LEAP-2
Based on 1 publication(s) in Google Scholar
LEAP-2 (Human liver expressed antimicrobial peptide-2) is a GHS-R1a antagonist, with an IC50 of 6.0 nM. LEAP-2 suppresses the orexigenic effect of ghrelin. LEAP-2 attenuates ghrelin-induced growth hormone (GH) release and reduces basal food intake. LEAP-2 exhibits antimicrobial activity against microbial model organisms. LEAP-2 can be used for the study of obesity and infection.
For research use only. We do not sell to patients.
- Purity: 97.75%
- CAS No.: 1683582-94-6
- Formula: C191H316N64O57S5
- Molecular Weight:4581.27
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Storage:
Sealed storage, away from moisture.
Powder -80°C, 2 years , -20°C, 1 year* In solvent : -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture)
To place orders, for customer services and technical support, please contact: MedChemExpress USA
Tel: 609-228-6898 E-mail: [email protected] [email protected]
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Biological Activity
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Chemical Information
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Solvent & Solubility
- Purity & Documentation
- References
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Help & FAQs
Publications Citing Use of MedChemExpress (MCE) LEAP-2
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Biological Activity
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GHSR1a 6 nM (IC50) |
LEAP-2 (1.563-100 μg/mL, 24 h) exhibits selective antimicrobial activity against Vibrio vulnificus, Vibrio alginolyticus, Vibrio anguillarum, Aeromonas hydrophila, and Staphylococcus aureus, with MIC values of 50 μg/mL, 100 μg/mL, 12.5 μg/mL, 12.5 μg/mL, and 100 μg/mL respectively[3].
LEAP-2 (1-10 μg/mL, 12 h) induces iNOS activity in barbel steed monocytes/macrophages (MO/MΦ)[3].
LEAP-2(1-10 μg/mL, 12 h) induces respiratory burst in barbel steed MO/MΦ[3].
LEAP-2 (1-10 μg/mL, 12 h) upregulates the expression of pro-inflammatory cytokines IFN-γ, TNF-α, and IL-1β in barbel steed MO/MΦ[3].
MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.
LEAP2 (3 μmol/kg, s.c., once) completely abolishes ghrelin-induced food intake in mice[1].
MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.
| NCT Number | Sponsor | Condition | Start Date |
Phase
|
|---|---|---|---|---|
| NCT01329991 | Plexxikon| | 2011-05 | PHASE1 |
Chemical Information
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CAS No. 1683582-94-6
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Appearance Solid
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Molecular Weight 4581.27
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Formula C191H316N64O57S5
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Color White to off-white
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Synonyms
Human liver expressed antimicrobial peptide-2
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Sequence
Met-Thr-Pro-Phe-Trp-Arg-Gly-Val-Ser-Leu-Arg-Pro-Ile-Gly-Ala-Ser-Cys-Arg-Asp-Asp-Ser-Glu-Cys-Ile-Thr-Arg-Leu-Cys-Arg-Lys-Arg-Arg-Cys-Ser-Leu-Ser-Val-Ala-Gln-Glu (Disulfide bridge:Cys17-Cys28;Cys23-Cys33)
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Sequence Shortening
MTPFWRGVSLRPIGASCRDDSECITRLCRKRRCSLSVAQE (Disulfide bridge:Cys17-Cys28;Cys23-Cys33)
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Shipping
Room temperature in continental US; may vary elsewhere.
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Storage
Sealed storage, away from moisture
Powder -80°C 2 years -20°C 1 year * In solvent : -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture)
Publications (1)
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Journal Impact Factor
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Most Recent
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bioRxiv
MRAP2 potentiates GPCR signaling by conserved mechanisms that are disrupted by obesity-associated genetic variants. [Abstract]2025 Sep 28:2025.09.26.678709. PMID: 41040264
Solvent & Solubility
DMSO : 100 mg/mL (21.83 mM; Need ultrasonic; Hygroscopic DMSO has a significant impact on the solubility of product, please use newly opened DMSO)
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). When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.
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). When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.
Concentration (start) × Volume (start) = Concentration (final) × Volume (final)
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.
Add each solvent one by one: 10% DMSO 40% PEG300 5% Tween-80 45% Saline
Solubility: ≥ 2.5 mg/mL (0.55 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.
Add each solvent one by one: 10% DMSO 90% (20% SBE-β-CD in Saline)
Solubility: ≥ 2.5 mg/mL (0.55 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.
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:
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%DMSO +
Recommended: Keep the proportion of DMSO in working solution below 2% if your animal is weak.
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%+
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+%Tween-80 + +
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%Saline +
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).
Working solution concentration: 0.22 mg/mL
Method for preparing stock solution: mg drug dissolved in μL DMSO. Stock solution concentration: mg/mL. * In solvent : -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture)
1. Take μL DMSO stock solution;
2. Add μL .
μL , mix evenly;
3. Then add μL Tween 80, mix evenly;
4. Then add μL
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
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Data Sheet (273 KB)
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SDS (252 KB)
- English - EN (252 KB)
- Français - FR (252 KB)
- Deutsch - DE (252 KB)
- Norwegian - NO (252 KB)
- Español - ES (252 KB)
- Swedish - SV (252 KB)
- Italian - IT (252 KB)
- Korean - KR (252 KB)
- Portuguese - PT (252 KB)
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Handling Instructions (2659 KB)
References
[1]. Ge X, et al. LEAP2 Is an Endogenous Antagonist of the Ghrelin Receptor. Cell Metab. 2018 Feb 6;27(2):461-469.e6. [Content Brief]
[2]. Krause A, et al. Isolation and biochemical characterization of LEAP-2, a novel blood peptide expressed in the liver. Protein Sci. 2003 Jan;12(1):143-52. [Content Brief]
[3]. Chen J, et al. Host defense peptide LEAP-2 contributes to monocyte/macrophage polarization in barbel steed (Hemibarbus labeo). Fish Shellfish Immunol. 2019 Apr;87:184-192. doi: 10.1016/j.fsi.2019.01.015 [Content Brief]
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). 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 | 0.2183 mL | 1.0914 mL | 2.1828 mL | 5.4570 mL |
| 5 mM | 0.0437 mL | 0.2183 mL | 0.4366 mL | 1.0914 mL | |
| 10 mM | 0.0218 mL | 0.1091 mL | 0.2183 mL | 0.5457 mL | |
| 15 mM | 0.0146 mL | 0.0728 mL | 0.1455 mL | 0.3638 mL | |
| 20 mM | 0.0109 mL | 0.0546 mL | 0.1091 mL | 0.2729 mL |
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