 5 days
Route of Administration: intraperitoneal (ip) injection
Experimental Results: Increased hind paw response to heat and Withdrawal latency to mechanical stimulation.

Animal/Disease Models: Fluoxetine induces a decrease in P-line ethanol intake in rats [4]
Doses: 4 mg/kg/day, 5 minutes
Route of Administration: intraperitoneal (ip) injection
Experimental Results:Selectively increases fluoxetine-induced voluntariness Oral ethanol intake produces alcohol-preferring P-strain rats.
Spiroxatrine is administered orally or intraperitoneally in animal models of anxiety or sedation. In rodent models (e.g., elevated plus maze, open field test, or sedative assays), spiroxatrine is given at various doses. Behavioral responses are assessed to evaluate anxiolytic and sedative effects.
ADME/Pharmacokinetics
Spiroxatrine has a molecular formula of C22H25N3O3 and a molecular weight of 379.45 g/mol. It is soluble in DMSO. Its exact mass is 379.1896. Specific pharmacokinetic parameters such as half-life and bioavailability are not extensively detailed.
Toxicity/Toxicokinetics
The toxicity profile of spiroxatrine is not extensively documented. As a 5-HT1A and α2-adrenergic receptor antagonist, potential adverse effects may include sedation and cardiovascular effects. Specific LD50 values and organ-specific toxicity data are not readily available.
References

[1]. Spiroxatrine: a selective serotonin1A receptor antagonist. Eur J Pharmacol. 1986 May 13;124(1-2):207-8.

[2]. Investigation of neurotransmission in vas deferens from alpha(2A/D)-adrenoceptor knockout mice. Br J Pharmacol. 2002 Jul;136(6):857-64.

[3]. Involvement of 5-hydroxytryptamine(1A) receptors in the descending anti-nociceptive pathway from periaqueductal gray to the spinal dorsal horn in intact rats, rats with nerve injury and rats with inflammation. Neuroscience. 2002;112(2):399-407.

[4]. Spiroxatrine augments fluoxetine-induced reduction of ethanol intake by the P line of rats. Pharmacol Biochem Behav. 1989 Oct;34(2):381-6.

Additional Infomation
8-(2,3-dihydro-1,4-benzodioxin-3-ylmethyl)-1-phenyl-1,3,8-triazaspiro[4.5]decane-4-one is a member of the imidazolide family of compounds.
Spiroxatrine (CAS# 1054-88-2) is also known as R 5188. It is a selective dual antagonist of 5-HT1A (Ki = 3.94 nM) and α2-adrenergic receptors. Spiroxatrine exhibits sedative effects and has been studied for anxiolytic properties in combination with buspirone.
These protocols are for reference only. InvivoChem does not independently validate these methods.
Physicochemical Properties
Molecular Formula
C22H25N3O3
Molecular Weight
379.46
Exact Mass
379.19
CAS #
1054-88-2
PubChem CID
5268
Appearance
White to off-white solid powder
Density
1.32g/cm3
Boiling Point
602.8ºC at 760mmHg
Flash Point
318.4ºC
Vapour Pressure
1.74E-14mmHg at 25°C
Index of Refraction
1.665
LogP
2.586
Hydrogen Bond Donor Count
1
Hydrogen Bond Acceptor Count
5
Rotatable Bond Count
3
Heavy Atom Count
28
Complexity
557
Defined Atom Stereocenter Count
0
InChi Key
JVGBTTIJPBFLTE-UHFFFAOYSA-N
InChi Code
InChI=1S/C22H25N3O3/c26-21-22(25(16-23-21)17-6-2-1-3-7-17)10-12-24(13-11-22)14-18-15-27-19-8-4-5-9-20(19)28-18/h1-9,18H,10-16H2,(H,23,26)
Chemical Name
8-(2,3-dihydro-1,4-benzodioxin-3-ylmethyl)-1-phenyl-1,3,8-triazaspiro[4.5]decan-4-one
Synonyms
R 5188; Espiroxatrina; Spiroxatrine
HS Tariff Code
2934.99.9001
Storage

Powder      -20°C    3 years

                     4°C     2 years

In solvent   -80°C    6 months

                  -20°C    1 month

Shipping Condition
Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)
Solubility Data
Solubility (In Vitro)
DMSO : ~1.92 mg/mL (~5.06 mM)
Solubility (In Vivo)
Note: Listed below are some common formulations that may be used to formulate products with low water solubility (e.g. < 1 mg/mL), you may test these formulations using a minute amount of products to avoid loss of samples.

Injection Formulations
(e.g. IP/IV/IM/SC)
Injection Formulation 1: DMSO : Tween 80: Saline = 10 : 5 : 85 (i.e. 100 μL DMSO stock solution 50 μL Tween 80 850 μL Saline)
*Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH ₂ O to obtain a clear solution.
Injection Formulation 2: DMSO : PEG300Tween 80 : Saline = 10 : 40 : 5 : 45 (i.e. 100 μL DMSO 400 μLPEG300 50 μL Tween 80 450 μL Saline)
Injection Formulation 3: DMSO : Corn oil = 10 : 90 (i.e. 100 μL DMSO 900 μL Corn oil)
Example: Take the Injection Formulation 3 (DMSO : Corn oil = 10 : 90) as an example, if 1 mL of 2.5 mg/mL working solution is to be prepared, you can take 100 μL 25 mg/mL DMSO stock solution and add to 900 μL corn oil, mix well to obtain a clear or suspension solution (2.5 mg/mL, ready for use in animals).
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Injection Formulation 4: DMSO : 20% SBE-β-CD in saline = 10 : 90 [i.e. 100 μL DMSO 900 μL (20% SBE-β-CD in saline)]
*Preparation of 20% SBE-β-CD in Saline (4°C,1 week): Dissolve 2 g SBE-β-CD in 10 mL saline to obtain a clear solution.
Injection Formulation 5: 2-Hydroxypropyl-β-cyclodextrin : Saline = 50 : 50 (i.e. 500 μL 2-Hydroxypropyl-β-cyclodextrin 500 μL Saline)
Injection Formulation 6: DMSO : PEG300 : castor oil : Saline = 5 : 10 : 20 : 65 (i.e. 50 μL DMSO 100 μLPEG300 200 μL castor oil 650 μL Saline)
Injection Formulation 7: Ethanol : Cremophor : Saline = 10: 10 : 80 (i.e. 100 μL Ethanol 100 μL Cremophor 800 μL Saline)
Injection Formulation 8: Dissolve in Cremophor/Ethanol (50 : 50), then diluted by Saline
Injection Formulation 9: EtOH : Corn oil = 10 : 90 (i.e. 100 μL EtOH 900 μL Corn oil)
Injection Formulation 10: EtOH : PEG300Tween 80 : Saline = 10 : 40 : 5 : 45 (i.e. 100 μL EtOH 400 μLPEG300 50 μL Tween 80 450 μL Saline)


Oral Formulations
Oral Formulation 1: Suspend in 0.5% CMC Na (carboxymethylcellulose sodium)
Oral Formulation 2: Suspend in 0.5% Carboxymethyl cellulose
Example: Take the Oral Formulation 1 (Suspend in 0.5% CMC Na) as an example, if 100 mL of 2.5 mg/mL working solution is to be prepared, you can first prepare 0.5% CMC Na solution by measuring 0.5 g CMC Na and dissolve it in 100 mL ddH2O to obtain a clear solution; then add 250 mg of the product to 100 mL 0.5% CMC Na solution, to make the suspension solution (2.5 mg/mL, ready for use in animals).
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Oral Formulation 3: Dissolved in PEG400
Oral Formulation 4: Suspend in 0.2% Carboxymethyl cellulose
Oral Formulation 5: Dissolve in 0.25% Tween 80 and 0.5% Carboxymethyl cellulose
Oral Formulation 6: Mixing with food powders


Note: Please be aware that the above formulations are for reference only. InvivoChem strongly recommends customers to read literature methods/protocols carefully before determining which formulation you should use for in vivo studies, as different compounds have different solubility properties and have to be formulated differently.

 (Please use freshly prepared in vivo formulations for optimal results.)
Preparing Stock Solutions 1 mg 5 mg 10 mg
1 mM 2.6353 mL 13.1766 mL 26.3532 mL
5 mM 0.5271 mL 2.6353 mL 5.2706 mL
10 mM 0.2635 mL 1.3177 mL 2.6353 mL

*Note: Please select an appropriate solvent for the preparation of stock solution based on your experiment needs. For most products, DMSO can be used for preparing stock solutions (e.g. 5 mM, 10 mM, or 20 mM concentration); some products with high aqueous solubility may be dissolved in water directly. Solubility information is available at the above Solubility Data section. Once the stock solution is prepared, aliquot it to routine usage volumes and store at -20°C or -80°C. Avoid repeated freeze and thaw cycles.

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Note: Chemical formula is case sensitive: C12H18N3O4  c12h18n3o4
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In vivo Formulation Calculator (Clear solution)
Step 1: Enter information below (Recommended: An additional animal to make allowance for loss during the experiment)
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Calculation results

Working concentration mg/mL;

Method for preparing DMSO stock solution mg drug pre-dissolved in μL DMSO (stock solution concentration mg/mL). Please contact us first if the concentration exceeds the DMSO solubility of the batch of drug.

Method for preparing in vivo formulation:Take μL DMSO stock solution, next add μL PEG300, mix and clarify, next addμL Tween 80, mix and clarify, next add μL ddH2O,mix and clarify.

(1) Please be sure that the solution is clear before the addition of next solvent. Dissolution methods like vortex, ultrasound or warming and heat may be used to aid dissolving.
             (2) Be sure to add the solvent(s) in order.

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