KPV is a three-residue peptide that has become a popular tool in inflammatory-signaling and epithelial research. This stand-alone overview explains what KPV is, where it comes from, which pathways it is studied in, and how labs set up experiments with a vial of KPV 10mg.
What Is KPV?
KPV is the tripeptide Lys-Pro-Val, with a molecular weight of roughly 342 Da. It corresponds to the C-terminal three residues (positions 11–13) of alpha-melanocyte-stimulating hormone (α-MSH), a 13-amino-acid neuropeptide derived from pro-opiomelanocortin (POMC). Early research on α-MSH found that much of its signaling activity in certain assays could be traced to this short C-terminal sequence, which led researchers to study KPV on its own.
Why Study a Fragment Instead of the Full Hormone?
Full-length α-MSH acts on several melanocortin receptors and influences pigmentation pathways. KPV is interesting to researchers because it appears to retain some signaling activity in cell models while being far simpler to synthesize and characterize. Its small size also allows experiments on peptide transport, since di- and tripeptides can be carried across cell membranes by specific transporters.
Research Areas for KPV
- NF-κB and cytokine signaling: Cell-culture studies examine how KPV exposure affects NF-κB activation and downstream cytokine expression in stimulated cells.
- PepT1-mediated uptake: KPV is a model substrate for the PepT1 di/tripeptide transporter, and intestinal epithelial cell lines are used to study its uptake.
- Epithelial barrier models: Researchers measure tight-junction protein expression and transepithelial electrical resistance (TEER) in monolayer systems.
- Delivery formulations: Because KPV is so small, it is used to test nanoparticle and hydrogel delivery systems in preclinical work.
Setting Up a KPV Experiment
A few practical points help KPV studies produce clean data:
- Choose a stimulus. Many in-vitro designs pre-stimulate cells (for example with LPS or a cytokine) and then measure how KPV changes the response. Include stimulus-only and vehicle-only arms.
- Control for transport. If uptake matters to your question, a competing dipeptide or a PepT1-low cell line can help confirm transporter involvement.
- Time your readouts. Phospho-protein signaling changes within minutes, while cytokine mRNA and protein readouts need hours.
- Mind the salt form. Short peptides are often supplied as acetate or TFA salts; note which one you use. See Acetate vs TFA salt forms.
KPV in Context With Other Research Peptides
KPV is often mentioned alongside other short peptides studied in epithelial and tissue models, such as BPC-157 and GHK-Cu. It is also one of the four components of our KLOW blend (GHK-Cu, BPC-157, TB-500 and KPV) for labs that want a multi-compound arm. For a direct pairing, read BPC-157 vs KPV.
Storage and Quality
KPV is supplied lyophilized. Keep vials sealed, cold and dry, and aliquot reconstituted stock to limit freeze-thaw cycles. On the certificate of analysis, confirm HPLC purity of 99% or better, a mass-spec identity near 342 Da, and a lot number that matches your vial.
KPV FAQ
Is KPV the same as α-MSH? No. KPV is only the last three amino acids of α-MSH and is studied as a separate, much smaller research peptide.
Does KPV affect pigmentation in cell models? KPV is generally studied for signaling outside the classic pigmentation pathway, which is associated with other regions of the full α-MSH sequence.
Why is KPV used in transporter studies? As a tripeptide, it fits the size range carried by PepT1, making it a convenient model substrate.
Recording KPV Lots and Conditions
Because KPV is often run alongside larger peptides, keep a simple log for every experiment: lot number, salt form, reconstitution solvent and date, stock concentration, and number of freeze-thaw cycles. Short peptides are generally stable, but documenting these details makes it far easier to explain unexpected variation between runs or between labs. Our article on lot numbers and batch traceability shows how to tie each result back to a specific vial and certificate.
Explore Related Research
Browse the Immune & Gut Research collection for related compounds.
Research Use Only. All compounds referenced in this article are sold by Genetic Peptides USA strictly for in-vitro and laboratory research. They are not for human or animal consumption, are not drugs, foods, or cosmetics, and are not intended to diagnose, treat, cure, or prevent any disease. This article summarizes published scientific context for educational purposes and contains no dosing guidance.