2. GPCR/G Protein Neuronal Signaling
  3. Neurotensin Receptor
  4. SR 142948

SR 142948 is an orally active and selective non-peptide neurotensin receptor (NT) antagonist with IC50s of 1.19 nM, 0.32 nM, 3.96 nM in h-NTR1-CHO cells, HT-29 cells, and adult rat brain, respectively. SR 142948 antagonizes NT-induced inositol monophosphate formation in HT-29 cells with an IC50 of 3.9 nM. SR 142948 blocks hypothermia, analgesia and steering behavior induced by NT in vivo. SR 142948 shows blood-brain permeability and can be used in study of psychiatric disorders.

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SR 142948 Chemical Structure

SR 142948 Chemical Structure

CAS No. : 184162-64-9

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Based on 1 publication(s) in Google Scholar

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Description

SR 142948 is an orally active and selective non-peptide neurotensin receptor (NT) antagonist with IC50s of 1.19 nM, 0.32 nM, 3.96 nM in h-NTR1-CHO cells, HT-29 cells, and adult rat brain, respectively. SR 142948 antagonizes NT-induced inositol monophosphate formation in HT-29 cells with an IC50 of 3.9 nM. SR 142948 blocks hypothermia, analgesia and steering behavior induced by NT in vivo. SR 142948 shows blood-brain permeability and can be used in study of psychiatric disorders[1][2].

In Vitro

SR 142948 (1 µM; 90 min) inhibits expression of c-fos and krox24 in CHO-hNT1-R cells[1].
SR 142948 (0-1 µM; 1 h) exhibits good antagonistic activity by inhibiting [125I-Tyr3]NT binds to h-NTR1-CHO and HT 29 cell membranes, with IC50s of 1.19 and 0.32 nM, respectively[2].
SR 142948 (0-1 µM; 30 min) antagonizes production of IP1 stimulated by NT both in h-NTR1-CHO and HT 29 cells, in a concentration-dependent manner[2].
SR 142948 (1, 10 nM; 60-80 s) antagonizes intracellular calcium mobilization stimulated by NT in h-NTR1-CHO cells[2].

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

SR 142948 Related Antibodies
In Vivo

SR 142948 (2 µg/kg; p.o.; single) inhibits the turning behavior induced by NT (10 pg/mouse)[2].
SR 142948 (0.01, 0.03, 0.3 mg/kg; i.p.; single) prevents the enhancement of ACh release produced by NT (100 nM), in a dose-dependent manner[2].
SR 142948 (0-10 mg/kg; p.o.; single) partially but significantly blocks NT-induced hypothermia (53% at 2 mg/kg in rats and 54% at 4 mg/kg in mice)[2].

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

Animal Model: Female Swiss albino CD1 mice (25-30 g; intrastriatal injection of 10 pg/mouse NT)[2].
Dosage: 2 µg/kg
Administration: Oral administration; single.
Result: Inhibited the turning behavior with maximal and significant antagonism between 1-2 h after administration.
Molecular Weight

685.85

Formula

C39H51N5O6
CAS No.
Appearance

Solid

Color

White to off-white

SMILES

O=C(C1=NN(C2=C(C=C(C(N(C)CCCN(C)C)=O)C=C2)C(C)C)C(C3=C(C=CC=C3OC)OC)=C1)NC4([C@H]5C[C@H](C6)C[C@@H]4C[C@H]6C5)C(O)=O
Shipping

Room temperature in continental US; may vary elsewhere.
Storage
Powder -20°C 3 years
4°C 2 years
In solvent -80°C 6 months
-20°C 1 month
Solvent & Solubility
In Vitro: 

DMSO : 100 mg/mL (145.80 mM; Need ultrasonic; Hygroscopic DMSO has a significant impact on the solubility of product, please use newly opened DMSO)

Preparing
Stock Solutions
Concentration Solvent Mass 1 mg 5 mg 10 mg
1 mM 1.4580 mL 7.2902 mL 14.5804 mL
5 mM 0.2916 mL 1.4580 mL 2.9161 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. When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.

  • Molarity Calculator

  • Dilution Calculator

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

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

This equation is commonly abbreviated as: C1V1 = C2V2

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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: ≥ 5 mg/mL (7.29 mM); Clear solution

    This protocol yields a clear solution of ≥ 5 mg/mL (saturation unknown).

    Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (50.0 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: ≥ 5 mg/mL (7.29 mM); Clear solution

    This protocol yields a clear solution of ≥ 5 mg/mL (saturation unknown).

    Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (50.0 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.
In Vivo Dissolution Calculator
Please enter the basic information of animal experiments:

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Recommended: Prepare an additional quantity of animals to account for potential losses during experiments.
Please enter your animal formula composition:
%
DMSO +
% 
+
%
Tween-80 +
%
Saline
Recommended: Keep the proportion of DMSO in working solution below 2% if your animal is weak.
The co-solvents required include: DMSO, . All of co-solvents are available by MedChemExpress (MCE). , Tween 80. All of co-solvents are available by MedChemExpress (MCE).
Calculation results:
Working solution concentration: mg/mL
Method for preparing stock solution: mg drug dissolved in μL  DMSO (Stock solution concentration: mg/mL).
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).
Method for preparing in vivo working solution for animal experiments: Take μL DMSO stock solution, add μL . μL , mix evenly, next add μL Tween 80, mix evenly, then add μL Saline.
 If the continuous dosing period exceeds half a month, please choose this protocol carefully.
Please ensure that the stock solution in the first step is dissolved to a clear state, and add co-solvents in sequence. You can use ultrasonic heating (ultrasonic cleaner, recommended frequency 20-40 kHz), vortexing, etc. to assist dissolution.
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. 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
DMSO 1 mM 1.4580 mL 7.2902 mL 14.5804 mL 36.4511 mL
5 mM 0.2916 mL 1.4580 mL 2.9161 mL 7.2902 mL
10 mM 0.1458 mL 0.7290 mL 1.4580 mL 3.6451 mL
15 mM 0.0972 mL 0.4860 mL 0.9720 mL 2.4301 mL
20 mM 0.0729 mL 0.3645 mL 0.7290 mL 1.8226 mL
25 mM 0.0583 mL 0.2916 mL 0.5832 mL 1.4580 mL
30 mM 0.0486 mL 0.2430 mL 0.4860 mL 1.2150 mL
40 mM 0.0365 mL 0.1823 mL 0.3645 mL 0.9113 mL
50 mM 0.0292 mL 0.1458 mL 0.2916 mL 0.7290 mL
60 mM 0.0243 mL 0.1215 mL 0.2430 mL 0.6075 mL
80 mM 0.0182 mL 0.0911 mL 0.1823 mL 0.4556 mL
100 mM 0.0146 mL 0.0729 mL 0.1458 mL 0.3645 mL
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SR 142948 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:

SR 142948184162-64-9SR142948SR-142948Neurotensin Receptordopaminepsychotic disordersneurotensinHT 29CHO cellsInhibitorinhibitorinhibit

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