LSALT peptide
Based on 1 Customer Validation
LSALT peptide is a selective DPEP-1 inhibitor with selectivity over DPEP2/3. LSALT peptide inhibits neutrophil and monocyte/macrophage recruitment, inflammation, and tissue injury. LSALT peptide reduces kidney damage, improves survival in murine sepsis and endotoxemia models. LSALT peptide can be used for the research of COVID-19, sepsis, acute respiratory distress syndrome, and acute kidney injury.
For research use only. We do not sell to patients.
- Purity : 99.30%
- CAS No.: 2567713-50-0
- Formula: C85H136N20O21
- Molecular Weight:1774.11
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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)
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
- Protocols
- Purity & Documentation
- References
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Help & FAQs
Biological Activity
Description
In Vitro
LSALT peptide binds specifically to human DPEP1, with no detectable binding to the closely related DPEP2 or DPEP3 proteins expressed on COS1 cells[2].
LSALT peptide (4 h) inhibits human neutrophil binding to pro-inflammatory stimulus-activated primary human lung endothelial cells[2].
MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only. Further protocols information, click here.
In Vivo
LSALT peptide (i.v.; single dose (5 minutes post-LPS) or two doses (5 minutes and 18 hours post-LPS)) significantly improves survival in a lethal murine endotoxemia model, and reduces LPS-induced acute lung injury[2].
LSALT peptide significantly reduces mortality and organ damage in a murine polymicrobial sepsis model[2].
MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.
Chemical Information
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CAS No. 2567713-50-0
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Appearance Solid
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Molecular Weight 1774.11
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Formula C85H136N20O21
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Color White to off-white
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SMILES
O=C(N[C@@H](CO)C(N[C@@H](C)C(N[C@@H](CC(C)C)C(N[C@@H]([C@H](O)C)C(N1[C@@H](CCC1)C(N[C@@H](CO)C(N2[C@@H](CCC2)C(N[C@@H](CO)C(N[C@@H](CC3=CNC4=CC=CC=C34)C(N[C@@H](CC(C)C)C(N[C@@H](CCCCN)C(N[C@@H](CC5=CC=C(C=C5)O)C(N[C@@H](CCCCN)C(N[C@@H](C)C(N[C@@H](CC(C)C)C(N)=O)=O)=O)=O)=O)=O)=O)=O)=O)=O)=O)=O)=O)=O)=O)[C@H](CC(C)C)N
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Sequence
Leu-Ser-Ala-Leu-Thr-Pro-Ser-Pro-Ser-Trp-Leu-Lys-Tyr-Lys-Ala-Leu-NH2
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Sequence Shortening
LSALTPSPSWLKYKAL-NH2
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Shipping
Room temperature in continental US; may vary elsewhere.
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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 : 50 mg/mL (28.18 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 and light). 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 and light). 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)
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.
Add each solvent one by one: 10% DMSO 40% PEG300 5% Tween-80 45% Saline
Solubility: ≥ 3.57 mg/mL (2.01 mM); Clear solution
This protocol yields a clear solution of ≥ 3.57 mg/mL (saturation unknown).
Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (35.7 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 (1.41 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.
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:
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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 and light)
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.
Protocols
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Nephrotoxicity Study
This protocol assesses nephrotoxicity by combining functional kidney injury readouts, urinary/tissue injury biomarkers, and renal histopathology. Serum creatinine and BUN reflect impaired kidney function, while KIM-1, NGAL, clusterin, osteopontin, IL-18, cystatin C, nephrin, Oat5, urinary protein, glucose, and alkaline phosphatase have been used to detect tubular injury in cisplatin-, gentamicin-, and acetaminophen-induced nephrotoxicity models.
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LPS-Induced Endotoxemia/Systemic Inflammation
Lipopolysaccharide (LPS)-induced endotoxemia is a widely used in vivo model of acute systemic inflammation in which LPS, a Gram-negative bacterial endotoxin, activates innate immune signaling primarily through TLR4, leading to rapid and transient induction of pro-inflammatory cytokines such as TNF-α, IL-6, and IL-1β in circulation and tissues. This cytokine surge is commonly used as a measurable readout of systemic inflammatory activation and immune dysregulation, and is typically assessed within hours after intraperitoneal LPS administration in mouse models of endotoxemia. The model captures key features of systemic inflammatory response syndrome, including cytokine release, immune cell activation, and downstream tissue responses, and has been used to evaluate anti-inflammatory interventions such as cytokine modulation, lipid mediators, and immune cell-targeting therapies.
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Research Protocol for Inflammation-related Diseases
The NLRP3 inflammasome is a cytosolic innate immune signaling platform that integrates priming signals and danger-signal activation to promote caspase-1 activation, maturation of IL-1β and IL-18, and gasdermin D-mediated pyroptotic cell death. The core experimental logic is to determine whether inflammatory disease phenotypes are driven by increased NLRP3 expression, ASC-containing inflammasome assembly, caspase-1 cleavage, GSDMD cleavage, and extracellular release of IL-1β/IL-18 rather than by nonspecific cell injury alone. The pathway is strongly linked to inflammation-related disease phenotypes because monosodium urate crystals activate NALP3/NLRP3 inflammasome signaling in gout-like crystal inflammation, cholesterol crystals activate NLRP3 inflammasomes in atherogenesis models, and DSS-induced intestinal inflammation has been reported to involve NLRP3 inflammasome activity. However, experimental colitis studies also show context-dependent protective effects of NLRP3 inflammasome co
Purity & Documentation
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Data Sheet (276 KB)
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SDS (254 KB)
- English - EN (254 KB)
- Français - FR (254 KB)
- Deutsch - DE (254 KB)
- Norwegian - NO (254 KB)
- Español - ES (254 KB)
- Swedish - SV (254 KB)
- Italian - IT (254 KB)
- Korean - KR (254 KB)
- Portuguese - PT (254 KB)
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Handling Instructions (2659 KB)
References
[1]. Somayaji R, et al. Multicentre, randomised, double-blind, placebo-controlled, proof of concept study of LSALT peptide as prevention of acute respiratory distress syndrome and acute kidney injury in patients infected with SARS-CoV-2 (COVID-19). BMJ Open. 2024;14(3):e076142. Published 2024 Mar 15. [Content Brief]
[2]. Choudhury SR, et al. Dipeptidase-1 Is an Adhesion Receptor for Neutrophil Recruitment in Lungs and Liver. Cell. 2019;178(5):1205-1221.e17. [Content Brief]
[3]. Hilpert K. Peptides in COVID-19 Clinical Trials—A Snapshot. Biologics. 2021; 1(3):300-311.
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 |
|---|---|---|---|---|---|
| DMSO | 1 mM | 0.5637 mL | 2.8183 mL | 5.6366 mL | 14.0916 mL |
| 5 mM | 0.1127 mL | 0.5637 mL | 1.1273 mL | 2.8183 mL | |
| 10 mM | 0.0564 mL | 0.2818 mL | 0.5637 mL | 1.4092 mL | |
| 15 mM | 0.0376 mL | 0.1879 mL | 0.3758 mL | 0.9394 mL | |
| 20 mM | 0.0282 mL | 0.1409 mL | 0.2818 mL | 0.7046 mL | |
| 25 mM | 0.0225 mL | 0.1127 mL | 0.2255 mL | 0.5637 mL |
LSALT peptide Related Classifications
HY-P11879 Related Classifications
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