2. Membrane Transporter/Ion Channel Neuronal Signaling GPCR/G Protein
  3. Potassium Channel 5-HT Receptor
  4. Spadin TFA

Spadin TFA, a natural peptide derived from a propeptide released in blood, is a potent TREK-1 channel blocker with an IC50 value of 10 nM. Spadin TFA enhances dorsal raphe nucleus 5-HT neurotransmission in mice and induces hippocampal CREB activation and neurogenesis. Spadin TFA can be used for antidepressant research.

For research use only. We do not sell to patients.

Custom Peptide Synthesis

Spadin TFA Chemical Structure

Spadin TFA Chemical Structure

Size Price Stock Quantity
1 mg USD 150 In-stock
5 mg USD 380 In-stock
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Based on 1 publication(s) in Google Scholar

Other Forms of Spadin TFA:

Spadin TFA Related Antibodies

Top Publications Citing Use of Products

1 Publications Citing Use of MCE Spadin TFA

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5-HT1 Receptor 5-HT2 Receptor 5-HT3 Receptor 5-HT4 Receptor 5-HT5 Receptor 5-HT6 Receptor 5-HT7 Receptor 5-HT Receptor

  • Biological Activity

  • Purity & Documentation

  • References

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Description

Spadin TFA, a natural peptide derived from a propeptide released in blood, is a potent TREK-1 channel blocker with an IC50 value of 10 nM. Spadin TFA enhances dorsal raphe nucleus 5-HT neurotransmission in mice and induces hippocampal CREB activation and neurogenesis. Spadin TFA can be used for antidepressant research[1][2].

In Vitro

Spadin TFA (100 nM; COS-7 cells) has inhibitory effect of spadin on the TREK-1 channel and blocks 63% of the TREK-1 current stimulated by arachidonic acid[1].
Spadin TFA (100 nM) blocks the TREK-1 channels activity in CA3 hippocampal neurons on brain slices of wild-type mice[1].

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

Spadin TFA Related Antibodies
In Vivo

Spadin TFA (10 μM, 100 μL; i.p.; for 30 min; male C57Bl/6J and TREK-1 deficient mice) increases of the 5-HT neuron firing rate in the dorsal raphe nucleus (DRN)[2].
Spadin TFA (0.01-100 μM, 100 μL; ICV, i.p. and i.v.; daily, for 7 days; male C57Bl/6J and TREK-1 deficient mice) has anti-depressant behavior in mice[2].

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

Animal Model: Male C57Bl/6J and TREK-1 deficient mice[2]
Dosage: 10 μM
Administration: Intraperitoneal injection; for 30 min
Result: Increased of the 5-HT neuron firing rate in the dorsal raphe nucleus (DRN).
Animal Model: Male C57Bl/6J and TREK-1 deficient mice[2]
Dosage: 0.01-100 μM
Administration: Intracerebroventrical injection (100 nM), intraperitoneal injection (1-100 μM) and intravenous injection (0.01-1 μM); daily, for 7 days
Result: Had any effect on mouse locomotion analyzed in short- or long-time after the drug injection.
Molecular Weight

2126.36

Formula

C92H143F3N26O24
Appearance

Solid

Color

White to off-white

Sequence Shortening

YAPLPRWSGPIGVSWGLR
Shipping

Room temperature in continental US; may vary elsewhere.
Storage

Sealed storage, away from moisture and light

Powder -80°C 2 years
-20°C 1 year

*In solvent : -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture and light)

Solvent & Solubility
In Vitro: 

DMSO : 100 mg/mL (47.03 mM; Need ultrasonic; Hygroscopic DMSO has a significant impact on the solubility of product, please use newly opened DMSO)

H2O : 25 mg/mL (11.76 mM; Need ultrasonic)

Preparing
Stock Solutions
Concentration Solvent Mass 1 mg 5 mg 10 mg
1 mM 0.4703 mL 2.3514 mL 4.7029 mL
5 mM 0.0941 mL 0.4703 mL 0.9406 mL
View the Complete Stock Solution Preparation Table

* Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture and light). When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.

* Note: If you choose water as the stock solution, please dilute it to the working solution, then filter and sterilize it with a 0.22 μm filter before use.

  • Molarity Calculator

  • Dilution Calculator

Mass (g) = Concentration (mol/L) × Volume (L) × Molecular Weight (g/mol)

Mass
=
Concentration
×
Volume
×
Molecular Weight *

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)

This equation is commonly abbreviated as: C1V1 = C2V2

Concentration (start)

C1

×
Volume (start)

V1

=
Concentration (final)

C2

×
Volume (final)

V2

In Vivo:

Select the appropriate dissolution method based on your experimental animal and administration route.

For the following dissolution methods, please ensure to first prepare a clear stock solution using an In Vitro approach and then sequentially add co-solvents:
To ensure reliable experimental results, the clarified stock solution can be appropriately stored based on storage conditions. As for the working solution for in vivo experiments, it is recommended to prepare freshly and use it on the same day.
The percentages shown for the solvents indicate their volumetric ratio in the final prepared solution. If precipitation or phase separation occurs during preparation, heat and/or sonication can be used to aid dissolution.

  • Protocol 1

    Add each solvent one by one:  10% DMSO    40% PEG300    5% Tween-80    45% Saline

    Solubility: ≥ 2.5 mg/mL (1.18 mM); Clear solution

    This protocol yields a clear solution of ≥ 2.5 mg/mL (saturation unknown).

    Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (25.0 mg/mL) to 400 μL PEG300, and mix evenly; then add 50 μL Tween-80 and mix evenly; then add 450 μL Saline to adjust the volume to 1 mL.

    Preparation of Saline: Dissolve 0.9 g sodium chloride in ddH₂O and dilute to 100 mL to obtain a clear Saline solution.
  • Protocol 2

    Add each solvent one by one:  10% DMSO    90% (20% SBE-β-CD in Saline)

    Solubility: ≥ 2.5 mg/mL (1.18 mM); Clear solution

    This protocol yields a clear solution of ≥ 2.5 mg/mL (saturation unknown).

    Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (25.0 mg/mL) to 900 μL 20% SBE-β-CD in Saline, and mix evenly.

    Preparation of 20% SBE-β-CD in Saline (4°C, storage for one week): 2 g SBE-β-CD powder is dissolved in 10 mL Saline, completely dissolve until clear.

For the following dissolution methods, please prepare the working solution directly. It is recommended to prepare fresh solutions and use them promptly within a short period of time.
The percentages shown for the solvents indicate their volumetric ratio in the final prepared solution. If precipitation or phase separation occurs during preparation, heat and/or sonication can be used to aid dissolution.

  • Protocol 1

    Add each solvent one by one:  PBS

    Solubility: 50 mg/mL (23.51 mM); Clear solution; Need ultrasonic

In Vivo Dissolution Calculator
Please enter the basic information of animal experiments:

Dosage

mg/kg

Animal weight
(per animal)

g

Dosing volume
(per animal)

μL

Number of animals

Recommended: Prepare an additional quantity of animals to account for potential losses during experiments.
Calculation results:
Working solution concentration: mg/mL
This product has good water solubility, please refer to the measured solubility data in water/PBS/Saline for details.
The concentration of the stock solution you require exceeds the measured solubility. The following solution is for reference only.If necessary, please contact MedChemExpress (MCE).
Purity & Documentation
References

Complete Stock Solution Preparation Table

* Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture and light). When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.

Optional Solvent Concentration Solvent Mass 1 mg 5 mg 10 mg 25 mg
H2O / DMSO 1 mM 0.4703 mL 2.3514 mL 4.7029 mL 11.7572 mL
5 mM 0.0941 mL 0.4703 mL 0.9406 mL 2.3514 mL
10 mM 0.0470 mL 0.2351 mL 0.4703 mL 1.1757 mL
DMSO 15 mM 0.0314 mL 0.1568 mL 0.3135 mL 0.7838 mL
20 mM 0.0235 mL 0.1176 mL 0.2351 mL 0.5879 mL
25 mM 0.0188 mL 0.0941 mL 0.1881 mL 0.4703 mL
30 mM 0.0157 mL 0.0784 mL 0.1568 mL 0.3919 mL
40 mM 0.0118 mL 0.0588 mL 0.1176 mL 0.2939 mL

* Note: If you choose water as the stock solution, please dilute it to the working solution, then filter and sterilize it with a 0.22 μm filter before use.

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Spadin TFA Related Classifications

Help & FAQs
  • Do most proteins show cross-species activity?

    Species cross-reactivity must be investigated individually for each product. Many human cytokines will produce a nice response in mouse cell lines, and many mouse proteins will show activity on human cells. Other proteins may have a lower specific activity when used in the opposite species.

Keywords:

SpadinPotassium Channel5-HT ReceptorKcsASerotonin Receptor5-hydroxytryptamine ReceptorTREK-15-HTantidepressantCREBneurogenesisCOS-7 cellsInhibitorinhibitorinhibit

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