KPV (Lys-Pro-Val) is the C-terminal tripeptide fragment of α-melanocyte-stimulating hormone (α-MSH). Despite its small size, it is a well-studied tool compound in inflammatory-signaling research, notable because much of its activity appears to be independent of the classical melanocortin receptors that mediate α-MSH signaling. That property has made it a useful probe for dissecting receptor-dependent from receptor-independent anti-inflammatory pathways.
NF-κB Pathway Modulation
The most characterized line of KPV research concerns intracellular modulation of the NF-κB signaling cascade. In cultured epithelial and immune cells, KPV has been reported to reduce activation of NF-κB and downstream pro-inflammatory cytokine transcription. Because this occurs without a strict requirement for MC1R/MC3R engagement, KPV is often used to study the intracellular arm of α-MSH-related anti-inflammatory activity.
PepT1-Mediated Epithelial Uptake
A distinctive feature of KPV research is its transport. As a di/tripeptide, KPV can be taken up by intestinal epithelial cells via the PepT1 (SLC15A1) oligopeptide transporter. This transporter-mediated entry has made KPV a frequent model compound in studies of intestinal epithelial inflammation, where PepT1 expression is itself a variable of interest.
Research Applications
- NF-κB and pro-inflammatory cytokine pathway assays
- Melanocortin-independent anti-inflammatory mechanism studies
- PepT1/SLC15A1 oligopeptide-transport research
- Preclinical intestinal-epithelial inflammation models
- Structure-activity comparison against the parent α-MSH sequence
References
- Dalmasso G, Charrier-Hisamuddin L, et al. PepT1-mediated tripeptide KPV uptake reduces intestinal inflammation. Gastroenterology 2008. PMID: 18061177.
- Kannengiesser K, Maaser C, et al. Melanocortin-derived tripeptide KPV has anti-inflammatory potential in murine models of inflammatory bowel disease. Inflamm Bowel Dis 2008. PMID: 18092346.
This article summarizes publicly available research for educational purposes and does not constitute medical advice, a therapeutic claim, or a recommendation for human use. Products referenced are sold for laboratory research use only.