KPV (Lys-Pro-Val) is the C-terminal tripeptide fragment of α-melanocyte-stimulating hormone (α-MSH). Kannengiesser et al. studied KPV in mouse colitis models, including mice with nonfunctional MC1R, and described its effects as at least partially independent of MC1R signaling. This does not establish independence from every melanocortin receptor.
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. Dalmasso et al. studied human intestinal epithelial and immune cell lines and identified PepT1-mediated KPV uptake. In those cell lines, KPV did not raise cAMP despite melanocortin-receptor expression, and the authors concluded that its anti-inflammatory effect there was PepT1-mediated rather than melanocortin receptor-mediated.
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
- KPV signaling in mouse colitis with nonfunctional MC1R
- PepT1/SLC15A1 oligopeptide-transport research
- Preclinical intestinal-epithelial inflammation models
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.